Hi, When debugging gcc, debugger sometimes seems mad because it jumps from one place to another maybe due to the fact that some functions are inlined. How can I build a gcc in debug mode id without -O2 ? In gcc Makefile I can see that : CFLAGS_FOR_BUILD = -g -O2 CXXFLAGS_FOR_BUILD = -g -O2 BOOT_CFLAGS= -g -O2 Maybe I need to pass some flags to configure ?