[
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
AC_REQUIRE([AC_CANONICAL_HOST])
- AC_CHECK_FUNCS_ONCE([dup2 fcntl])
- if test $ac_cv_func_dup2 = no; then
- HAVE_DUP2=0
- AC_LIBOBJ([dup2])
- else
+ m4_ifdef([gl_FUNC_DUP2_OBSOLETE], [
+ AC_CHECK_FUNCS_ONCE([dup2])
+ if test $ac_cv_func_dup2 = no; then
+ HAVE_DUP2=0
+ AC_LIBOBJ([dup2])
+ fi
+ ], [
+ 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([
AC_LANG_PROGRAM([[#include <unistd.h>
AC_DEFUN([gl_REPLACE_DUP2],
[
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+ AC_CHECK_FUNCS_ONCE([dup2])
if test $ac_cv_func_dup2 = yes; then
REPLACE_DUP2=1
fi