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Last change
on this file was 2595, checked in by bird, 12 years ago |
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gnu grep version 2.12 (grep-2.12.tar.xz, md5sum=8d2f0346d08b13c18afb81f0e8aa1e2f)
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| 1 | # fdopen.m4 serial 2
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| 2 | dnl Copyright (C) 2011-2012 Free Software Foundation, Inc.
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| 3 | dnl This file is free software; the Free Software Foundation
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| 4 | dnl gives unlimited permission to copy and/or distribute it,
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| 5 | dnl with or without modifications, as long as this notice is preserved.
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| 6 |
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| 7 | AC_DEFUN([gl_FUNC_FDOPEN],
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| 8 | [
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| 9 | AC_REQUIRE([gl_STDIO_H_DEFAULTS])
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| 10 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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| 11 | AC_REQUIRE([gl_MSVC_INVAL])
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| 12 | if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
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| 13 | REPLACE_FDOPEN=1
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| 14 | else
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| 15 | dnl Test whether fdopen() sets errno when it fails due to a bad fd argument.
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| 16 | AC_CACHE_CHECK([whether fdopen sets errno], [gl_cv_func_fdopen_works],
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| 17 | [
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| 18 | AC_RUN_IFELSE(
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| 19 | [AC_LANG_SOURCE([[
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| 20 | #include <stdio.h>
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| 21 | #include <errno.h>
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| 22 | int
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| 23 | main (void)
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| 24 | {
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| 25 | FILE *fp;
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| 26 | errno = 0;
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| 27 | fp = fdopen (-1, "r");
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| 28 | if (fp != NULL)
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| 29 | return 1;
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| 30 | if (errno == 0)
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| 31 | return 2;
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| 32 | return 0;
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| 33 | }]])],
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| 34 | [gl_cv_func_fdopen_works=yes],
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| 35 | [gl_cv_func_fdopen_works=no],
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| 36 | [case "$host_os" in
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| 37 | mingw*) gl_cv_func_fdopen_works="guessing no" ;;
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| 38 | *) gl_cv_func_fdopen_works="guessing yes" ;;
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| 39 | esac
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| 40 | ])
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| 41 | ])
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| 42 | case "$gl_cv_func_fdopen_works" in
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| 43 | *no) REPLACE_FDOPEN=1 ;;
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| 44 | esac
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| 45 | fi
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| 46 | ])
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| 47 |
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| 48 | dnl Prerequisites of lib/fdopen.c.
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| 49 | AC_DEFUN([gl_PREREQ_FDOPEN], [])
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