https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65801
Bug ID: 65801 Summary: Allow -Wno-narrowing to silence stricter C++11 narrowing rules Product: gcc Version: 5.0 Status: UNCONFIRMED Severity: enhancement Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: jengelh at inai dot de This code: ---8<--- static struct zai { unsigned int x; } x = {-1}; --->8--- gives this error in C++11 mode: $ g++-5 -std=gnu++11 -c y.cpp y.cpp:1:46: error: narrowing conversion of ‘-1’ from ‘int’ to ‘unsigned int’ inside { } Clang 3.5 offers using -Wno-narrowing to ignore this and continue with the previous semantics of silently converting it, which is helpful if one's C++11 project has to include e.g. zend_API.h (which uses the -1 conversion). Such a feature is missing from gcc. $ gcc-5 -v gcc version 5.0.1 20150416 (prerelease) [gcc-5-branch revision 222148] (SUSE Linux)