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| author | Bruno Haible <bruno@clisp.org> | 2011-09-24 17:42:03 +0200 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2011-09-24 17:42:03 +0200 |
| commit | 026b2bdecbd540899299f499f062354dcb0556b0 (patch) | |
| tree | 9f089ab3de696f903674d55fea0a586b6dc3aabe /m4/dup.m4 | |
| parent | eea38e67b2eb57529b01092d86178935d7ead222 (diff) | |
| download | gnulib-026b2bdecbd540899299f499f062354dcb0556b0.tar.gz | |
dup: Simplify autoconf test.
* m4/dup.m4 (gl_FUNC_DUP): Don't run a test program. Instead, just rely
on gl_MSVC_INVAL's result.
Diffstat (limited to 'm4/dup.m4')
| -rw-r--r-- | m4/dup.m4 | 35 |
1 files changed, 5 insertions, 30 deletions
@@ -1,4 +1,4 @@ -# dup.m4 serial 1 +# dup.m4 serial 2 dnl Copyright (C) 2011 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -7,35 +7,10 @@ dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_FUNC_DUP], [ AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) - AC_REQUIRE([AC_CANONICAL_HOST]) - AC_CHECK_HEADERS_ONCE([unistd.h]) - AC_CACHE_CHECK([whether dup supports bad arguments], [gl_cv_func_dup_works], - [AC_RUN_IFELSE( - [AC_LANG_PROGRAM([[ -#if HAVE_UNISTD_H -# include <unistd.h> -#else -# include <io.h> -#endif -#include <errno.h> -]], - [[if (dup (-1) != -1) - return 1; - if (errno != EBADF) - return 2; - return 0; - ]])], - [gl_cv_func_dup_works=yes], - [gl_cv_func_dup_works=no], - [case "$host_os" in - mingw*) gl_cv_func_dup_works="guessing no" ;; - *) gl_cv_func_dup_works="guessing yes" ;; - esac - ]) - ]) - case "$gl_cv_func_dup_works" in - *no) REPLACE_DUP=1 ;; - esac + AC_REQUIRE([gl_MSVC_INVAL]) + if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then + REPLACE_DUP=1 + fi dnl Replace dup() for supporting the gnulib-defined fchdir() function, dnl to keep fchdir's bookkeeping up-to-date. m4_ifdef([gl_FUNC_FCHDIR], [ |