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)
9 AC_INIT([GNU C Runtime Library], 1.0,,[libgcc])
10 AC_CONFIG_SRCDIR([static-object.mk])
12 AC_ARG_WITH(target-subdir,
13 [ --with-target-subdir=SUBDIR Configuring in a subdirectory for target])
14 AC_ARG_WITH(cross-host,
15 [ --with-cross-host=HOST Configuring with a cross compiler])
17 [ --with-ld arrange to use the specified ld (full pathname)])
19 if test "${srcdir}" = "."; then
20 if test -n "${with_build_subdir}"; then
21 libgcc_topdir="${srcdir}/../.."
23 elif test -z "${with_target_subdir}"; then
24 libgcc_topdir="${srcdir}/.."
26 if test "${with_target_subdir}" != "."; then
27 libgcc_topdir="${srcdir}/${with_multisrctop}../.."
29 libgcc_topdir="${srcdir}/${with_multisrctop}.."
33 libgcc_topdir="${srcdir}/.."
35 AC_SUBST(libgcc_topdir)
36 AC_CONFIG_AUX_DIR($libgcc_topdir)
39 [ --disable-shared don't provide a shared libgcc],
41 case $enable_shared in
45 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
46 for pkg in $enableval; do
47 if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
54 ], [enable_shared=yes])
55 AC_SUBST(enable_shared)
57 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
58 AC_ARG_ENABLE(version-specific-runtime-libs,
59 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
61 yes) version_specific_libs=yes ;;
62 no) version_specific_libs=no ;;
63 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
65 [version_specific_libs=no])
66 AC_MSG_RESULT($version_specific_libs)
69 [ --with-slibdir=DIR shared libraries in DIR [LIBDIR]],
70 slibdir="$with_slibdir",
71 if test "${version_specific_libs}" = yes; then
72 slibdir='$(libsubdir)'
73 elif test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
74 slibdir='$(exec_prefix)/$(host_noncanonical)/lib'
83 # We need awk; bail out if it's missing.
85 "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
92 dnl These must be called before AM_PROG_LIBTOOL, because it may want
93 dnl to call AC_CHECK_PROG.
95 AC_CHECK_TOOL(LIPO, lipo, :)
97 AC_CHECK_TOOL(RANLIB, ranlib, :)
98 AC_CHECK_TOOL(STRIP, strip, :)
105 # Check for decimal float support.
106 AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp],
107 [AC_COMPILE_IFELSE([_Decimal32 x;], [libgcc_cv_dfp=yes],
108 [libgcc_cv_dfp=no])])
109 decimal_float=$libgcc_cv_dfp
110 AC_SUBST(decimal_float)
112 AC_ARG_ENABLE(decimal-float,
113 [ --enable-decimal-float={no,yes,bid,dpd}
114 enable decimal float extension to C. Selecting 'bid'
115 or 'dpd' choses which decimal floating point format
118 case $enable_decimal_float in
119 yes | no | bid | dpd) ;;
120 *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.
121 Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
126 powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux*)
127 enable_decimal_float=yes
130 enable_decimal_float=no
135 # x86's use BID format instead of DPD
136 if test x$enable_decimal_float = xyes; then
138 i?86*-*-linux* | x86_64*-*-linux*)
139 enable_decimal_float=bid
142 enable_decimal_float=dpd
146 AC_SUBST(enable_decimal_float)
148 # Check for fixed-point support.
149 AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point],
150 [AC_COMPILE_IFELSE([_Sat _Fract x;], [libgcc_cv_fixed_point=yes],
151 [libgcc_cv_fixed_point=no])])
152 fixed_point=$libgcc_cv_fixed_point
153 AC_SUBST(fixed_point)
155 # Collect host-machine-specific information.
156 . ${srcdir}/config.host
158 # Check for visibility support. This is after config.host so that
159 # we can check for asm_hidden_op.
160 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
161 libgcc_cv_hidden_visibility_attribute, [
162 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c
163 libgcc_cv_hidden_visibility_attribute=no
164 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
165 if grep "\\$asm_hidden_op.*foo" conftest.s >/dev/null; then
166 libgcc_cv_hidden_visibility_attribute=yes
172 if test $libgcc_cv_hidden_visibility_attribute = yes; then
173 vis_hide='-fvisibility=hidden -DHIDE_EXPORTS'
179 # See if we have thread-local storage. We can only test assembler
180 # sicne link-time and run-time tests require the newly built
181 # gcc, which can't be used to build executable due to that libgcc
182 # is yet to be built here.
185 if test "$enable_tls $have_cc_tls" = "yes yes"; then
186 set_have_cc_tls="-DHAVE_CC_TLS"
188 AC_SUBST(set_have_cc_tls)
190 # Conditionalize the makefile for this target machine.
192 for f in ${tmake_file}
194 if test -f ${srcdir}/config/$f
196 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
199 tmake_file="${tmake_file_}"
202 # Substitute configuration variables
203 AC_SUBST(extra_parts)
204 AC_SUBST(asm_hidden_op)
206 # We need multilib support.
207 AC_CONFIG_FILES([Makefile])
208 AC_CONFIG_COMMANDS([default],
209 [[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
210 if test -n "$CONFIG_FILES"; then
211 # FIXME: We shouldn't need to set ac_file
213 . ${libgcc_topdir}/config-ml.in
217 with_target_subdir=${with_target_subdir}
218 with_multisubdir=${with_multisubdir}
219 ac_configure_args="--enable-multilib ${ac_configure_args}"
220 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
221 libgcc_topdir=${libgcc_topdir}