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 AC_ARG_WITH(target-subdir,
18 [ --with-target-subdir=SUBDIR Configuring in a subdirectory for target])
19 AC_ARG_WITH(cross-host,
20 [ --with-cross-host=HOST Configuring with a cross compiler])
22 [ --with-ld arrange to use the specified ld (full pathname)])
24 if test "${srcdir}" = "."; then
25 if test -n "${with_build_subdir}"; then
26 libgcc_topdir="${srcdir}/../.."
28 elif test -z "${with_target_subdir}"; then
29 libgcc_topdir="${srcdir}/.."
31 if test "${with_target_subdir}" != "."; then
32 libgcc_topdir="${srcdir}/${with_multisrctop}../.."
34 libgcc_topdir="${srcdir}/${with_multisrctop}.."
38 libgcc_topdir="${srcdir}/.."
40 AC_SUBST(libgcc_topdir)
41 AC_CONFIG_AUX_DIR($libgcc_topdir)
44 [ --disable-shared don't provide a shared libgcc],
46 case $enable_shared in
50 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
51 for pkg in $enableval; do
52 if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
59 ], [enable_shared=yes])
60 AC_SUBST(enable_shared)
65 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
66 AC_ARG_ENABLE(version-specific-runtime-libs,
67 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
69 yes) version_specific_libs=yes ;;
70 no) version_specific_libs=no ;;
71 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
73 [version_specific_libs=no])
74 AC_MSG_RESULT($version_specific_libs)
77 [ --with-slibdir=DIR shared libraries in DIR [LIBDIR]],
78 slibdir="$with_slibdir",
79 if test "${version_specific_libs}" = yes; then
80 slibdir='$(libsubdir)'
81 elif test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
82 slibdir='$(exec_prefix)/$(host_noncanonical)/lib'
88 # Command-line options.
89 # Very limited version of AC_MAINTAINER_MODE.
90 AC_ARG_ENABLE([maintainer-mode],
91 [AC_HELP_STRING([--enable-maintainer-mode],
92 [enable make rules and dependencies not useful (and
93 sometimes confusing) to the casual installer])],
94 [case ${enable_maintainer_mode} in
97 *) AC_MSG_ERROR([--enable-maintainer-mode must be yes or no]) ;;
99 maintainer_mode=${enableval}],
106 # We need awk; bail out if it's missing.
108 "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
112 ACX_NONCANONICAL_HOST
113 ACX_NONCANONICAL_TARGET
116 # Calculate toolexeclibdir
117 # Also toolexecdir, though it's only used in toolexeclibdir
118 case ${version_specific_libs} in
120 # Need the gcc compiler version to know where to install libraries
121 # and header files if --enable-version-specific-runtime-libs option
123 toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
124 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
127 if test -n "$with_cross_host" &&
128 test x"$with_cross_host" != x"no"; then
129 # Install a library built with a cross compiler in tooldir, not libdir.
130 toolexecdir='$(exec_prefix)/$(target_noncanonical)'
131 toolexeclibdir='$(toolexecdir)/lib'
133 toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
134 toolexeclibdir='$(libdir)'
136 multi_os_directory=`$CC -print-multi-os-directory`
137 case $multi_os_directory in
138 .) ;; # Avoid trailing /.
139 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
143 AC_SUBST(toolexecdir)
144 AC_SUBST(toolexeclibdir)
146 dnl These must be called before AM_PROG_LIBTOOL, because it may want
147 dnl to call AC_CHECK_PROG.
148 AC_CHECK_TOOL(AR, ar)
149 AC_CHECK_TOOL(LIPO, lipo, :)
150 AC_CHECK_TOOL(NM, nm)
151 AC_CHECK_TOOL(RANLIB, ranlib, :)
152 AC_CHECK_TOOL(STRIP, strip, :)
159 AC_CHECK_SIZEOF([double])
160 AC_CHECK_SIZEOF([long double])
161 AS_VAR_ARITH([double_type_size], [$ac_cv_sizeof_double \* 8])
162 AS_VAR_ARITH([long_double_type_size], [$ac_cv_sizeof_long_double \* 8])
163 AC_SUBST(double_type_size)
164 AC_SUBST(long_double_type_size)
166 # Check for decimal float support.
167 AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp],
168 [AC_COMPILE_IFELSE([_Decimal32 x;], [libgcc_cv_dfp=yes],
169 [libgcc_cv_dfp=no])])
170 decimal_float=$libgcc_cv_dfp
171 AC_SUBST(decimal_float)
173 GCC_AC_ENABLE_DECIMAL_FLOAT([$host])
175 # Check for fixed-point support.
176 AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point],
177 [AC_COMPILE_IFELSE([_Sat _Fract x;], [libgcc_cv_fixed_point=yes],
178 [libgcc_cv_fixed_point=no])])
179 fixed_point=$libgcc_cv_fixed_point
180 AC_SUBST(fixed_point)
182 # For platforms with the unwind ABI which includes an unwind library,
183 # libunwind, we can choose to use the system libunwind.
184 # config.gcc also contains tests of with_system_libunwind.
185 GCC_CHECK_UNWIND_GETIPINFO
187 # The sjlj test is almost duplicated here and in libgo/configure.ac (for C),
188 # libstdc++-v3/acinclude.m4 and libjava/configure.ac (for C++), and
189 # libobjc/configure.ac (for Objective-C).
190 # FIXME: This should be centralized in config/sjlj.m4.
191 AC_ARG_ENABLE(sjlj-exceptions,
192 AC_HELP_STRING([--enable-sjlj-exceptions],
193 [force use of builtin_setjmp for exceptions]),
194 [case "$enableval" in
196 *) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;;
198 [enable_sjlj_exceptions=auto])
200 AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions],
201 [libgcc_cv_lib_sjlj_exceptions],
208 int i __attribute__ ((cleanup (clean)));
213 CFLAGS="--save-temps -fexceptions"
214 libgcc_cv_lib_sjlj_exceptions=unknown
215 AS_IF([ac_fn_c_try_compile],
216 [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
217 libgcc_cv_lib_sjlj_exceptions=yes
218 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
219 libgcc_cv_lib_sjlj_exceptions=no
225 if test "$enable_sjlj_exceptions" = "auto"; then
226 enable_sjlj_exceptions=$libgcc_cv_lib_sjlj_exceptions
229 case $enable_sjlj_exceptions in
231 AC_DEFINE(LIBGCC_SJLJ_EXCEPTIONS, 1,
232 [Define if the C compiler is configured for setjmp/longjmp exceptions.])
237 AC_MSG_ERROR([unable to detect exception model])
243 AC_MSG_CHECKING([for thread model used by GCC])
244 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
245 AC_MSG_RESULT([$target_thread_file])
247 # Check for assembler CFI support.
248 AC_CACHE_CHECK([whether assembler supports CFI directives], [libgcc_cv_cfi],
253 .cfi_personality 0, symbol\n\
256 [libgcc_cv_cfi=no])])
258 # Check 32bit or 64bit
259 cat > conftest.c <<EOF
260 #if defined(__x86_64__) || (!defined(__i386__) && defined(__LP64__))
266 eval `${CC-cc} -E conftest.c | grep host_address=`
269 # Collect host-machine-specific information.
270 . ${srcdir}/config.host
272 # Check if Solaris/x86 linker supports ZERO terminator unwind entries.
273 # This is after config.host so we can augment tmake_file.
274 # Link with -nostartfiles -nodefaultlibs since neither are present while
277 i?86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
278 cat > conftest.s <<EOF
279 .section .eh_frame,"a",@unwind
281 .section .jcr,"aw",@progbits
284 if AC_TRY_COMMAND(${CC-cc} -shared -nostartfiles -nodefaultlibs -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD); then
285 tmake_file="${tmake_file} i386/t-crtstuff"
290 # Check for visibility support. This is after config.host so that
291 # we can check for asm_hidden_op.
292 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
293 libgcc_cv_hidden_visibility_attribute, [
294 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c
295 libgcc_cv_hidden_visibility_attribute=no
296 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
297 if grep "\\$asm_hidden_op.*foo" conftest.s >/dev/null; then
298 libgcc_cv_hidden_visibility_attribute=yes
304 if test $libgcc_cv_hidden_visibility_attribute = yes; then
305 vis_hide='-fvisibility=hidden -DHIDE_EXPORTS'
311 # See if we have thread-local storage. We can only test assembler
312 # sicne link-time and run-time tests require the newly built
313 # gcc, which can't be used to build executable due to that libgcc
314 # is yet to be built here.
317 if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then
318 set_have_cc_tls="-DHAVE_CC_TLS"
320 AC_SUBST(set_have_cc_tls)
322 # See if we have emulated thread-local storage.
325 if test "$enable_tls $gcc_cv_use_emutls" = "yes yes"; then
326 set_use_emutls="-DUSE_EMUTLS"
328 AC_SUBST(set_use_emutls)
330 # Conditionalize the sfp-machine.h header for this target machine.
331 if test -z "${sfp_machine_header}"; then
332 sfp_machine_header=$cpu_type/sfp-machine.h
333 if test -f ${srcdir}/config/${sfp_machine_header}; then
336 sfp_machine_header=no-sfp-machine.h
339 AC_SUBST(sfp_machine_header)
341 # Conditionalize the makefile for this target machine.
343 for f in ${tmake_file}
345 if test -f ${srcdir}/config/$f
347 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
350 tmake_file="${tmake_file_}"
353 # Likewise export definitions for libgcc_tm.h
357 tm_file_="${tm_file_} \$(srcdir)/config/$f"
359 tm_file="${tm_file_}"
363 # Map from thread model to thread header.
364 case $target_thread_file in
365 aix) thread_header=config/rs6000/gthr-aix.h ;;
366 dce) thread_header=config/pa/gthr-dce.h ;;
367 lynx) thread_header=config/gthr-lynx.h ;;
368 mipssde) thread_header=config/mips/gthr-mipssde.h ;;
369 posix) thread_header=gthr-posix.h ;;
370 rtems) thread_header=config/gthr-rtems.h ;;
371 single) thread_header=gthr-single.h ;;
372 tpf) thread_header=config/s390/gthr-tpf.h ;;
373 vxworks) thread_header=config/gthr-vxworks.h ;;
374 win32) thread_header=config/i386/gthr-win32.h ;;
377 # Substitute configuration variables
379 AC_SUBST(extra_parts)
380 AC_SUBST(asm_hidden_op)
381 AC_CONFIG_LINKS([enable-execute-stack.c:$enable_execute_stack])
382 AC_CONFIG_LINKS([unwind.h:$unwind_header])
383 AC_CONFIG_LINKS([md-unwind-support.h:config/$md_unwind_header])
384 AC_CONFIG_LINKS([sfp-machine.h:config/$sfp_machine_header])
385 AC_CONFIG_LINKS([gthr-default.h:$thread_header])
387 # We need multilib support.
388 AC_CONFIG_FILES([Makefile])
389 AC_CONFIG_COMMANDS([default],
390 [[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
391 if test -n "$CONFIG_FILES"; then
392 # FIXME: We shouldn't need to set ac_file
394 . ${libgcc_topdir}/config-ml.in
398 with_target_subdir=${with_target_subdir}
399 with_multisubdir=${with_multisubdir}
400 ac_configure_args="--enable-multilib ${ac_configure_args}"
401 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
402 libgcc_topdir=${libgcc_topdir}