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/toolexeclibdir.m4)
6 sinclude(../config/acx.m4)
7 sinclude(../config/no-executables.m4)
8 sinclude(../config/lib-ld.m4)
9 sinclude(../config/override.m4)
10 sinclude(../config/picflag.m4)
11 sinclude(../config/dfp.m4)
12 sinclude(../config/unwind_ipinfo.m4)
13 sinclude(../config/gthr.m4)
14 sinclude(../config/sjlj.m4)
15 sinclude(../config/cet.m4)
17 AC_INIT([GNU C Runtime Library], 1.0,,[libgcc])
18 AC_CONFIG_SRCDIR([static-object.mk])
20 # The libgcc should not depend on any header files
21 AC_DEFUN([_AC_INCLUDES_DEFAULT_REQUIREMENTS],
22 [m4_divert_text([DEFAULTS],
23 [ac_includes_default='/* none */'])])
25 AC_ARG_WITH(target-subdir,
26 [ --with-target-subdir=SUBDIR Configuring in a subdirectory for target])
27 AC_ARG_WITH(cross-host,
28 [ --with-cross-host=HOST Configuring with a cross compiler])
30 [ --with-ld arrange to use the specified ld (full pathname)])
32 if test "${srcdir}" = "."; then
33 if test -n "${with_build_subdir}"; then
34 libgcc_topdir="${srcdir}/../.."
36 elif test -z "${with_target_subdir}"; then
37 libgcc_topdir="${srcdir}/.."
39 if test "${with_target_subdir}" != "."; then
40 libgcc_topdir="${srcdir}/${with_multisrctop}../.."
42 libgcc_topdir="${srcdir}/${with_multisrctop}.."
46 libgcc_topdir="${srcdir}/.."
48 AC_SUBST(libgcc_topdir)
49 AC_CONFIG_AUX_DIR($libgcc_topdir)
50 AC_CONFIG_HEADER(auto-target.h:config.in)
53 [ --disable-shared don't provide a shared libgcc],
55 case $enable_shared in
59 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
60 for pkg in $enableval; do
61 if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
68 ], [enable_shared=yes])
69 AC_SUBST(enable_shared)
71 AC_ARG_ENABLE(vtable-verify,
72 [ --enable-vtable-verify Enable vtable verification feature ],
74 yes) enable_vtable_verify=yes ;;
75 no) enable_vtable_verify=no ;;
76 *) enable_vtable_verify=no;;
78 [enable_vtable_verify=no])
79 AC_SUBST(enable_vtable_verify)
81 AC_ARG_WITH(aix-soname,
82 [AS_HELP_STRING([--with-aix-soname=aix|svr4|both],
83 [shared library versioning (aka "SONAME") variant to provide on AIX])],
84 [case "${host}:${enable_shared}" in
85 power*-*-aix[[5-9]]*:yes)
86 AC_MSG_CHECKING([which variant of shared library versioning to provide for shared libgcc])
89 *) AC_MSG_ERROR([Unknown argument to --with-aix-soname]);;
91 AC_MSG_RESULT($withval)
93 *) with_aix_soname=aix ;;
95 ], [with_aix_soname=aix])
96 AC_SUBST(with_aix_soname)
101 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
102 AC_ARG_ENABLE(version-specific-runtime-libs,
103 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
104 [case "$enableval" in
105 yes) version_specific_libs=yes ;;
106 no) version_specific_libs=no ;;
107 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
109 [version_specific_libs=no])
110 AC_MSG_RESULT($version_specific_libs)
112 GCC_WITH_TOOLEXECLIBDIR
115 [ --with-slibdir=DIR shared libraries in DIR [LIBDIR]],
116 slibdir="$with_slibdir",
117 [if test "${version_specific_libs}" = yes; then
118 slibdir='$(libsubdir)'
119 elif test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
120 case ${with_toolexeclibdir} in
122 slibdir='$(exec_prefix)/$(host_noncanonical)/lib'
125 slibdir=${with_toolexeclibdir}
133 # Command-line options.
134 # Very limited version of AC_MAINTAINER_MODE.
135 AC_ARG_ENABLE([maintainer-mode],
136 [AC_HELP_STRING([--enable-maintainer-mode],
137 [enable make rules and dependencies not useful (and
138 sometimes confusing) to the casual installer])],
139 [case ${enable_maintainer_mode} in
142 *) AC_MSG_ERROR([--enable-maintainer-mode must be yes or no]) ;;
144 maintainer_mode=${enableval}],
151 # We need awk; bail out if it's missing.
153 "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
157 ACX_NONCANONICAL_HOST
158 ACX_NONCANONICAL_TARGET
162 [ --disable-gcov don't provide libgcov and related host tools],
171 AC_SUBST(enable_gcov)
173 # Calculate toolexeclibdir
174 # Also toolexecdir, though it's only used in toolexeclibdir
175 case ${version_specific_libs} in
177 # Need the gcc compiler version to know where to install libraries
178 # and header files if --enable-version-specific-runtime-libs option
180 toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
181 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
184 if test -n "$with_cross_host" &&
185 test x"$with_cross_host" != x"no"; then
186 # Install a library built with a cross compiler in tooldir, not libdir.
187 toolexecdir='$(exec_prefix)/$(target_noncanonical)'
188 case ${with_toolexeclibdir} in
190 toolexeclibdir='$(toolexecdir)/lib'
193 toolexeclibdir=${with_toolexeclibdir}
197 toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
198 toolexeclibdir='$(libdir)'
200 multi_os_directory=`$CC -print-multi-os-directory`
201 case $multi_os_directory in
202 .) ;; # Avoid trailing /.
203 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
207 AC_SUBST(toolexecdir)
208 AC_SUBST(toolexeclibdir)
210 dnl These must be called before AM_PROG_LIBTOOL, because it may want
211 dnl to call AC_CHECK_PROG.
212 AC_CHECK_TOOL(AR, ar)
213 AC_CHECK_TOOL(LIPO, lipo, :)
214 AC_CHECK_TOOL(NM, nm)
215 AC_CHECK_TOOL(RANLIB, ranlib, :)
216 AC_CHECK_TOOL(STRIP, strip, :)
225 AC_CHECK_SIZEOF([double])
226 AC_CHECK_SIZEOF([long double])
227 AS_VAR_ARITH([double_type_size], [$ac_cv_sizeof_double \* 8])
228 AS_VAR_ARITH([long_double_type_size], [$ac_cv_sizeof_long_double \* 8])
229 AC_SUBST(double_type_size)
230 AC_SUBST(long_double_type_size)
232 AC_CHECK_HEADERS(inttypes.h stdint.h stdlib.h ftw.h \
233 unistd.h sys/stat.h sys/types.h \
234 string.h strings.h memory.h sys/auxv.h sys/mman.h)
237 # Check for decimal float support.
238 AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp],
239 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
244 FE_INVALID|FE_DIVBYZERO|FE_OVERFLOW|FE_UNDERFLOW|FE_INEXACT;
247 [libgcc_cv_dfp=no])])
248 decimal_float=$libgcc_cv_dfp
249 AC_SUBST(decimal_float)
251 GCC_AC_ENABLE_DECIMAL_FLOAT([$host])
253 # Check for fixed-point support.
254 AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point],
255 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([_Sat _Fract x;])],
256 [libgcc_cv_fixed_point=yes],
257 [libgcc_cv_fixed_point=no])])
258 fixed_point=$libgcc_cv_fixed_point
259 AC_SUBST(fixed_point)
261 # For platforms with the unwind ABI which includes an unwind library,
262 # libunwind, we can choose to use the system libunwind.
263 # config.gcc also contains tests of with_system_libunwind.
264 GCC_CHECK_UNWIND_GETIPINFO
266 # Check if the compiler is configured for setjmp/longjmp exceptions.
267 GCC_CHECK_SJLJ_EXCEPTIONS
269 GCC_CET_FLAGS(CET_FLAGS)
272 AC_ARG_ENABLE([explicit-exception-frame-registration],
273 [AC_HELP_STRING([--enable-explicit-exception-frame-registration],
274 [register exception tables explicitly at module start, for use
275 e.g. for compatibility with installations without PT_GNU_EH_FRAME support])],
277 force_explicit_eh_registry=
278 if test "$enable_explicit_exception_frame_registration" = yes; then
279 if test $ac_cv_sjlj_exceptions = yes; then
280 AC_MSG_ERROR([Can't --enable-explicit-exception-frame-registration
281 with setjmp/longjmp exceptions])
283 force_explicit_eh_registry=-DUSE_EH_FRAME_REGISTRY_ALWAYS
286 AC_SUBST([force_explicit_eh_registry])
288 AC_ARG_ENABLE([tm-clone-registry],
289 [ --disable-tm-clone-registry disable TM clone registry],
291 use_tm_clone_registry=
292 if test "$enable_tm_clone_registry" = no; then
293 use_tm_clone_registry=-DUSE_TM_CLONE_REGISTRY=0
297 use_tm_clone_registry=
300 use_tm_clone_registry=-DUSE_TM_CLONE_REGISTRY=0
304 AC_SUBST([use_tm_clone_registry])
308 AC_MSG_CHECKING([for thread model used by GCC])
309 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
310 AC_MSG_RESULT([$target_thread_file])
312 # Check for assembler CFI support.
313 AC_CACHE_CHECK([whether assembler supports CFI directives], [libgcc_cv_cfi],
315 [AC_LANG_SOURCE([asm("\n\
318 .cfi_personality 0, symbol\n\
321 [libgcc_cv_cfi=no])])
323 # Check 32bit or 64bit. In the case of MIPS, this really determines the
324 # word size rather than the address size.
325 cat > conftest.c <<EOF
326 #if defined(__x86_64__) || (!defined(__i386__) && defined(__LP64__)) \
327 || defined(__mips64) || defined(__loongarch64)
333 eval `${CC-cc} -E conftest.c | grep host_address=`
338 AC_CACHE_CHECK([whether the target is hard-float],
339 [libgcc_cv_mips_hard_float],
341 [AC_LANG_SOURCE([#ifndef __mips_hard_float
345 [libgcc_cv_mips_hard_float=yes],
346 [libgcc_cv_mips_hard_float=no])])
351 # Check for system-provided CRTs on Solaris 11.4.
352 AC_CACHE_CHECK([system-provided CRTs on Solaris],
353 [libgcc_cv_solaris_crts],
354 [libgcc_cv_solaris_crts=no
355 libgcc_sysroot="`${CC} -print-sysroot`"
356 libgcc_libdir="$libgcc_sysroot/usr/lib"
357 # At the time they were added, gcrt1.o became a symlink for backwards
358 # compatibility on x86, while crt1.o was added on sparc, so check for that.
360 i?86-*-solaris2* | x86_64-*-solaris2*)
361 if test -h "$libgcc_libdir/gcrt1.o"; then libgcc_cv_solaris_crts=yes; fi
364 if test -f "$libgcc_libdir/crt1.o"; then libgcc_cv_solaris_crts=yes; fi
367 if test $libgcc_cv_solaris_crts = yes; then
368 AC_DEFINE(HAVE_SOLARIS_CRTS, 1,
369 [Define if the system-provided CRTs are present on Solaris.])
374 # Determine the version of glibc, if any, used on the target.
375 AC_MSG_CHECKING([for target glibc version])
376 AC_ARG_WITH([glibc-version],
377 [AS_HELP_STRING([--with-glibc-version=M.N],
378 [assume GCC used with glibc version M.N or later])], [
379 if [echo "$with_glibc_version" | grep '^[0-9][0-9]*\.[0-9][0-9]*$']; then
380 glibc_version_major=`echo "$with_glibc_version" | sed -e 's/\..*//'`
381 glibc_version_minor=`echo "$with_glibc_version" | sed -e 's/.*\.//'`
383 AC_MSG_ERROR([option --with-glibc-version requires a version number M.N])
385 AC_COMPUTE_INT([glibc_version_major], [__GLIBC__],
386 [#include <features.h>],
387 [glibc_version_major=0])
388 AC_COMPUTE_INT([glibc_version_minor], [__GLIBC_MINOR__],
389 [#include <features.h>],
390 [glibc_version_minor=0])])
391 AC_MSG_RESULT([$glibc_version_major.$glibc_version_minor])
393 # Determine floating-point type for powerpc*-*-linux* or vxworks7*.
394 # Single-precision-only FPRs are not a supported configuration for
395 # this target, so are not allowed for in this test.
397 powerpc*-*-linux* | powerpc*-*-vxworks7*)
398 cat > conftest.c <<EOF
401 #elif defined _SOFT_FLOAT
403 #elif defined _SOFT_DOUBLE
405 #elif defined __NO_FPRS__
411 eval `${CC-cc} -E conftest.c | grep ppc_fp_type=`
413 # glibc 2.19 and later provide all the soft-fp functions, with proper
414 # interactions with <fenv.h> exception and rounding mode handling, so
415 # make libgcc's versions into compat symbols if a recent enough glibc
416 # version is being used.
418 case ${ppc_fp_type} in
420 if test $glibc_version_major -gt 2 \
421 || ( test $glibc_version_major -eq 2 \
422 && test $glibc_version_minor -ge 19 ); then
423 ppc_fp_compat="t-softfp-compat"
431 # At present, we cannot turn -mfloat128 on via #pragma GCC target, so just
432 # check if we have VSX (ISA 2.06) support to build the software libraries, and
433 # whether the assembler can handle xsaddqp for hardware support. Also check if
434 # a new glibc is being used so that __builtin_cpu_supports can be used.
436 saved_CFLAGS="$CFLAGS"
437 CFLAGS="$CFLAGS -mabi=altivec -mvsx -mfloat128"
438 AC_CACHE_CHECK([for PowerPC ISA 2.06 to build __float128 libraries],
439 [libgcc_cv_powerpc_float128],
441 [AC_LANG_SOURCE([vector double dadd (vector double a, vector double b) { return a + b; }])],
442 [libgcc_cv_powerpc_float128=yes],
443 [libgcc_cv_powerpc_float128=no])])
445 CFLAGS="$CFLAGS -mpower9-vector -mfloat128-hardware"
446 AC_CACHE_CHECK([for PowerPC ISA 3.0 to build hardware __float128 libraries],
447 [libgcc_cv_powerpc_float128_hw],
449 [AC_LANG_SOURCE([#include <sys/auxv.h>
451 #error "AT_PLATFORM is not defined"
453 #ifndef __BUILTIN_CPU_SUPPORTS__
454 #error "__builtin_cpu_supports is not available"
456 vector unsigned char add (vector unsigned char a, vector unsigned char b)
458 vector unsigned char ret;
459 __asm__ ("xsaddqp %0,%1,%2" : "=v" (ret) : "v" (a), "v" (b));
462 void *add_resolver (void) { return (void *) add; }
463 __float128 add_ifunc (__float128, __float128)
464 __attribute__ ((__ifunc__ ("add_resolver")));])],
465 [libgcc_cv_powerpc_float128_hw=yes],
466 [libgcc_cv_powerpc_float128_hw=no])])
467 CFLAGS="$saved_CFLAGS"
469 saved_CFLAGS="$CFLAGS"
470 CFLAGS="$CFLAGS -mcpu=power10 -mfloat128-hardware"
471 AC_CACHE_CHECK([for PowerPC ISA 3.1 to build hardware __float128 libraries],
472 [libgcc_cv_powerpc_3_1_float128_hw],
474 [AC_LANG_SOURCE([#include <sys/auxv.h>
476 #error "AT_PLATFORM is not defined"
478 #ifndef __BUILTIN_CPU_SUPPORTS__
479 #error "__builtin_cpu_supports is not available"
481 vector unsigned char conv (vector unsigned char qs)
483 vector unsigned char ret;
484 __asm__ ("xscvsqqp %0,%1" : "=v" (ret) : "v" (qs));
487 void *conv_resolver (void) { return (void *) conv; }
488 __float128 conv_ifunc (__float128)
489 __attribute__ ((__ifunc__ ("conv_resolver")));])],
490 [libgcc_cv_powerpc_3_1_float128_hw=yes],
491 [libgcc_cv_powerpc_3_1_float128_hw=no])])
492 CFLAGS="$saved_CFLAGS"
495 # Collect host-machine-specific information.
496 . ${srcdir}/config.host
498 # Used for constructing correct paths for offload compilers.
500 real_host_noncanonical=${host_noncanonical}
501 if test x"$enable_as_accelerator_for" != x; then
502 accel_dir_suffix=/accel/${target_noncanonical}
503 real_host_noncanonical=${enable_as_accelerator_for}
505 AC_SUBST(accel_dir_suffix)
506 AC_SUBST(real_host_noncanonical)
508 if test x"$enable_offload_targets" != x; then
509 extra_parts="${extra_parts} crtoffloadbegin.o crtoffloadend.o crtoffloadtable.o"
512 # Check if Solaris/x86 linker supports ZERO terminator unwind entries.
513 # This is after config.host so we can augment tmake_file.
514 # Link with -nostartfiles -nodefaultlibs since neither are present while
517 i?86-*-solaris2* | x86_64-*-solaris2*)
518 cat > conftest.s <<EOF
519 .section .eh_frame,"a",@unwind
521 .section .jcr,"aw",@progbits
524 if AC_TRY_COMMAND(${CC-cc} -shared -nostartfiles -nodefaultlibs -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD); then
525 tmake_file="${tmake_file} i386/t-crtstuff"
530 # Check if Solaris linker support v2 linker mapfile syntax.
531 # Link with -nostartfiles -nodefaultlibs since neither are present while
535 solaris_ld_v2_maps=no
536 echo 'int main(void) {return 0;}' > conftest.c
537 echo '$mapfile_version 2' > conftest.map
538 if AC_TRY_COMMAND([${CC-cc} -nostartfiles -nodefaultlibs -Wl,-M,conftest.map -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then
539 solaris_ld_v2_maps=yes
543 AC_SUBST(solaris_ld_v2_maps)
545 # Check if xtensa target is configured for windowed ABI and thus needs to use
546 # custom unwind code.
547 # This is after config.host so we can augment tmake_file.
550 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
551 [#ifdef __XTENSA_CALL0_ABI__
555 [tmake_file="${tmake_file} xtensa/t-windowed"])
559 # Check for visibility support. This is after config.host so that
560 # we can check for asm_hidden_op.
561 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
562 libgcc_cv_hidden_visibility_attribute, [
563 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c
564 libgcc_cv_hidden_visibility_attribute=no
565 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
566 if grep "\\$asm_hidden_op.*foo" conftest.s >/dev/null; then
567 libgcc_cv_hidden_visibility_attribute=yes
573 if test $libgcc_cv_hidden_visibility_attribute = yes; then
574 vis_hide='-fvisibility=hidden -DHIDE_EXPORTS'
575 AC_DEFINE_UNQUOTED(AS_HIDDEN_DIRECTIVE, $asm_hidden_op, [Define to the .hidden-like directive if it exists.])
581 # Check for .cfi_sections .debug_frame support.
582 AC_CACHE_CHECK([for .cfi_sections .debug_frame],
583 libgcc_cv_cfi_sections_directive, [
584 echo 'int foo (int, char *);' > conftest.c
585 echo 'int bar (int x) { char *y = __builtin_alloca (x); return foo (x + 1, y) + 1; }' >> conftest.c
586 libgcc_cv_cfi_sections_directive=no
587 if AC_TRY_COMMAND(${CC-cc} -Werror -g -fno-asynchronous-unwind-tables -fno-unwind-tables -fno-exceptions -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
588 if grep "\\.cfi_sections.*\\.debug_frame" conftest.s >/dev/null; then
589 libgcc_cv_cfi_sections_directive=yes
594 if test $libgcc_cv_cfi_sections_directive = yes; then
595 AC_DEFINE(HAVE_AS_CFI_SECTIONS, 1, [Define to 1 if the assembler supports .cfi_sections .debug_frame directive.])
598 # See if we have thread-local storage. We can only test assembler
599 # since link-time and run-time tests require the newly built
600 # gcc, which can't be used to build executable due to that libgcc
601 # is yet to be built here.
604 if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then
605 set_have_cc_tls="-DHAVE_CC_TLS"
607 AC_SUBST(set_have_cc_tls)
609 # See if we have emulated thread-local storage.
612 if test "$enable_tls $gcc_cv_use_emutls" = "yes yes"; then
613 set_use_emutls="-DUSE_EMUTLS"
615 AC_SUBST(set_use_emutls)
617 dnl Check if as supports AVX instructions.
618 AC_DEFUN([LIBGCC_CHECK_AS_AVX], [
620 i[[34567]]86-*-* | x86_64-*-*)
621 AC_CACHE_CHECK([if the assembler supports AVX], libgcc_cv_as_avx, [
622 AC_TRY_COMPILE([], [asm("vzeroupper");],
623 [libgcc_cv_as_avx=yes], [libgcc_cv_as_avx=no])
625 if test x$libgcc_cv_as_avx = xyes; then
626 AC_DEFINE(HAVE_AS_AVX, 1, [Define to 1 if the assembler supports AVX.])
632 dnl Check if as supports LSE instructions.
633 AC_DEFUN([LIBGCC_CHECK_AS_LSE], [
636 AC_CACHE_CHECK([if the assembler supports LSE], libgcc_cv_as_lse, [
639 asm(".arch armv8-a+lse\n\tcas w0, w1, [x2]");
642 [libgcc_cv_as_lse=yes], [libgcc_cv_as_lse=no])
644 if test x$libgcc_cv_as_lse = xyes; then
645 AC_DEFINE(HAVE_AS_LSE, 1, [Define to 1 if the assembler supports LSE.])
651 dnl Check if as supports .variant_pcs.
652 AC_DEFUN([LIBGCC_CHECK_AS_VARIANT_PCS], [
655 AC_CACHE_CHECK([if as supports .variant_pcs], libgcc_cv_as_variant_pcs, [
656 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,
657 [[asm (".variant_pcs foobar");]])],
658 [libgcc_cv_as_variant_pcs=yes], [libgcc_cv_as_variant_pcs=no])
660 if test x$libgcc_cv_as_variant_pcs = xyes; then
661 AC_DEFINE(HAVE_AS_VARIANT_PCS, 1,
662 [Define to 1 if the assembler supports .variant_pcs.])
666 LIBGCC_CHECK_AS_VARIANT_PCS
668 # Check __getauxval ABI symbol for CPU feature detection.
671 # No link check because the libc may not be present.
672 AC_CACHE_CHECK([for __getauxval],
673 [libgcc_cv_have___getauxval],
676 libgcc_cv_have___getauxval=yes
679 libgcc_cv_have___getauxval=no
681 if test x$libgcc_cv_have___getauxval = xyes; then
682 AC_DEFINE(HAVE___GETAUXVAL, 1,
683 [Define to 1 if __getauxval is available.])
687 dnl Check if as supports RTM instructions.
688 AC_CACHE_CHECK(for init priority support, libgcc_cv_init_priority, [
689 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,
690 [[void ip (void) __attribute__ ((constructor (1)));]])],
691 [libgcc_cv_init_priority=yes],[libgcc_cv_init_priority=no])])
692 if test $libgcc_cv_init_priority = yes; then
693 AC_DEFINE(HAVE_INIT_PRIORITY, 1,
694 [Define if the compiler supports init priority.])
697 # Conditionalize the sfp-machine.h header for this target machine.
698 if test -z "${sfp_machine_header}"; then
699 sfp_machine_header=$cpu_type/sfp-machine.h
700 if test -f ${srcdir}/config/${sfp_machine_header}; then
703 sfp_machine_header=no-sfp-machine.h
706 AC_SUBST(sfp_machine_header)
708 # Conditionalize the makefile for this target machine.
710 for f in ${tmake_file}
712 if test -f ${srcdir}/config/$f
714 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
717 tmake_file="${tmake_file_}"
720 # Likewise export definitions for libgcc_tm.h
724 tm_file_="${tm_file_} \$(srcdir)/config/$f"
726 tm_file="${tm_file_}"
730 # Map from thread model to thread header.
731 GCC_AC_THREAD_HEADER([$target_thread_file])
733 AC_CACHE_CHECK([for strub support],
734 [libgcc_cv_strub_support],
736 [AC_LANG_SOURCE([void __attribute__ ((__strub__)) fn (void) {}])],
737 [libgcc_cv_strub_support=yes],
738 [libgcc_cv_strub_support=no])])
739 if test "x$libgcc_cv_strub_support" != xno; then
742 HAVE_STRUB_SUPPORT='# '
744 AC_SUBST(HAVE_STRUB_SUPPORT)
746 # Determine what GCC version number to use in filesystem paths.
749 # Substitute configuration variables
751 AC_SUBST(extra_parts)
752 AC_SUBST(asm_hidden_op)
753 AC_SUBST(enable_execute_stack)
754 AC_SUBST(unwind_header)
755 AC_SUBST(md_unwind_header)
756 AC_SUBST(sfp_machine_header)
757 AC_SUBST(thread_header)
759 # We need multilib support.
760 AC_CONFIG_FILES([Makefile])
761 AC_CONFIG_COMMANDS([default],
762 [[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
763 if test -n "$CONFIG_FILES"; then
764 # FIXME: We shouldn't need to set ac_file
766 . ${libgcc_topdir}/config-ml.in
770 with_target_subdir=${with_target_subdir}
771 with_multisubdir=${with_multisubdir}
772 ac_configure_args="--enable-multilib ${ac_configure_args}"
773 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
774 libgcc_topdir=${libgcc_topdir}