https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123976
--- Comment #161 from Iain Sandoe <iains at gcc dot gnu.org> --- (In reply to Peter Dyballa from comment #160) MP = macports - you are still using macports content to do your build. ----- you might want to put the MP PATH at the end of your PATH and then specify the bootstrap compiler with CC=... and CXX=.. supplying the installed names of the C and C++ gcc-10 bootstrap compiler. That should minimise the chances of some random executable from the MP install interfering with the build .. .. but still you have to simplify the conditions until the compiler builds. ----- Until you can isolate what change to configuration or build tools causes the issue we are stuck
