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Annotation of embedaddon/libiconv/srcm4/strerror.m4, revision 1.1.1.1

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: ])