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Annotation of parser3/src/lib/ltdl/m4/ltargz.m4, revision 1.1

1.1     ! moko        1: # Portability macros for glibc argz.                    -*- Autoconf -*-
        !             2: #
        !             3: #   Copyright (C) 2004-2007, 2011-2019, 2021-2024 Free Software
        !             4: #   Foundation, Inc.
        !             5: #   Written by Gary V. Vaughan <gary@gnu.org>
        !             6: #
        !             7: # This file is free software; the Free Software Foundation gives
        !             8: # unlimited permission to copy and/or distribute it, with or without
        !             9: # modifications, as long as this notice is preserved.
        !            10: 
        !            11: # serial 2 ltargz.m4
        !            12: 
        !            13: AC_DEFUN([LT_FUNC_ARGZ], [
        !            14: dnl Required for use of '$SED' in Cygwin configuration.
        !            15: AC_REQUIRE([AC_PROG_SED])dnl
        !            16: AC_CHECK_HEADERS([argz.h], [], [], [AC_INCLUDES_DEFAULT])
        !            17: 
        !            18: AC_CHECK_TYPES([error_t],
        !            19:   [],
        !            20:   [AC_DEFINE([error_t], [int],
        !            21:    [Define to a type to use for 'error_t' if it is not otherwise available.])
        !            22:    AC_DEFINE([__error_t_defined], [1], [Define so that glibc/gnulib argp.h
        !            23:     does not typedef error_t.])],
        !            24:   [#if defined(HAVE_ARGZ_H)
        !            25: #  include <argz.h>
        !            26: #endif])
        !            27: 
        !            28: LT_ARGZ_H=
        !            29: AC_CHECK_FUNCS([argz_add argz_append argz_count argz_create_sep argz_insert \
        !            30:        argz_next argz_stringify], [], [LT_ARGZ_H=lt__argz.h; AC_LIBOBJ([lt__argz])])
        !            31: 
        !            32: dnl if have system argz functions, allow forced use of
        !            33: dnl libltdl-supplied implementation (and default to do so
        !            34: dnl on "known bad" systems). Could use a runtime check, but
        !            35: dnl (a) detecting malloc issues is notoriously unreliable
        !            36: dnl (b) only known system that declares argz functions,
        !            37: dnl     provides them, yet they are broken, is cygwin
        !            38: dnl     releases prior to 16-Mar-2007 (1.5.24 and earlier)
        !            39: dnl So, it's more straightforward simply to special case
        !            40: dnl this for known bad systems.
        !            41: AS_IF([test -z "$LT_ARGZ_H"],
        !            42:     [AC_CACHE_CHECK(
        !            43:         [if argz actually works],
        !            44:         [lt_cv_sys_argz_works],
        !            45:         [[case $host_os in #(
        !            46:         *cygwin*)
        !            47:           lt_cv_sys_argz_works=no
        !            48:           if test no != "$cross_compiling"; then
        !            49:             lt_cv_sys_argz_works="guessing no"
        !            50:           else
        !            51:             lt_sed_extract_leading_digits='s/^\([0-9\.]*\).*/\1/'
        !            52:             save_IFS=$IFS
        !            53:             IFS=-.
        !            54:             set x `uname -r | $SED -e "$lt_sed_extract_leading_digits"`
        !            55:             IFS=$save_IFS
        !            56:             lt_os_major=${2-0}
        !            57:             lt_os_minor=${3-0}
        !            58:             lt_os_micro=${4-0}
        !            59:             if test 1 -lt "$lt_os_major" \
        !            60:                || { test 1 -eq "$lt_os_major" \
        !            61:                  && { test 5 -lt "$lt_os_minor" \
        !            62:                    || { test 5 -eq "$lt_os_minor" \
        !            63:                      && test 24 -lt "$lt_os_micro"; }; }; }; then
        !            64:               lt_cv_sys_argz_works=yes
        !            65:             fi
        !            66:           fi
        !            67:           ;; #(
        !            68:         *) lt_cv_sys_argz_works=yes ;;
        !            69:         esac]])
        !            70:      AS_IF([test yes = "$lt_cv_sys_argz_works"],
        !            71:         [AC_DEFINE([HAVE_WORKING_ARGZ], 1,
        !            72:                    [This value is set to 1 to indicate that the system argz facility works])],
        !            73:         [LT_ARGZ_H=lt__argz.h
        !            74:         AC_LIBOBJ([lt__argz])])])
        !            75: 
        !            76: AC_SUBST([LT_ARGZ_H])
        !            77: ])