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| author | Manuel López-Ibáñez <manu@gcc.gnu.org> | 2010-02-20 21:32:06 +0000 |
|---|---|---|
| committer | Manuel López-Ibáñez <manu@gcc.gnu.org> | 2010-02-20 21:32:06 +0000 |
| commit | 17251338deebd6575ef2a9e2c99c3f976561dc93 (patch) | |
| tree | 80eb6bcb9ce16ee2cd887d93ee782806145b1486 /gcc/doc | |
| parent | c387e0676eb6949dfc49681d6ac1b09c3e11d2ca (diff) | |
| download | gcc-17251338deebd6575ef2a9e2c99c3f976561dc93.zip gcc-17251338deebd6575ef2a9e2c99c3f976561dc93.tar.gz gcc-17251338deebd6575ef2a9e2c99c3f976561dc93.tar.bz2 | |
re PR c++/35669 (NULL (__null) not considered different from 0 with C++)
2010-02-20 Manuel López-Ibáñez <manu@gcc.gnu.org>
PR c++/35669
* c.opt (Wconversion-null): New option.
* doc/invoke.texi (Wconversion-null): Document.
cp/
* call.c (conversion_null_warnings): Replace -Wconversion with
-Wconversion-null.
* cvt.c (build_expr_type_conversion): Likewise.
testsuite/
* g++.dg/warn/Wconversion2.C: Replace -Wconversion with
-Wconversion-null.
* g++.dg/warn/Wconversion-null.C: New test.
* g++.old-deja/g++.other/null1.C: Move to...
* g++.dg/warn/Wconversion-null-2.C: ... here. Remove -Wconversion.
libstdc++-v3/
* testsuite/18_support/headers/cstddef/macros.cc: Add
-Wno-conversion-null.
From-SVN: r156928
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index a81cc99..a7abd01 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -194,7 +194,7 @@ in the following sections. -fno-threadsafe-statics -fuse-cxa-atexit -fno-weak -nostdinc++ @gol -fno-default-inline -fvisibility-inlines-hidden @gol -fvisibility-ms-compat @gol --Wabi -Wctor-dtor-privacy @gol +-Wabi -Wconversion-null -Wctor-dtor-privacy @gol -Wnon-virtual-dtor -Wreorder @gol -Weffc++ -Wstrict-null-sentinel @gol -Wno-non-template-friend -Wold-style-cast @gol @@ -3837,14 +3837,19 @@ changed by the conversion like in @code{abs (2.0)}. Warnings about conversions between signed and unsigned integers can be disabled by using @option{-Wno-sign-conversion}. -For C++, also warn for conversions between @code{NULL} and non-pointer -types; confusing overload resolution for user-defined conversions; and -conversions that will never use a type conversion operator: -conversions to @code{void}, the same type, a base class or a reference -to them. Warnings about conversions between signed and unsigned -integers are disabled by default in C++ unless +For C++, also warn for confusing overload resolution for user-defined +conversions; and conversions that will never use a type conversion +operator: conversions to @code{void}, the same type, a base class or a +reference to them. Warnings about conversions between signed and +unsigned integers are disabled by default in C++ unless @option{-Wsign-conversion} is explicitly enabled. +@item -Wno-conversion-null @r{(C++)} +@opindex Wconversion-null +@opindex Wno-conversion-null +Do not warn for conversions between @code{NULL} and non-pointer +types. @option{-Wconversion-null} is enabled by default. + @item -Wempty-body @opindex Wempty-body @opindex Wno-empty-body |