diff options
author | Ludovic Courtès <ludo@gnu.org> | 2009-11-15 20:16:40 +0100 |
---|---|---|
committer | Ludovic Courtès <ludo@gnu.org> | 2009-11-16 09:23:46 +0100 |
commit | 8912421cf3829a4fd65877fd1255125c191f6f89 (patch) | |
tree | 6b89fecf0738a1f80792bbe7453730f7882f1d54 /lib/ignore-value.h | |
parent | 3fe87cf7aff396d7bd993aa009f48eb8afd6c1cd (diff) | |
download | guile-8912421cf3829a4fd65877fd1255125c191f6f89.tar.gz |
Use Gnulib's `inet_ntop' and `inet_pton' modules.
* m4/gnulib-cache.m4: Add `inet_ntop' and `inet_pton'.
* configure.ac: Don't check for `inet_ntop' and `inet_pton'.
* libguile/socket.c (scm_inet_pton, scm_inet_ntop): Compile regardless
of `HAVE_INET_PTON' and `HAVE_INET_NTOP' respectively.
* libguile/filesys.c: Use <stdlib.h> instead of <canonicalize.h>.
Diffstat (limited to 'lib/ignore-value.h')
-rw-r--r-- | lib/ignore-value.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/lib/ignore-value.h b/lib/ignore-value.h new file mode 100644 index 000000000..86cfad77b --- /dev/null +++ b/lib/ignore-value.h @@ -0,0 +1,37 @@ +/* ignore a function return without a compiler warning + + Copyright (C) 2008-2009 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +/* Written by Jim Meyering. */ + +/* Use these functions to avoid a warning when using a function declared with + gcc's warn_unused_result attribute, but for which you really do want to + ignore the result. Traditionally, people have used a "(void)" cast to + indicate that a function's return value is deliberately unused. However, + if the function is declared with __attribute__((warn_unused_result)), + gcc issues a warning even with the cast. + + Caution: most of the time, you really should heed gcc's warning, and + check the return value. However, in those exceptional cases in which + you're sure you know what you're doing, use this function. + + For the record, here's one of the ignorable warnings: + "copy.c:233: warning: ignoring return value of 'fchown', + declared with attribute warn_unused_result". */ + +static inline void ignore_value (int i) { (void) i; } +static inline void ignore_ptr (void* p) { (void) p; } +/* FIXME: what about aggregate types? */ |