scotch fails to build with gcc

[larsgrobe (Lars O Grobe)]

Dear all,

I just updated to Sonoma and re-install my ports. Scotch is failing to build with the +gcc12 variant:

clang: error: invalid library name in argument '-stdlib=macports-libstdc++'

It seems that the variant is ignored when setting the CXX variable (I would expect g++-mp-12 rather than clang to be executed):

:info:configure -- The C compiler identification is GNU 12.3.0
:info:configure -- The CXX compiler identification is Clang 15.0.7

I wonder if this is related to ​https://trac.macports.org/ticket/62678

Best, Lars.