testsuite failure: multiple languages

[Eric Blake]

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'make -C tests maintainer-check-c++' fails the 'Multiple languages' test,
since you can't use C++ to compile a C-only program.  Generally, autoconf
tries to allow the use of a C++ compiler in place of a C compiler (that
is, most of autoconf tries to target the intersection of the two
languages, rather than sticking with strict C), hence the
'maintainer-check-c++' target.  But we need a way to skip this particular
test when CC is not a C compiler, and I don't have a good idea for it.  At
any rate, I'm probably going to go through with the beta 2.64 release
without fixing this particular maintainer failure.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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