Hi all,

When I ran the test script under $GEM5/tests using command "python main.py run" 
on a machine previously without any gem5 simulator built, the script built 5 
different gem5.opt simulators before running test suites.

However, the file sizes of the simulators are pretty large, shown below. The 
gem5.opt for RISC-V is 4.4GB and failed with error message "cannot allocate 
memory".
1.8G    build/ARM/gem5.opt
858M    build/NULL/gem5.opt
4.4G    build/RISCV/gem5.opt
1.5G    build/X86/gem5.opt
1.5G    build/X86_MSI/gem5.opt

On the other hand, the gem5.debug simulation was built using "scons 
build/RISCV/gem5.debug -j 8" and its size is much smaller.
522M    build/RISCV/gem5.debug

Are these caused by different compiler or linker settings?

I was surprised by a large number of failed tests because RISCV gem5.opt could 
not run. Hopefully, this could be fixed somehow. Thanks.

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