Hi, how should I change/set CFLAGS/CXXFLAGS/CHOST if I want to have system which can be easily migrated between AMD64 and Intel/Core without recompilation? I have a few virtual servers which I can not move from one arch to the other, as they have hw-specific CFLAGS (different host-server hardware, both AMD64 and EM64T):
I have systems with Athlon64/X2 and Core2Quad, with settings: CFLAGS="-march=athlon64 -O2 -pipe" CFLAGS="-march=core2 -O2 -pipe" CHOST is always "x86_64-pc-linux-gnu". I'm not sure "-mtune=generic" is the right solution, because it would generate code for IA32/AMD64/EM64T (if I understand gcc manual correctly, for both 32bit as well as 64bit HW). What I'm looking for are some generic 64bit settings only for AMD64/EM64T (not 32bit/IA32) similar as for distros with binary distributions (i.e. I can download Ubuntu either 32bit or 64bit version, no other hardware-specific difference). I know with "universal" 64bit binaries I'm going to loose some pefrormance, but for me flexibility with migration would overweight this disadvantage... Jarry -- _______________________________________________________________ This mailbox accepts e-mails only from selected mailing-lists! Everything else is considered to be spam and therefore deleted.
