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1f9db6929d
This defect really required building header-units and include translation of pieces of the standard library. This adds smarts to the modules test harness to do that -- accept .X files as the source file, but provide '-x c++-system-header $HDR' in the options. The .X file will be considered by the driver to be a linker script and ignored (with a warning). Using this we can add 2 tests that end up building list_initializer and iostream, along with a test that iostream's build include-translates list_initializer's #include. That discovered a set of issues with the -flang-info-include-translate=HDR handling, also fixed and documented here. PR c++/99023 gcc/cp/ * module.cc (canonicalize_header_name): Use cpp_probe_header_unit. (maybe_translate_include): Fix note_includes comparison. (init_modules): Fix note_includes string termination. libcpp/ * include/cpplib.h (cpp_find_header_unit): Rename to ... (cpp_probe_header_unit): ... this. * internal.h (_cp_find_header_unit): Declare. * files.c (cpp_find_header_unit): Break apart to .. (test_header_unit): ... this, and ... (_cpp_find_header_unit): ... and, or and ... (cpp_probe_header_unit): ... this. * macro.c (cpp_get_token_1): Call _cpp_find_header_unit. gcc/ * doc/invoke.texi (flang-info-include-translate): Document header lookup behaviour. gcc/testsuite/ * g++.dg/modules/modules.exp: Bail on cross-testing. Add support for .X files. * g++.dg/modules/pr99023_a.X: New. * g++.dg/modules/pr99023_b.X: New.