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Cross compile 32bit and 64bit [message #1386256]

Mon, 16 June 2014 04:32

Eclipse User

Hello CDT'ers',

I am brand new to CDT just setup my first project and for this simple C project I need to create 2 sets of executes, 32bit and 64bit. I'm working on an Ubuntu machine and using the Linux GCC toolchain. I just need to support Linux systems for my runtime, but need a 32bit and 64bit variety. I know that at low level gcc has an option for '-m32' or '-m64' to compile down to 32bit or 64bit accordingly.

Do CDT build configurations support setting this flag automatically for me (I select some radio button/checkbox) or do I need to go into the build configurations under the miscellaneous and set '-m32' under the GCC C Linker > Miscellaneous > Linker flags entry field? What is the best way to accomplish this?

Thanks!

Re: Cross compile 32bit and 64bit [message #1386277 is a reply to message #1386256]

Mon, 16 June 2014 06:21

Eclipse User

There is no automatic support. But your approach (two configurations with different compiler settings) is the correct way. Besides the linker settings you must also set the "-m32" flag for the compiler (C and C++).

Re: Cross compile 32bit and 64bit [message #1386356 is a reply to message #1386277]

Mon, 16 June 2014 20:33

Eclipse User

Thanks Axel for your confirmation. I was able to get it working just as you said, adding '-m32' or '-m64' in each of the compiler/linker setting configuration pages.

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