+sinclude(../config/acx.m4)
+sinclude(../config/accross.m4)
+
dnl See if stdbool.h properly defines bool and true/false.
AC_DEFUN(gcc_AC_HEADER_STDBOOL,
[AC_CACHE_CHECK([for working stdbool.h],
EOF
gcc_cv_prog_adac=no
# Have to do ac_tool_prefix and user overrides by hand.
-user_adac=$ADAC
-user_cc=$CC
-for cand in ${ac_tool_prefix}$user_adac $user_adac \
- ${ac_tool_prefix}$user_cc $user_cc \
+for cand in ${ADAC+"$ADAC"} ${CC+"$CC"} \
${ac_tool_prefix}gcc gcc \
${ac_tool_prefix}cc cc \
${ac_tool_prefix}gnatgcc gnatgcc \
AC_SUBST($1)dnl
])
-# Check whether mmap can map an arbitrary page from /dev/zero or with
-# MAP_ANONYMOUS, without MAP_FIXED.
-AC_DEFUN([AC_FUNC_MMAP_ANYWHERE],
-[AC_CHECK_FUNCS(getpagesize)
-# The test program for the next two tests is the same except for one
-# set of ifdefs.
-changequote({{{,}}})dnl
-{{{cat >ct-mmap.inc <<'EOF'
-#include <sys/types.h>
+# mmap(2) blacklisting. Some platforms provide the mmap library routine
+# but don't support all of the features we need from it.
+AC_DEFUN([gcc_AC_FUNC_MMAP_BLACKLIST],
+[if test $ac_cv_header_sys_mman_h != yes \
+ || test $ac_cv_func_mmap != yes; then
+ gcc_cv_func_mmap_file=no
+ gcc_cv_func_mmap_dev_zero=no
+ gcc_cv_func_mmap_anon=no
+else
+ AC_CACHE_CHECK([whether read-only mmap of a plain file works],
+ gcc_cv_func_mmap_file,
+ [# Add a system to this blacklist if
+ # mmap(0, stat_size, PROT_READ, MAP_PRIVATE, fd, 0) doesn't return a
+ # memory area containing the same data that you'd get if you applied
+ # read() to the same fd. The only system known to have a problem here
+ # is VMS, where text files have record structure.
+ case "$host_os" in
+ vms*)
+ gcc_cv_func_mmap_file=no ;;
+ *)
+ gcc_cv_func_mmap_file=yes;;
+ esac])
+ AC_CACHE_CHECK([whether mmap from /dev/zero works],
+ gcc_cv_func_mmap_dev_zero,
+ [# Add a system to this blacklist if it has mmap() but /dev/zero
+ # does not exist, or if mmapping /dev/zero does not give anonymous
+ # zeroed pages with both the following properties:
+ # 1. If you map N consecutive pages in with one call, and then
+ # unmap any subset of those pages, the pages that were not
+ # explicitly unmapped remain accessible.
+ # 2. If you map two adjacent blocks of memory and then unmap them
+ # both at once, they must both go away.
+ # Systems known to be in this category are Windows (all variants),
+ # VMS, and Darwin.
+ case "$host_os" in
+ vms* | cygwin* | pe | mingw* | darwin*)
+ gcc_cv_func_mmap_dev_zero=no ;;
+ *)
+ gcc_cv_func_mmap_dev_zero=yes;;
+ esac])
+
+ # Unlike /dev/zero, the MAP_ANON(YMOUS) defines can be probed for.
+ AC_CACHE_CHECK([for MAP_ANON(YMOUS)], gcc_cv_decl_map_anon,
+ [AC_TRY_COMPILE(
+[#include <sys/types.h>
#include <sys/mman.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <setjmp.h>
-#include <stdio.h>
-
-#if !defined (MAP_ANONYMOUS) && defined (MAP_ANON)
-# define MAP_ANONYMOUS MAP_ANON
-#endif
-
-/* This mess was copied from the GNU getpagesize.h. */
-#ifndef HAVE_GETPAGESIZE
-# ifdef HAVE_UNISTD_H
-# include <unistd.h>
-# endif
-
-/* Assume that all systems that can run configure have sys/param.h. */
-# ifndef HAVE_SYS_PARAM_H
-# define HAVE_SYS_PARAM_H 1
-# endif
-
-# ifdef _SC_PAGESIZE
-# define getpagesize() sysconf(_SC_PAGESIZE)
-# else /* no _SC_PAGESIZE */
-# ifdef HAVE_SYS_PARAM_H
-# include <sys/param.h>
-# ifdef EXEC_PAGESIZE
-# define getpagesize() EXEC_PAGESIZE
-# else /* no EXEC_PAGESIZE */
-# ifdef NBPG
-# define getpagesize() NBPG * CLSIZE
-# ifndef CLSIZE
-# define CLSIZE 1
-# endif /* no CLSIZE */
-# else /* no NBPG */
-# ifdef NBPC
-# define getpagesize() NBPC
-# else /* no NBPC */
-# ifdef PAGESIZE
-# define getpagesize() PAGESIZE
-# endif /* PAGESIZE */
-# endif /* no NBPC */
-# endif /* no NBPG */
-# endif /* no EXEC_PAGESIZE */
-# else /* no HAVE_SYS_PARAM_H */
-# define getpagesize() 8192 /* punt totally */
-# endif /* no HAVE_SYS_PARAM_H */
-# endif /* no _SC_PAGESIZE */
-
-#endif /* no HAVE_GETPAGESIZE */
-
-#ifndef MAP_FAILED
-# define MAP_FAILED -1
-#endif
+#include <unistd.h>
-#undef perror_exit
-#define perror_exit(str, val) \
- do { perror(str); exit(val); } while (0)
-
-/* Some versions of cygwin mmap require that munmap is called with the
- same parameters as mmap. GCC expects that this is not the case.
- Test for various forms of this problem. Warning - icky signal games. */
-
-static sigset_t unblock_sigsegv;
-static jmp_buf r;
-static size_t pg;
-static int devzero;
-
-static char *
-anonmap (size)
- size_t size;
-{
-#ifdef USE_MAP_ANON
- return (char *) mmap (0, size, PROT_READ|PROT_WRITE,
- MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
-#else
- return (char *) mmap (0, size, PROT_READ|PROT_WRITE,
- MAP_PRIVATE, devzero, 0);
+#ifndef MAP_ANONYMOUS
+#define MAP_ANONYMOUS MAP_ANON
#endif
-}
-
-static void
-sigsegv (unused)
- int unused;
-{
- sigprocmask (SIG_UNBLOCK, &unblock_sigsegv, 0);
- longjmp (r, 1);
-}
-
-/* Basic functionality test. */
-void
-test_0 ()
-{
- char *x = anonmap (pg);
- if (x == (char *) MAP_FAILED)
- perror_exit("test 0 mmap", 2);
-
- *(int *)x += 1;
-
- if (munmap(x, pg) < 0)
- perror_exit("test 0 munmap", 3);
-}
-
-/* 1. If we map a 2-page region and unmap its second page, the first page
- must remain. */
-static void
-test_1 ()
-{
- char *x = anonmap (pg * 2);
- if (x == (char *)MAP_FAILED)
- perror_exit ("test 1 mmap", 4);
-
- signal (SIGSEGV, sigsegv);
- if (setjmp (r))
- perror_exit ("test 1 fault", 5);
-
- x[0] = 1;
- x[pg] = 1;
-
- if (munmap (x + pg, pg) < 0)
- perror_exit ("test 1 munmap 1", 6);
- x[0] = 2;
-
- if (setjmp (r) == 0)
- {
- x[pg] = 1;
- perror_exit ("test 1 no fault", 7);
- }
- if (munmap (x, pg) < 0)
- perror_exit ("test 1 munmap 2", 8);
-}
-
-/* 2. If we map a 2-page region and unmap its first page, the second
- page must remain. */
-static void
-test_2 ()
-{
- char *x = anonmap (pg * 2);
- if (x == (char *)MAP_FAILED)
- perror_exit ("test 2 mmap", 9);
-
- signal (SIGSEGV, sigsegv);
- if (setjmp (r))
- perror_exit ("test 2 fault", 10);
-
- x[0] = 1;
- x[pg] = 1;
-
- if (munmap (x, pg) < 0)
- perror_exit ("test 2 munmap 1", 11);
-
- x[pg] = 2;
-
- if (setjmp (r) == 0)
- {
- x[0] = 1;
- perror_exit ("test 2 no fault", 12);
- }
-
- if (munmap (x+pg, pg) < 0)
- perror_exit ("test 2 munmap 2", 13);
-}
-
-/* 3. If we map two adjacent 1-page regions and unmap them both with
- one munmap, both must go away.
-
- Getting two adjacent 1-page regions with two mmap calls is slightly
- tricky. All OS's tested skip over already-allocated blocks; therefore
- we have been careful to unmap all allocated regions in previous tests.
- HP/UX allocates pages backward in memory. No OS has yet been observed
- to be so perverse as to leave unmapped space between consecutive calls
- to mmap. */
-
-static void
-test_3 ()
-{
- char *x, *y, *z;
-
- x = anonmap (pg);
- if (x == (char *)MAP_FAILED)
- perror_exit ("test 3 mmap 1", 14);
- y = anonmap (pg);
- if (y == (char *)MAP_FAILED)
- perror_exit ("test 3 mmap 2", 15);
-
- if (y != x + pg)
- {
- if (y == x - pg)
- z = y, y = x, x = z;
- else
- {
- fprintf (stderr, "test 3 nonconsecutive pages - %lx, %lx\n",
- (unsigned long)x, (unsigned long)y);
- exit (16);
- }
- }
-
- signal (SIGSEGV, sigsegv);
- if (setjmp (r))
- perror_exit ("test 3 fault", 17);
-
- x[0] = 1;
- y[0] = 1;
-
- if (munmap (x, pg*2) < 0)
- perror_exit ("test 3 munmap", 18);
-
- if (setjmp (r) == 0)
- {
- x[0] = 1;
- perror_exit ("test 3 no fault 1", 19);
- }
-
- signal (SIGSEGV, sigsegv);
- if (setjmp (r) == 0)
- {
- y[0] = 1;
- perror_exit ("test 3 no fault 2", 20);
- }
-}
-
-int
-main ()
-{
- sigemptyset (&unblock_sigsegv);
- sigaddset (&unblock_sigsegv, SIGSEGV);
- pg = getpagesize ();
-#ifndef USE_MAP_ANON
- devzero = open ("/dev/zero", O_RDWR);
- if (devzero < 0)
- perror_exit ("open /dev/zero", 1);
-#endif
-
- test_0();
- test_1();
- test_2();
- test_3();
-
- exit(0);
-}
-EOF}}}
-changequote([,])dnl
-
-AC_CACHE_CHECK(for working mmap from /dev/zero,
- ac_cv_func_mmap_dev_zero,
-[AC_TRY_RUN(
- [#include "ct-mmap.inc"],
- ac_cv_func_mmap_dev_zero=yes,
- [if test $? -lt 4
- then ac_cv_func_mmap_dev_zero=no
- else ac_cv_func_mmap_dev_zero=buggy
- fi],
- # If this is not cygwin, and /dev/zero is a character device, it's probably
- # safe to assume it works.
- [case "$host_os" in
- cygwin* | win32 | pe | mingw* ) ac_cv_func_mmap_dev_zero=buggy ;;
- * ) if test -c /dev/zero
- then ac_cv_func_mmap_dev_zero=yes
- else ac_cv_func_mmap_dev_zero=no
- fi ;;
- esac])
-])
-if test $ac_cv_func_mmap_dev_zero = yes; then
- AC_DEFINE(HAVE_MMAP_DEV_ZERO, 1,
- [Define if mmap can get us zeroed pages from /dev/zero.])
-fi
-
-AC_CACHE_CHECK([for working mmap with MAP_ANON(YMOUS)],
- ac_cv_func_mmap_anon,
-[AC_TRY_RUN(
- [#define USE_MAP_ANON
-#include "ct-mmap.inc"],
- ac_cv_func_mmap_anon=yes,
- [if test $? -lt 4
- then ac_cv_func_mmap_anon=no
- else ac_cv_func_mmap_anon=buggy
- fi],
- # Unlike /dev/zero, it is not safe to assume MAP_ANON(YMOUS) works
- # just because it's there. Some SCO Un*xen define it but don't implement it.
- ac_cv_func_mmap_anon=no)
-])
-if test $ac_cv_func_mmap_anon = yes; then
- AC_DEFINE(HAVE_MMAP_ANON, 1,
- [Define if mmap can get us zeroed pages using MAP_ANON(YMOUS).])
+],
+[int n = MAP_ANONYMOUS;],
+ gcc_cv_decl_map_anon=yes,
+ gcc_cv_decl_map_anon=no)])
+
+ if test $gcc_cv_decl_map_anon = no; then
+ gcc_cv_func_mmap_anon=no
+ else
+ AC_CACHE_CHECK([whether mmap with MAP_ANON(YMOUS) works],
+ gcc_cv_func_mmap_anon,
+ [# Add a system to this blacklist if it has mmap() and MAP_ANON or
+ # MAP_ANONYMOUS, but using mmap(..., MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
+ # doesn't give anonymous zeroed pages with the same properties listed
+ # above for use of /dev/zero.
+ # Systems known to be in this category are Windows, VMS, and SCO Unix.
+ case "$host_os" in
+ vms* | cygwin* | pe | mingw* | sco* | udk* )
+ gcc_cv_func_mmap_anon=no ;;
+ *)
+ gcc_cv_func_mmap_anon=yes;;
+ esac])
+ fi
fi
-rm -f ct-mmap.inc
-])
-
-# Check whether mmap can map a plain file, without MAP_FIXED.
-AC_DEFUN([AC_FUNC_MMAP_FILE],
-[AC_CACHE_CHECK(for working mmap of a file, ac_cv_func_mmap_file,
-[# Create a file one thousand bytes long.
-for i in 1 2 3 4 5 6 7 8 9 0
-do for j in 1 2 3 4 5 6 7 8 9 0
-do echo $i $j xxxxx
-done
-done > conftestdata$$
-
-AC_TRY_RUN([
-/* Test by Zack Weinberg. Modified from MMAP_ANYWHERE test by
- Richard Henderson and Alexandre Oliva.
- Check whether read-only mmap of a plain file works. */
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <sys/mman.h>
-
-int main()
-{
- char *x;
- int fd;
- struct stat st;
- fd = open("conftestdata$$", O_RDONLY);
- if (fd < 0)
- exit(1);
-
- if (fstat (fd, &st))
- exit(2);
-
- x = (char*)mmap(0, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
- if (x == (char *) -1)
- exit(3);
-
- if (x[0] != '1' || x[1] != ' ' || x[2] != '1' || x[3] != ' ')
- exit(4);
-
- if (munmap(x, st.st_size) < 0)
- exit(5);
-
- exit(0);
-}], ac_cv_func_mmap_file=yes, ac_cv_func_mmap_file=no,
-ac_cv_func_mmap_file=no)])
-if test $ac_cv_func_mmap_file = yes; then
+if test $gcc_cv_func_mmap_file = yes; then
AC_DEFINE(HAVE_MMAP_FILE, 1,
[Define if read-only mmap of a plain file works.])
fi
+if test $gcc_cv_func_mmap_dev_zero = yes; then
+ AC_DEFINE(HAVE_MMAP_DEV_ZERO, 1,
+ [Define if mmap of /dev/zero works.])
+fi
+if test $gcc_cv_func_mmap_anon = yes; then
+ AC_DEFINE(HAVE_MMAP_ANON, 1,
+ [Define if mmap with MAP_ANON(YMOUS) works.])
+fi
])
dnl Locate a program and check that its version is acceptable.
[Define if enumerated bitfields are treated as unsigned values.])
fi])
-dnl Host type sizes probe.
-dnl By Kaveh R. Ghazi. One typo fixed since.
-dnl
-AC_DEFUN([gcc_AC_COMPILE_CHECK_SIZEOF],
-[changequote(<<, >>)dnl
-dnl The name to #define.
-define(<<AC_TYPE_NAME>>, translit(sizeof_$1, [a-z *], [A-Z_P]))dnl
-dnl The cache variable name.
-define(<<AC_CV_NAME>>, translit(ac_cv_sizeof_$1, [ *], [_p]))dnl
-changequote([, ])dnl
-AC_MSG_CHECKING(size of $1)
-AC_CACHE_VAL(AC_CV_NAME,
-[for ac_size in 4 8 1 2 16 $3 ; do # List sizes in rough order of prevalence.
- AC_TRY_COMPILE([#include "confdefs.h"
-#include <sys/types.h>
-$2
-], [switch (0) case 0: case (sizeof ($1) == $ac_size):;], AC_CV_NAME=$ac_size)
- if test x$AC_CV_NAME != x ; then break; fi
-done
-])
-if test x$AC_CV_NAME = x ; then
- AC_MSG_ERROR([cannot determine a size for $1])
-fi
-AC_MSG_RESULT($AC_CV_NAME)
-AC_DEFINE_UNQUOTED(AC_TYPE_NAME, $AC_CV_NAME, [The number of bytes in type $1])
-undefine([AC_TYPE_NAME])dnl
-undefine([AC_CV_NAME])dnl
-])
-
dnl Probe number of bits in a byte.
dnl Note C89 requires CHAR_BIT >= 8.
dnl
[Define if the host execution character set is EBCDIC.])
fi])
-dnl Utility macro used by next two tests.
-dnl AC_EXAMINE_OBJECT(C source code,
-dnl commands examining object file,
-dnl [commands to run if compile failed]):
-dnl
-dnl Compile the source code to an object file; then convert it into a
-dnl printable representation. All unprintable characters and
-dnl asterisks (*) are replaced by dots (.). All white space is
-dnl deleted. Newlines (ASCII 0x10) in the input are preserved in the
-dnl output, but runs of newlines are compressed to a single newline.
-dnl Finally, line breaks are forcibly inserted so that no line is
-dnl longer than 80 columns and the file ends with a newline. The
-dnl result of all this processing is in the file conftest.dmp, which
-dnl may be examined by the commands in the second argument.
-dnl
-AC_DEFUN([gcc_AC_EXAMINE_OBJECT],
-[AC_LANG_SAVE
-AC_LANG_C
-dnl Next bit cribbed from AC_TRY_COMPILE.
-cat > conftest.$ac_ext <<EOF
-[#line __oline__ "configure"
-#include "confdefs.h"
-$1
-]EOF
-if AC_TRY_EVAL(ac_compile); then
- od -c conftest.o |
- sed ['s/^[0-7]*[ ]*/ /
- s/\*/./g
- s/ \\n/*/g
- s/ [0-9][0-9][0-9]/./g
- s/ \\[^ ]/./g'] |
- tr -d '
- ' | tr -s '*' '
-' | fold | sed '$a\
-' > conftest.dmp
- $2
-ifelse($3, , , else
- $3
-)dnl
-fi
-rm -rf conftest*
-AC_LANG_RESTORE])
-
-dnl Host endianness probe.
-dnl This tests byte-within-word endianness. GCC actually needs
-dnl to know word-within-larger-object endianness. They are the
-dnl same on all presently supported hosts.
-dnl Differs from AC_C_BIGENDIAN in that it does not require
-dnl running a program on the host, and it defines the macro we
-dnl want to see.
-dnl
-AC_DEFUN([gcc_AC_C_COMPILE_ENDIAN],
-[AC_CACHE_CHECK(byte ordering, ac_cv_c_compile_endian,
-[ac_cv_c_compile_endian=unknown
-gcc_AC_EXAMINE_OBJECT([
-#ifdef HAVE_LIMITS_H
-# include <limits.h>
-#endif
-/* This structure must have no internal padding. */
- struct {
- char prefix[sizeof "\nendian:" - 1];
- short word;
- char postfix[2];
- } tester = {
- "\nendian:",
-#if SIZEOF_SHORT == 4
- ('A' << (CHAR_BIT * 3)) | ('B' << (CHAR_BIT * 2)) |
-#endif
- ('A' << CHAR_BIT) | 'B',
- 'X', '\n'
-};],
- [if grep 'endian:AB' conftest.dmp >/dev/null 2>&1; then
- ac_cv_c_compile_endian=big-endian
- elif grep 'endian:BA' conftest.dmp >/dev/null 2>&1; then
- ac_cv_c_compile_endian=little-endian
- fi])
-])
-if test $ac_cv_c_compile_endian = unknown; then
- AC_MSG_ERROR([*** unable to determine endianness])
-elif test $ac_cv_c_compile_endian = big-endian; then
- AC_DEFINE(HOST_WORDS_BIG_ENDIAN, 1,
- [Define if the host machine stores words of multi-word integers in
- big-endian order.])
-fi
-])
-
-dnl Floating point format probe.
-dnl The basic concept is the same as the above: grep the object
-dnl file for an interesting string. We have to watch out for
-dnl rounding changing the values in the object, however; this is
-dnl handled by ignoring the least significant byte of the float.
-dnl
-dnl Does not know about VAX G-float or C4x idiosyncratic format.
-dnl It does know about PDP-10 idiosyncratic format, but this is
-dnl not presently supported by GCC. S/390 "binary floating point"
-dnl is in fact IEEE (but maybe we should have that in EBCDIC as well
-dnl as ASCII?)
-dnl
-AC_DEFUN([gcc_AC_C_FLOAT_FORMAT],
-[AC_CACHE_CHECK(floating point format, ac_cv_c_float_format,
-[gcc_AC_EXAMINE_OBJECT(
-[/* This will not work unless sizeof(double) == 8. */
-extern char sizeof_double_must_be_8 [sizeof(double) == 8 ? 1 : -1];
-
-/* This structure must have no internal padding. */
-struct possibility {
- char prefix[8];
- double candidate;
- char postfix[8];
-};
-
-#define C(cand) { "\nformat:", cand, ":tamrof\n" }
-struct possibility table [] =
-{
- C( 3.25724264705901305206e+01), /* @@IEEEFP - IEEE 754 */
- C( 3.53802595280598432000e+18), /* D__float - VAX */
- C( 5.32201830133125317057e-19), /* D.PDP-10 - PDP-10 - the dot is 0x13a */
- C( 1.77977764695171661377e+10), /* IBMHEXFP - s/390 format, ascii */
- C(-5.22995989424860458374e+10) /* IBMHEXFP - s/390 format, EBCDIC */
-};],
- [if grep 'format:.@IEEEF.:tamrof' conftest.dmp >/dev/null 2>&1; then
- ac_cv_c_float_format='IEEE (big-endian)'
- elif grep 'format:.I@@PFE.:tamrof' conftest.dmp >/dev/null 2>&1; then
- ac_cv_c_float_format='IEEE (big-endian)'
- elif grep 'format:.FEEEI@.:tamrof' conftest.dmp >/dev/null 2>&1; then
- ac_cv_c_float_format='IEEE (little-endian)'
- elif grep 'format:.EFP@@I.:tamrof' conftest.dmp >/dev/null 2>&1; then
- ac_cv_c_float_format='IEEE (little-endian)'
- elif grep 'format:.__floa.:tamrof' conftest.dmp >/dev/null 2>&1; then
- ac_cv_c_float_format='VAX D-float'
- elif grep 'format:..PDP-1.:tamrof' conftest.dmp >/dev/null 2>&1; then
- ac_cv_c_float_format='PDP-10'
- elif grep 'format:.BMHEXF.:tamrof' conftest.dmp >/dev/null 2>&1; then
- ac_cv_c_float_format='IBM 370 hex'
- else
- AC_MSG_ERROR(Unknown floating point format)
- fi],
- [AC_MSG_ERROR(compile failed)])
-])
-# IEEE is the default format. If the float endianness isn't the same
-# as the integer endianness, we have to set FLOAT_WORDS_BIG_ENDIAN
-# (which is a tristate: yes, no, default). This is only an issue with
-# IEEE; the other formats are only supported by a few machines each,
-# all with the same endianness.
-format=
-fbigend=
-case $ac_cv_c_float_format in
- 'IEEE (big-endian)' )
- if test $ac_cv_c_compile_endian = little-endian; then
- fbigend=1
- fi
- ;;
- 'IEEE (little-endian)' )
- if test $ac_cv_c_compile_endian = big-endian; then
- fbigend=0
- fi
- ;;
- 'VAX D-float' )
- format=VAX_FLOAT_FORMAT
- ;;
- 'PDP-10' )
- format=PDP10_FLOAT_FORMAT
- ;;
- 'IBM 370 hex' )
- format=IBM_FLOAT_FORMAT
- ;;
-esac
-if test -n "$format"; then
- AC_DEFINE_UNQUOTED(HOST_FLOAT_FORMAT, $format,
- [Define to the floating point format of the host machine, if not IEEE.])
-fi
-if test -n "$fbigend"; then
- AC_DEFINE_UNQUOTED(HOST_FLOAT_WORDS_BIG_ENDIAN, $fbigend,
- [Define to 1 if the host machine stores floating point numbers in
- memory with the word containing the sign bit at the lowest address,
- or to 0 if it does it the other way around.
-
- This macro should not be defined if the ordering is the same as for
- multi-word integers.])
-fi
-])
-
#serial AM2
dnl From Bruno Haible.
])
AC_DEFUN(gcc_AC_INITFINI_ARRAY,
-[AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
- gcc_cv_initfinit_array, [dnl
- cat > conftest.c <<EOF
+[AC_ARG_ENABLE(initfini-array,
+ [ --enable-initfini-array use .init_array/.fini_array sections],
+ [], [
+AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
+ gcc_cv_initfini_array, [dnl
+ AC_TRY_RUN([
static int x = -1;
int main (void) { return x; }
int foo (void) { x = 0; }
-int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
-EOF
- if AC_TRY_COMMAND([${CC-cc} -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
- then
- if ./conftest; then
- gcc_cv_initfinit_array=yes
- else
- gcc_cv_initfinit_array=no
- fi
- else
- gcc_cv_initfinit_array=no
+int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;],
+ [gcc_cv_initfini_array=yes], [gcc_cv_initfini_array=no],
+ [gcc_cv_initfini_array=no])])
+ enable_initfini_array=$gcc_cv_initfini_array
+])
+if test $enable_initfini_array = yes; then
+ AC_DEFINE(HAVE_INITFINI_ARRAY, 1,
+ [Define .init_array/.fini_array sections are available and working.])
+fi])
+
+dnl # _gcc_COMPUTE_GAS_VERSION
+dnl # Used by gcc_GAS_VERSION_GTE_IFELSE
+dnl #
+dnl # WARNING:
+dnl # gcc_cv_as_gas_srcdir must be defined before this.
+dnl # This gross requirement will go away eventually.
+AC_DEFUN([_gcc_COMPUTE_GAS_VERSION],
+[gcc_cv_as_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
+for f in $gcc_cv_as_bfd_srcdir/configure \
+ $gcc_cv_as_gas_srcdir/configure \
+ $gcc_cv_as_gas_srcdir/configure.in \
+ $gcc_cv_as_gas_srcdir/Makefile.in ; do
+ gcc_cv_gas_version=`grep '^VERSION=[[0-9]]*\.[[0-9]]*' $f`
+ if test x$gcc_cv_gas_version != x; then
+ break
fi
- rm -f conftest*])
- AC_SUBST(gcc_cv_initfinit_array)
- if test $gcc_cv_initfinit_array = yes; then
- AC_DEFINE(HAVE_INITFINI_ARRAY, 1,
- [Define .init_array/.fini_array sections are available and working.])
- fi])
+done
+gcc_cv_gas_major_version=`expr "$gcc_cv_gas_version" : "VERSION=\([[0-9]]*\)"`
+gcc_cv_gas_minor_version=`expr "$gcc_cv_gas_version" : "VERSION=[[0-9]]*\.\([[0-9]]*\)"`
+gcc_cv_gas_patch_version=`expr "$gcc_cv_gas_version" : "VERSION=[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)"`
+]) []dnl # _gcc_COMPUTE_GAS_VERSION
+
+dnl # gcc_GAS_VERSION_GTE_IFELSE(major, minor, patchlevel,
+dnl # [command_if_true = :], [command_if_false = :])
+dnl # Check to see if the version of GAS is greater than or
+dnl # equal to the specified version.
+dnl #
+dnl # The first ifelse() shortens the shell code if the patchlevel
+dnl # is unimportant (the usual case). The others handle missing
+dnl # commands. Note that the tests are structured so that the most
+dnl # common version number cases are tested first.
+AC_DEFUN([gcc_GAS_VERSION_GTE_IFELSE],
+[AC_REQUIRE([_gcc_COMPUTE_GAS_VERSION]) []dnl
+ifelse([$3],[0],
+[if test $gcc_cv_gas_major_version -eq $1 \
+&& test $gcc_cv_gas_minor_version -ge $2 \
+|| test $gcc_cv_gas_major_version -gt $1 ; then
+],
+[if test $gcc_cv_gas_major_version -eq $1 \
+&& (test $gcc_cv_gas_minor_version -gt $2 \
+ || (test $gcc_cv_gas_minor_version -eq $2 \
+ && test $gcc_cv_gas_patch_version -ge $3 )) \
+|| test $gcc_cv_gas_major_version -gt $1 ; then
+])
+ifelse([$4],[],[:],[$4])
+ifelse([$5],[],[],[else $5])
+fi
+]) []dnl # gcc_GAS_VERSION_GTE_IFELSE
+
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