1 dnl Process this file with autoconf to produce a configure script.
3 sinclude(../config/enable.m4)
4 sinclude(../config/tls.m4)
5 sinclude(../config/acx.m4)
6 sinclude(../config/no-executables.m4)
7 sinclude(../config/lib-ld.m4)
8 sinclude(../config/override.m4)
9 sinclude(../config/picflag.m4)
10 sinclude(../config/dfp.m4)
11 sinclude(../config/unwind_ipinfo.m4)
14 AC_INIT([GNU C Runtime Library], 1.0,,[libgcc])
15 AC_CONFIG_SRCDIR([static-object.mk])
17 # The libgcc should not depend on any header files
18 AC_DEFUN([_AC_INCLUDES_DEFAULT_REQUIREMENTS],
19 [m4_divert_text([DEFAULTS],
20 [ac_includes_default='/* none */'])])
22 AC_ARG_WITH(target-subdir,
23 [ --with-target-subdir=SUBDIR Configuring in a subdirectory for target])
24 AC_ARG_WITH(cross-host,
25 [ --with-cross-host=HOST Configuring with a cross compiler])
27 [ --with-ld arrange to use the specified ld (full pathname)])
29 if test "${srcdir}" = "."; then
30 if test -n "${with_build_subdir}"; then
31 libgcc_topdir="${srcdir}/../.."
33 elif test -z "${with_target_subdir}"; then
34 libgcc_topdir="${srcdir}/.."
36 if test "${with_target_subdir}" != "."; then
37 libgcc_topdir="${srcdir}/${with_multisrctop}../.."
39 libgcc_topdir="${srcdir}/${with_multisrctop}.."
43 libgcc_topdir="${srcdir}/.."
45 AC_SUBST(libgcc_topdir)
46 AC_CONFIG_AUX_DIR($libgcc_topdir)
49 [ --disable-shared don't provide a shared libgcc],
51 case $enable_shared in
55 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
56 for pkg in $enableval; do
57 if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
64 ], [enable_shared=yes])
65 AC_SUBST(enable_shared)
70 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
71 AC_ARG_ENABLE(version-specific-runtime-libs,
72 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
74 yes) version_specific_libs=yes ;;
75 no) version_specific_libs=no ;;
76 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
78 [version_specific_libs=no])
79 AC_MSG_RESULT($version_specific_libs)
82 [ --with-slibdir=DIR shared libraries in DIR [LIBDIR]],
83 slibdir="$with_slibdir",
84 if test "${version_specific_libs}" = yes; then
85 slibdir='$(libsubdir)'
86 elif test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
87 slibdir='$(exec_prefix)/$(host_noncanonical)/lib'
93 # Command-line options.
94 # Very limited version of AC_MAINTAINER_MODE.
95 AC_ARG_ENABLE([maintainer-mode],
96 [AC_HELP_STRING([--enable-maintainer-mode],
97 [enable make rules and dependencies not useful (and
98 sometimes confusing) to the casual installer])],
99 [case ${enable_maintainer_mode} in
102 *) AC_MSG_ERROR([--enable-maintainer-mode must be yes or no]) ;;
104 maintainer_mode=${enableval}],
111 # We need awk; bail out if it's missing.
113 "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
117 ACX_NONCANONICAL_HOST
118 ACX_NONCANONICAL_TARGET
121 # Calculate toolexeclibdir
122 # Also toolexecdir, though it's only used in toolexeclibdir
123 case ${version_specific_libs} in
125 # Need the gcc compiler version to know where to install libraries
126 # and header files if --enable-version-specific-runtime-libs option
128 toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
129 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
132 if test -n "$with_cross_host" &&
133 test x"$with_cross_host" != x"no"; then
134 # Install a library built with a cross compiler in tooldir, not libdir.
135 toolexecdir='$(exec_prefix)/$(target_noncanonical)'
136 toolexeclibdir='$(toolexecdir)/lib'
138 toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
139 toolexeclibdir='$(libdir)'
141 multi_os_directory=`$CC -print-multi-os-directory`
142 case $multi_os_directory in
143 .) ;; # Avoid trailing /.
144 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
148 AC_SUBST(toolexecdir)
149 AC_SUBST(toolexeclibdir)
151 dnl These must be called before AM_PROG_LIBTOOL, because it may want
152 dnl to call AC_CHECK_PROG.
153 AC_CHECK_TOOL(AR, ar)
154 AC_CHECK_TOOL(LIPO, lipo, :)
155 AC_CHECK_TOOL(NM, nm)
156 AC_CHECK_TOOL(RANLIB, ranlib, :)
157 AC_CHECK_TOOL(STRIP, strip, :)
164 AC_CHECK_SIZEOF([double])
165 AC_CHECK_SIZEOF([long double])
166 AS_VAR_ARITH([double_type_size], [$ac_cv_sizeof_double \* 8])
167 AS_VAR_ARITH([long_double_type_size], [$ac_cv_sizeof_long_double \* 8])
168 AC_SUBST(double_type_size)
169 AC_SUBST(long_double_type_size)
171 # Check for decimal float support.
172 AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp],
173 [AC_COMPILE_IFELSE([_Decimal32 x;], [libgcc_cv_dfp=yes],
174 [libgcc_cv_dfp=no])])
175 decimal_float=$libgcc_cv_dfp
176 AC_SUBST(decimal_float)
178 GCC_AC_ENABLE_DECIMAL_FLOAT([$host])
180 # Check for fixed-point support.
181 AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point],
182 [AC_COMPILE_IFELSE([_Sat _Fract x;], [libgcc_cv_fixed_point=yes],
183 [libgcc_cv_fixed_point=no])])
184 fixed_point=$libgcc_cv_fixed_point
185 AC_SUBST(fixed_point)
187 # For platforms with the unwind ABI which includes an unwind library,
188 # libunwind, we can choose to use the system libunwind.
189 # config.gcc also contains tests of with_system_libunwind.
190 GCC_CHECK_UNWIND_GETIPINFO
192 # The sjlj test is almost duplicated here and in libgo/configure.ac (for C),
193 # libstdc++-v3/acinclude.m4 and libjava/configure.ac (for C++), and
194 # libobjc/configure.ac (for Objective-C).
195 # FIXME: This should be centralized in config/sjlj.m4.
196 AC_ARG_ENABLE(sjlj-exceptions,
197 AC_HELP_STRING([--enable-sjlj-exceptions],
198 [force use of builtin_setjmp for exceptions]),
199 [case "$enableval" in
201 *) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;;
203 [enable_sjlj_exceptions=auto])
205 AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions],
206 [libgcc_cv_lib_sjlj_exceptions],
213 int i __attribute__ ((cleanup (clean)));
218 CFLAGS="--save-temps -fexceptions"
219 libgcc_cv_lib_sjlj_exceptions=unknown
220 AS_IF([ac_fn_c_try_compile],
221 [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
222 libgcc_cv_lib_sjlj_exceptions=yes
223 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
224 libgcc_cv_lib_sjlj_exceptions=no
230 if test "$enable_sjlj_exceptions" = "auto"; then
231 enable_sjlj_exceptions=$libgcc_cv_lib_sjlj_exceptions
234 case $enable_sjlj_exceptions in
236 AC_DEFINE(LIBGCC_SJLJ_EXCEPTIONS, 1,
237 [Define if the C compiler is configured for setjmp/longjmp exceptions.])
242 AC_MSG_ERROR([unable to detect exception model])
248 AC_MSG_CHECKING([for thread model used by GCC])
249 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
250 AC_MSG_RESULT([$target_thread_file])
252 # Check for assembler CFI support.
253 AC_CACHE_CHECK([whether assembler supports CFI directives], [libgcc_cv_cfi],
258 .cfi_personality 0, symbol\n\
261 [libgcc_cv_cfi=no])])
263 # Check 32bit or 64bit
264 cat > conftest.c <<EOF
265 #if defined(__x86_64__) || (!defined(__i386__) && defined(__LP64__))
271 eval `${CC-cc} -E conftest.c | grep host_address=`
274 # Collect host-machine-specific information.
275 . ${srcdir}/config.host
277 # Check if Solaris/x86 linker supports ZERO terminator unwind entries.
278 # This is after config.host so we can augment tmake_file.
279 # Link with -nostartfiles -nodefaultlibs since neither are present while
282 i?86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
283 cat > conftest.s <<EOF
284 .section .eh_frame,"a",@unwind
286 .section .jcr,"aw",@progbits
289 if AC_TRY_COMMAND(${CC-cc} -shared -nostartfiles -nodefaultlibs -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD); then
290 tmake_file="${tmake_file} i386/t-crtstuff"
295 # Check for visibility support. This is after config.host so that
296 # we can check for asm_hidden_op.
297 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
298 libgcc_cv_hidden_visibility_attribute, [
299 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c
300 libgcc_cv_hidden_visibility_attribute=no
301 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
302 if grep "\\$asm_hidden_op.*foo" conftest.s >/dev/null; then
303 libgcc_cv_hidden_visibility_attribute=yes
309 if test $libgcc_cv_hidden_visibility_attribute = yes; then
310 vis_hide='-fvisibility=hidden -DHIDE_EXPORTS'
316 # See if we have thread-local storage. We can only test assembler
317 # sicne link-time and run-time tests require the newly built
318 # gcc, which can't be used to build executable due to that libgcc
319 # is yet to be built here.
322 if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then
323 set_have_cc_tls="-DHAVE_CC_TLS"
325 AC_SUBST(set_have_cc_tls)
327 # See if we have emulated thread-local storage.
330 if test "$enable_tls $gcc_cv_use_emutls" = "yes yes"; then
331 set_use_emutls="-DUSE_EMUTLS"
333 AC_SUBST(set_use_emutls)
335 # Conditionalize the sfp-machine.h header for this target machine.
336 if test -z "${sfp_machine_header}"; then
337 sfp_machine_header=$cpu_type/sfp-machine.h
338 if test -f ${srcdir}/config/${sfp_machine_header}; then
341 sfp_machine_header=no-sfp-machine.h
344 AC_SUBST(sfp_machine_header)
346 # Conditionalize the makefile for this target machine.
348 for f in ${tmake_file}
350 if test -f ${srcdir}/config/$f
352 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
355 tmake_file="${tmake_file_}"
358 # Likewise export definitions for libgcc_tm.h
362 tm_file_="${tm_file_} \$(srcdir)/config/$f"
364 tm_file="${tm_file_}"
368 # Map from thread model to thread header.
369 case $target_thread_file in
370 aix) thread_header=config/rs6000/gthr-aix.h ;;
371 dce) thread_header=config/pa/gthr-dce.h ;;
372 lynx) thread_header=config/gthr-lynx.h ;;
373 mipssde) thread_header=config/mips/gthr-mipssde.h ;;
374 posix) thread_header=gthr-posix.h ;;
375 rtems) thread_header=config/gthr-rtems.h ;;
376 single) thread_header=gthr-single.h ;;
377 tpf) thread_header=config/s390/gthr-tpf.h ;;
378 vxworks) thread_header=config/gthr-vxworks.h ;;
379 win32) thread_header=config/i386/gthr-win32.h ;;
382 # Substitute configuration variables
384 AC_SUBST(extra_parts)
385 AC_SUBST(asm_hidden_op)
386 AC_CONFIG_LINKS([enable-execute-stack.c:$enable_execute_stack])
387 AC_CONFIG_LINKS([unwind.h:$unwind_header])
388 AC_CONFIG_LINKS([md-unwind-support.h:config/$md_unwind_header])
389 AC_CONFIG_LINKS([sfp-machine.h:config/$sfp_machine_header])
390 AC_CONFIG_LINKS([gthr-default.h:$thread_header])
392 # We need multilib support.
393 AC_CONFIG_FILES([Makefile])
394 AC_CONFIG_COMMANDS([default],
395 [[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
396 if test -n "$CONFIG_FILES"; then
397 # FIXME: We shouldn't need to set ac_file
399 . ${libgcc_topdir}/config-ml.in
403 with_target_subdir=${with_target_subdir}
404 with_multisubdir=${with_multisubdir}
405 ac_configure_args="--enable-multilib ${ac_configure_args}"
406 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
407 libgcc_topdir=${libgcc_topdir}