This is what happened after 40 minutes in "make": for: gcc 4.9.1 error: ========== using:internal compiler error in "make" related to gimple.h and ipa-split.c: compiler: gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-4) Copyright (C) 2010 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. on x86_64 architecture . /home/david/scratch2/gcc-4.9.1/configure --disable-multilib (configure line) make In file included from /home/david/scratch2/gcc-4.9.1/gcc/ipa-split.c:86:0: /home/david/scratch2/gcc-4.9.1/gcc/gimple.h: In function ‘T* as_a(U*) [with T = const gimple_statement_asm; U = const gimple_statement_base]’: /home/david/scratch2/gcc-4.9.1/gcc/gimple.h:3197:42: internal compiler error: Segmentation fault as_a <const gimple_statement_asm> (gs); ^ Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. make[3]: *** [ipa-split.o] Error 1 make[3]: Leaving directory `/home/david/Build/gcc' make[2]: *** [all-stage3-gcc] Error 2 make[2]: Leaving directory `/home/david/Build' make[1]: *** [stage3-bubble] Error 2 make[1]: Leaving directory `/home/david/Build' make: *** [all] Error 2 == David Bernier