On 2012-05-15 12:29:35 +0200, Manuel López-Ibáñez wrote: > On 15 May 2012 12:22, Vincent Lefevre <vincent+gcc@xxxxxxxxxx> wrote: > > #pragma GCC diagnostic ignored "-Wpragmas" > > #pragma GCC diagnostic ignored "-Wuninitialized" > > #pragma GCC diagnostic ignored "-Wmaybe-uninitialized" > > #pragma GCC diagnostic ignored "-Wfoo" > > #pragma GCC diagnostic warning "-Wpragmas" > > #pragma GCC diagnostic ignored "-Wbar" > > > > will just give a warning concerning -Wbar. > > And I think that in the same way we ignore -Wno-foo if no warnings are > given, we should ignore: > > > #pragma GCC diagnostic ignored "-Wfoo" I suppose that this is intentional, as http://gcc.gnu.org/gcc-4.4/changes.html says: Unknown -Wno-* options are now silently ignored by GCC if no other diagnostics are issued. If other diagnostics are issued, then GCC warns about the unknown options. > Note that you can test for the exact version of GCC with #ifdef > GCC_MAJOR >= 4 && GCC_MINOR >= 7. They don't exist. $ gcc-4.7 -dM -E -xc /dev/null | grep GCC #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1 #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 1 #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 1 #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 1 #define __GCC_ATOMIC_CHAR_LOCK_FREE 2 #define __GCC_ATOMIC_CHAR32_T_LOCK_FREE 2 #define __GCC_ATOMIC_BOOL_LOCK_FREE 2 #define __GCC_ATOMIC_POINTER_LOCK_FREE 2 #define __GCC_HAVE_DWARF2_CFI_ASM 1 #define __GCC_ATOMIC_INT_LOCK_FREE 2 #define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 2 #define __GCC_ATOMIC_LONG_LOCK_FREE 2 #define __GCC_ATOMIC_TEST_AND_SET_TRUEVAL 1 #define __GCC_ATOMIC_CHAR16_T_LOCK_FREE 2 #define __GCC_ATOMIC_LLONG_LOCK_FREE 2 #define __GCC_ATOMIC_SHORT_LOCK_FREE 2 GMP and MPFR have such macros. It would be a nice addition to GCC, but with the __GCC prefix. -- Vincent Lefèvre <vincent@xxxxxxxxxx> - Web: <http://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <http://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
