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ltargz.m4
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# Portability macros for glibc argz. -*- Autoconf -*- # # Copyright (C) 2004-2007, 2011-2015 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 1 ltargz.m4 AC_DEFUN([LT_FUNC_ARGZ], [ 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.]) 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]) LT_ARGZ_H= AC_CHECK_FUNCS([argz_add argz_append argz_count argz_create_sep argz_insert \ argz_next argz_stringify], [], [LT_ARGZ_H=lt__argz.h; AC_LIBOBJ([lt__argz])]) 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 16-Mar-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 "$LT_ARGZ_H"], [AC_CACHE_CHECK( [if argz actually works], [lt_cv_sys_argz_works], [[case $host_os in #( *cygwin*) lt_cv_sys_argz_works=no if test no != "$cross_compiling"; 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 1 -lt "$lt_os_major" \ || { test 1 -eq "$lt_os_major" \ && { test 5 -lt "$lt_os_minor" \ || { test 5 -eq "$lt_os_minor" \ && test 24 -lt "$lt_os_micro"; }; }; }; then lt_cv_sys_argz_works=yes fi fi ;; #( *) lt_cv_sys_argz_works=yes ;; esac]]) AS_IF([test yes = "$lt_cv_sys_argz_works"], [AC_DEFINE([HAVE_WORKING_ARGZ], 1, [This value is set to 1 to indicate that the system argz facility works])], [LT_ARGZ_H=lt__argz.h AC_LIBOBJ([lt__argz])])]) AC_SUBST([LT_ARGZ_H]) ])