mirrors/emacs
1
Fork 0
mirror of git://git.sv.gnu.org/emacs.git synced 2025-12-05 22:20:24 -08:00
Code Issues Projects Releases Wiki Activity

Merge from gnulib.

Browse source 
Fixes: debbugs:11527
This commit is contained in:
Paul Eggert 2012-05-26 16:14:36 -07:00
parent fe453991ea
commit caf8a9b2b3
119 changed files with 2836 additions and 1799 deletions
Download patch file Download diff file Expand all files Collapse all files

29
m4/dup2.m4
View file

@ -1,5 +1,5 @@
#serial 16
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 +45,34 @@ 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
])
])