Frame pointer register name

Ian Lance Taylor iant@google.com
Mon Jan 17 18:22:00 GMT 2011


Amittai Aviram <amittai.aviram@yale.edu> writes:

> Oh, I see!  The build includes both 64-bit and 32-bit modes (so that the -m32 option will work), so I get the error when the build process gets to that point.  What preprocessor symbol can I use in my code to identify 64 versus 32 bit modes for conditional compilation?  Do GCC's Makefiles set __x86_64__ and __i386__?  Thanks!

Yes, #ifdef __x86_64__ will reliably detect 64-bit mode.

Ian



More information about the Gcc-help mailing list