http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59733
--- Comment #9 from Kostya Serebryany <kcc at gcc dot gnu.org> --- > It still fails for me. It has nothing to do with "make -jN". When I I tried running this on the fresh gcc trunk. During the 3-rd stage I get this: checking how to run the C preprocessor... ../libiberty/libiberty.a(regex.o): In function `byte_compile_range': ... gcc-boot/libiberty/../../gcc/libiberty/regex.c:4495: undefined reference to `__asan_report_load1' Before that the builds works fine, but compilation of insn-recog.c with asan-ified gcc is indeed expensive: takes ~8 minutes and 4+Gb RAM This excessive memory usage may be the reason of your OOM in case you have some sort of limit (Are you by any chance building in x32 mode?) non-asanified build of insn-recog.c takes ~3.5 minutes and 700M RAM. The asan slowdown here is reasonable, but the memory overhead is surprisingly large...