# Do not delete or change the following two lines. For why, see
# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
AC_CANONICAL_SYSTEM
+ACX_NONCANONICAL_TARGET
+
target_alias=${target_alias-$host_alias}
+AC_SUBST(target_alias)
# Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
# following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
LIBGFOR_IS_NATIVE=true
fi
+AC_USE_SYSTEM_EXTENSIONS
+
# Calculate toolexeclibdir
# Also toolexecdir, though it's only used in toolexeclibdir
case ${version_specific_libs} in
# Create a spec file, so that compile/link tests don't fail
test -f libgfortran.spec || touch libgfortran.spec
+AC_LANG_C
# Check the compiler.
# The same as in boehm-gc and libstdc++. Have to borrow it from there.
# We must force CC to /not/ be precious variables; otherwise
AC_PROG_CC
m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
+AC_SUBST(CFLAGS)
+
+AM_PROG_CC_C_O
+
# Add -Wall -fno-repack-arrays -fno-underscoring if we are using GCC.
if test "x$GCC" = "xyes"; then
AM_FCFLAGS="-I . -Wall -Werror -fimplicit-none -fno-repack-arrays -fno-underscoring"
# Check for symbol versioning (copied from libssp).
AC_MSG_CHECKING([whether symbol versioning is supported])
-save_LDFLAGS="$LDFLAGS"
-LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map"
-cat > conftest.map <<EOF
+AC_ARG_ENABLE(symvers,
+AS_HELP_STRING([--disable-symvers],
+ [disable symbol versioning for libgfortran]),
+gfortran_use_symver=$enableval,
+gfortran_use_symver=yes)
+if test "x$gfortran_use_symver" != xno; then
+ save_LDFLAGS="$LDFLAGS"
+ LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map"
+ cat > conftest.map <<EOF
FOO_1.0 {
global: *foo*; bar; local: *;
};
EOF
-AC_TRY_LINK([int foo;],[],[gfortran_use_symver=gnu],[gfortran_use_symver=no])
-if test x$gfortran_use_symver = xno; then
- case "$target_os" in
- solaris2*)
- LDFLAGS="$save_LDFLAGS"
- LDFLAGS="$LDFLAGS -fPIC -shared -Wl,-M,./conftest.map"
- # Sun ld cannot handle wildcards and treats all entries as undefined.
- cat > conftest.map <<EOF
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foo;]],[[]])],[gfortran_use_symver=gnu],[gfortran_use_symver=no])
+ if test x$gfortran_use_symver = xno; then
+ case "$target_os" in
+ solaris2*)
+ LDFLAGS="$save_LDFLAGS"
+ LDFLAGS="$LDFLAGS -fPIC -shared -Wl,-M,./conftest.map"
+ # Sun ld cannot handle wildcards and treats all entries as undefined.
+ cat > conftest.map <<EOF
FOO_1.0 {
global: foo; local: *;
};
EOF
- AC_TRY_LINK([int foo;],[],[gfortran_use_symver=sun],[gfortran_use_symver=no])
- ;;
- esac
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foo;]],[[]])],[gfortran_use_symver=sun],[gfortran_use_symver=no])
+ ;;
+ esac
+ fi
+ LDFLAGS="$save_LDFLAGS"
fi
-LDFLAGS="$save_LDFLAGS"
AC_MSG_RESULT($gfortran_use_symver)
AM_CONDITIONAL(LIBGFOR_USE_SYMVER, [test "x$gfortran_use_symver" != xno])
AM_CONDITIONAL(LIBGFOR_USE_SYMVER_GNU, [test "x$gfortran_use_symver" = xgnu])
# Check for -ffunction-sections -fdata-sections
AC_MSG_CHECKING([for gcc that supports -ffunction-sections -fdata-sections])
CFLAGS='-Werror -ffunction-sections -fdata-sections'
-AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[int foo;]])], [ac_fdsections=yes], [ac_fdsections=no])
if test "$ac_test_CFLAGS" = set; then
CFLAGS="$ac_save_CFLAGS"
else
LIBGFOR_WORKING_GFORTRAN
AC_SYS_LARGEFILE
+
+# Types
AC_TYPE_OFF_T
+AC_TYPE_INTPTR_T
+AC_TYPE_UINTPTR_T
+AC_CHECK_TYPES([ptrdiff_t])
+
+# check header files (we assume C89 is available, so don't check for that)
+AC_CHECK_HEADERS_ONCE(unistd.h sys/time.h sys/times.h sys/resource.h \
+sys/types.h sys/stat.h sys/wait.h floatingpoint.h ieeefp.h fenv.h fptrap.h \
+pwd.h complex.h)
-# check header files
-AC_STDC_HEADERS
-AC_HEADER_TIME
-AC_HAVE_HEADERS(stdio.h stdlib.h string.h unistd.h signal.h stdarg.h)
-AC_CHECK_HEADERS(time.h sys/time.h sys/times.h sys/resource.h)
-AC_CHECK_HEADERS(sys/types.h sys/stat.h sys/wait.h floatingpoint.h ieeefp.h)
-AC_CHECK_HEADERS(fenv.h fptrap.h float.h execinfo.h pwd.h)
-AC_CHECK_HEADER([complex.h],[AC_DEFINE([HAVE_COMPLEX_H], [1], [complex.h exists])])
GCC_HEADER_STDINT(gstdint.h)
-AC_CHECK_MEMBERS([struct stat.st_blksize])
-AC_CHECK_MEMBERS([struct stat.st_blocks])
-AC_CHECK_MEMBERS([struct stat.st_rdev])
+AC_CHECK_MEMBERS([struct stat.st_blksize, struct stat.st_blocks, struct stat.st_rdev])
# Check for library functions.
-AC_CHECK_FUNCS(getrusage times mkstemp strtof strtold snprintf ftruncate chsize)
-AC_CHECK_FUNCS(chdir strerror getlogin gethostname kill link symlink perror)
-AC_CHECK_FUNCS(sleep time ttyname signal alarm ctime clock access fork execl)
-AC_CHECK_FUNCS(wait setmode execvp pipe dup2 close fdopen strcasestr getrlimit)
-AC_CHECK_FUNCS(gettimeofday stat fstat lstat getpwuid vsnprintf dup getcwd)
-AC_CHECK_FUNCS(localtime_r gmtime_r strerror_r getpwuid_r)
-
-# Check for glibc backtrace functions
-AC_CHECK_FUNCS(backtrace backtrace_symbols)
-
-# Check for types
-AC_CHECK_TYPES([intptr_t])
-AC_CHECK_TYPES([uintptr_t])
-
-# Check libc for getgid, getpid, getuid
-AC_CHECK_LIB([c],[getgid],[AC_DEFINE([HAVE_GETGID],[1],[libc includes getgid])])
-AC_CHECK_LIB([c],[getpid],[AC_DEFINE([HAVE_GETPID],[1],[libc includes getpid])])
-AC_CHECK_LIB([c],[getppid],[AC_DEFINE([HAVE_GETPPID],[1],[libc includes getppid])])
-AC_CHECK_LIB([c],[getuid],[AC_DEFINE([HAVE_GETUID],[1],[libc includes getuid])])
-AC_CHECK_LIB([c],[geteuid],[AC_DEFINE([HAVE_GETEUID],[1],[libc includes geteuid])])
+AC_CHECK_FUNCS_ONCE(getrusage times mkstemp strtof strtold snprintf \
+ftruncate chsize chdir getlogin gethostname kill link symlink sleep ttyname \
+alarm access fork execl wait setmode execve pipe dup2 close \
+strcasestr getrlimit gettimeofday stat fstat lstat getpwuid vsnprintf dup \
+getcwd localtime_r gmtime_r strerror_r getpwuid_r ttyname_r clock_gettime \
+readlink getgid getpid getppid getuid geteuid umask)
# Check for C99 (and other IEEE) math functions
AC_CHECK_LIB([m],[acosf],[AC_DEFINE([HAVE_ACOSF],[1],[libm includes acosf])])
# Check for GNU libc feenableexcept
AC_CHECK_LIB([m],[feenableexcept],[have_feenableexcept=yes AC_DEFINE([HAVE_FEENABLEEXCEPT],[1],[libm includes feenableexcept])])
+# At least for glibc and Tru64, clock_gettime is in librt. But don't
+# pull that in if it still doesn't give us the function we want. This
+# test is copied from libgomp, and modified to not link in -lrt as
+# libgfortran calls clock_gettime via a weak reference if it's found
+# in librt.
+if test $ac_cv_func_clock_gettime = no; then
+ AC_CHECK_LIB(rt, clock_gettime,
+ [AC_DEFINE(HAVE_CLOCK_GETTIME_LIBRT, 1,
+ [Define to 1 if you have the `clock_gettime' function in librt.])])
+fi
+
# Check for SysV fpsetmask
LIBGFOR_CHECK_FPSETMASK
IEEE_FLAGS="${ieee_flags}"
AC_SUBST(IEEE_FLAGS)
+
+# Check for POSIX getpwuid_r
+#
+# There are two versions of getpwuid_r, the POSIX one with 5
+# arguments, and another one with 4 arguments used by at least HP-UX
+# 10.2.
+if test "$ac_cv_func_getpwuid_r" = "yes"; then
+ AC_CACHE_CHECK([POSIX version of getpwuid_r with 5 arguments], libgfor_cv_posix_getpwuid_r, [
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([
+#include <stdio.h>
+#include <sys/types.h>
+#include <pwd.h>], [
+ getpwuid_r(0, NULL, NULL, 0, NULL);
+ ])], [libgfor_cv_posix_getpwuid_r="yes"], [libgfor_cv_posix_getpwuid_r="no"])])
+fi
+if test "$libgfor_cv_posix_getpwuid_r" = "yes"; then
+ AC_DEFINE([HAVE_POSIX_GETPWUID_R], [1], [Define to 1 if we have POSIX getpwuid_r which takes 5 arguments.])
+fi
+
+
# Check out attribute support.
LIBGFOR_CHECK_ATTRIBUTE_VISIBILITY
LIBGFOR_CHECK_ATTRIBUTE_DLLEXPORT
# Check out sync builtins support.
LIBGFOR_CHECK_SYNC_FETCH_AND_ADD
-# Check out thread support.
-LIBGFOR_CHECK_GTHR_DEFAULT
-
# Check out #pragma weak.
LIBGFOR_GTHREAD_WEAK
# Check whether line terminator is LF or CRLF
LIBGFOR_CHECK_CRLF
+# Check whether we have _Unwind_GetIPInfo for backtrace
+GCC_CHECK_UNWIND_GETIPINFO
+
AC_CACHE_SAVE
if test ${multilib} = yes; then
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