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| author | Manuel López-Ibáñez <manu@gcc.gnu.org> | 2007-01-30 22:29:11 +0000 |
|---|---|---|
| committer | Manuel López-Ibáñez <manu@gcc.gnu.org> | 2007-01-30 22:29:11 +0000 |
| commit | b9edb4b11c99720e10625b41d37dc440bd468f2c (patch) | |
| tree | 6ab5f599b4f4444b77112bd54a7ebdc103ca2f51 /gcc/doc | |
| parent | 14734fc701357c82967954578c822f3ddede043f (diff) | |
| download | gcc-b9edb4b11c99720e10625b41d37dc440bd468f2c.zip gcc-b9edb4b11c99720e10625b41d37dc440bd468f2c.tar.gz gcc-b9edb4b11c99720e10625b41d37dc440bd468f2c.tar.bz2 | |
re PR c++/24745 (unpleasant warning for "if (NULL)")
2007-01-30 Manuel Lopez-Ibanez <manu@gcc.gnu.org>
PR c++/24745
* doc/invoke.texi (Wpointer-arith): Document warning.
cp/
* typeck.c (build_binary_op): Fix logic for warning. Move warning
to -Wpointer-arith.
* call.c (convert_like_real): Don't warn when converting to
boolean type.
testsuite/
* g++.dg/warn/null4.C: New.
From-SVN: r121361
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index bd4bca6..31490b8 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -3153,7 +3153,8 @@ such assumptions. Warn about anything that depends on the ``size of'' a function type or of @code{void}. GNU C assigns these types a size of 1, for convenience in calculations with @code{void *} pointers and pointers -to functions. +to functions. In C++, warn also when an arithmetic operation involves +@code{NULL}. This warning is also enabled by @option{-pedantic}. @item -Wbad-function-cast @r{(C only)} @opindex Wbad-function-cast |