Mercurial > hg > octave-lojdl > gnulib-hg
changeset 15322:c0796192673c
dup2: remove test for existence of fcntl
* m4/dup2.m4 (gl_FUNC_DUP2): Use "#ifdef FD_CLOEXEC", not
"#if HAVE_FCNTL", in the configure-time test program.
This removes the need for the AC_CHECK_FUNCS_ONCE([fcntl]),
and therefore speeds up "configure" a bit. Found while
adding the dup2 module to Emacs.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Sat, 25 Jun 2011 01:56:52 -0700 |
parents | eada9764cc6a |
children | b4b10d174a9d |
files | ChangeLog m4/dup2.m4 |
diffstat | 2 files changed, 13 insertions(+), 5 deletions(-) [+] |
line wrap: on
line diff
--- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,12 @@ +2011-06-25 Paul Eggert <eggert@cs.ucla.edu> + + dup2: remove test for existence of fcntl + * m4/dup2.m4 (gl_FUNC_DUP2): Use "#ifdef FD_CLOEXEC", not + "#if HAVE_FCNTL", in the configure-time test program. + This removes the need for the AC_CHECK_FUNCS_ONCE([fcntl]), + and therefore speeds up "configure" a bit. Found while + adding the dup2 module to Emacs. + 2011-06-24 Eric Blake <eblake@redhat.com> maint.mk: enhance useless header checks
--- a/m4/dup2.m4 +++ b/m4/dup2.m4 @@ -1,4 +1,4 @@ -#serial 12 +#serial 13 dnl Copyright (C) 2002, 2005, 2007, 2009-2011 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -17,7 +17,6 @@ ], [ AC_DEFINE([HAVE_DUP2], [1], [Define to 1 if you have the 'dup2' function.]) ]) - AC_CHECK_FUNCS_ONCE([fcntl]) if test $HAVE_DUP2 = 1; then AC_CACHE_CHECK([whether dup2 works], [gl_cv_func_dup2_works], [AC_RUN_IFELSE([ @@ -25,13 +24,13 @@ #include <fcntl.h> #include <errno.h>]], [int result = 0; -#if HAVE_FCNTL +#ifdef FD_CLOEXEC if (fcntl (1, F_SETFD, FD_CLOEXEC) == -1) result |= 1; -#endif HAVE_FCNTL +#endif if (dup2 (1, 1) == 0) result |= 2; -#if HAVE_FCNTL +#ifdef FD_CLOEXEC if (fcntl (1, F_GETFD) != FD_CLOEXEC) result |= 4; #endif