mozconfig: export CC=clang export CXX=clang++ export CCACHE_COMPRESS="" export CCACHE_CPP2="yes" export CFLAGS="-fcolor-diagnostics" export CXXFLAGS="-fcolor-diagnostics" . $topsrcdir/browser/config/mozconfig mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/obj-ff-opt32 mk_add_options AUTOCLOBBER=1 ac_add_options --enable-optimize ac_add_options --disable-debug ac_add_options --enable-profiling error: 20:17.87 /moz/src.1347035/media/webrtc/trunk/webrtc/base/task_queue_libevent.cc:237:19: error: non-constant-expression cannot be narrowed from type 'unsigned int' to '__time_t' (aka 'long') in initializer list [-Wc++11-narrowing] 20:17.87 timeval tv = {milliseconds / 1000, 20:17.87 ^~~~~~~~~~~~~~~~~~~ 20:17.87 /moz/src.1347035/media/webrtc/trunk/webrtc/base/task_queue_libevent.cc:237:19: note: insert an explicit cast to silence this issue 20:17.87 timeval tv = {milliseconds / 1000, 20:17.87 ^~~~~~~~~~~~~~~~~~~ 20:17.87 static_cast<__time_t>( )

Fixes the warning as the compiler suggests.

You probably want to cast to time_t, not __time_t (the latter is an internal compiler specific typedef AFAIK. Also note that this is upstream code AFAIK which we may not be allowed to modify locally.

Thanks for pointing out I had used __time_t. We have already had to add a cast in the following line over in Bug 1375238 to fix another clang warning, so there's a precedent for fixing these.

Pushed by dminor@mozilla.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/2b3851740c1b Fix build error on Linux 32 bit due to a warning in task_queue_libevent.cc with clang 4.0; r=jesup