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/dfp.m4)
12 AC_INIT([GNU C Runtime Library], 1.0,,[libgcc])
13 AC_CONFIG_SRCDIR([static-object.mk])
15 AC_ARG_WITH(target-subdir,
16 [ --with-target-subdir=SUBDIR Configuring in a subdirectory for target])
17 AC_ARG_WITH(cross-host,
18 [ --with-cross-host=HOST Configuring with a cross compiler])
20 [ --with-ld arrange to use the specified ld (full pathname)])
22 if test "${srcdir}" = "."; then
23 if test -n "${with_build_subdir}"; then
24 libgcc_topdir="${srcdir}/../.."
26 elif test -z "${with_target_subdir}"; then
27 libgcc_topdir="${srcdir}/.."
29 if test "${with_target_subdir}" != "."; then
30 libgcc_topdir="${srcdir}/${with_multisrctop}../.."
32 libgcc_topdir="${srcdir}/${with_multisrctop}.."
36 libgcc_topdir="${srcdir}/.."
38 AC_SUBST(libgcc_topdir)
39 AC_CONFIG_AUX_DIR($libgcc_topdir)
42 [ --disable-shared don't provide a shared libgcc],
44 case $enable_shared in
48 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
49 for pkg in $enableval; do
50 if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
57 ], [enable_shared=yes])
58 AC_SUBST(enable_shared)
60 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
61 AC_ARG_ENABLE(version-specific-runtime-libs,
62 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
64 yes) version_specific_libs=yes ;;
65 no) version_specific_libs=no ;;
66 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
68 [version_specific_libs=no])
69 AC_MSG_RESULT($version_specific_libs)
72 [ --with-slibdir=DIR shared libraries in DIR [LIBDIR]],
73 slibdir="$with_slibdir",
74 if test "${version_specific_libs}" = yes; then
75 slibdir='$(libsubdir)'
76 elif test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
77 slibdir='$(exec_prefix)/$(host_noncanonical)/lib'
83 # Command-line options.
84 # Very limited version of AC_MAINTAINER_MODE.
85 AC_ARG_ENABLE([maintainer-mode],
86 [AC_HELP_STRING([--enable-maintainer-mode],
87 [enable make rules and dependencies not useful (and
88 sometimes confusing) to the casual installer])],
89 [case ${enable_maintainer_mode} in
92 *) AC_MSG_ERROR([--enable-maintainer-mode must be yes or no]) ;;
94 maintainer_mode=${enableval}],
101 # We need awk; bail out if it's missing.
103 "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
107 ACX_NONCANONICAL_HOST
108 ACX_NONCANONICAL_TARGET
111 # Calculate toolexeclibdir
112 # Also toolexecdir, though it's only used in toolexeclibdir
113 case ${version_specific_libs} in
115 # Need the gcc compiler version to know where to install libraries
116 # and header files if --enable-version-specific-runtime-libs option
118 toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
119 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
122 if test -n "$with_cross_host" &&
123 test x"$with_cross_host" != x"no"; then
124 # Install a library built with a cross compiler in tooldir, not libdir.
125 toolexecdir='$(exec_prefix)/$(target_noncanonical)'
126 toolexeclibdir='$(toolexecdir)/lib'
128 toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
129 toolexeclibdir='$(libdir)'
131 multi_os_directory=`$CC -print-multi-os-directory`
132 case $multi_os_directory in
133 .) ;; # Avoid trailing /.
134 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
138 AC_SUBST(toolexecdir)
139 AC_SUBST(toolexeclibdir)
141 dnl These must be called before AM_PROG_LIBTOOL, because it may want
142 dnl to call AC_CHECK_PROG.
143 AC_CHECK_TOOL(AR, ar)
144 AC_CHECK_TOOL(LIPO, lipo, :)
145 AC_CHECK_TOOL(NM, nm)
146 AC_CHECK_TOOL(RANLIB, ranlib, :)
147 AC_CHECK_TOOL(STRIP, strip, :)
154 # Check for decimal float support.
155 AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp],
156 [AC_COMPILE_IFELSE([_Decimal32 x;], [libgcc_cv_dfp=yes],
157 [libgcc_cv_dfp=no])])
158 decimal_float=$libgcc_cv_dfp
159 AC_SUBST(decimal_float)
161 GCC_AC_ENABLE_DECIMAL_FLOAT([$host])
163 # Check for fixed-point support.
164 AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point],
165 [AC_COMPILE_IFELSE([_Sat _Fract x;], [libgcc_cv_fixed_point=yes],
166 [libgcc_cv_fixed_point=no])])
167 fixed_point=$libgcc_cv_fixed_point
168 AC_SUBST(fixed_point)
172 AC_MSG_CHECKING([for thread model used by GCC])
173 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
174 AC_MSG_RESULT([$target_thread_file])
176 # Check for assembler CFI support.
177 AC_CACHE_CHECK([whether assembler supports CFI directives], [libgcc_cv_cfi],
182 .cfi_personality 0, symbol\n\
185 [libgcc_cv_cfi=no])])
187 # Check 32bit or 64bit for x86.
189 i?86*-*-* | x86_64*-*-*)
190 cat > conftest.c <<EOF
197 eval `${CC-cc} -E conftest.c | grep host_address=`
202 # Collect host-machine-specific information.
203 . ${srcdir}/config.host
205 # Check if Solaris/x86 linker supports ZERO terminator unwind entries.
206 # This is after config.host so we can augment tmake_file.
207 # Link with -nostartfiles -nodefaultlibs since neither are present while
211 cat > conftest.s <<EOF
212 .section .eh_frame,"a",@unwind
214 .section .jcr,"aw",@progbits
217 if AC_TRY_COMMAND(${CC-cc} -shared -nostartfiles -nodefaultlibs -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD); then
218 # configure expects config files in libgcc/config, so need a relative
220 tmake_file="${tmake_file} ../../gcc/config/i386/t-crtstuff"
225 # Check for visibility support. This is after config.host so that
226 # we can check for asm_hidden_op.
227 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
228 libgcc_cv_hidden_visibility_attribute, [
229 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c
230 libgcc_cv_hidden_visibility_attribute=no
231 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
232 if grep "\\$asm_hidden_op.*foo" conftest.s >/dev/null; then
233 libgcc_cv_hidden_visibility_attribute=yes
239 if test $libgcc_cv_hidden_visibility_attribute = yes; then
240 vis_hide='-fvisibility=hidden -DHIDE_EXPORTS'
246 # See if we have thread-local storage. We can only test assembler
247 # sicne link-time and run-time tests require the newly built
248 # gcc, which can't be used to build executable due to that libgcc
249 # is yet to be built here.
252 if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then
253 set_have_cc_tls="-DHAVE_CC_TLS"
255 AC_SUBST(set_have_cc_tls)
257 # See if we have emulated thread-local storage.
260 if test "$enable_tls $gcc_cv_use_emutls" = "yes yes"; then
261 set_use_emutls="-DUSE_EMUTLS"
263 AC_SUBST(set_use_emutls)
265 # Conditionalize the makefile for this target machine.
267 for f in ${tmake_file}
269 if test -f ${srcdir}/config/$f
271 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
274 tmake_file="${tmake_file_}"
277 # Substitute configuration variables
279 AC_SUBST(extra_parts)
280 AC_SUBST(asm_hidden_op)
281 AC_CONFIG_LINKS([md-unwind-support.h:config/$md_unwind_header])
283 # We need multilib support.
284 AC_CONFIG_FILES([Makefile])
285 AC_CONFIG_COMMANDS([default],
286 [[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
287 if test -n "$CONFIG_FILES"; then
288 # FIXME: We shouldn't need to set ac_file
290 . ${libgcc_topdir}/config-ml.in
294 with_target_subdir=${with_target_subdir}
295 with_multisubdir=${with_multisubdir}
296 ac_configure_args="--enable-multilib ${ac_configure_args}"
297 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
298 libgcc_topdir=${libgcc_topdir}