diff options
Diffstat (limited to 'm4/dup2.m4')
| -rw-r--r-- | m4/dup2.m4 | 32 |
1 files changed, 20 insertions, 12 deletions
@@ -1,5 +1,5 @@ -#serial 14 -dnl Copyright (C) 2002, 2005, 2007, 2009-2011 Free Software Foundation, Inc. +#serial 18 +dnl Copyright (C) 2002, 2005, 2007, 2009-2012 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -45,29 +45,37 @@ AC_DEFUN([gl_FUNC_DUP2], [gl_cv_func_dup2_works=yes], [gl_cv_func_dup2_works=no], [case "$host_os" in mingw*) # on this platform, dup2 always returns 0 for success - gl_cv_func_dup2_works=no;; + gl_cv_func_dup2_works="guessing no" ;; cygwin*) # on cygwin 1.5.x, dup2(1,1) returns 0 - gl_cv_func_dup2_works=no;; + gl_cv_func_dup2_works="guessing no" ;; linux*) # On linux between 2008-07-27 and 2009-05-11, dup2 of a # closed fd may yield -EBADF instead of -1 / errno=EBADF. - gl_cv_func_dup2_works=no;; + gl_cv_func_dup2_works="guessing no" ;; freebsd*) # on FreeBSD 6.1, dup2(1,1000000) gives EMFILE, not EBADF. - gl_cv_func_dup2_works=no;; + gl_cv_func_dup2_works="guessing no" ;; haiku*) # on Haiku alpha 2, dup2(1, 1) resets FD_CLOEXEC. - gl_cv_func_dup2_works=no;; - *) gl_cv_func_dup2_works=yes;; + gl_cv_func_dup2_works="guessing no" ;; + *) gl_cv_func_dup2_works="guessing yes" ;; esac]) ]) - if test "$gl_cv_func_dup2_works" = no; then - REPLACE_DUP2=1 - fi + case "$gl_cv_func_dup2_works" in + *yes) ;; + *) + REPLACE_DUP2=1 + ;; + esac fi dnl Replace dup2() for supporting the gnulib-defined fchdir() function, dnl to keep fchdir's bookkeeping up-to-date. m4_ifdef([gl_FUNC_FCHDIR], [ gl_TEST_FCHDIR if test $HAVE_FCHDIR = 0; then - REPLACE_DUP2=1 + if test $HAVE_DUP2 = 1; then + REPLACE_DUP2=1 + fi fi ]) ]) + +# Prerequisites of lib/dup2.c. +AC_DEFUN([gl_PREREQ_DUP2], []) |