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Re: [PATCH] Don't require C++ bootstrap compiler (PR bootstrap/46810)
* Jakub Jelinek wrote on Tue, Dec 07, 2010 at 08:06:56PM CET:
> On Tue, Dec 07, 2010 at 10:45:10AM -0800, Ian Lance Taylor wrote:
> > This is an example of the alternative approach I was thinking of: only
> > run the C++ tests if the C++ compiler works. Does this look OK?
>
> It could work, but I think you should
> a) rm -f conftest.*
> b) C++ ac_compile is
> $CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext
> so you should probably use $CXXFLAGS $CPPFLAGS too, not sure if
> .cc vs. .cpp extension could matter for any weird compilers.
For MSVC it makes a difference. Not sure if there is any danger of GCC
ever being compiled with it though. :-)
A compile-only test doesn't catch whether linking fails though, nor
whether preprocessing is borked for some other reason; I don't think
this is all that relevant though.
Agreed on all other accounts.
> c) >&5 should probably be >&AS_MESSAGE_LOG_FD
> > 2010-12-07 Ian Lance Taylor <iant@google.com>
> >
> > PR bootstrap/46810
> > * configure.ac: Only run C++ tests if the C++ compiler works.
Cheers,
Ralf