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Parallel compilation #38

@chrhansk

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@chrhansk

I noticed after some debugging that the standard command

$ARCHDEFS/install_optrove

uses make internally to compile libcutest.a. Unfortunately, the compilation rule uses commands modifying the file libcutest.a in place. The compilation therefore breaks whenever multiple threads are used (i.e., using make -j<n> or by having MAKEFLAGS="-j<n>" set in the environment).

Since the behavior is unpredictable and errors of the form

/usr/bin/ar: /cutest/cutest/objects/pc64.lnx.gfo/double/libcutest.a: error reading cutest.o: file truncated 
/usr/bin/ar: /cutest/cutest/objects/pc64.lnx.gfo/double/libcutest.a: malformed archive

are not caught, the compilation can silently fail. I think it would be a good idea to put a warning in the wiki to.

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