[Octave-patch-tracker] [patch #8906] configure check support for c11 and c++11

[Mike Miller]

Follow-up Comment #5, patch #8906 (project octave):

Something like this would be cleaner.


octave_save_CXXFLAGS=$CXXFLAGS
AX_CXX_COMPILE_STDCXX([11], [ext], [optional])
XTRA_CXXFLAGS="$XTRA_CXXFLAGS $CXXFLAGS"
CXXFLAGS=$octave_save_CXXFLAGS


I have no objection to using AX_CXX_COMPILE_STDCXX, but it doesn't handle the
C11 option that you also wanted to add.

Most of the complexity of AX_CXX_COMPILE_STDCXX is checking various C++11
features to make sure the compiler actually does support all of C++11, do we
care about that at this point?

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