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Annotation of embedaddon/libiconv/srcm4/strerror.m4, revision 1.1

1.1     ! misho       1: # strerror.m4 serial 9
        !             2: dnl Copyright (C) 2002, 2007-2008 Free Software Foundation, Inc.
        !             3: dnl This file is free software; the Free Software Foundation
        !             4: dnl gives unlimited permission to copy and/or distribute it,
        !             5: dnl with or without modifications, as long as this notice is preserved.
        !             6: 
        !             7: AC_DEFUN([gl_FUNC_STRERROR],
        !             8: [
        !             9:   AC_REQUIRE([gl_FUNC_STRERROR_SEPARATE])
        !            10:   if test $REPLACE_STRERROR = 1; then
        !            11:     AC_LIBOBJ([strerror])
        !            12:     AC_DEFINE_UNQUOTED([REPLACE_STRERROR], [$REPLACE_STRERROR],
        !            13:       [Define this to 1 if strerror is broken.])
        !            14:   fi
        !            15: ])
        !            16: 
        !            17: # Like gl_FUNC_STRERROR, except prepare for separate compilation (no AC_LIBOBJ).
        !            18: AC_DEFUN([gl_FUNC_STRERROR_SEPARATE],
        !            19: [
        !            20:   AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
        !            21:   AC_REQUIRE([gl_HEADER_ERRNO_H])
        !            22:   if test -z "$ERRNO_H"; then
        !            23:     AC_CACHE_CHECK([for working strerror function],
        !            24:      [gl_cv_func_working_strerror],
        !            25:      [AC_RUN_IFELSE(
        !            26:         [AC_LANG_PROGRAM(
        !            27:            [[#include <string.h>
        !            28:            ]],
        !            29:            [[return !*strerror (-2);]])],
        !            30:         [gl_cv_func_working_strerror=yes],
        !            31:         [gl_cv_func_working_strerror=no],
        !            32:         [dnl Assume crossbuild works if it compiles.
        !            33:          AC_COMPILE_IFELSE(
        !            34:            [AC_LANG_PROGRAM(
        !            35:               [[#include <string.h>
        !            36:               ]],
        !            37:               [[return !*strerror (-2);]])],
        !            38:            [gl_cv_func_working_strerror=yes],
        !            39:            [gl_cv_func_working_strerror=no])
        !            40:       ])
        !            41:     ])
        !            42:     if test $gl_cv_func_working_strerror = no; then
        !            43:       dnl The system's strerror() fails to return a string for out-of-range
        !            44:       dnl integers. Replace it.
        !            45:       REPLACE_STRERROR=1
        !            46:     fi
        !            47:   else
        !            48:     dnl The system's strerror() cannot know about the new errno values we add
        !            49:     dnl to <errno.h>. Replace it.
        !            50:     REPLACE_STRERROR=1
        !            51:   fi
        !            52:   if test $REPLACE_STRERROR = 1; then
        !            53:     gl_PREREQ_STRERROR
        !            54:   fi
        !            55: ])
        !            56: 
        !            57: # Prerequisites of lib/strerror.c.
        !            58: AC_DEFUN([gl_PREREQ_STRERROR], [
        !            59:   AC_CHECK_DECLS([strerror])
        !            60:   AC_CHECK_HEADERS_ONCE([sys/socket.h])
        !            61:   if test $ac_cv_header_sys_socket_h != yes; then
        !            62:     dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
        !            63:     dnl the check for those headers unconditional; yet cygwin reports
        !            64:     dnl that the headers are present but cannot be compiled (since on
        !            65:     dnl cygwin, all socket information should come from sys/socket.h).
        !            66:     AC_CHECK_HEADERS([winsock2.h])
        !            67:   fi
        !            68: ])