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a29f481bbc
Within a source file, #include is translated to import if a suitable header unit is available, but this wasn't working with -include. This turned out to be because we suppressed the translation before the beginning of the main file. After removing that, I had to tweak libcpp file handling to accommodate the way it moves from an -include to the main file. gcc/ChangeLog: * doc/invoke.texi (C++ Modules): Mention -include. gcc/cp/ChangeLog: * module.cc (maybe_translate_include): Allow before the main file. libcpp/ChangeLog: * files.cc (_cpp_stack_file): LC_ENTER for -include header unit. gcc/testsuite/ChangeLog: * g++.dg/modules/dashinclude-1_b.C: New test. * g++.dg/modules/dashinclude-1_a.H: New test.