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/override.m4)
8 sinclude(../config/dfp.m4)
11 AC_INIT([GNU C Runtime Library], 1.0,,[libgcc])
12 AC_CONFIG_SRCDIR([static-object.mk])
14 AC_ARG_WITH(target-subdir,
15 [ --with-target-subdir=SUBDIR Configuring in a subdirectory for target])
16 AC_ARG_WITH(cross-host,
17 [ --with-cross-host=HOST Configuring with a cross compiler])
19 [ --with-ld arrange to use the specified ld (full pathname)])
21 if test "${srcdir}" = "."; then
22 if test -n "${with_build_subdir}"; then
23 libgcc_topdir="${srcdir}/../.."
25 elif test -z "${with_target_subdir}"; then
26 libgcc_topdir="${srcdir}/.."
28 if test "${with_target_subdir}" != "."; then
29 libgcc_topdir="${srcdir}/${with_multisrctop}../.."
31 libgcc_topdir="${srcdir}/${with_multisrctop}.."
35 libgcc_topdir="${srcdir}/.."
37 AC_SUBST(libgcc_topdir)
38 AC_CONFIG_AUX_DIR($libgcc_topdir)
41 [ --disable-shared don't provide a shared libgcc],
43 case $enable_shared in
47 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
48 for pkg in $enableval; do
49 if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
56 ], [enable_shared=yes])
57 AC_SUBST(enable_shared)
59 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
60 AC_ARG_ENABLE(version-specific-runtime-libs,
61 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
63 yes) version_specific_libs=yes ;;
64 no) version_specific_libs=no ;;
65 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
67 [version_specific_libs=no])
68 AC_MSG_RESULT($version_specific_libs)
71 [ --with-slibdir=DIR shared libraries in DIR [LIBDIR]],
72 slibdir="$with_slibdir",
73 if test "${version_specific_libs}" = yes; then
74 slibdir='$(libsubdir)'
75 elif test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
76 slibdir='$(exec_prefix)/$(host_noncanonical)/lib'
82 # Command-line options.
83 # Very limited version of AC_MAINTAINER_MODE.
84 AC_ARG_ENABLE([maintainer-mode],
85 [AC_HELP_STRING([--enable-maintainer-mode],
86 [enable make rules and dependencies not useful (and
87 sometimes confusing) to the casual installer])],
88 [case ${enable_maintainer_mode} in
91 *) AC_MSG_ERROR([--enable-maintainer-mode must be yes or no]) ;;
93 maintainer_mode=${enableval}],
100 # We need awk; bail out if it's missing.
102 "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
106 ACX_NONCANONICAL_HOST
109 dnl These must be called before AM_PROG_LIBTOOL, because it may want
110 dnl to call AC_CHECK_PROG.
111 AC_CHECK_TOOL(AR, ar)
112 AC_CHECK_TOOL(LIPO, lipo, :)
113 AC_CHECK_TOOL(NM, nm)
114 AC_CHECK_TOOL(RANLIB, ranlib, :)
115 AC_CHECK_TOOL(STRIP, strip, :)
122 # Check for decimal float support.
123 AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp],
124 [AC_COMPILE_IFELSE([_Decimal32 x;], [libgcc_cv_dfp=yes],
125 [libgcc_cv_dfp=no])])
126 decimal_float=$libgcc_cv_dfp
127 AC_SUBST(decimal_float)
129 GCC_AC_ENABLE_DECIMAL_FLOAT([$host])
131 # Check for fixed-point support.
132 AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point],
133 [AC_COMPILE_IFELSE([_Sat _Fract x;], [libgcc_cv_fixed_point=yes],
134 [libgcc_cv_fixed_point=no])])
135 fixed_point=$libgcc_cv_fixed_point
136 AC_SUBST(fixed_point)
138 # Check for assembler CFI support.
139 AC_CACHE_CHECK([whether assembler supports CFI directives], [libgcc_cv_cfi],
140 [AC_COMPILE_IFELSE([int i = __GCC_HAVE_DWARF2_CFI_ASM;],
142 [libgcc_cv_cfi=no])])
144 # Check 32bit or 64bit for x86.
146 i?86*-*-* | x86_64*-*-*)
147 cat > conftest.c <<EOF
154 eval `${CC-cc} -E conftest.c | grep host_address=`
159 # Collect host-machine-specific information.
160 . ${srcdir}/config.host
162 # Check if Solaris/x86 linker supports ZERO terminator unwind entries.
163 # This is after config.host so we can augment tmake_file.
164 # Link with -nostartfiles -nodefaultlibs since neither are present while
167 i?86-*-solaris2.1[[0-9]]*)
168 cat > conftest.s <<EOF
169 .section .eh_frame,"a",@unwind
171 .section .jcr,"aw",@progbits
174 if AC_TRY_COMMAND(${CC-cc} -shared -nostartfiles -nodefaultlibs -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD); then
175 # configure expects config files in libgcc/config, so need a relative
177 tmake_file="${tmake_file} ../../gcc/config/i386/t-crtstuff"
182 # Check for visibility support. This is after config.host so that
183 # we can check for asm_hidden_op.
184 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
185 libgcc_cv_hidden_visibility_attribute, [
186 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c
187 libgcc_cv_hidden_visibility_attribute=no
188 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
189 if grep "\\$asm_hidden_op.*foo" conftest.s >/dev/null; then
190 libgcc_cv_hidden_visibility_attribute=yes
196 if test $libgcc_cv_hidden_visibility_attribute = yes; then
197 vis_hide='-fvisibility=hidden -DHIDE_EXPORTS'
203 # See if we have thread-local storage. We can only test assembler
204 # sicne link-time and run-time tests require the newly built
205 # gcc, which can't be used to build executable due to that libgcc
206 # is yet to be built here.
209 if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then
210 set_have_cc_tls="-DHAVE_CC_TLS"
212 AC_SUBST(set_have_cc_tls)
214 # See if we have emulated thread-local storage.
217 if test "$enable_tls $gcc_cv_use_emutls" = "yes yes"; then
218 set_use_emutls="-DUSE_EMUTLS"
220 AC_SUBST(set_use_emutls)
222 # Conditionalize the makefile for this target machine.
224 for f in ${tmake_file}
226 if test -f ${srcdir}/config/$f
228 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
231 tmake_file="${tmake_file_}"
234 # Substitute configuration variables
235 AC_SUBST(extra_parts)
236 AC_SUBST(asm_hidden_op)
238 # We need multilib support.
239 AC_CONFIG_FILES([Makefile])
240 AC_CONFIG_COMMANDS([default],
241 [[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
242 if test -n "$CONFIG_FILES"; then
243 # FIXME: We shouldn't need to set ac_file
245 . ${libgcc_topdir}/config-ml.in
249 with_target_subdir=${with_target_subdir}
250 with_multisubdir=${with_multisubdir}
251 ac_configure_args="--enable-multilib ${ac_configure_args}"
252 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
253 libgcc_topdir=${libgcc_topdir}