# Portability macros for glibc argz. -*- Autoconf -*-
-# Written by Gary V. Vaughan <gary@gnu.org>
-
-# Copyright (C) 2004, 2005 Free Software Foundation, Inc.
-
+#
+# Copyright (C) 2004-2011 Free Software Foundation, Inc.
+# Written by Gary V. Vaughan <gary@gnu.org>
+#
# This file is free software; the Free Software Foundation gives
# unlimited permission to copy and/or distribute it, with or without
# modifications, as long as this notice is preserved.
-# serial 3 argz.m4
+# serial 10 argz.m4
AC_DEFUN([gl_FUNC_ARGZ],
[gl_PREREQ_ARGZ
+AC_REQUIRE([AC_C_RESTRICT])
+
AC_CHECK_HEADERS([argz.h], [], [], [AC_INCLUDES_DEFAULT])
AC_CHECK_TYPES([error_t],
[],
[AC_DEFINE([error_t], [int],
- [Define to a type to use for `error_t' if it is not otherwise available.])],
+ [Define to a type to use for `error_t' if it is not otherwise available.])
+ AC_DEFINE([__error_t_defined], [1], [Define so that glibc/gnulib argp.h
+ does not typedef error_t.])],
[#if defined(HAVE_ARGZ_H)
# include <argz.h>
#endif])
ARGZ_H=
-AC_CHECK_FUNCS([argz_append argz_create_sep argz_insert argz_next \
- argz_stringify], [], [ARGZ_H=argz.h; AC_LIBOBJ([argz])])
+AC_CHECK_FUNC([argz_replace], [], [ARGZ_H=argz.h])
+
+dnl if have system argz functions, allow forced use of
+dnl libltdl-supplied implementation (and default to do so
+dnl on "known bad" systems). Could use a runtime check, but
+dnl (a) detecting malloc issues is notoriously unreliable
+dnl (b) only known system that declares argz functions,
+dnl provides them, yet they are broken, is cygwin
+dnl releases prior to 5-May-2007 (1.5.24 and earlier)
+dnl So, it's more straightforward simply to special case
+dnl this for known bad systems.
+AS_IF([test -z "$ARGZ_H"],
+ [AC_CACHE_CHECK(
+ [if argz actually works],
+ [lt_cv_sys_argz_works],
+ [[case $host_os in #(
+ *cygwin*)
+ lt_cv_sys_argz_works=no
+ if test "$cross_compiling" != no; then
+ lt_cv_sys_argz_works="guessing no"
+ else
+ lt_sed_extract_leading_digits='s/^\([0-9\.]*\).*/\1/'
+ save_IFS=$IFS
+ IFS=-.
+ set x `uname -r | sed -e "$lt_sed_extract_leading_digits"`
+ IFS=$save_IFS
+ lt_os_major=${2-0}
+ lt_os_minor=${3-0}
+ lt_os_micro=${4-0}
+ if test "$lt_os_major" -gt 1 \
+ || { test "$lt_os_major" -eq 1 \
+ && { test "$lt_os_minor" -gt 5 \
+ || { test "$lt_os_minor" -eq 5 \
+ && test "$lt_os_micro" -gt 24; }; }; }; then
+ lt_cv_sys_argz_works=yes
+ fi
+ fi
+ ;; #(
+ *) lt_cv_sys_argz_works=yes ;;
+ esac]])
+ AS_IF([test "$lt_cv_sys_argz_works" = yes],
+ [AC_DEFINE([HAVE_WORKING_ARGZ], [1],
+ [This value is set to 1 to indicate that the system argz facility works])],
+ [ARGZ_H=argz.h])])
+
AC_SUBST([ARGZ_H])
+AM_CONDITIONAL([GL_GENERATE_ARGZ_H], [test -n "$ARGZ_H"])
])
# Prerequisites of lib/argz.c.