942497ad74
When the file name for a #include directive is the result of stringifying a macro argument, libcpp needs to take some care to get the whitespace correct; in particular stringify_arg() needs to see a CPP_PADDING token between macro tokens so that it can figure out when to output space between tokens. The CPP_PADDING tokens are not normally generated when handling a preprocessor directive, but for #include-like directives, libcpp sets the state variable pfile->state.directive_wants_padding to TRUE so that the CPP_PADDING tokens will be output, and then everything works fine for computed includes. As the PR points out, things do not work fine for __has_include. Fix that by setting the state variable the same as is done for #include. libcpp/ChangeLog: PR preprocessor/110558 * macro.cc (builtin_has_include): Set pfile->state.directive_wants_padding prior to lexing the file name, in case it comes from macro expansion. gcc/testsuite/ChangeLog: PR preprocessor/110558 * c-c++-common/cpp/has-include-2.c: New test. * c-c++-common/cpp/has-include-2.h: New test. |
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