On 22 July 2013 14:23, Vincent Lefevre wrote: > With GCC 4.8.1, I get annoying warnings like: > > In file included from mpfr-impl.h:461:0, > from mulders.c:33: > mulders.c: In function 'mpfr_mulhigh_n': > mpfr-sassert.h:50:18: warning: typedef 'MPFR_ASSERT_82' locally defined but not used [-Wunused-local-typedefs] > MPFR_ASSERT_CAT(MPFR_ASSERT_,__LINE__)[!!(c) ? 1 : -1]; } while (0) > ^ > mpfr-sassert.h:47:33: note: in definition of macro 'MPFR_ASSERT_CAT_' > # define MPFR_ASSERT_CAT_(a,b) a ## b > ^ > mpfr-sassert.h:50:2: note: in expansion of macro 'MPFR_ASSERT_CAT' > MPFR_ASSERT_CAT(MPFR_ASSERT_,__LINE__)[!!(c) ? 1 : -1]; } while (0) > ^ > mulders.c:82:3: note: in expansion of macro 'MPFR_STAT_STATIC_ASSERT' > MPFR_STAT_STATIC_ASSERT (MPFR_MULHIGH_TAB_SIZE >= 8); /* so that 3*(n/4) > n/2 */ > ^ > > How can I get rid of them in a portable way for GCC? You can mark them with __attribute__((unused)), so you could define a macro that expands to nothing for other compilers.
