80 lines
2.6 KiB
Text
80 lines
2.6 KiB
Text
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# Portability macros for glibc argz. -*- Autoconf -*-
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#
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# Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
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# Written by Gary V. Vaughan <gary@gnu.org>
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#
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# This file is free software; the Free Software Foundation gives
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# unlimited permission to copy and/or distribute it, with or without
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# modifications, as long as this notice is preserved.
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# serial 5 argz.m4
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AC_DEFUN([gl_FUNC_ARGZ],
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[gl_PREREQ_ARGZ
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AC_CHECK_HEADERS([argz.h], [], [], [AC_INCLUDES_DEFAULT])
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AC_CHECK_TYPES([error_t],
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[],
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[AC_DEFINE([error_t], [int],
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[Define to a type to use for `error_t' if it is not otherwise available.])
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AC_DEFINE([__error_t_defined], [1], [Define so that glibc/gnulib argp.h
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does not typedef error_t.])],
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[#if defined(HAVE_ARGZ_H)
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# include <argz.h>
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#endif])
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ARGZ_H=
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AC_CHECK_FUNCS([argz_add argz_append argz_count argz_create_sep argz_insert \
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argz_next argz_stringify], [], [ARGZ_H=argz.h; AC_LIBOBJ([argz])])
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dnl if have system argz functions, allow forced use of
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dnl libltdl-supplied implementation (and default to do so
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dnl on "known bad" systems). Could use a runtime check, but
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dnl (a) detecting malloc issues is notoriously unreliable
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dnl (b) only known system that declares argz functions,
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dnl provides them, yet they are broken, is cygwin
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dnl releases prior to 16-Mar-2007 (1.5.24 and earlier)
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dnl So, it's more straightforward simply to special case
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dnl this for known bad systems.
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AS_IF([test -z "$ARGZ_H"],
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[AC_CACHE_CHECK(
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[if argz actually works],
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[lt_cv_sys_argz_works],
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[[case $host_os in #(
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*cygwin*)
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lt_cv_sys_argz_works=no
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if test "$cross_compiling" != no; then
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lt_cv_sys_argz_works="guessing no"
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else
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lt_sed_extract_leading_digits='s/^\([0-9\.]*\).*/\1/'
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save_IFS=$IFS
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IFS=-.
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set x `uname -r | sed -e "$lt_sed_extract_leading_digits"`
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IFS=$save_IFS
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lt_os_major=${2-0}
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lt_os_minor=${3-0}
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lt_os_micro=${4-0}
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if test "$lt_os_major" -gt 1 \
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|| { test "$lt_os_major" -eq 1 \
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&& { test "$lt_os_minor" -gt 5 \
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|| { test "$lt_os_minor" -eq 5 \
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&& test "$lt_os_micro" -gt 24; }; }; }; then
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lt_cv_sys_argz_works=yes
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fi
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fi
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;; #(
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*) lt_cv_sys_argz_works=yes ;;
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esac]])
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AS_IF([test "$lt_cv_sys_argz_works" = yes],
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[AC_DEFINE([HAVE_WORKING_ARGZ], 1,
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[This value is set to 1 to indicate that the system argz facility works])],
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[ARGZ_H=argz.h
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AC_LIBOBJ([argz])])])
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AC_SUBST([ARGZ_H])
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])
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# Prerequisites of lib/argz.c.
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AC_DEFUN([gl_PREREQ_ARGZ], [:])
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