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| author | Ian Lance Taylor <iant@google.com> | 2009-06-22 16:49:03 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2009-06-22 16:49:03 +0000 |
| commit | 7a5d2eb861a39a2422fb25e4e106941a5aba79d8 (patch) | |
| tree | b04b7d452e4afa1ea57eb1317a2bd224cb2ab8f4 /gcc/c-decl.c | |
| parent | 86e3c83a1cc35d293f60ebd6128993b754a9e7ad (diff) | |
| download | gcc-7a5d2eb861a39a2422fb25e4e106941a5aba79d8.zip gcc-7a5d2eb861a39a2422fb25e4e106941a5aba79d8.tar.gz gcc-7a5d2eb861a39a2422fb25e4e106941a5aba79d8.tar.bz2 | |
linux.opt: Put mglibc ahead of muclibc.
./: * config/linux.opt: Put mglibc ahead of muclibc.
* c-decl.c (diagnose_mismatched_decls): Add -Wc++-compat warning
for duplicate decls.
testsuite/:
* gcc.dg/Wcxx-compat-19.c: New testcase.
From-SVN: r148808
Diffstat (limited to 'gcc/c-decl.c')
| -rw-r--r-- | gcc/c-decl.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gcc/c-decl.c b/gcc/c-decl.c index 8234e01..5eab454 100644 --- a/gcc/c-decl.c +++ b/gcc/c-decl.c @@ -1991,6 +1991,18 @@ diagnose_mismatched_decls (tree newdecl, tree olddecl, return false; } + + /* C++ does not permit a decl to appear multiple times at file + scope. */ + if (warn_cxx_compat + && DECL_FILE_SCOPE_P (newdecl) + && !DECL_EXTERNAL (newdecl) + && !DECL_EXTERNAL (olddecl)) + warned |= warning_at (DECL_SOURCE_LOCATION (newdecl), + OPT_Wc___compat, + ("duplicate declaration of %qD is " + "invalid in C++"), + newdecl); } /* warnings */ |