Re: testsuite failure: multiple languages

[Ralf Wildenhues]

Hi Eric,

* Eric Blake wrote on Mon, Mar 30, 2009 at 07:37:26PM CEST:
> '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.

Untested:
In a separate configure.ac script compiled and run before the main part
of the test, have something like this (without any CXX stuff in there)?

  AC_PROG_CC
  AC_COMPILE_IFSELSE([
    AC_LANG_PROGRAM([[
      #ifdef __cplusplus
      choke me
      #endif
    ]])], [], AS_EXIT([77]))

Cheers,
Ralf