readelf: avoid shadowing a libiberty symbol

[deliverable/binutils-gdb.git] / libiberty / aclocal.m4

diff --git a/libiberty/aclocal.m4 b/libiberty/aclocal.m4
index b6a38d6052273f6b4e578ae0bd4f012e1f470919..bf8a907100f9d2107df899e538e6a47f6fcd3058 100644 (file)
--- a/libiberty/aclocal.m4
+++ b/libiberty/aclocal.m4
@@ -1,3 +1,9 @@
+sinclude(../config/acx.m4)
+sinclude(../config/no-executables.m4)
+sinclude(../config/override.m4)
+sinclude(../config/picflag.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
 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


@@ -47,6 +53,9 @@ main ()
   
   p = (char *) mmap (0, MAP_LEN, PROT_READ|PROT_WRITE,
                     MAP_ANON|MAP_PRIVATE, dev_zero, 0);
   
   p = (char *) mmap (0, MAP_LEN, PROT_READ|PROT_WRITE,
                     MAP_ANON|MAP_PRIVATE, dev_zero, 0);

+  if (p == (char *)-1)
+    p = (char *) mmap (0, MAP_LEN, PROT_READ|PROT_WRITE,
+                      MAP_ANON|MAP_PRIVATE, -1, 0);

   if (p == (char *)-1)
     exit (2);
   else
   if (p == (char *)-1)
     exit (2);
   else


@@ -63,9 +72,104 @@ main ()
   exit (0);
 }
 ], ac_cv_func_strncmp_works=yes, ac_cv_func_strncmp_works=no,
   exit (0);
 }
 ], ac_cv_func_strncmp_works=yes, ac_cv_func_strncmp_works=no,

-  ac_cv_func_strncmp_works=no)
+  ac_cv_func_strncmp_works=yes)

 rm -f core core.* *.core])
 if test $ac_cv_func_strncmp_works = no ; then
 rm -f core core.* *.core])
 if test $ac_cv_func_strncmp_works = no ; then

-  LIBOBJS="$LIBOBJS strncmp.o"
+  AC_LIBOBJ([strncmp])
+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
+])
+
+dnl See whether we need a declaration for a function.
+AC_DEFUN(libiberty_NEED_DECLARATION,
+[AC_MSG_CHECKING([whether $1 must be declared])
+AC_CACHE_VAL(libiberty_cv_decl_needed_$1,
+[AC_TRY_COMPILE([
+#include "confdefs.h"
+#include <stdio.h>
+#ifdef HAVE_STRING_H
+#include <string.h>
+#else
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif],
+[char *(*pfn) = (char *(*)) $1],
+libiberty_cv_decl_needed_$1=no, libiberty_cv_decl_needed_$1=yes)])
+AC_MSG_RESULT($libiberty_cv_decl_needed_$1)
+if test $libiberty_cv_decl_needed_$1 = yes; then
+  AC_DEFINE([NEED_DECLARATION_]translit($1, [a-z], [A-Z]), 1,
+            [Define if $1 is not declared in system header files.])

 fi
 fi

+])dnl
+
+# 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])

 ])
 ])