sinclude(../config/tls.m4)
sinclude(../config/acx.m4)
sinclude(../config/no-executables.m4)
+sinclude(../config/lib-ld.m4)
sinclude(../config/override.m4)
+sinclude(../config/picflag.m4)
+sinclude(../config/dfp.m4)
+sinclude(../config/unwind_ipinfo.m4)
AC_PREREQ(2.64)
AC_INIT([GNU C Runtime Library], 1.0,,[libgcc])
AC_CONFIG_SRCDIR([static-object.mk])
+# The libgcc should not depend on any header files
+AC_DEFUN([_AC_INCLUDES_DEFAULT_REQUIREMENTS],
+ [m4_divert_text([DEFAULTS],
+ [ac_includes_default='/* none */'])])
+
AC_ARG_WITH(target-subdir,
[ --with-target-subdir=SUBDIR Configuring in a subdirectory for target])
AC_ARG_WITH(cross-host,
], [enable_shared=yes])
AC_SUBST(enable_shared)
+GCC_PICFLAG
+AC_SUBST(PICFLAG)
+
AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
AC_ARG_ENABLE(version-specific-runtime-libs,
[ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
AC_CANONICAL_HOST
ACX_NONCANONICAL_HOST
+ACX_NONCANONICAL_TARGET
GCC_TOPLEV_SUBDIRS
+# Calculate toolexeclibdir
+# Also toolexecdir, though it's only used in toolexeclibdir
+case ${version_specific_libs} in
+ yes)
+ # Need the gcc compiler version to know where to install libraries
+ # and header files if --enable-version-specific-runtime-libs option
+ # is selected.
+ toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
+ toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
+ ;;
+ no)
+ if test -n "$with_cross_host" &&
+ test x"$with_cross_host" != x"no"; then
+ # Install a library built with a cross compiler in tooldir, not libdir.
+ toolexecdir='$(exec_prefix)/$(target_noncanonical)'
+ toolexeclibdir='$(toolexecdir)/lib'
+ else
+ toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
+ toolexeclibdir='$(libdir)'
+ fi
+ multi_os_directory=`$CC -print-multi-os-directory`
+ case $multi_os_directory in
+ .) ;; # Avoid trailing /.
+ *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
+ esac
+ ;;
+esac
+AC_SUBST(toolexecdir)
+AC_SUBST(toolexeclibdir)
+
dnl These must be called before AM_PROG_LIBTOOL, because it may want
dnl to call AC_CHECK_PROG.
AC_CHECK_TOOL(AR, ar)
AC_PROG_CC
AC_PROG_CPP_WERROR
+AC_CHECK_SIZEOF([double])
+AC_CHECK_SIZEOF([long double])
+AS_VAR_ARITH([double_type_size], [$ac_cv_sizeof_double \* 8])
+AS_VAR_ARITH([long_double_type_size], [$ac_cv_sizeof_long_double \* 8])
+AC_SUBST(double_type_size)
+AC_SUBST(long_double_type_size)
+
# Check for decimal float support.
AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp],
[AC_COMPILE_IFELSE([_Decimal32 x;], [libgcc_cv_dfp=yes],
decimal_float=$libgcc_cv_dfp
AC_SUBST(decimal_float)
-AC_ARG_ENABLE(decimal-float,
-[ --enable-decimal-float={no,yes,bid,dpd}
- enable decimal float extension to C. Selecting 'bid'
- or 'dpd' choses which decimal floating point format
- to use],
-[
- case $enable_decimal_float in
- yes | no | bid | dpd) ;;
- *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.
-Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
- esac
-],
-[
- case $host in
- powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux*)
- enable_decimal_float=yes
- ;;
- *)
- enable_decimal_float=no
- ;;
- esac
-])
-
-# x86's use BID format instead of DPD
-if test x$enable_decimal_float = xyes; then
- case $host in
- i?86*-*-linux* | x86_64*-*-linux*)
- enable_decimal_float=bid
- ;;
- *)
- enable_decimal_float=dpd
- ;;
- esac
-fi
-AC_SUBST(enable_decimal_float)
+GCC_AC_ENABLE_DECIMAL_FLOAT([$host])
# Check for fixed-point support.
AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point],
fixed_point=$libgcc_cv_fixed_point
AC_SUBST(fixed_point)
-# Check 32bit or 64bit for x86.
-case ${host} in
-i?86*-*-* | x86_64*-*-*)
- cat > conftest.c <<EOF
-#ifdef __x86_64__
+# For platforms with the unwind ABI which includes an unwind library,
+# libunwind, we can choose to use the system libunwind.
+# config.gcc also contains tests of with_system_libunwind.
+GCC_CHECK_UNWIND_GETIPINFO
+
+# The sjlj test is almost duplicated here and in libgo/configure.ac (for C),
+# libstdc++-v3/acinclude.m4 and libjava/configure.ac (for C++), and
+# libobjc/configure.ac (for Objective-C).
+# FIXME: This should be centralized in config/sjlj.m4.
+AC_ARG_ENABLE(sjlj-exceptions,
+ AC_HELP_STRING([--enable-sjlj-exceptions],
+ [force use of builtin_setjmp for exceptions]),
+ [case "$enableval" in
+ yes|no|auto) ;;
+ *) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;;
+ esac],
+ [enable_sjlj_exceptions=auto])
+
+AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions],
+[libgcc_cv_lib_sjlj_exceptions],
+[AC_LANG_CONFTEST(
+ [AC_LANG_SOURCE([
+void bar ();
+void clean (int *);
+void foo ()
+{
+ int i __attribute__ ((cleanup (clean)));
+ bar();
+}
+])])
+CFLAGS_hold=$CFLAGS
+CFLAGS="--save-temps -fexceptions"
+libgcc_cv_lib_sjlj_exceptions=unknown
+AS_IF([ac_fn_c_try_compile],
+ [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
+ libgcc_cv_lib_sjlj_exceptions=yes
+ elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
+ libgcc_cv_lib_sjlj_exceptions=no
+ fi])
+CFLAGS=$CFLAGS_hold
+rm -f conftest*
+])
+
+if test "$enable_sjlj_exceptions" = "auto"; then
+ enable_sjlj_exceptions=$libgcc_cv_lib_sjlj_exceptions
+fi
+
+case $enable_sjlj_exceptions in
+yes)
+ AC_DEFINE(LIBGCC_SJLJ_EXCEPTIONS, 1,
+ [Define if the C compiler is configured for setjmp/longjmp exceptions.])
+ ;;
+no)
+ ;;
+*)
+ AC_MSG_ERROR([unable to detect exception model])
+ ;;
+esac
+
+AC_LIB_PROG_LD_GNU
+
+AC_MSG_CHECKING([for thread model used by GCC])
+target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
+AC_MSG_RESULT([$target_thread_file])
+
+# Check for assembler CFI support.
+AC_CACHE_CHECK([whether assembler supports CFI directives], [libgcc_cv_cfi],
+ [AC_COMPILE_IFELSE(
+[asm("\n\
+ .text\n\
+ .cfi_startproc\n\
+ .cfi_personality 0, symbol\n\
+ .cfi_endproc");],
+ [libgcc_cv_cfi=yes],
+ [libgcc_cv_cfi=no])])
+
+# Check 32bit or 64bit
+cat > conftest.c <<EOF
+#if defined(__x86_64__) || (!defined(__i386__) && defined(__LP64__))
host_address=64
#else
host_address=32
#endif
EOF
- eval `${CC-cc} -E conftest.c | grep host_address=`
- rm -f conftest.c
- ;;
-esac
+eval `${CC-cc} -E conftest.c | grep host_address=`
+rm -f conftest.c
# Collect host-machine-specific information.
. ${srcdir}/config.host
# Link with -nostartfiles -nodefaultlibs since neither are present while
# building libgcc.
case ${host} in
-i?86-*-solaris2.1[[0-9]]*)
+i?86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
cat > conftest.s <<EOF
.section .eh_frame,"a",@unwind
.zero 4
.zero 8
EOF
if AC_TRY_COMMAND(${CC-cc} -shared -nostartfiles -nodefaultlibs -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD); then
- # configure expects config files in libgcc/config, so need a relative
- # path here.
- tmake_file="${tmake_file} ../../gcc/config/i386/t-crtstuff"
+ tmake_file="${tmake_file} i386/t-crtstuff"
fi
;;
esac
fi
AC_SUBST(set_have_cc_tls)
+# See if we have emulated thread-local storage.
+GCC_CHECK_EMUTLS
+set_use_emutls=
+if test "$enable_tls $gcc_cv_use_emutls" = "yes yes"; then
+ set_use_emutls="-DUSE_EMUTLS"
+fi
+AC_SUBST(set_use_emutls)
+
+# Conditionalize the sfp-machine.h header for this target machine.
+if test -z "${sfp_machine_header}"; then
+ sfp_machine_header=$cpu_type/sfp-machine.h
+ if test -f ${srcdir}/config/${sfp_machine_header}; then
+ :
+ else
+ sfp_machine_header=no-sfp-machine.h
+ fi
+fi
+AC_SUBST(sfp_machine_header)
+
# Conditionalize the makefile for this target machine.
tmake_file_=
for f in ${tmake_file}
tmake_file="${tmake_file_}"
AC_SUBST(tmake_file)
+# Likewise export definitions for libgcc_tm.h
+tm_file_=
+for f in ${tm_file}
+do
+ tm_file_="${tm_file_} \$(srcdir)/config/$f"
+done
+tm_file="${tm_file_}"
+AC_SUBST(tm_file)
+AC_SUBST(tm_defines)
+
+# Map from thread model to thread header.
+case $target_thread_file in
+ aix) thread_header=config/rs6000/gthr-aix.h ;;
+ dce) thread_header=config/pa/gthr-dce.h ;;
+ lynx) thread_header=config/gthr-lynx.h ;;
+ mipssde) thread_header=config/mips/gthr-mipssde.h ;;
+ posix) thread_header=gthr-posix.h ;;
+ rtems) thread_header=config/gthr-rtems.h ;;
+ single) thread_header=gthr-single.h ;;
+ tpf) thread_header=config/s390/gthr-tpf.h ;;
+ vxworks) thread_header=config/gthr-vxworks.h ;;
+ win32) thread_header=config/i386/gthr-win32.h ;;
+esac
+
# Substitute configuration variables
+AC_SUBST(cpu_type)
AC_SUBST(extra_parts)
AC_SUBST(asm_hidden_op)
+AC_CONFIG_LINKS([enable-execute-stack.c:$enable_execute_stack])
+AC_CONFIG_LINKS([unwind.h:$unwind_header])
+AC_CONFIG_LINKS([md-unwind-support.h:config/$md_unwind_header])
+AC_CONFIG_LINKS([sfp-machine.h:config/$sfp_machine_header])
+AC_CONFIG_LINKS([gthr-default.h:$thread_header])
# We need multilib support.
AC_CONFIG_FILES([Makefile])
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