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Annotation of gforth/libltdl/m4/argz.m4, revision 1.1

1.1     ! anton       1: # Portability macros for glibc argz.                    -*- Autoconf -*-
        !             2: #
        !             3: #   Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
        !             4: #   Written by Gary V. Vaughan <gary@gnu.org>
        !             5: #
        !             6: # This file is free software; the Free Software Foundation gives
        !             7: # unlimited permission to copy and/or distribute it, with or without
        !             8: # modifications, as long as this notice is preserved.
        !             9: 
        !            10: # serial 5 argz.m4
        !            11: 
        !            12: AC_DEFUN([gl_FUNC_ARGZ],
        !            13: [gl_PREREQ_ARGZ
        !            14: 
        !            15: AC_CHECK_HEADERS([argz.h], [], [], [AC_INCLUDES_DEFAULT])
        !            16: 
        !            17: AC_CHECK_TYPES([error_t],
        !            18:   [],
        !            19:   [AC_DEFINE([error_t], [int],
        !            20:    [Define to a type to use for `error_t' if it is not otherwise available.])
        !            21:    AC_DEFINE([__error_t_defined], [1], [Define so that glibc/gnulib argp.h
        !            22:     does not typedef error_t.])],
        !            23:   [#if defined(HAVE_ARGZ_H)
        !            24: #  include <argz.h>
        !            25: #endif])
        !            26: 
        !            27: ARGZ_H=
        !            28: AC_CHECK_FUNCS([argz_add argz_append argz_count argz_create_sep argz_insert \
        !            29:        argz_next argz_stringify], [], [ARGZ_H=argz.h; AC_LIBOBJ([argz])])
        !            30: 
        !            31: dnl if have system argz functions, allow forced use of 
        !            32: dnl libltdl-supplied implementation (and default to do so
        !            33: dnl on "known bad" systems). Could use a runtime check, but
        !            34: dnl (a) detecting malloc issues is notoriously unreliable
        !            35: dnl (b) only known system that declares argz functions,
        !            36: dnl     provides them, yet they are broken, is cygwin
        !            37: dnl     releases prior to 16-Mar-2007 (1.5.24 and earlier)
        !            38: dnl So, it's more straightforward simply to special case 
        !            39: dnl this for known bad systems.
        !            40: AS_IF([test -z "$ARGZ_H"],
        !            41:     [AC_CACHE_CHECK(
        !            42:         [if argz actually works],
        !            43:         [lt_cv_sys_argz_works],
        !            44:         [[case $host_os in #(
        !            45:         *cygwin*)
        !            46:           lt_cv_sys_argz_works=no
        !            47:           if test "$cross_compiling" != no; then
        !            48:             lt_cv_sys_argz_works="guessing no"
        !            49:           else
        !            50:             lt_sed_extract_leading_digits='s/^\([0-9\.]*\).*/\1/'
        !            51:             save_IFS=$IFS
        !            52:             IFS=-.
        !            53:             set x `uname -r | sed -e "$lt_sed_extract_leading_digits"`
        !            54:             IFS=$save_IFS
        !            55:             lt_os_major=${2-0}
        !            56:             lt_os_minor=${3-0}
        !            57:             lt_os_micro=${4-0}
        !            58:             if test "$lt_os_major" -gt 1 \
        !            59:                || { test "$lt_os_major" -eq 1 \
        !            60:                  && { test "$lt_os_minor" -gt 5 \
        !            61:                    || { test "$lt_os_minor" -eq 5 \
        !            62:                      && test "$lt_os_micro" -gt 24; }; }; }; then
        !            63:               lt_cv_sys_argz_works=yes
        !            64:             fi
        !            65:           fi
        !            66:           ;; #(
        !            67:         *) lt_cv_sys_argz_works=yes ;;
        !            68:         esac]])
        !            69:      AS_IF([test $lt_cv_sys_argz_works = yes],
        !            70:         [AC_DEFINE([HAVE_WORKING_ARGZ], 1,
        !            71:                    [This value is set to 1 to indicate that the system argz facility works])],
        !            72:         [ARGZ_H=argz.h
        !            73:         AC_LIBOBJ([argz])])])
        !            74: 
        !            75: AC_SUBST([ARGZ_H])
        !            76: ])
        !            77: 
        !            78: # Prerequisites of lib/argz.c.
        !            79: AC_DEFUN([gl_PREREQ_ARGZ], [:])