Index: bison/src/bison/2.4.1/bison-2.4.1-src/m4/strndup.m4 |
=================================================================== |
--- bison/src/bison/2.4.1/bison-2.4.1-src/m4/strndup.m4 (revision 0) |
+++ bison/src/bison/2.4.1/bison-2.4.1-src/m4/strndup.m4 (revision 0) |
@@ -0,0 +1,53 @@ |
+# strndup.m4 serial 15 |
+dnl Copyright (C) 2002-2003, 2005-2008 Free Software Foundation, Inc. |
+dnl This file is free software; the Free Software Foundation |
+dnl gives unlimited permission to copy and/or distribute it, |
+dnl with or without modifications, as long as this notice is preserved. |
+ |
+AC_DEFUN([gl_FUNC_STRNDUP], |
+[ |
+ dnl Persuade glibc <string.h> to declare strndup(). |
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) |
+ |
+ AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS]) |
+ AC_CHECK_DECLS_ONCE([strndup]) |
+ if test $ac_cv_have_decl_strndup = no; then |
+ HAVE_DECL_STRNDUP=0 |
+ fi |
+ |
+ # AIX 4.3.3, AIX 5.1 have a function that fails to add the terminating '\0'. |
+ AC_CACHE_CHECK([for working strndup], gl_cv_func_strndup, |
+ [AC_RUN_IFELSE([ |
+ AC_LANG_PROGRAM([[#include <string.h> |
+ #include <stdlib.h>]], [[ |
+#ifndef HAVE_DECL_STRNDUP |
+ extern char *strndup (const char *, size_t); |
+#endif |
+ char *s; |
+ s = strndup ("some longer string", 15); |
+ free (s); |
+ s = strndup ("shorter string", 13); |
+ return s[13] != '\0';]])], |
+ [gl_cv_func_strndup=yes], |
+ [gl_cv_func_strndup=no], |
+ [AC_CHECK_FUNC([strndup], |
+ [AC_EGREP_CPP([too risky], [ |
+#ifdef _AIX |
+ too risky |
+#endif |
+ ], |
+ [gl_cv_func_strndup=no], |
+ [gl_cv_func_strndup=yes])], |
+ [gl_cv_func_strndup=no])])]) |
+ if test $gl_cv_func_strndup = yes; then |
+ AC_DEFINE([HAVE_STRNDUP], 1, |
+ [Define if you have the strndup() function and it works.]) |
+ else |
+ HAVE_STRNDUP=0 |
+ AC_LIBOBJ([strndup]) |
+ gl_PREREQ_STRNDUP |
+ fi |
+]) |
+ |
+# Prerequisites of lib/strndup.c. |
+AC_DEFUN([gl_PREREQ_STRNDUP], [:]) |