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1f00e190b1
gcc/c-family/ * c-opts.c (c_common_post_options): Set divert_include hook. (cb_file_change): Fixup precedence. gcc/cp/ * cp-lang.c (LANG_HOOKS_PREPROCESS_DIVERT_INCLUDE): Override. * cp-tree.h (modules_header_p): New. (atom_divert_include): Declare. * cxx-mapper.cc (flag_fallback): New flag. (module2bmi): Deal with NULL names. (buffer::get_request): Fix off-by-one error. (read_mapping_file): Can be multiply called. Target file name can be null. (client::action): Deal with INCLUDE. (main): There can be may files after connection. Fixup networking errors. * lex.c (atom_preamble_prefix_peek): Don't rescan legacy header module. * module.c (module_preamble_end_loc): Declare here. (module_mapper::module_mapper): Prepend path for anything looking defaulty. (module_mapper::divert_include): New. (do_divert_include): New. (atom_divert_include): New. (init_module_processing): Set header mode here. * parser.c (module_preamble_end_loc): Extern. gcc/ * doc/invoke.text (C++ Modules): Document -fmodule-header. * langhooks-def.h (LANG_HOOKS_PREPROCESS_DIVERT_INCLUDE): Provide default. * langhooks.h (lang_hooks): Add preprocess_divert_include. libcpp/ * directives.c (do_include_common): Add diversion smarts. * include/cpplib.h (cpp_divert_include_t): New. (struct cpp_callbacks): Add divert_include. * line-map.c (linemap_module_loc): Missed commit. gcc/testsuite/ * g++.dg/modules/legacy-2.*: New. * g++.dg/modules/modules.exp: Fixup header compilation. From-SVN: r262229