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view m4/strndup.m4 @ 269:6cbc409ff09f 2.6
Added asprintf redux
author | lost |
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date | Tue, 22 Dec 2009 05:53:05 +0000 |
parents | bec6d2480f08 |
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# strndup.m4 serial 16 dnl Copyright (C) 2002-2003, 2005-2009 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], [:])