+sinclude(../config/acx.m4)
+sinclude(../config/no-executables.m4)
+sinclude(../config/override.m4)
+sinclude(../config/warnings.m4)
+
dnl See whether strncmp reads past the end of its string parameters.
dnl On some versions of SunOS4 at least, strncmp reads a word at a time
dnl but erroneously reads past the end of strings. This can cause
ac_cv_func_strncmp_works=no)
rm -f core core.* *.core])
if test $ac_cv_func_strncmp_works = no ; then
- LIBOBJS="$LIBOBJS strncmp.o"
+ AC_LIBOBJ([strncmp])
fi
])
fi
])dnl
-# FIXME: We temporarily define our own version of AC_PROG_CC. This is
-# copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS. We
-# are probably using a cross compiler, which will not be able to fully
-# link an executable. This should really be fixed in autoconf
-# itself.
-
-AC_DEFUN(LIB_AC_PROG_CC,
-[AC_BEFORE([$0], [AC_PROG_CPP])dnl
-AC_PROVIDE([AC_PROG_CC])
-AC_CHECK_PROG(CC, gcc, gcc)
-if test -z "$CC"; then
- AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
- test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
-fi
-
-AC_PROG_CC_GNU
-
-if test $ac_cv_prog_gcc = yes; then
- GCC=yes
- ac_libiberty_warn_cflags='-W -Wall -Wtraditional -pedantic'
-dnl Check whether -g works, even if CFLAGS is set, in case the package
-dnl plays around with CFLAGS (such as to build both debugging and
-dnl normal versions of a library), tasteless as that idea is.
- ac_test_CFLAGS="${CFLAGS+set}"
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS=
- AC_PROG_CC_G
- if test "$ac_test_CFLAGS" = set; then
- CFLAGS="$ac_save_CFLAGS"
- elif test $ac_cv_prog_cc_g = yes; then
- CFLAGS="-g -O2"
- else
- CFLAGS="-O2"
- fi
-else
- GCC=
- ac_libiberty_warn_cflags=
- test "${CFLAGS+set}" = set || CFLAGS="-g"
-fi
-AC_SUBST(ac_libiberty_warn_cflags)
-])
-
-# Work around a bug in autoheader. This can go away when we switch to
-# autoconf >2.50. The use of define instead of AC_DEFUN is
-# deliberate.
-define(AC_DEFINE_NOAUTOHEADER,
-[cat >> confdefs.h <<\EOF
-[#define] $1 ifelse($#, 2, [$2], $#, 3, [$2], 1)
-EOF
-])
-
# We always want a C version of alloca() compiled into libiberty,
# because native-compiler support for the real alloca is so !@#$%
# unreliable that GCC has decided to use it only when being compiled
STACK_DIRECTION < 0 => grows toward lower addresses
STACK_DIRECTION = 0 => direction of growth unknown])
])
+
+# AC_LANG_FUNC_LINK_TRY(C)(FUNCTION)
+# ----------------------------------
+# Don't include <ctype.h> because on OSF/1 3.0 it includes
+# <sys/types.h> which includes <sys/select.h> which contains a
+# prototype for select. Similarly for bzero.
+#
+# This test used to merely assign f=$1 in main(), but that was
+# optimized away by HP unbundled cc A.05.36 for ia64 under +O3,
+# presumably on the basis that there's no need to do that store if the
+# program is about to exit. Conversely, the AIX linker optimizes an
+# unused external declaration that initializes f=$1. So this test
+# program has both an external initialization of f, and a use of f in
+# main that affects the exit status.
+#
+m4_define([AC_LANG_FUNC_LINK_TRY(C)],
+[AC_LANG_PROGRAM(
+[/* System header to define __stub macros and hopefully few prototypes,
+ which can conflict with char $1 (); below.
+ Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+ <limits.h> exists even on freestanding compilers. Under hpux,
+ including <limits.h> includes <sys/time.h> and causes problems
+ checking for functions defined therein. */
+#if defined (__STDC__) && !defined (_HPUX_SOURCE)
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+/* Override any gcc2 internal prototype to avoid an error. */
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+/* We use char because int might match the return type of a gcc2
+ builtin and then its argument prototype would still apply. */
+char $1 ();
+/* The GNU C library defines this for functions which it implements
+ to always fail with ENOSYS. Some functions are actually named
+ something starting with __ and the normal name is an alias. */
+#if defined (__stub_$1) || defined (__stub___$1)
+choke me
+#else
+char (*f) () = $1;
+#endif
+#ifdef __cplusplus
+}
+#endif
+], [return f != $1;])])
+
OSDN Git Service
