I'm faced with graphic glitches, desktop hanging and finally random Xorg crashes when libdrm is built with gcc 4.8 (latest final 4.8.1 release). dmesg gives random graphics related error messages using a nvidia card here with nouveau. The system runs well when I compile latest libdrm with gcc 4.7.3 and also with clang (llvm 3.3). This reminds me a similar issue I'm faced with kernel xfs file system when build with gcc 4.8 that I have reported under: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57436 . Our ArchLinux default flags are: CFLAGS="-march=x86-64 -mtune=generic -O2 -pipe -fstack-protector --param=ssp-buffer-size=4" I've tried new gcc 4.8 and replacing -O2 with -O1, with -O0 and with -fno-aggressive-loop-optimizations with the same result of a broken X desktop. With libdrm on my desktop I can test everything you want to track this issue down. Right now I can't do this with my kernel issue. Please give me suggestions how to find out what is broken with gcc 4.8. So far I've built it also with -save-temps to keep .s files but I'm not sure what to compare. -Andy ArchLinux
