2N/A# strndup.m4 serial 18

2N/Adnl Copyright (C) 2002-2003, 2005-2010 Free Software Foundation, Inc.

2N/Adnl This file is free software; the Free Software Foundation

2N/Adnl gives unlimited permission to copy and/or distribute it,

2N/Adnl with or without modifications, as long as this notice is preserved.

2N/A

2N/AAC_DEFUN([gl_FUNC_STRNDUP],

2N/A[

2N/A dnl Persuade glibc <string.h> to declare strndup().

2N/A AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])

2N/A

2N/A AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles

2N/A AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])

2N/A AC_CHECK_DECLS_ONCE([strndup])

2N/A AC_CHECK_FUNCS_ONCE([strndup])

2N/A if test $ac_cv_have_decl_strndup = no; then

2N/A HAVE_DECL_STRNDUP=0

2N/A fi

2N/A

2N/A if test $ac_cv_func_strndup = yes; then

2N/A # AIX 4.3.3, AIX 5.1 have a function that fails to add the terminating '\0'.

2N/A AC_CACHE_CHECK([for working strndup], [gl_cv_func_strndup_works],

2N/A [AC_RUN_IFELSE([

2N/A AC_LANG_PROGRAM([[#include <string.h>

2N/A #include <stdlib.h>]], [[

2N/A#ifndef HAVE_DECL_STRNDUP

2N/A extern char *strndup (const char *, size_t);

2N/A#endif

2N/A char *s;

2N/A s = strndup ("some longer string", 15);

2N/A free (s);

2N/A s = strndup ("shorter string", 13);

2N/A return s[13] != '\0';]])],

2N/A [gl_cv_func_strndup_works=yes],

2N/A [gl_cv_func_strndup_works=no],

2N/A [

2N/Achangequote(,)dnl

2N/A case $host_os in

2N/A aix | aix[3-6]*) gl_cv_func_strndup_works="guessing no";;

2N/A *) gl_cv_func_strndup_works="guessing yes";;

2N/A esac

2N/Achangequote([,])dnl

2N/A ])])

2N/A case $gl_cv_func_strndup_works in

2N/A *no)

2N/A REPLACE_STRNDUP=1

2N/A AC_LIBOBJ([strndup])

2N/A ;;

2N/A esac

2N/A else

2N/A AC_LIBOBJ([strndup])

2N/A fi

2N/A])