1 # Copyright (C) 1999, 2001, 2003, 2004, 2005, 2006, 2007
2 # Free Software Foundation, Inc.
4 # This program is free software; you can redistribute it and/or modify
5 # it under the terms of the GNU General Public License as published by
6 # the Free Software Foundation; either version 3 of the License, or
7 # (at your option) any later version.
9 # This program is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 # GNU General Public License for more details.
14 # You should have received a copy of the GNU General Public License
15 # along with GCC; see the file COPYING3. If not see
16 # <http://www.gnu.org/licenses/>.
18 # Please email any bugs, comments, and/or additions to this file to:
19 # gcc-patches@gcc.gnu.org
21 # This file defines procs for determining features supported by the target.
23 # Try to compile the code given by CONTENTS into an output file of
24 # type TYPE, where TYPE is as for target_compile. Return a list
25 # whose first element contains the compiler messages and whose
26 # second element is the name of the output file.
28 # BASENAME is a prefix to use for source and output files.
29 # If ARGS is not empty, its first element is a string that
30 # should be added to the command line.
32 # Assume by default that CONTENTS is C code. C++ code should contain
33 # "// C++" and Fortran code should contain "! Fortran".
34 proc check_compile {basename type contents args} {
37 if { [llength $args] > 0 } {
38 set options [list "additional_flags=[lindex $args 0]"]
42 switch -glob -- $contents {
43 "*! Fortran*" { set src ${basename}[pid].f90 }
44 "*// C++*" { set src ${basename}[pid].cc }
45 default { set src ${basename}[pid].c }
47 set compile_type $type
49 assembly { set output ${basename}[pid].s }
50 object { set output ${basename}[pid].o }
51 executable { set output ${basename}[pid].exe }
53 set output ${basename}[pid].s
54 lappend options "additional_flags=-fdump-$type"
55 set compile_type assembly
61 set lines [${tool}_target_compile $src $output $compile_type "$options"]
64 set scan_output $output
65 # Don't try folding this into the switch above; calling "glob" before the
66 # file is created won't work.
67 if [regexp "rtl-(.*)" $type dummy rtl_type] {
68 set scan_output "[glob $src.\[0-9\]\[0-9\]\[0-9\]r.$rtl_type]"
72 return [list $lines $scan_output]
75 proc current_target_name { } {
77 if [info exists target_info(target,name)] {
78 set answer $target_info(target,name)
85 # Implement an effective-target check for property PROP by invoking
86 # the Tcl command ARGS and seeing if it returns true.
88 proc check_cached_effective_target { prop args } {
91 set target [current_target_name]
92 if {![info exists et_cache($prop,target)]
93 || $et_cache($prop,target) != $target} {
94 verbose "check_cached_effective_target $prop: checking $target" 2
95 set et_cache($prop,target) $target
96 set et_cache($prop,value) [uplevel eval $args]
98 set value $et_cache($prop,value)
99 verbose "check_cached_effective_target $prop: returning $value for $target" 2
103 # Like check_compile, but delete the output file and return true if the
104 # compiler printed no messages.
105 proc check_no_compiler_messages_nocache {args} {
106 set result [eval check_compile $args]
107 set lines [lindex $result 0]
108 set output [lindex $result 1]
109 remote_file build delete $output
110 return [string match "" $lines]
113 # Like check_no_compiler_messages_nocache, but cache the result.
114 # PROP is the property we're checking, and doubles as a prefix for
115 # temporary filenames.
116 proc check_no_compiler_messages {prop args} {
117 return [check_cached_effective_target $prop {
118 eval [list check_no_compiler_messages_nocache $prop] $args
122 # Like check_compile, but return true if the compiler printed no
123 # messages and if the contents of the output file satisfy PATTERN.
124 # If PATTERN has the form "!REGEXP", the contents satisfy it if they
125 # don't match regular expression REGEXP, otherwise they satisfy it
126 # if they do match regular expression PATTERN. (PATTERN can start
127 # with something like "[!]" if the regular expression needs to match
128 # "!" as the first character.)
130 # Delete the output file before returning. The other arguments are
131 # as for check_compile.
132 proc check_no_messages_and_pattern_nocache {basename pattern args} {
135 set result [eval [list check_compile $basename] $args]
136 set lines [lindex $result 0]
137 set output [lindex $result 1]
140 if { [string match "" $lines] } {
141 set chan [open "$output"]
142 set invert [regexp {^!(.*)} $pattern dummy pattern]
143 set ok [expr { [regexp $pattern [read $chan]] != $invert }]
147 remote_file build delete $output
151 # Like check_no_messages_and_pattern_nocache, but cache the result.
152 # PROP is the property we're checking, and doubles as a prefix for
153 # temporary filenames.
154 proc check_no_messages_and_pattern {prop pattern args} {
155 return [check_cached_effective_target $prop {
156 eval [list check_no_messages_and_pattern_nocache $prop $pattern] $args
160 # Try to compile and run an executable from code CONTENTS. Return true
161 # if the compiler reports no messages and if execution "passes" in the
162 # usual DejaGNU sense. The arguments are as for check_compile, with
163 # TYPE implicitly being "executable".
164 proc check_runtime_nocache {basename contents args} {
167 set result [eval [list check_compile $basename executable $contents] $args]
168 set lines [lindex $result 0]
169 set output [lindex $result 1]
172 if { [string match "" $lines] } {
173 # No error messages, everything is OK.
174 set result [remote_load target "./$output" "" ""]
175 set status [lindex $result 0]
176 verbose "check_runtime_nocache $basename: status is <$status>" 2
177 if { $status == "pass" } {
181 remote_file build delete $output
185 # Like check_runtime_nocache, but cache the result. PROP is the
186 # property we're checking, and doubles as a prefix for temporary
188 proc check_runtime {prop args} {
191 return [check_cached_effective_target $prop {
192 eval [list check_runtime_nocache $prop] $args
196 ###############################
197 # proc check_weak_available { }
198 ###############################
200 # weak symbols are only supported in some configs/object formats
201 # this proc returns 1 if they're supported, 0 if they're not, or -1 if unsure
203 proc check_weak_available { } {
204 global target_triplet
207 # All mips targets should support it
209 if { [ string first "mips" $target_cpu ] >= 0 } {
213 # All solaris2 targets should support it
215 if { [regexp ".*-solaris2.*" $target_triplet] } {
219 # DEC OSF/1/Digital UNIX/Tru64 UNIX supports it
221 if { [regexp "alpha.*osf.*" $target_triplet] } {
225 # Windows targets Cygwin and MingW32 support it
227 if { [regexp ".*mingw32|.*cygwin" $target_triplet] } {
231 # HP-UX 10.X doesn't support it
233 if { [istarget "hppa*-*-hpux10*"] } {
237 # ELF and ECOFF support it. a.out does with gas/gld but may also with
238 # other linkers, so we should try it
240 set objformat [gcc_target_object_format]
248 unknown { return -1 }
253 ###############################
254 # proc check_visibility_available { what_kind }
255 ###############################
257 # The visibility attribute is only support in some object formats
258 # This proc returns 1 if it is supported, 0 if not.
259 # The argument is the kind of visibility, default/protected/hidden/internal.
261 proc check_visibility_available { what_kind } {
263 global target_triplet
265 # On NetWare, support makes no sense.
266 if { [istarget *-*-netware*] } {
270 if [string match "" $what_kind] { set what_kind "hidden" }
272 return [check_no_compiler_messages visibility_available_$what_kind object "
273 void f() __attribute__((visibility(\"$what_kind\")));
278 ###############################
279 # proc check_alias_available { }
280 ###############################
282 # Determine if the target toolchain supports the alias attribute.
284 # Returns 2 if the target supports aliases. Returns 1 if the target
285 # only supports weak aliased. Returns 0 if the target does not
286 # support aliases at all. Returns -1 if support for aliases could not
289 proc check_alias_available { } {
290 global alias_available_saved
293 if [info exists alias_available_saved] {
294 verbose "check_alias_available returning saved $alias_available_saved" 2
298 verbose "check_alias_available compiling testfile $src" 2
299 set f [open $src "w"]
300 # Compile a small test program. The definition of "g" is
301 # necessary to keep the Solaris assembler from complaining
303 puts $f "#ifdef __cplusplus\nextern \"C\"\n#endif\n"
304 puts $f "void g() {} void f() __attribute__((alias(\"g\")));"
306 set lines [${tool}_target_compile $src $obj object ""]
308 remote_file build delete $obj
310 if [string match "" $lines] then {
311 # No error messages, everything is OK.
312 set alias_available_saved 2
314 if [regexp "alias definitions not supported" $lines] {
315 verbose "check_alias_available target does not support aliases" 2
317 set objformat [gcc_target_object_format]
319 if { $objformat == "elf" } {
320 verbose "check_alias_available but target uses ELF format, so it ought to" 2
321 set alias_available_saved -1
323 set alias_available_saved 0
326 if [regexp "only weak aliases are supported" $lines] {
327 verbose "check_alias_available target supports only weak aliases" 2
328 set alias_available_saved 1
330 set alias_available_saved -1
335 verbose "check_alias_available returning $alias_available_saved" 2
338 return $alias_available_saved
341 # Returns true if --gc-sections is supported on the target.
343 proc check_gc_sections_available { } {
344 global gc_sections_available_saved
347 if {![info exists gc_sections_available_saved]} {
348 # Some targets don't support gc-sections despite whatever's
349 # advertised by ld's options.
350 if { [istarget alpha*-*-*]
351 || [istarget ia64-*-*] } {
352 set gc_sections_available_saved 0
356 # elf2flt uses -q (--emit-relocs), which is incompatible with
358 if { [board_info target exists ldflags]
359 && [regexp " -elf2flt\[ =\]" " [board_info target ldflags] "] } {
360 set gc_sections_available_saved 0
364 # VxWorks kernel modules are relocatable objects linked with -r,
365 # while RTP executables are linked with -q (--emit-relocs).
366 # Both of these options are incompatible with --gc-sections.
367 if { [istarget *-*-vxworks*] } {
368 set gc_sections_available_saved 0
372 # Check if the ld used by gcc supports --gc-sections.
373 set gcc_spec [${tool}_target_compile "-dumpspecs" "" "none" ""]
374 regsub ".*\n\*linker:\[ \t\]*\n(\[^ \t\n\]*).*" "$gcc_spec" {\1} linker
375 set gcc_ld [lindex [${tool}_target_compile "-print-prog-name=$linker" "" "none" ""] 0]
376 set ld_output [remote_exec host "$gcc_ld" "--help"]
377 if { [ string first "--gc-sections" $ld_output ] >= 0 } {
378 set gc_sections_available_saved 1
380 set gc_sections_available_saved 0
383 return $gc_sections_available_saved
386 # Return 1 if according to target_info struct and explicit target list
387 # target is supposed to support trampolines.
389 proc check_effective_target_trampolines { } {
390 if [target_info exists no_trampolines] {
393 if { [istarget avr-*-*]
394 || [istarget hppa2.0w-hp-hpux11.23]
395 || [istarget hppa64-hp-hpux11.23] } {
401 # Return 1 if according to target_info struct and explicit target list
402 # target is supposed to keep null pointer checks. This could be due to
403 # use of option fno-delete-null-pointer-checks or hardwired in target.
405 proc check_effective_target_keeps_null_pointer_checks { } {
406 if [target_info exists keeps_null_pointer_checks] {
409 if { [istarget avr-*-*] } {
415 # Return true if profiling is supported on the target.
417 proc check_profiling_available { test_what } {
418 global profiling_available_saved
420 verbose "Profiling argument is <$test_what>" 1
422 # These conditions depend on the argument so examine them before
423 # looking at the cache variable.
425 # Support for -p on solaris2 relies on mcrt1.o which comes with the
426 # vendor compiler. We cannot reliably predict the directory where the
427 # vendor compiler (and thus mcrt1.o) is installed so we can't
428 # necessarily find mcrt1.o even if we have it.
429 if { [istarget *-*-solaris2*] && [lindex $test_what 1] == "-p" } {
433 # Support for -p on irix relies on libprof1.a which doesn't appear to
434 # exist on any irix6 system currently posting testsuite results.
435 # Support for -pg on irix relies on gcrt1.o which doesn't exist yet.
436 # See: http://gcc.gnu.org/ml/gcc/2002-10/msg00169.html
437 if { [istarget mips*-*-irix*]
438 && ([lindex $test_what 1] == "-p" || [lindex $test_what 1] == "-pg") } {
442 # We don't yet support profiling for MIPS16.
443 if { [istarget mips*-*-*]
444 && ![check_effective_target_nomips16]
445 && ([lindex $test_what 1] == "-p"
446 || [lindex $test_what 1] == "-pg") } {
450 # MinGW does not support -p.
451 if { [istarget *-*-mingw*] && [lindex $test_what 1] == "-p" } {
455 # At present, there is no profiling support on NetWare.
456 if { [istarget *-*-netware*] } {
460 # uClibc does not have gcrt1.o.
461 if { [check_effective_target_uclibc]
462 && ([lindex $test_what 1] == "-p"
463 || [lindex $test_what 1] == "-pg") } {
467 # Now examine the cache variable.
468 if {![info exists profiling_available_saved]} {
469 # Some targets don't have any implementation of __bb_init_func or are
470 # missing other needed machinery.
471 if { [istarget mmix-*-*]
472 || [istarget arm*-*-eabi*]
473 || [istarget arm*-*-elf]
474 || [istarget arm*-*-symbianelf*]
475 || [istarget avr-*-*]
476 || [istarget bfin-*-*]
477 || [istarget powerpc-*-eabi*]
478 || [istarget cris-*-*]
479 || [istarget crisv32-*-*]
480 || [istarget fido-*-elf]
481 || [istarget h8300-*-*]
482 || [istarget m32c-*-elf]
483 || [istarget m68k-*-elf]
484 || [istarget m68k-*-uclinux*]
485 || [istarget mips*-*-elf*]
486 || [istarget xstormy16-*]
487 || [istarget xtensa*-*-elf]
488 || [istarget *-*-vxworks*] } {
489 set profiling_available_saved 0
491 set profiling_available_saved 1
495 return $profiling_available_saved
498 # Return 1 if target has packed layout of structure members by
499 # default, 0 otherwise. Note that this is slightly different than
500 # whether the target has "natural alignment": both attributes may be
503 proc check_effective_target_default_packed { } {
504 return [check_no_compiler_messages default_packed assembly {
505 struct x { char a; long b; } c;
506 int s[sizeof (c) == sizeof (char) + sizeof (long) ? 1 : -1];
510 # Return 1 if target has PCC_BITFIELD_TYPE_MATTERS defined. See
511 # documentation, where the test also comes from.
513 proc check_effective_target_pcc_bitfield_type_matters { } {
514 # PCC_BITFIELD_TYPE_MATTERS isn't just about unnamed or empty
515 # bitfields, but let's stick to the example code from the docs.
516 return [check_no_compiler_messages pcc_bitfield_type_matters assembly {
517 struct foo1 { char x; char :0; char y; };
518 struct foo2 { char x; int :0; char y; };
519 int s[sizeof (struct foo1) != sizeof (struct foo2) ? 1 : -1];
523 # Return 1 if thread local storage (TLS) is supported, 0 otherwise.
525 # This won't change for different subtargets so cache the result.
527 proc check_effective_target_tls {} {
528 return [check_no_compiler_messages tls assembly {
530 int f (void) { return i; }
531 void g (int j) { i = j; }
535 # Return 1 if *native* thread local storage (TLS) is supported, 0 otherwise.
537 # This won't change for different subtargets so cache the result.
539 proc check_effective_target_tls_native {} {
540 # VxWorks uses emulated TLS machinery, but with non-standard helper
541 # functions, so we fail to automatically detect it.
542 global target_triplet
543 if { [regexp ".*-.*-vxworks.*" $target_triplet] } {
547 return [check_no_messages_and_pattern tls_native "!emutls" assembly {
549 int f (void) { return i; }
550 void g (int j) { i = j; }
554 # Return 1 if TLS executables can run correctly, 0 otherwise.
556 # This won't change for different subtargets so cache the result.
558 proc check_effective_target_tls_runtime {} {
559 return [check_runtime tls_runtime {
560 __thread int thr = 0;
561 int main (void) { return thr; }
565 # Return 1 if compilation with -fgraphite is error-free for trivial
568 proc check_effective_target_fgraphite {} {
569 return [check_no_compiler_messages fgraphite object {
574 # Return 1 if compilation with -fopenmp is error-free for trivial
577 proc check_effective_target_fopenmp {} {
578 return [check_no_compiler_messages fopenmp object {
583 # Return 1 if compilation with -pthread is error-free for trivial
586 proc check_effective_target_pthread {} {
587 return [check_no_compiler_messages pthread object {
592 # Return 1 if the target supports -fstack-protector
593 proc check_effective_target_fstack_protector {} {
594 return [check_runtime fstack_protector {
595 int main (void) { return 0; }
596 } "-fstack-protector"]
599 # Return 1 if compilation with -freorder-blocks-and-partition is error-free
600 # for trivial code, 0 otherwise.
602 proc check_effective_target_freorder {} {
603 return [check_no_compiler_messages freorder object {
605 } "-freorder-blocks-and-partition"]
608 # Return 1 if -fpic and -fPIC are supported, as in no warnings or errors
609 # emitted, 0 otherwise. Whether a shared library can actually be built is
610 # out of scope for this test.
612 proc check_effective_target_fpic { } {
613 # Note that M68K has a multilib that supports -fpic but not
614 # -fPIC, so we need to check both. We test with a program that
615 # requires GOT references.
616 foreach arg {fpic fPIC} {
617 if [check_no_compiler_messages $arg object {
618 extern int foo (void); extern int bar;
619 int baz (void) { return foo () + bar; }
627 # Return true if the target supports -mpaired-single (as used on MIPS).
629 proc check_effective_target_mpaired_single { } {
630 return [check_no_compiler_messages mpaired_single object {
635 # Return true if the target has access to FPU instructions.
637 proc check_effective_target_hard_float { } {
638 if { [istarget mips*-*-*] } {
639 return [check_no_compiler_messages hard_float assembly {
640 #if (defined __mips_soft_float || defined __mips16)
646 # The generic test equates hard_float with "no call for adding doubles".
647 return [check_no_messages_and_pattern hard_float "!\\(call" rtl-expand {
648 double a (double b, double c) { return b + c; }
652 # Return true if the target is a 64-bit MIPS target.
654 proc check_effective_target_mips64 { } {
655 return [check_no_compiler_messages mips64 assembly {
662 # Return true if the target is a MIPS target that does not produce
665 proc check_effective_target_nomips16 { } {
666 return [check_no_compiler_messages nomips16 object {
670 /* A cheap way of testing for -mflip-mips16. */
671 void foo (void) { asm ("addiu $20,$20,1"); }
672 void bar (void) { asm ("addiu $20,$20,1"); }
677 # Add the options needed for MIPS16 function attributes. At the moment,
678 # we don't support MIPS16 PIC.
680 proc add_options_for_mips16_attribute { flags } {
681 return "$flags -mno-abicalls -fno-pic -DMIPS16=__attribute__((mips16))"
684 # Return true if we can force a mode that allows MIPS16 code generation.
685 # We don't support MIPS16 PIC, and only support MIPS16 -mhard-float
688 proc check_effective_target_mips16_attribute { } {
689 return [check_no_compiler_messages mips16_attribute assembly {
693 #if defined __mips_hard_float \
694 && (!defined _ABIO32 || _MIPS_SIM != _ABIO32) \
695 && (!defined _ABIO64 || _MIPS_SIM != _ABIO64)
698 } [add_options_for_mips16_attribute ""]]
701 # Return 1 if the current multilib does not generate PIC by default.
703 proc check_effective_target_nonpic { } {
704 return [check_no_compiler_messages nonpic assembly {
711 # Return 1 if the target does not use a status wrapper.
713 proc check_effective_target_unwrapped { } {
714 if { [target_info needs_status_wrapper] != "" \
715 && [target_info needs_status_wrapper] != "0" } {
721 # Return true if iconv is supported on the target. In particular IBM1047.
723 proc check_iconv_available { test_what } {
726 # If the tool configuration file has not set libiconv, try "-liconv"
727 if { ![info exists libiconv] } {
728 set libiconv "-liconv"
730 set test_what [lindex $test_what 1]
731 return [check_runtime_nocache $test_what [subst {
737 cd = iconv_open ("$test_what", "UTF-8");
738 if (cd == (iconv_t) -1)
745 # Return true if named sections are supported on this target.
747 proc check_named_sections_available { } {
748 return [check_no_compiler_messages named_sections assembly {
749 int __attribute__ ((section("whatever"))) foo;
753 # Return 1 if the target supports Fortran real kinds larger than real(8),
756 # When the target name changes, replace the cached result.
758 proc check_effective_target_fortran_large_real { } {
759 return [check_no_compiler_messages fortran_large_real executable {
761 integer,parameter :: k = selected_real_kind (precision (0.0_8) + 1)
768 # Return 1 if the target supports Fortran integer kinds larger than
769 # integer(8), 0 otherwise.
771 # When the target name changes, replace the cached result.
773 proc check_effective_target_fortran_large_int { } {
774 return [check_no_compiler_messages fortran_large_int executable {
776 integer,parameter :: k = selected_int_kind (range (0_8) + 1)
782 # Return 1 if the target supports Fortran integer(16), 0 otherwise.
784 # When the target name changes, replace the cached result.
786 proc check_effective_target_fortran_integer_16 { } {
787 return [check_no_compiler_messages fortran_integer_16 executable {
794 # Return 1 if we can statically link libgfortran, 0 otherwise.
796 # When the target name changes, replace the cached result.
798 proc check_effective_target_static_libgfortran { } {
799 return [check_no_compiler_messages static_libgfortran executable {
806 # Return 1 if the target supports executing 750CL paired-single instructions, 0
807 # otherwise. Cache the result.
809 proc check_750cl_hw_available { } {
810 return [check_cached_effective_target 750cl_hw_available {
811 # If this is not the right target then we can skip the test.
812 if { ![istarget powerpc-*paired*] } {
815 check_runtime_nocache 750cl_hw_available {
819 asm volatile ("ps_mul v0,v0,v0");
821 asm volatile ("ps_mul 0,0,0");
830 # Return 1 if the target supports executing SSE2 instructions, 0
831 # otherwise. Cache the result.
833 proc check_sse2_hw_available { } {
834 return [check_cached_effective_target sse2_hw_available {
835 # If this is not the right target then we can skip the test.
836 if { !([istarget x86_64-*-*] || [istarget i?86-*-*]) } {
839 check_runtime_nocache sse2_hw_available {
843 unsigned int eax, ebx, ecx, edx = 0;
844 if (__get_cpuid (1, &eax, &ebx, &ecx, &edx))
845 return !(edx & bit_SSE2);
853 # Return 1 if the target supports executing AltiVec instructions, 0
854 # otherwise. Cache the result.
856 proc check_vmx_hw_available { } {
857 return [check_cached_effective_target vmx_hw_available {
858 # Some simulators are known to not support VMX instructions.
859 if { [istarget powerpc-*-eabi] || [istarget powerpc*-*-eabispe] } {
862 # Most targets don't require special flags for this test case, but
864 if { [istarget *-*-darwin*]
865 || [istarget *-*-aix*] } {
866 set options "-maltivec"
870 check_runtime_nocache vmx_hw_available {
874 asm volatile ("vor v0,v0,v0");
876 asm volatile ("vor 0,0,0");
885 # GCC 3.4.0 for powerpc64-*-linux* included an ABI fix for passing
886 # complex float arguments. This affects gfortran tests that call cabsf
887 # in libm built by an earlier compiler. Return 1 if libm uses the same
888 # argument passing as the compiler under test, 0 otherwise.
890 # When the target name changes, replace the cached result.
892 proc check_effective_target_broken_cplxf_arg { } {
893 return [check_cached_effective_target broken_cplxf_arg {
894 # Skip the work for targets known not to be affected.
895 if { ![istarget powerpc64-*-linux*] } {
897 } elseif { ![is-effective-target lp64] } {
900 check_runtime_nocache broken_cplxf_arg {
902 extern void abort (void);
904 float cabsf (_Complex float);
911 if (fabsf (f - 5.0) > 0.0001)
920 proc check_alpha_max_hw_available { } {
921 return [check_runtime alpha_max_hw_available {
922 int main() { return __builtin_alpha_amask(1<<8) != 0; }
926 # Returns true iff the FUNCTION is available on the target system.
927 # (This is essentially a Tcl implementation of Autoconf's
930 proc check_function_available { function } {
931 return [check_no_compiler_messages ${function}_available \
937 int main () { $function (); }
941 # Returns true iff "fork" is available on the target system.
943 proc check_fork_available {} {
944 return [check_function_available "fork"]
947 # Returns true iff "mkfifo" is available on the target system.
949 proc check_mkfifo_available {} {
950 if {[istarget *-*-cygwin*]} {
951 # Cygwin has mkfifo, but support is incomplete.
955 return [check_function_available "mkfifo"]
958 # Returns true iff "__cxa_atexit" is used on the target system.
960 proc check_cxa_atexit_available { } {
961 return [check_cached_effective_target cxa_atexit_available {
962 if { [istarget "hppa*-*-hpux10*"] } {
963 # HP-UX 10 doesn't have __cxa_atexit but subsequent test passes.
966 check_runtime_nocache cxa_atexit_available {
969 static unsigned int count;
986 Y() { f(); count = 2; }
995 int main() { return 0; }
1002 # Return 1 if we're generating 32-bit code using default options, 0
1005 proc check_effective_target_ilp32 { } {
1006 return [check_no_compiler_messages ilp32 object {
1007 int dummy[sizeof (int) == 4
1008 && sizeof (void *) == 4
1009 && sizeof (long) == 4 ? 1 : -1];
1013 # Return 1 if we're generating 32-bit or larger integers using default
1014 # options, 0 otherwise.
1016 proc check_effective_target_int32plus { } {
1017 return [check_no_compiler_messages int32plus object {
1018 int dummy[sizeof (int) >= 4 ? 1 : -1];
1022 # Return 1 if we're generating 32-bit or larger pointers using default
1023 # options, 0 otherwise.
1025 proc check_effective_target_ptr32plus { } {
1026 return [check_no_compiler_messages ptr32plus object {
1027 int dummy[sizeof (void *) >= 4 ? 1 : -1];
1031 # Return 1 if we support 32-bit or larger array and structure sizes
1032 # using default options, 0 otherwise.
1034 proc check_effective_target_size32plus { } {
1035 return [check_no_compiler_messages size32plus object {
1040 # Returns 1 if we're generating 16-bit or smaller integers with the
1041 # default options, 0 otherwise.
1043 proc check_effective_target_int16 { } {
1044 return [check_no_compiler_messages int16 object {
1045 int dummy[sizeof (int) < 4 ? 1 : -1];
1049 # Return 1 if we're generating 64-bit code using default options, 0
1052 proc check_effective_target_lp64 { } {
1053 return [check_no_compiler_messages lp64 object {
1054 int dummy[sizeof (int) == 4
1055 && sizeof (void *) == 8
1056 && sizeof (long) == 8 ? 1 : -1];
1060 # Return 1 if the target supports long double larger than double,
1063 proc check_effective_target_large_long_double { } {
1064 return [check_no_compiler_messages large_long_double object {
1065 int dummy[sizeof(long double) > sizeof(double) ? 1 : -1];
1069 # Return 1 if the target supports compiling fixed-point,
1072 proc check_effective_target_fixed_point { } {
1073 return [check_no_compiler_messages fixed_point object {
1074 _Sat _Fract x; _Sat _Accum y;
1078 # Return 1 if the target supports compiling decimal floating point,
1081 proc check_effective_target_dfp_nocache { } {
1082 verbose "check_effective_target_dfp_nocache: compiling source" 2
1083 set ret [check_no_compiler_messages_nocache dfp object {
1084 _Decimal32 x; _Decimal64 y; _Decimal128 z;
1086 verbose "check_effective_target_dfp_nocache: returning $ret" 2
1090 proc check_effective_target_dfprt_nocache { } {
1091 return [check_runtime_nocache dfprt {
1092 _Decimal32 x = 1.2df; _Decimal64 y = 2.3dd; _Decimal128 z;
1093 int main () { z = x + y; return 0; }
1097 # Return 1 if the target supports compiling Decimal Floating Point,
1100 # This won't change for different subtargets so cache the result.
1102 proc check_effective_target_dfp { } {
1103 return [check_cached_effective_target dfp {
1104 check_effective_target_dfp_nocache
1108 # Return 1 if the target supports linking and executing Decimal Floating
1109 # Point, # 0 otherwise.
1111 # This won't change for different subtargets so cache the result.
1113 proc check_effective_target_dfprt { } {
1114 return [check_cached_effective_target dfprt {
1115 check_effective_target_dfprt_nocache
1119 # Return 1 if the target needs a command line argument to enable a SIMD
1122 proc check_effective_target_vect_cmdline_needed { } {
1123 global et_vect_cmdline_needed_saved
1124 global et_vect_cmdline_needed_target_name
1126 if { ![info exists et_vect_cmdline_needed_target_name] } {
1127 set et_vect_cmdline_needed_target_name ""
1130 # If the target has changed since we set the cached value, clear it.
1131 set current_target [current_target_name]
1132 if { $current_target != $et_vect_cmdline_needed_target_name } {
1133 verbose "check_effective_target_vect_cmdline_needed: `$et_vect_cmdline_needed_target_name' `$current_target'" 2
1134 set et_vect_cmdline_needed_target_name $current_target
1135 if { [info exists et_vect_cmdline_needed_saved] } {
1136 verbose "check_effective_target_vect_cmdline_needed: removing cached result" 2
1137 unset et_vect_cmdline_needed_saved
1141 if [info exists et_vect_cmdline_needed_saved] {
1142 verbose "check_effective_target_vect_cmdline_needed: using cached result" 2
1144 set et_vect_cmdline_needed_saved 1
1145 if { [istarget ia64-*-*]
1146 || (([istarget x86_64-*-*] || [istarget i?86-*-*])
1147 && [check_effective_target_lp64])
1148 || ([istarget powerpc*-*-*]
1149 && ([check_effective_target_powerpc_spe]
1150 || [check_effective_target_powerpc_altivec]))
1151 || [istarget spu-*-*]
1152 || ([istarget arm*-*-*] && [check_effective_target_arm_neon]) } {
1153 set et_vect_cmdline_needed_saved 0
1157 verbose "check_effective_target_vect_cmdline_needed: returning $et_vect_cmdline_needed_saved" 2
1158 return $et_vect_cmdline_needed_saved
1161 # Return 1 if the target supports hardware vectors of int, 0 otherwise.
1163 # This won't change for different subtargets so cache the result.
1165 proc check_effective_target_vect_int { } {
1166 global et_vect_int_saved
1168 if [info exists et_vect_int_saved] {
1169 verbose "check_effective_target_vect_int: using cached result" 2
1171 set et_vect_int_saved 0
1172 if { [istarget i?86-*-*]
1173 || ([istarget powerpc*-*-*]
1174 && ![istarget powerpc-*-linux*paired*])
1175 || [istarget spu-*-*]
1176 || [istarget x86_64-*-*]
1177 || [istarget sparc*-*-*]
1178 || [istarget alpha*-*-*]
1179 || [istarget ia64-*-*]
1180 || [check_effective_target_arm32] } {
1181 set et_vect_int_saved 1
1185 verbose "check_effective_target_vect_int: returning $et_vect_int_saved" 2
1186 return $et_vect_int_saved
1189 # Return 1 if the target supports int->float conversion
1192 proc check_effective_target_vect_intfloat_cvt { } {
1193 global et_vect_intfloat_cvt_saved
1195 if [info exists et_vect_intfloat_cvt_saved] {
1196 verbose "check_effective_target_vect_intfloat_cvt: using cached result" 2
1198 set et_vect_intfloat_cvt_saved 0
1199 if { [istarget i?86-*-*]
1200 || ([istarget powerpc*-*-*]
1201 && ![istarget powerpc-*-linux*paired*])
1202 || [istarget x86_64-*-*] } {
1203 set et_vect_intfloat_cvt_saved 1
1207 verbose "check_effective_target_vect_intfloat_cvt: returning $et_vect_intfloat_cvt_saved" 2
1208 return $et_vect_intfloat_cvt_saved
1212 # Return 1 if the target supports float->int conversion
1215 proc check_effective_target_vect_floatint_cvt { } {
1216 global et_vect_floatint_cvt_saved
1218 if [info exists et_vect_floatint_cvt_saved] {
1219 verbose "check_effective_target_vect_floatint_cvt: using cached result" 2
1221 set et_vect_floatint_cvt_saved 0
1222 if { [istarget i?86-*-*]
1223 || ([istarget powerpc*-*-*]
1224 && ![istarget powerpc-*-linux*paired*])
1225 || [istarget x86_64-*-*] } {
1226 set et_vect_floatint_cvt_saved 1
1230 verbose "check_effective_target_vect_floatint_cvt: returning $et_vect_floatint_cvt_saved" 2
1231 return $et_vect_floatint_cvt_saved
1234 # Return 1 is this is an arm target using 32-bit instructions
1235 proc check_effective_target_arm32 { } {
1236 return [check_no_compiler_messages arm32 assembly {
1237 #if !defined(__arm__) || (defined(__thumb__) && !defined(__thumb2__))
1243 # Return 1 if this is an ARM target supporting -mfpu=vfp
1244 # -mfloat-abi=softfp. Some multilibs may be incompatible with these
1247 proc check_effective_target_arm_vfp_ok { } {
1248 if { [check_effective_target_arm32] } {
1249 return [check_no_compiler_messages arm_vfp_ok object {
1251 } "-mfpu=vfp -mfloat-abi=softfp"]
1257 # Return 1 if this is an ARM target supporting -mfpu=neon
1258 # -mfloat-abi=softfp. Some multilibs may be incompatible with these
1261 proc check_effective_target_arm_neon_ok { } {
1262 if { [check_effective_target_arm32] } {
1263 return [check_no_compiler_messages arm_neon_ok object {
1265 } "-mfpu=neon -mfloat-abi=softfp"]
1271 # Return 1 is this is an ARM target where -mthumb causes Thumb-1 to be
1274 proc check_effective_target_arm_thumb1_ok { } {
1275 return [check_no_compiler_messages arm_thumb1_ok assembly {
1276 #if !defined(__arm__) || !defined(__thumb__) || defined(__thumb2__)
1282 # Return 1 if the target supports executing NEON instructions, 0
1283 # otherwise. Cache the result.
1285 proc check_effective_target_arm_neon_hw { } {
1286 return [check_runtime arm_neon_hw_available {
1290 long long a = 0, b = 1;
1291 asm ("vorr %P0, %P1, %P2"
1293 : "0" (a), "w" (b));
1296 } "-mfpu=neon -mfloat-abi=softfp"]
1299 # Return 1 if this is a ARM target with NEON enabled.
1301 proc check_effective_target_arm_neon { } {
1302 if { [check_effective_target_arm32] } {
1303 return [check_no_compiler_messages arm_neon object {
1304 #ifndef __ARM_NEON__
1315 # Return 1 if this a Loongson-2E or -2F target using an ABI that supports
1316 # the Loongson vector modes.
1318 proc check_effective_target_mips_loongson { } {
1319 return [check_no_compiler_messages loongson assembly {
1320 #if !defined(__mips_loongson_vector_rev)
1326 # Return 1 if this is a PowerPC target with floating-point registers.
1328 proc check_effective_target_powerpc_fprs { } {
1329 if { [istarget powerpc*-*-*]
1330 || [istarget rs6000-*-*] } {
1331 return [check_no_compiler_messages powerpc_fprs object {
1343 # Return 1 if this is a PowerPC target with hardware double-precision
1346 proc check_effective_target_powerpc_hard_double { } {
1347 if { [istarget powerpc*-*-*]
1348 || [istarget rs6000-*-*] } {
1349 return [check_no_compiler_messages powerpc_hard_double object {
1361 # Return 1 if this is a PowerPC target supporting -maltivec.
1363 proc check_effective_target_powerpc_altivec_ok { } {
1364 if { ([istarget powerpc*-*-*]
1365 && ![istarget powerpc-*-linux*paired*])
1366 || [istarget rs6000-*-*] } {
1367 # AltiVec is not supported on AIX before 5.3.
1368 if { [istarget powerpc*-*-aix4*]
1369 || [istarget powerpc*-*-aix5.1*]
1370 || [istarget powerpc*-*-aix5.2*] } {
1373 return [check_no_compiler_messages powerpc_altivec_ok object {
1381 # Return 1 if this is a PowerPC target that supports SPU.
1383 proc check_effective_target_powerpc_spu { } {
1384 if [istarget powerpc*-*-linux*] {
1385 return [check_effective_target_powerpc_altivec_ok]
1391 # Return 1 if this is a PowerPC target with SPE enabled.
1393 proc check_effective_target_powerpc_spe { } {
1394 if { [istarget powerpc*-*-*] } {
1395 return [check_no_compiler_messages powerpc_spe object {
1407 # Return 1 if this is a PowerPC target with Altivec enabled.
1409 proc check_effective_target_powerpc_altivec { } {
1410 if { [istarget powerpc*-*-*] } {
1411 return [check_no_compiler_messages powerpc_altivec object {
1423 # Return 1 if this is a SPU target with a toolchain that
1424 # supports automatic overlay generation.
1426 proc check_effective_target_spu_auto_overlay { } {
1427 if { [istarget spu*-*-elf*] } {
1428 return [check_no_compiler_messages spu_auto_overlay executable {
1430 } "-Wl,--auto-overlay" ]
1436 # The VxWorks SPARC simulator accepts only EM_SPARC executables and
1437 # chokes on EM_SPARC32PLUS or EM_SPARCV9 executables. Return 1 if the
1438 # test environment appears to run executables on such a simulator.
1440 proc check_effective_target_ultrasparc_hw { } {
1441 return [check_runtime ultrasparc_hw {
1442 int main() { return 0; }
1443 } "-mcpu=ultrasparc"]
1446 # Return 1 if the target supports hardware vector shift operation.
1448 proc check_effective_target_vect_shift { } {
1449 global et_vect_shift_saved
1451 if [info exists et_vect_shift_saved] {
1452 verbose "check_effective_target_vect_shift: using cached result" 2
1454 set et_vect_shift_saved 0
1455 if { ([istarget powerpc*-*-*]
1456 && ![istarget powerpc-*-linux*paired*])
1457 || [istarget ia64-*-*]
1458 || [istarget i?86-*-*]
1459 || [istarget x86_64-*-*]
1460 || [check_effective_target_arm32] } {
1461 set et_vect_shift_saved 1
1465 verbose "check_effective_target_vect_shift: returning $et_vect_shift_saved" 2
1466 return $et_vect_shift_saved
1469 # Return 1 if the target supports hardware vectors of long, 0 otherwise.
1471 # This can change for different subtargets so do not cache the result.
1473 proc check_effective_target_vect_long { } {
1474 if { [istarget i?86-*-*]
1475 || (([istarget powerpc*-*-*]
1476 && ![istarget powerpc-*-linux*paired*])
1477 && [check_effective_target_ilp32])
1478 || [istarget x86_64-*-*]
1479 || [check_effective_target_arm32]
1480 || ([istarget sparc*-*-*] && [check_effective_target_ilp32]) } {
1486 verbose "check_effective_target_vect_long: returning $answer" 2
1490 # Return 1 if the target supports hardware vectors of float, 0 otherwise.
1492 # This won't change for different subtargets so cache the result.
1494 proc check_effective_target_vect_float { } {
1495 global et_vect_float_saved
1497 if [info exists et_vect_float_saved] {
1498 verbose "check_effective_target_vect_float: using cached result" 2
1500 set et_vect_float_saved 0
1501 if { [istarget i?86-*-*]
1502 || [istarget powerpc*-*-*]
1503 || [istarget spu-*-*]
1504 || [istarget mipsisa64*-*-*]
1505 || [istarget x86_64-*-*]
1506 || [istarget ia64-*-*]
1507 || [check_effective_target_arm32] } {
1508 set et_vect_float_saved 1
1512 verbose "check_effective_target_vect_float: returning $et_vect_float_saved" 2
1513 return $et_vect_float_saved
1516 # Return 1 if the target supports hardware vectors of double, 0 otherwise.
1518 # This won't change for different subtargets so cache the result.
1520 proc check_effective_target_vect_double { } {
1521 global et_vect_double_saved
1523 if [info exists et_vect_double_saved] {
1524 verbose "check_effective_target_vect_double: using cached result" 2
1526 set et_vect_double_saved 0
1527 if { [istarget i?86-*-*]
1528 || [istarget x86_64-*-*]
1529 || [istarget spu-*-*] } {
1530 set et_vect_double_saved 1
1534 verbose "check_effective_target_vect_double: returning $et_vect_double_saved" 2
1535 return $et_vect_double_saved
1538 # Return 1 if the target supports hardware vectors of long long, 0 otherwise.
1540 # This won't change for different subtargets so cache the result.
1542 proc check_effective_target_vect_long_long { } {
1543 global et_vect_long_long_saved
1545 if [info exists et_vect_long_long_saved] {
1546 verbose "check_effective_target_vect_long_long: using cached result" 2
1548 set et_vect_long_long_saved 0
1549 if { [istarget i?86-*-*]
1550 || [istarget x86_64-*-*] } {
1551 set et_vect_long_long_saved 1
1555 verbose "check_effective_target_vect_long_long: returning $et_vect_long_long_saved" 2
1556 return $et_vect_long_long_saved
1560 # Return 1 if the target plus current options does not support a vector
1561 # max instruction on "int", 0 otherwise.
1563 # This won't change for different subtargets so cache the result.
1565 proc check_effective_target_vect_no_int_max { } {
1566 global et_vect_no_int_max_saved
1568 if [info exists et_vect_no_int_max_saved] {
1569 verbose "check_effective_target_vect_no_int_max: using cached result" 2
1571 set et_vect_no_int_max_saved 0
1572 if { [istarget sparc*-*-*]
1573 || [istarget spu-*-*]
1574 || [istarget alpha*-*-*] } {
1575 set et_vect_no_int_max_saved 1
1578 verbose "check_effective_target_vect_no_int_max: returning $et_vect_no_int_max_saved" 2
1579 return $et_vect_no_int_max_saved
1582 # Return 1 if the target plus current options does not support a vector
1583 # add instruction on "int", 0 otherwise.
1585 # This won't change for different subtargets so cache the result.
1587 proc check_effective_target_vect_no_int_add { } {
1588 global et_vect_no_int_add_saved
1590 if [info exists et_vect_no_int_add_saved] {
1591 verbose "check_effective_target_vect_no_int_add: using cached result" 2
1593 set et_vect_no_int_add_saved 0
1594 # Alpha only supports vector add on V8QI and V4HI.
1595 if { [istarget alpha*-*-*] } {
1596 set et_vect_no_int_add_saved 1
1599 verbose "check_effective_target_vect_no_int_add: returning $et_vect_no_int_add_saved" 2
1600 return $et_vect_no_int_add_saved
1603 # Return 1 if the target plus current options does not support vector
1604 # bitwise instructions, 0 otherwise.
1606 # This won't change for different subtargets so cache the result.
1608 proc check_effective_target_vect_no_bitwise { } {
1609 global et_vect_no_bitwise_saved
1611 if [info exists et_vect_no_bitwise_saved] {
1612 verbose "check_effective_target_vect_no_bitwise: using cached result" 2
1614 set et_vect_no_bitwise_saved 0
1616 verbose "check_effective_target_vect_no_bitwise: returning $et_vect_no_bitwise_saved" 2
1617 return $et_vect_no_bitwise_saved
1620 # Return 1 if the target plus current options supports vector permutation,
1623 # This won't change for different subtargets so cache the result.
1625 proc check_effective_target_vect_perm { } {
1628 if [info exists et_vect_perm_saved] {
1629 verbose "check_effective_target_vect_perm: using cached result" 2
1631 set et_vect_perm_saved 0
1632 if { [istarget powerpc*-*-*]
1633 || [istarget spu-*-*] } {
1634 set et_vect_perm_saved 1
1637 verbose "check_effective_target_vect_perm: returning $et_vect_perm_saved" 2
1638 return $et_vect_perm_saved
1642 # Return 1 if the target plus current options supports a vector
1643 # widening summation of *short* args into *int* result, 0 otherwise.
1644 # A target can also support this widening summation if it can support
1645 # promotion (unpacking) from shorts to ints.
1647 # This won't change for different subtargets so cache the result.
1649 proc check_effective_target_vect_widen_sum_hi_to_si { } {
1650 global et_vect_widen_sum_hi_to_si
1652 if [info exists et_vect_widen_sum_hi_to_si_saved] {
1653 verbose "check_effective_target_vect_widen_sum_hi_to_si: using cached result" 2
1655 set et_vect_widen_sum_hi_to_si_saved [check_effective_target_vect_unpack]
1656 if { [istarget powerpc*-*-*]
1657 || [istarget ia64-*-*] } {
1658 set et_vect_widen_sum_hi_to_si_saved 1
1661 verbose "check_effective_target_vect_widen_sum_hi_to_si: returning $et_vect_widen_sum_hi_to_si_saved" 2
1662 return $et_vect_widen_sum_hi_to_si_saved
1665 # Return 1 if the target plus current options supports a vector
1666 # widening summation of *char* args into *short* result, 0 otherwise.
1667 # A target can also support this widening summation if it can support
1668 # promotion (unpacking) from chars to shorts.
1670 # This won't change for different subtargets so cache the result.
1672 proc check_effective_target_vect_widen_sum_qi_to_hi { } {
1673 global et_vect_widen_sum_qi_to_hi
1675 if [info exists et_vect_widen_sum_qi_to_hi_saved] {
1676 verbose "check_effective_target_vect_widen_sum_qi_to_hi: using cached result" 2
1678 set et_vect_widen_sum_qi_to_hi_saved 0
1679 if { [check_effective_target_vect_unpack]
1680 || [istarget ia64-*-*] } {
1681 set et_vect_widen_sum_qi_to_hi_saved 1
1684 verbose "check_effective_target_vect_widen_sum_qi_to_hi: returning $et_vect_widen_sum_qi_to_hi_saved" 2
1685 return $et_vect_widen_sum_qi_to_hi_saved
1688 # Return 1 if the target plus current options supports a vector
1689 # widening summation of *char* args into *int* result, 0 otherwise.
1691 # This won't change for different subtargets so cache the result.
1693 proc check_effective_target_vect_widen_sum_qi_to_si { } {
1694 global et_vect_widen_sum_qi_to_si
1696 if [info exists et_vect_widen_sum_qi_to_si_saved] {
1697 verbose "check_effective_target_vect_widen_sum_qi_to_si: using cached result" 2
1699 set et_vect_widen_sum_qi_to_si_saved 0
1700 if { [istarget powerpc*-*-*] } {
1701 set et_vect_widen_sum_qi_to_si_saved 1
1704 verbose "check_effective_target_vect_widen_sum_qi_to_si: returning $et_vect_widen_sum_qi_to_si_saved" 2
1705 return $et_vect_widen_sum_qi_to_si_saved
1708 # Return 1 if the target plus current options supports a vector
1709 # widening multiplication of *char* args into *short* result, 0 otherwise.
1710 # A target can also support this widening multplication if it can support
1711 # promotion (unpacking) from chars to shorts, and vect_short_mult (non-widening
1712 # multiplication of shorts).
1714 # This won't change for different subtargets so cache the result.
1717 proc check_effective_target_vect_widen_mult_qi_to_hi { } {
1718 global et_vect_widen_mult_qi_to_hi
1720 if [info exists et_vect_widen_mult_qi_to_hi_saved] {
1721 verbose "check_effective_target_vect_widen_mult_qi_to_hi: using cached result" 2
1723 if { [check_effective_target_vect_unpack]
1724 && [check_effective_target_vect_short_mult] } {
1725 set et_vect_widen_mult_qi_to_hi_saved 1
1727 set et_vect_widen_mult_qi_to_hi_saved 0
1729 if { [istarget powerpc*-*-*] } {
1730 set et_vect_widen_mult_qi_to_hi_saved 1
1733 verbose "check_effective_target_vect_widen_mult_qi_to_hi: returning $et_vect_widen_mult_qi_to_hi_saved" 2
1734 return $et_vect_widen_mult_qi_to_hi_saved
1737 # Return 1 if the target plus current options supports a vector
1738 # widening multiplication of *short* args into *int* result, 0 otherwise.
1739 # A target can also support this widening multplication if it can support
1740 # promotion (unpacking) from shorts to ints, and vect_int_mult (non-widening
1741 # multiplication of ints).
1743 # This won't change for different subtargets so cache the result.
1746 proc check_effective_target_vect_widen_mult_hi_to_si { } {
1747 global et_vect_widen_mult_hi_to_si
1749 if [info exists et_vect_widen_mult_hi_to_si_saved] {
1750 verbose "check_effective_target_vect_widen_mult_hi_to_si: using cached result" 2
1752 if { [check_effective_target_vect_unpack]
1753 && [check_effective_target_vect_int_mult] } {
1754 set et_vect_widen_mult_hi_to_si_saved 1
1756 set et_vect_widen_mult_hi_to_si_saved 0
1758 if { [istarget powerpc*-*-*]
1759 || [istarget spu-*-*]
1760 || [istarget i?86-*-*]
1761 || [istarget x86_64-*-*] } {
1762 set et_vect_widen_mult_hi_to_si_saved 1
1765 verbose "check_effective_target_vect_widen_mult_hi_to_si: returning $et_vect_widen_mult_hi_to_si_saved" 2
1766 return $et_vect_widen_mult_hi_to_si_saved
1769 # Return 1 if the target plus current options supports a vector
1770 # dot-product of signed chars, 0 otherwise.
1772 # This won't change for different subtargets so cache the result.
1774 proc check_effective_target_vect_sdot_qi { } {
1775 global et_vect_sdot_qi
1777 if [info exists et_vect_sdot_qi_saved] {
1778 verbose "check_effective_target_vect_sdot_qi: using cached result" 2
1780 set et_vect_sdot_qi_saved 0
1782 verbose "check_effective_target_vect_sdot_qi: returning $et_vect_sdot_qi_saved" 2
1783 return $et_vect_sdot_qi_saved
1786 # Return 1 if the target plus current options supports a vector
1787 # dot-product of unsigned chars, 0 otherwise.
1789 # This won't change for different subtargets so cache the result.
1791 proc check_effective_target_vect_udot_qi { } {
1792 global et_vect_udot_qi
1794 if [info exists et_vect_udot_qi_saved] {
1795 verbose "check_effective_target_vect_udot_qi: using cached result" 2
1797 set et_vect_udot_qi_saved 0
1798 if { [istarget powerpc*-*-*] } {
1799 set et_vect_udot_qi_saved 1
1802 verbose "check_effective_target_vect_udot_qi: returning $et_vect_udot_qi_saved" 2
1803 return $et_vect_udot_qi_saved
1806 # Return 1 if the target plus current options supports a vector
1807 # dot-product of signed shorts, 0 otherwise.
1809 # This won't change for different subtargets so cache the result.
1811 proc check_effective_target_vect_sdot_hi { } {
1812 global et_vect_sdot_hi
1814 if [info exists et_vect_sdot_hi_saved] {
1815 verbose "check_effective_target_vect_sdot_hi: using cached result" 2
1817 set et_vect_sdot_hi_saved 0
1818 if { ([istarget powerpc*-*-*] && ![istarget powerpc-*-linux*paired*])
1819 || [istarget i?86-*-*]
1820 || [istarget x86_64-*-*] } {
1821 set et_vect_sdot_hi_saved 1
1824 verbose "check_effective_target_vect_sdot_hi: returning $et_vect_sdot_hi_saved" 2
1825 return $et_vect_sdot_hi_saved
1828 # Return 1 if the target plus current options supports a vector
1829 # dot-product of unsigned shorts, 0 otherwise.
1831 # This won't change for different subtargets so cache the result.
1833 proc check_effective_target_vect_udot_hi { } {
1834 global et_vect_udot_hi
1836 if [info exists et_vect_udot_hi_saved] {
1837 verbose "check_effective_target_vect_udot_hi: using cached result" 2
1839 set et_vect_udot_hi_saved 0
1840 if { ([istarget powerpc*-*-*] && ![istarget powerpc-*-linux*paired*]) } {
1841 set et_vect_udot_hi_saved 1
1844 verbose "check_effective_target_vect_udot_hi: returning $et_vect_udot_hi_saved" 2
1845 return $et_vect_udot_hi_saved
1849 # Return 1 if the target plus current options supports a vector
1850 # demotion (packing) of shorts (to chars) and ints (to shorts)
1851 # using modulo arithmetic, 0 otherwise.
1853 # This won't change for different subtargets so cache the result.
1855 proc check_effective_target_vect_pack_trunc { } {
1856 global et_vect_pack_trunc
1858 if [info exists et_vect_pack_trunc_saved] {
1859 verbose "check_effective_target_vect_pack_trunc: using cached result" 2
1861 set et_vect_pack_trunc_saved 0
1862 if { ([istarget powerpc*-*-*] && ![istarget powerpc-*-linux*paired*])
1863 || [istarget i?86-*-*]
1864 || [istarget x86_64-*-*]
1865 || [istarget spu-*-*] } {
1866 set et_vect_pack_trunc_saved 1
1869 verbose "check_effective_target_vect_pack_trunc: returning $et_vect_pack_trunc_saved" 2
1870 return $et_vect_pack_trunc_saved
1873 # Return 1 if the target plus current options supports a vector
1874 # promotion (unpacking) of chars (to shorts) and shorts (to ints), 0 otherwise.
1876 # This won't change for different subtargets so cache the result.
1878 proc check_effective_target_vect_unpack { } {
1879 global et_vect_unpack
1881 if [info exists et_vect_unpack_saved] {
1882 verbose "check_effective_target_vect_unpack: using cached result" 2
1884 set et_vect_unpack_saved 0
1885 if { ([istarget powerpc*-*-*] && ![istarget powerpc-*paired*])
1886 || [istarget i?86-*-*]
1887 || [istarget x86_64-*-*]
1888 || [istarget spu-*-*] } {
1889 set et_vect_unpack_saved 1
1892 verbose "check_effective_target_vect_unpack: returning $et_vect_unpack_saved" 2
1893 return $et_vect_unpack_saved
1896 # Return 1 if the target plus current options does not guarantee
1897 # that its STACK_BOUNDARY is >= the reguired vector alignment.
1899 # This won't change for different subtargets so cache the result.
1901 proc check_effective_target_unaligned_stack { } {
1902 global et_unaligned_stack_saved
1904 if [info exists et_unaligned_stack_saved] {
1905 verbose "check_effective_target_unaligned_stack: using cached result" 2
1907 set et_unaligned_stack_saved 0
1909 verbose "check_effective_target_unaligned_stack: returning $et_unaligned_stack_saved" 2
1910 return $et_unaligned_stack_saved
1913 # Return 1 if the target plus current options does not support a vector
1914 # alignment mechanism, 0 otherwise.
1916 # This won't change for different subtargets so cache the result.
1918 proc check_effective_target_vect_no_align { } {
1919 global et_vect_no_align_saved
1921 if [info exists et_vect_no_align_saved] {
1922 verbose "check_effective_target_vect_no_align: using cached result" 2
1924 set et_vect_no_align_saved 0
1925 if { [istarget mipsisa64*-*-*]
1926 || [istarget sparc*-*-*]
1927 || [istarget ia64-*-*]
1928 || [check_effective_target_arm32] } {
1929 set et_vect_no_align_saved 1
1932 verbose "check_effective_target_vect_no_align: returning $et_vect_no_align_saved" 2
1933 return $et_vect_no_align_saved
1936 # Return 1 if arrays are aligned to the vector alignment
1937 # boundary, 0 otherwise.
1939 # This won't change for different subtargets so cache the result.
1941 proc check_effective_target_vect_aligned_arrays { } {
1942 global et_vect_aligned_arrays
1944 if [info exists et_vect_aligned_arrays_saved] {
1945 verbose "check_effective_target_vect_aligned_arrays: using cached result" 2
1947 set et_vect_aligned_arrays_saved 0
1948 if { (([istarget x86_64-*-*]
1949 || [istarget i?86-*-*]) && [is-effective-target lp64])
1950 || [istarget spu-*-*] } {
1951 set et_vect_aligned_arrays_saved 1
1954 verbose "check_effective_target_vect_aligned_arrays: returning $et_vect_aligned_arrays_saved" 2
1955 return $et_vect_aligned_arrays_saved
1958 # Return 1 if types of size 32 bit or less are naturally aligned
1959 # (aligned to their type-size), 0 otherwise.
1961 # This won't change for different subtargets so cache the result.
1963 proc check_effective_target_natural_alignment_32 { } {
1964 global et_natural_alignment_32
1966 if [info exists et_natural_alignment_32_saved] {
1967 verbose "check_effective_target_natural_alignment_32: using cached result" 2
1969 # FIXME: 32bit powerpc: guaranteed only if MASK_ALIGN_NATURAL/POWER.
1970 set et_natural_alignment_32_saved 1
1971 if { ([istarget *-*-darwin*] && [is-effective-target lp64]) } {
1972 set et_natural_alignment_32_saved 0
1975 verbose "check_effective_target_natural_alignment_32: returning $et_natural_alignment_32_saved" 2
1976 return $et_natural_alignment_32_saved
1979 # Return 1 if types of size 64 bit or less are naturally aligned (aligned to their
1980 # type-size), 0 otherwise.
1982 # This won't change for different subtargets so cache the result.
1984 proc check_effective_target_natural_alignment_64 { } {
1985 global et_natural_alignment_64
1987 if [info exists et_natural_alignment_64_saved] {
1988 verbose "check_effective_target_natural_alignment_64: using cached result" 2
1990 set et_natural_alignment_64_saved 0
1991 if { ([is-effective-target lp64] && ![istarget *-*-darwin*])
1992 || [istarget spu-*-*] } {
1993 set et_natural_alignment_64_saved 1
1996 verbose "check_effective_target_natural_alignment_64: returning $et_natural_alignment_64_saved" 2
1997 return $et_natural_alignment_64_saved
2000 # Return 1 if vector alignment (for types of size 32 bit or less) is reachable, 0 otherwise.
2002 # This won't change for different subtargets so cache the result.
2004 proc check_effective_target_vector_alignment_reachable { } {
2005 global et_vector_alignment_reachable
2007 if [info exists et_vector_alignment_reachable_saved] {
2008 verbose "check_effective_target_vector_alignment_reachable: using cached result" 2
2010 if { [check_effective_target_vect_aligned_arrays]
2011 || [check_effective_target_natural_alignment_32] } {
2012 set et_vector_alignment_reachable_saved 1
2014 set et_vector_alignment_reachable_saved 0
2017 verbose "check_effective_target_vector_alignment_reachable: returning $et_vector_alignment_reachable_saved" 2
2018 return $et_vector_alignment_reachable_saved
2021 # Return 1 if vector alignment for 64 bit is reachable, 0 otherwise.
2023 # This won't change for different subtargets so cache the result.
2025 proc check_effective_target_vector_alignment_reachable_for_64bit { } {
2026 global et_vector_alignment_reachable_for_64bit
2028 if [info exists et_vector_alignment_reachable_for_64bit_saved] {
2029 verbose "check_effective_target_vector_alignment_reachable_for_64bit: using cached result" 2
2031 if { [check_effective_target_vect_aligned_arrays]
2032 || [check_effective_target_natural_alignment_64] } {
2033 set et_vector_alignment_reachable_for_64bit_saved 1
2035 set et_vector_alignment_reachable_for_64bit_saved 0
2038 verbose "check_effective_target_vector_alignment_reachable_for_64bit: returning $et_vector_alignment_reachable_for_64bit_saved" 2
2039 return $et_vector_alignment_reachable_for_64bit_saved
2042 # Return 1 if the target supports vector conditional operations, 0 otherwise.
2044 proc check_effective_target_vect_condition { } {
2045 global et_vect_cond_saved
2047 if [info exists et_vect_cond_saved] {
2048 verbose "check_effective_target_vect_cond: using cached result" 2
2050 set et_vect_cond_saved 0
2051 if { [istarget powerpc*-*-*]
2052 || [istarget ia64-*-*]
2053 || [istarget i?86-*-*]
2054 || [istarget spu-*-*]
2055 || [istarget x86_64-*-*] } {
2056 set et_vect_cond_saved 1
2060 verbose "check_effective_target_vect_cond: returning $et_vect_cond_saved" 2
2061 return $et_vect_cond_saved
2064 # Return 1 if the target supports vector char multiplication, 0 otherwise.
2066 proc check_effective_target_vect_char_mult { } {
2067 global et_vect_char_mult_saved
2069 if [info exists et_vect_char_mult_saved] {
2070 verbose "check_effective_target_vect_char_mult: using cached result" 2
2072 set et_vect_char_mult_saved 0
2073 if { [istarget ia64-*-*]
2074 || [istarget i?86-*-*]
2075 || [istarget x86_64-*-*] } {
2076 set et_vect_char_mult_saved 1
2080 verbose "check_effective_target_vect_char_mult: returning $et_vect_char_mult_saved" 2
2081 return $et_vect_char_mult_saved
2084 # Return 1 if the target supports vector short multiplication, 0 otherwise.
2086 proc check_effective_target_vect_short_mult { } {
2087 global et_vect_short_mult_saved
2089 if [info exists et_vect_short_mult_saved] {
2090 verbose "check_effective_target_vect_short_mult: using cached result" 2
2092 set et_vect_short_mult_saved 0
2093 if { [istarget ia64-*-*]
2094 || [istarget spu-*-*]
2095 || [istarget i?86-*-*]
2096 || [istarget x86_64-*-*]
2097 || [istarget powerpc*-*-*] } {
2098 set et_vect_short_mult_saved 1
2102 verbose "check_effective_target_vect_short_mult: returning $et_vect_short_mult_saved" 2
2103 return $et_vect_short_mult_saved
2106 # Return 1 if the target supports vector int multiplication, 0 otherwise.
2108 proc check_effective_target_vect_int_mult { } {
2109 global et_vect_int_mult_saved
2111 if [info exists et_vect_int_mult_saved] {
2112 verbose "check_effective_target_vect_int_mult: using cached result" 2
2114 set et_vect_int_mult_saved 0
2115 if { ([istarget powerpc*-*-*] && ![istarget powerpc-*-linux*paired*])
2116 || [istarget spu-*-*]
2117 || [istarget i?86-*-*]
2118 || [istarget x86_64-*-*]
2119 || [check_effective_target_arm32] } {
2120 set et_vect_int_mult_saved 1
2124 verbose "check_effective_target_vect_int_mult: returning $et_vect_int_mult_saved" 2
2125 return $et_vect_int_mult_saved
2128 # Return 1 if the target supports vector even/odd elements extraction, 0 otherwise.
2130 proc check_effective_target_vect_extract_even_odd { } {
2131 global et_vect_extract_even_odd_saved
2133 if [info exists et_vect_extract_even_odd_saved] {
2134 verbose "check_effective_target_vect_extract_even_odd: using cached result" 2
2136 set et_vect_extract_even_odd_saved 0
2137 if { [istarget powerpc*-*-*]
2138 || [istarget spu-*-*] } {
2139 set et_vect_extract_even_odd_saved 1
2143 verbose "check_effective_target_vect_extract_even_odd: returning $et_vect_extract_even_odd_saved" 2
2144 return $et_vect_extract_even_odd_saved
2147 # Return 1 if the target supports vector even/odd elements extraction of
2148 # vectors with SImode elements or larger, 0 otherwise.
2150 proc check_effective_target_vect_extract_even_odd_wide { } {
2151 global et_vect_extract_even_odd_wide_saved
2153 if [info exists et_vect_extract_even_odd_wide_saved] {
2154 verbose "check_effective_target_vect_extract_even_odd_wide: using cached result" 2
2156 set et_vect_extract_even_odd_wide_saved 0
2157 if { [istarget powerpc*-*-*]
2158 || [istarget i?86-*-*]
2159 || [istarget x86_64-*-*]
2160 || [istarget spu-*-*] } {
2161 set et_vect_extract_even_odd_wide_saved 1
2165 verbose "check_effective_target_vect_extract_even_wide_odd: returning $et_vect_extract_even_odd_wide_saved" 2
2166 return $et_vect_extract_even_odd_wide_saved
2169 # Return 1 if the target supports vector interleaving, 0 otherwise.
2171 proc check_effective_target_vect_interleave { } {
2172 global et_vect_interleave_saved
2174 if [info exists et_vect_interleave_saved] {
2175 verbose "check_effective_target_vect_interleave: using cached result" 2
2177 set et_vect_interleave_saved 0
2178 if { [istarget powerpc*-*-*]
2179 || [istarget i?86-*-*]
2180 || [istarget x86_64-*-*]
2181 || [istarget spu-*-*] } {
2182 set et_vect_interleave_saved 1
2186 verbose "check_effective_target_vect_interleave: returning $et_vect_interleave_saved" 2
2187 return $et_vect_interleave_saved
2190 # Return 1 if the target supports vector interleaving and extract even/odd, 0 otherwise.
2191 proc check_effective_target_vect_strided { } {
2192 global et_vect_strided_saved
2194 if [info exists et_vect_strided_saved] {
2195 verbose "check_effective_target_vect_strided: using cached result" 2
2197 set et_vect_strided_saved 0
2198 if { [check_effective_target_vect_interleave]
2199 && [check_effective_target_vect_extract_even_odd] } {
2200 set et_vect_strided_saved 1
2204 verbose "check_effective_target_vect_strided: returning $et_vect_strided_saved" 2
2205 return $et_vect_strided_saved
2208 # Return 1 if the target supports vector interleaving and extract even/odd
2209 # for wide element types, 0 otherwise.
2210 proc check_effective_target_vect_strided_wide { } {
2211 global et_vect_strided_wide_saved
2213 if [info exists et_vect_strided_wide_saved] {
2214 verbose "check_effective_target_vect_strided_wide: using cached result" 2
2216 set et_vect_strided_wide_saved 0
2217 if { [check_effective_target_vect_interleave]
2218 && [check_effective_target_vect_extract_even_odd_wide] } {
2219 set et_vect_strided_wide_saved 1
2223 verbose "check_effective_target_vect_strided_wide: returning $et_vect_strided_wide_saved" 2
2224 return $et_vect_strided_wide_saved
2227 # Return 1 if the target supports section-anchors
2229 proc check_effective_target_section_anchors { } {
2230 global et_section_anchors_saved
2232 if [info exists et_section_anchors_saved] {
2233 verbose "check_effective_target_section_anchors: using cached result" 2
2235 set et_section_anchors_saved 0
2236 if { [istarget powerpc*-*-*] } {
2237 set et_section_anchors_saved 1
2241 verbose "check_effective_target_section_anchors: returning $et_section_anchors_saved" 2
2242 return $et_section_anchors_saved
2245 # Return 1 if the target supports atomic operations on "int" and "long".
2247 proc check_effective_target_sync_int_long { } {
2248 global et_sync_int_long_saved
2250 if [info exists et_sync_int_long_saved] {
2251 verbose "check_effective_target_sync_int_long: using cached result" 2
2253 set et_sync_int_long_saved 0
2254 # This is intentionally powerpc but not rs6000, rs6000 doesn't have the
2255 # load-reserved/store-conditional instructions.
2256 if { [istarget ia64-*-*]
2257 || [istarget i?86-*-*]
2258 || [istarget x86_64-*-*]
2259 || [istarget alpha*-*-*]
2260 || [istarget s390*-*-*]
2261 || [istarget powerpc*-*-*]
2262 || [istarget sparc64-*-*]
2263 || [istarget sparcv9-*-*]
2264 || [istarget mips*-*-*] } {
2265 set et_sync_int_long_saved 1
2269 verbose "check_effective_target_sync_int_long: returning $et_sync_int_long_saved" 2
2270 return $et_sync_int_long_saved
2273 # Return 1 if the target supports atomic operations on "char" and "short".
2275 proc check_effective_target_sync_char_short { } {
2276 global et_sync_char_short_saved
2278 if [info exists et_sync_char_short_saved] {
2279 verbose "check_effective_target_sync_char_short: using cached result" 2
2281 set et_sync_char_short_saved 0
2282 # This is intentionally powerpc but not rs6000, rs6000 doesn't have the
2283 # load-reserved/store-conditional instructions.
2284 if { [istarget ia64-*-*]
2285 || [istarget i?86-*-*]
2286 || [istarget x86_64-*-*]
2287 || [istarget alpha*-*-*]
2288 || [istarget s390*-*-*]
2289 || [istarget powerpc*-*-*]
2290 || [istarget sparc64-*-*]
2291 || [istarget sparcv9-*-*]
2292 || [istarget mips*-*-*] } {
2293 set et_sync_char_short_saved 1
2297 verbose "check_effective_target_sync_char_short: returning $et_sync_char_short_saved" 2
2298 return $et_sync_char_short_saved
2301 # Return 1 if the target uses a ColdFire FPU.
2303 proc check_effective_target_coldfire_fpu { } {
2304 return [check_no_compiler_messages coldfire_fpu assembly {
2311 # Return true if this is a uClibc target.
2313 proc check_effective_target_uclibc {} {
2314 return [check_no_compiler_messages uclibc object {
2315 #include <features.h>
2316 #if !defined (__UCLIBC__)
2322 # Return true if this is a uclibc target and if the uclibc feature
2323 # described by __$feature__ is not present.
2325 proc check_missing_uclibc_feature {feature} {
2326 return [check_no_compiler_messages $feature object "
2327 #include <features.h>
2328 #if !defined (__UCLIBC) || defined (__${feature}__)
2334 # Return true if this is a Newlib target.
2336 proc check_effective_target_newlib {} {
2337 return [check_no_compiler_messages newlib object {
2343 # (a) an error of a few ULP is expected in string to floating-point
2344 # conversion functions; and
2345 # (b) overflow is not always detected correctly by those functions.
2347 proc check_effective_target_lax_strtofp {} {
2348 # By default, assume that all uClibc targets suffer from this.
2349 return [check_effective_target_uclibc]
2352 # Return 1 if this is a target for which wcsftime is a dummy
2353 # function that always returns 0.
2355 proc check_effective_target_dummy_wcsftime {} {
2356 # By default, assume that all uClibc targets suffer from this.
2357 return [check_effective_target_uclibc]
2360 # Return 1 if constructors with initialization priority arguments are
2361 # supposed on this target.
2363 proc check_effective_target_init_priority {} {
2364 return [check_no_compiler_messages init_priority assembly "
2365 void f() __attribute__((constructor (1000)));
2370 # Return 1 if the target matches the effective target 'arg', 0 otherwise.
2371 # This can be used with any check_* proc that takes no argument and
2372 # returns only 1 or 0. It could be used with check_* procs that take
2373 # arguments with keywords that pass particular arguments.
2375 proc is-effective-target { arg } {
2377 if { [info procs check_effective_target_${arg}] != [list] } {
2378 set selected [check_effective_target_${arg}]
2381 "vmx_hw" { set selected [check_vmx_hw_available] }
2382 "named_sections" { set selected [check_named_sections_available] }
2383 "gc_sections" { set selected [check_gc_sections_available] }
2384 "cxa_atexit" { set selected [check_cxa_atexit_available] }
2385 default { error "unknown effective target keyword `$arg'" }
2388 verbose "is-effective-target: $arg $selected" 2
2392 # Return 1 if the argument is an effective-target keyword, 0 otherwise.
2394 proc is-effective-target-keyword { arg } {
2395 if { [info procs check_effective_target_${arg}] != [list] } {
2398 # These have different names for their check_* procs.
2400 "vmx_hw" { return 1 }
2401 "named_sections" { return 1 }
2402 "gc_sections" { return 1 }
2403 "cxa_atexit" { return 1 }
2404 default { return 0 }
2409 # Return 1 if target default to short enums
2411 proc check_effective_target_short_enums { } {
2412 return [check_no_compiler_messages short_enums assembly {
2414 int s[sizeof (enum foo) == 1 ? 1 : -1];
2418 # Return 1 if target supports merging string constants at link time.
2420 proc check_effective_target_string_merging { } {
2421 return [check_no_messages_and_pattern string_merging \
2422 "rodata\\.str" assembly {
2423 const char *var = "String";
2427 # Return 1 if target has the basic signed and unsigned types in
2428 # <stdint.h>, 0 otherwise.
2430 proc check_effective_target_stdint_types { } {
2431 return [check_no_compiler_messages stdint_types assembly {
2433 int8_t a; int16_t b; int32_t c; int64_t d;
2434 uint8_t e; uint16_t f; uint32_t g; uint64_t h;
2438 # Return 1 if programs are intended to be run on a simulator
2439 # (i.e. slowly) rather than hardware (i.e. fast).
2441 proc check_effective_target_simulator { } {
2443 # All "src/sim" simulators set this one.
2444 if [board_info target exists is_simulator] {
2445 return [board_info target is_simulator]
2448 # The "sid" simulators don't set that one, but at least they set
2450 if [board_info target exists slow_simulator] {
2451 return [board_info target slow_simulator]
2457 # Return 1 if the target is a VxWorks kernel.
2459 proc check_effective_target_vxworks_kernel { } {
2460 return [check_no_compiler_messages vxworks_kernel assembly {
2461 #if !defined __vxworks || defined __RTP__
2467 # Return 1 if the target is a VxWorks RTP.
2469 proc check_effective_target_vxworks_rtp { } {
2470 return [check_no_compiler_messages vxworks_rtp assembly {
2471 #if !defined __vxworks || !defined __RTP__
2477 # Return 1 if the target is expected to provide wide character support.
2479 proc check_effective_target_wchar { } {
2480 if {[check_missing_uclibc_feature UCLIBC_HAS_WCHAR]} {
2483 return [check_no_compiler_messages wchar assembly {
2488 # Return 1 if the target has <pthread.h>.
2490 proc check_effective_target_pthread_h { } {
2491 return [check_no_compiler_messages pthread_h assembly {
2492 #include <pthread.h>
2496 # Return 1 if the target can truncate a file from a file-descriptor,
2497 # as used by libgfortran/io/unix.c:fd_truncate; i.e. ftruncate or
2498 # chsize. We test for a trivially functional truncation; no stubs.
2499 # As libgfortran uses _FILE_OFFSET_BITS 64, we do too; it'll cause a
2500 # different function to be used.
2502 proc check_effective_target_fd_truncate { } {
2504 #define _FILE_OFFSET_BITS 64
2510 FILE *f = fopen ("tst.tmp", "wb");
2512 const char t[] = "test writing more than ten characters";
2515 write (fd, t, sizeof (t) - 1);
2517 if (ftruncate (fd, 10) != 0)
2520 f = fopen ("tst.tmp", "rb");
2521 if (fread (s, 1, sizeof (s), f) != 10 || strncmp (s, t, 10) != 0)
2527 if { [check_runtime ftruncate $prog] } {
2531 regsub "ftruncate" $prog "chsize" prog
2532 return [check_runtime chsize $prog]
2535 # Add to FLAGS all the target-specific flags needed to access the c99 runtime.
2537 proc add_options_for_c99_runtime { flags } {
2538 if { [istarget *-*-solaris2*] } {
2539 return "$flags -std=c99"
2541 if { [istarget powerpc-*-darwin*] } {
2542 return "$flags -mmacosx-version-min=10.3"
2547 # Return 1 if the target provides a full C99 runtime.
2549 proc check_effective_target_c99_runtime { } {
2550 return [check_cached_effective_target c99_runtime {
2553 set file [open "$srcdir/gcc.dg/builtins-config.h"]
2554 set contents [read $file]
2557 #ifndef HAVE_C99_RUNTIME
2561 check_no_compiler_messages_nocache c99_runtime assembly \
2562 $contents [add_options_for_c99_runtime ""]
2566 # Return 1 if target wchar_t is at least 4 bytes.
2568 proc check_effective_target_4byte_wchar_t { } {
2569 return [check_no_compiler_messages 4byte_wchar_t object {
2570 int dummy[sizeof (__WCHAR_TYPE__) >= 4 ? 1 : -1];
2574 # Return 1 if the target supports automatic stack alignment.
2576 proc check_effective_target_automatic_stack_alignment { } {
2577 if { [istarget i?86*-*-*]
2578 || [istarget x86_64-*-*] } then {
2585 # Return 1 if avx instructions can be compiled.
2587 proc check_effective_target_avx { } {
2588 return [check_no_compiler_messages avx object {
2589 void _mm256_zeroall (void)
2591 __builtin_ia32_vzeroall ();
2596 # Return 1 if C wchar_t type is compatible with char16_t.
2598 proc check_effective_target_wchar_t_char16_t_compatible { } {
2599 return [check_no_compiler_messages wchar_t_char16_t object {
2601 __CHAR16_TYPE__ *p16 = &wc;
2602 char t[(((__CHAR16_TYPE__) -1) < 0 == ((__WCHAR_TYPE__) -1) < 0) ? 1 : -1];
2606 # Return 1 if C wchar_t type is compatible with char32_t.
2608 proc check_effective_target_wchar_t_char32_t_compatible { } {
2609 return [check_no_compiler_messages wchar_t_char32_t object {
2611 __CHAR32_TYPE__ *p32 = &wc;
2612 char t[(((__CHAR32_TYPE__) -1) < 0 == ((__WCHAR_TYPE__) -1) < 0) ? 1 : -1];
2616 # Return 1 if pow10 function exists.
2618 proc check_effective_target_pow10 { } {
2619 return [check_runtime pow10 {