+ # 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])