-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
-dnl a SEGV in some cases.
-AC_DEFUN(libiberty_AC_FUNC_STRNCMP,
-[AC_REQUIRE([AC_FUNC_MMAP])
-AC_CACHE_CHECK([for working strncmp], ac_cv_func_strncmp_works,
-[AC_TRY_RUN([
-/* Test by Jim Wilson and Kaveh Ghazi.
- Check whether strncmp reads past the end of its string parameters. */
-#include <sys/types.h>
-
-#ifdef HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
-
-#ifdef HAVE_SYS_MMAN_H
-#include <sys/mman.h>
-#endif
-
-#ifndef MAP_ANON
-#ifdef MAP_ANONYMOUS
-#define MAP_ANON MAP_ANONYMOUS
-#else
-#define MAP_ANON MAP_FILE
-#endif
-#endif
-
-#ifndef MAP_FILE
-#define MAP_FILE 0
-#endif
-#ifndef O_RDONLY
-#define O_RDONLY 0
-#endif
-
-#define MAP_LEN 0x10000
-
-main ()
-{
-#if defined(HAVE_MMAP) || defined(HAVE_MMAP_ANYWHERE)
- char *p;
- int dev_zero;
-
- dev_zero = open ("/dev/zero", O_RDONLY);
- if (dev_zero < 0)
- exit (1);
-
- p = (char *) mmap (0, MAP_LEN, PROT_READ|PROT_WRITE,
- MAP_ANON|MAP_PRIVATE, dev_zero, 0);
- if (p == (char *)-1)
- exit (2);
- else
- {
- char *string = "__si_type_info";
- char *q = (char *) p + MAP_LEN - strlen (string) - 2;
- char *r = (char *) p + 0xe;
-
- strcpy (q, string);
- strcpy (r, string);
- strncmp (r, q, 14);
- }
-#endif /* HAVE_MMAP || HAVE_MMAP_ANYWHERE */
- exit (0);
-}
-], ac_cv_func_strncmp_works=yes, ac_cv_func_strncmp_works=no,
- ac_cv_func_strncmp_works=no)
-rm -f core core.* *.core])
-if test $ac_cv_func_strncmp_works = no ; then
- LIBOBJS="$LIBOBJS strncmp.o"
-fi
-])
-
-dnl See if errno must be declared even when <errno.h> is included.
-AC_DEFUN(libiberty_AC_DECLARE_ERRNO,
-[AC_CACHE_CHECK(whether errno must be declared, libiberty_cv_declare_errno,
-[AC_TRY_COMPILE(
-[#include <errno.h>],
-[int x = errno;],
-libiberty_cv_declare_errno=no,
-libiberty_cv_declare_errno=yes)])
-if test $libiberty_cv_declare_errno = yes
-then AC_DEFINE(NEED_DECLARATION_ERRNO, 1,
- [Define if errno must be declared even when <errno.h> is included.])
-fi
-])
-
-# 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
-# by GCC. This is the part of AC_FUNC_ALLOCA that calculates the
-# information alloca.c needs.
-AC_DEFUN(libiberty_AC_FUNC_C_ALLOCA,
-[AC_CACHE_CHECK(whether alloca needs Cray hooks, ac_cv_os_cray,
-[AC_EGREP_CPP(webecray,
-[#if defined(CRAY) && ! defined(CRAY2)
-webecray
-#else
-wenotbecray
-#endif
-], ac_cv_os_cray=yes, ac_cv_os_cray=no)])
-if test $ac_cv_os_cray = yes; then
- for ac_func in _getb67 GETB67 getb67; do
- AC_CHECK_FUNC($ac_func,
- [AC_DEFINE_UNQUOTED(CRAY_STACKSEG_END, $ac_func,
- [Define to one of _getb67, GETB67, getb67 for Cray-2 and Cray-YMP
- systems. This function is required for alloca.c support on those
- systems.]) break])
- done
-fi
-
-AC_CACHE_CHECK(stack direction for C alloca, ac_cv_c_stack_direction,
-[AC_TRY_RUN([find_stack_direction ()
-{
- static char *addr = 0;
- auto char dummy;
- if (addr == 0)
- {
- addr = &dummy;
- return find_stack_direction ();
- }
- else
- return (&dummy > addr) ? 1 : -1;
-}
-main ()
-{
- exit (find_stack_direction() < 0);
-}],
- ac_cv_c_stack_direction=1,
- ac_cv_c_stack_direction=-1,
- ac_cv_c_stack_direction=0)])
-AC_DEFINE_UNQUOTED(STACK_DIRECTION, $ac_cv_c_stack_direction,
- [Define if you know the direction of stack growth for your system;
- otherwise it will be automatically deduced at run-time.
- STACK_DIRECTION > 0 => grows toward higher addresses
- STACK_DIRECTION < 0 => grows toward lower addresses
- STACK_DIRECTION = 0 => direction of growth unknown])
-])
+# generated automatically by aclocal 1.15.1 -*- Autoconf -*-
+
+# Copyright (C) 1996-2017 Free Software Foundation, Inc.
+
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])])
+m4_include([../config/acx.m4])
+m4_include([../config/cet.m4])
+m4_include([../config/enable.m4])
+m4_include([../config/gcc-plugin.m4])
+m4_include([../config/hwcaps.m4])
+m4_include([../config/no-executables.m4])
+m4_include([../config/override.m4])
+m4_include([../config/picflag.m4])
+m4_include([../config/warnings.m4])
+m4_include([acinclude.m4])
projects / thirdparty / gcc.git / blobdiff