On 2015.07.31 at 04:20 -0400, Jeffrey Walton wrote: > We are catching a -Wmaybe-unitialized warning. We used Valgrind to > determine its OK to suppress the warning. (No complaints about the > warning itself; we'd rather know and be "better safe than sorry"). > > I'm having trouble determining when -Wmaybe-unitialized became > available. The following is producing a warning hydra: > > // vmac.cpp:404:93: warning: ‘al2’ may be used uninitialized in this function > // ... vmac.cpp:479:26: note: ‘al2’ was declared here > // Valgrind cleared this finding. > #if GCC_DIAGNOSTIC_AWARE > # pragma GCC diagnostic push > # pragma GCC diagnostic ignored "-Wmaybe-uninitialized" > #endif > > and: > > c++ -DNDEBUG -g2 -O3 -fPIC -march=native -Wall -Wextra -pipe -c vmac.cpp > vmac.cpp:457:33: warning: unknown warning group '-Wmaybe-uninitialized', ignored > [-Wunknown-pragmas] > # pragma GCC diagnostic ignored "-Wmaybe-uninitialized" > ^ > > I checked the GCC release notes for 5, 4.9, 4.8. 4.7, 4.6, 4.5 and > 4.4, but I did not see it discussed or mentioned. > > When did -Wmaybe-unitialized make its appearance? The svn or git repositories are publicly available. They should give you the answer. -- Markus
