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| author | Dodji Seketeli <dodji@redhat.com> | 2012-04-30 11:43:57 +0000 |
|---|---|---|
| committer | Dodji Seketeli <dodji@gcc.gnu.org> | 2012-04-30 13:43:57 +0200 |
| commit | b9c8da345cd0763bb30a5a12713c808d74a2070f (patch) | |
| tree | e79bab429f035c8a49182501433c80c03c767993 /gcc/doc | |
| parent | 51fce2d3968d485cc72fb22740e82d0c31ce9ae9 (diff) | |
| download | gcc-b9c8da345cd0763bb30a5a12713c808d74a2070f.zip gcc-b9c8da345cd0763bb30a5a12713c808d74a2070f.tar.gz gcc-b9c8da345cd0763bb30a5a12713c808d74a2070f.tar.bz2 | |
Add -Wvarargs option
Several warnings related to questionable usage cases of variadic
function related macros (like va_start) could not be controlled by any
warning-related macro. Fixed thus, by introducing the -Wvarargs
option.
Tested on x86_64-unknown-linux-gnu against trunk.
gcc/c-family/
* c.opt (Wvarargs): Define new option.
gcc/
* builtins.c (fold_builtin_next_arg): Use OPT_Wvarargs as an
argument for the various warning_at calls.
gcc/doc/
* invoke.texi: Update the documentation.
gcc/testsuite/
* c-c++-common/Wvarargs.c: New test case.
* c-c++-common/Wvarargs-2.c: Likewise.
From-SVN: r186978
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index c6ee28f..a7efaa7 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -4663,6 +4663,13 @@ Warn if variadic macros are used in pedantic ISO C90 mode, or the GNU alternate syntax when in pedantic ISO C99 mode. This is default. To inhibit the warning messages, use @option{-Wno-variadic-macros}. +@item -Wvarargs +@opindex Wvarargs +@opindex Wno-varargs +Warn upon questionable usage of the macros used to handle variable +arguments like @samp{va_start}. This is default. To inhibit the +warning messages, use @option{-Wno-varargs}. + @item -Wvector-operation-performance @opindex Wvector-operation-performance @opindex Wno-vector-operation-performance |