| commit | f73ca60933f0145696081b7727f172a8f21e148e | |
| author | Linus Torvalds <torvalds@g5.osdl.org> | |
| Fri, 9 Sep 2005 18:13:56 +0000 (9 11:13 -0700) | ||
| committer | Linus Torvalds <torvalds@g5.osdl.org> | |
| Fri, 9 Sep 2005 18:13:56 +0000 (9 11:13 -0700) | ||
| tree | 9397a6a3a850816017abe726ab1cace40b7399af | treesnapshot (tar.gz zip) |
| parent | 7a312ea52f7bac609b385b047095d08fd0f5d803 | commitdiff |
Warn about undefined preprocessor symbols at expansion time, not parse time
This means that we can do
#if defined(TOKEN) && TOKEN > 1
and we will _not_ warn even with -Wundef, since the "TOKEN > 1" test
will never even be expanded if TOKEN isn't defined.
Al Viro gets credit for the algorithm changes, I just did the actual coding.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This means that we can do
#if defined(TOKEN) && TOKEN > 1
and we will _not_ warn even with -Wundef, since the "TOKEN > 1" test
will never even be expanded if TOKEN isn't defined.
Al Viro gets credit for the algorithm changes, I just did the actual coding.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| expand.c | diffblobblamehistory | |
| expression.c | diffblobblamehistory | |
| pre-process.c | diffblobblamehistory | |
| symbol.c | diffblobblamehistory | |
| symbol.h | diffblobblamehistory | |
| token.h | diffblobblamehistory |