http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55374
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-12-20 20:11:55 UTC --- cd obj*/x86_64*/libgfortran; make clean; \ make CFLAGS="-std=gnu99 -g -O2 -fsanitize=address " \ FCFLAGS="-g -O2 -fsanitize=address" LDFLAGS="-B `pwd`/../libsanitizer/asan/.libs/ -Wl,-rpath,`pwd`/../libsanitizer/asan/.libs/ -fsanitize=address" ?