__x86_64__        479 gc/include/gc.h # if defined(__i386__) || defined(__x86_64__)
__x86_64__        229 gc/include/private/gcconfig.h # if defined(LINUX) && defined(__x86_64__)
__x86_64__        329 gc/include/private/gcconfig.h # if defined(__NetBSD__) && defined(__x86_64__)