GCC option to select cpu type

ksp009 · 12-09-2010, 01:08 AM

Hi

My development target environment is intel corei5 architecture. I want to build my source for i5 architecture. I am paning to use gcc 4.5.1. In the gcc manual i found an option to select the cpu type(-mtune = cpu_type).There is no i5 processor in the cpu type options.

If i use -mtune=generic, will it produce optimized code for i5 architecture or it will produce the code for generic x86_64 architecture?

Thanks

austinium · 12-09-2010, 01:20 AM

you should try the forums here:
http://www.intel.com/p/en_US/busines...=subhdr+devctr

good luck

ntubski · 12-09-2010, 09:39 AM

You can use -mtune=native to optimize programs for the computer you're compiling on. Note that the -mtune options only affects ordering of instructions, but -march will enable use of instructions only available on the specified cpu. See Intel 386 and AMD x86-64 Options.