diff options
Diffstat (limited to 'gettext-tools/gnulib-m4/dup.m4')
| -rw-r--r-- | gettext-tools/gnulib-m4/dup.m4 | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/gettext-tools/gnulib-m4/dup.m4 b/gettext-tools/gnulib-m4/dup.m4 index b67e5b7..e30348c 100644 --- a/gettext-tools/gnulib-m4/dup.m4 +++ b/gettext-tools/gnulib-m4/dup.m4 @@ -1,5 +1,5 @@ -# dup.m4 serial 3 -dnl Copyright (C) 2011-2015 Free Software Foundation, Inc. +# dup.m4 serial 4 +dnl Copyright (C) 2011-2016 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. @@ -19,6 +19,26 @@ AC_DEFUN([gl_FUNC_DUP], REPLACE_DUP=1 fi ]) + AC_CACHE_CHECK([whether dup works], [gl_cv_func_dup_works], + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM([[#include <unistd.h> + #include <fcntl.h> + #include <errno.h>]], + [[/* On OS/2 kLIBC, dup does not work on a directory fd. */ + int fd = open (".", O_RDONLY); + return fd < 0 ? 1 : dup (fd) < 0 ? 2 : 0; + ]]) + ], + [gl_cv_func_dup_works=yes], + [gl_cv_func_dup_works=no], + [gl_cv_func_dup_works='guessing yes']) + ]) + case "$gl_cv_func_dup_works" in + *yes) ;; + *) + REPLACE_DUP=1 + ;; + esac ]) # Prerequisites of lib/dup.c. |