https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84148
--- Comment #7 from igor.v.tsimbalist at intel dot com --- (In reply to H.J. Lu from comment #6) > (In reply to igor.v.tsimbalist from comment #4) > > Created attachment 43400 [details] > > patch > > 2 questions: > > 1. Should 32-bit multilib target libraries compiled on 64-bit host > enable CET? > 2. Should 64-bit multilib target libraries compiled with 32-bit compiler > enable CET? Is there a configuration variable holding an indication of bit-ness for which the compilation of a library is done? I see there is some code in configure.ac in libgcc evaluating the host_address (32 or 64 bits) # Check 32bit or 64bit. In the case of MIPS, this really determines the # word size rather than the address size. cat > conftest.c <<EOF #if defined(__x86_64__) || (!defined(__i386__) && defined(__LP64__)) \ || defined(__mips64) host_address=64 #else host_address=32 #endif EOF eval `${CC-cc} -E conftest.c | grep host_address=` rm -f conftest.c If I use the 'host_address' in cet.m4 I got the expected results for libgcc: by default 64-bit library is CET enabled, 32-bit library is not.