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| author | Roger Sayle <roger@eyesopen.com> | 2005-12-04 19:56:47 +0000 |
|---|---|---|
| committer | Roger Sayle <sayle@gcc.gnu.org> | 2005-12-04 19:56:47 +0000 |
| commit | e994a705a9d8447c17486c13d741c2692c475f67 (patch) | |
| tree | 0c868f77e7b841472e04bdb16256459255a05c04 /gcc/common.opt | |
| parent | 93af36c5c18bae3a294d98e46300ea3a867ecf56 (diff) | |
| download | gcc-e994a705a9d8447c17486c13d741c2692c475f67.zip gcc-e994a705a9d8447c17486c13d741c2692c475f67.tar.gz gcc-e994a705a9d8447c17486c13d741c2692c475f67.tar.bz2 | |
re PR c/7776 (const char* p = "foo"; if (p == "foo") ... is compiled without warning!)
PR c/7776
* common.opt (Wstring-literal-comparison): New command line option.
* c-opts.c (c_common_handle_option): Set it with -Wall.
* c-typeck.c (parser_build_binary_op): Issue warning if either
operand of a comparison operator is a string literal, except for
testing equality or inequality against NULL.
* doc/invoke.texi: Document new -Wstring-literal-comparison option.
* gcc.dg/Wstring-literal-comparison-1.c: New test case.
* gcc.dg/Wstring-literal-comparison-2.c: Likewise.
* gcc.dg/Wstring-literal-comparison-3.c: Likewise.
* gcc.dg/Wstring-literal-comparison-4.c: Likewise.
From-SVN: r108018
Diffstat (limited to 'gcc/common.opt')
| -rw-r--r-- | gcc/common.opt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/common.opt b/gcc/common.opt index 6ac77fd..e49838a 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -125,6 +125,10 @@ Wstrict-aliasing= Common Joined UInteger Warn about code which might break strict aliasing rules +Wstring-literal-comparison +Common Var(warn_string_literal_comparison) +Warn about comparisons to constant string literals + Wswitch Common Var(warn_switch) Warn about enumerated switches, with no default, missing a case |