On Tue, January 22, 2013 6:51 pm, Binh Pham wrote:
> Hi,
> I am having error while trying to compile gem5 for x86:
> scons build/X86/gem5.opt
> Error Don't know what compiler options to use for your compiler.
>        compiler: None
>        version: COMMAND NOT FOUND!
>        If you're trying to use a compiler other than GCC
>        or clang, there appears to be something wrong with your
>        environment.
>
>        If you are trying to use a compiler other than those listed
>        above you will need to ease fix SConstruct and
>        src/SConscript to support that compiler.
>
> I do have gcc and g++ installed. Digging into the SConstruct file, I found
> that the main['CXX'] is empty after the line: global_vars.Update(main) is
> executed (Before that line, main['CXX'] is g++. Because of that, the error
> above was printed.
> I don't have any insight about the Update(main) function to figure out why
> it failed. So I would appreciate if someone could help.
>

You can try to set variables CXX, CC on the command line when you issue
the scons command. For example:  scons -j 16  CXX='/usr/bin/g++'
build/X86/gem5.debug.

Read more about the build system here -- http://gem5.org/Build_System

--
Nilay

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