diff options
Diffstat (limited to 'libcpp/files.c')
| -rw-r--r-- | libcpp/files.c | 44 |
1 files changed, 37 insertions, 7 deletions
diff --git a/libcpp/files.c b/libcpp/files.c index 6fc24e2..ecaa274 100644 --- a/libcpp/files.c +++ b/libcpp/files.c @@ -110,6 +110,9 @@ struct _cpp_file /* If BUFFER above contains the true contents of the file. */ bool buffer_valid; + + /* If this file is implicitly preincluded. */ + bool implicit_preinclude; }; /* A singly-linked list for all searches for a given file name, with @@ -291,7 +294,8 @@ pch_open_file (cpp_reader *pfile, _cpp_file *file, bool *invalid_pch) /* If the file is not included as first include from either the toplevel file or the command-line it is not a valid use of PCH. */ if (pfile->all_files - && pfile->all_files->next_file) + && pfile->all_files->next_file + && !pfile->all_files->next_file->implicit_preinclude) return false; flen = strlen (path); @@ -480,9 +484,14 @@ _cpp_find_failed (_cpp_file *file) descriptor. FD can be -1 if the file was found in the cache and had previously been closed. To open it again pass the return value to open_file(). + + If IMPLICIT_PREINCLUDE then it is OK for the file to be missing. + If present, it is OK for a precompiled header to be included after + it. */ _cpp_file * -_cpp_find_file (cpp_reader *pfile, const char *fname, cpp_dir *start_dir, bool fake, int angle_brackets) +_cpp_find_file (cpp_reader *pfile, const char *fname, cpp_dir *start_dir, + bool fake, int angle_brackets, bool implicit_preinclude) { struct file_hash_entry *entry, **hash_slot; _cpp_file *file; @@ -506,6 +515,7 @@ _cpp_find_file (cpp_reader *pfile, const char *fname, cpp_dir *start_dir, bool f return entry->u.file; file = make_cpp_file (pfile, start_dir, fname); + file->implicit_preinclude = implicit_preinclude; /* Try each path in the include chain. */ for (; !fake ;) @@ -535,7 +545,14 @@ _cpp_find_file (cpp_reader *pfile, const char *fname, cpp_dir *start_dir, bool f cpp_error (pfile, CPP_DL_ERROR, "use -Winvalid-pch for more information"); } - open_file_failed (pfile, file, angle_brackets); + if (implicit_preinclude) + { + free ((char *) file->name); + free (file); + return NULL; + } + else + open_file_failed (pfile, file, angle_brackets); break; } @@ -950,7 +967,10 @@ _cpp_stack_include (cpp_reader *pfile, const char *fname, int angle_brackets, if (!dir) return false; - file = _cpp_find_file (pfile, fname, dir, false, angle_brackets); + file = _cpp_find_file (pfile, fname, dir, false, angle_brackets, + type == IT_DEFAULT); + if (type == IT_DEFAULT && file == NULL) + return false; /* Compensate for the increment in linemap_add that occurs in _cpp_stack_file. In the case of a normal #include, we're @@ -960,7 +980,8 @@ _cpp_stack_include (cpp_reader *pfile, const char *fname, int angle_brackets, This does not apply if we found a PCH file (in which case linemap_add is not called) or we were included from the command-line. */ - if (file->pchname == NULL && file->err_no == 0 && type != IT_CMDLINE) + if (file->pchname == NULL && file->err_no == 0 + && type != IT_CMDLINE && type != IT_DEFAULT) pfile->line_table->highest_location--; return _cpp_stack_file (pfile, file, type == IT_IMPORT); @@ -1243,7 +1264,7 @@ cpp_clear_file_cache (cpp_reader *pfile) void _cpp_fake_include (cpp_reader *pfile, const char *fname) { - _cpp_find_file (pfile, fname, pfile->buffer->file->dir, true, 0); + _cpp_find_file (pfile, fname, pfile->buffer->file->dir, true, 0, false); } /* Not everyone who wants to set system-header-ness on a buffer can @@ -1361,7 +1382,7 @@ _cpp_compare_file_date (cpp_reader *pfile, const char *fname, if (!dir) return -1; - file = _cpp_find_file (pfile, fname, dir, false, angle_brackets); + file = _cpp_find_file (pfile, fname, dir, false, angle_brackets, false); if (file->err_no) return -1; @@ -1382,6 +1403,15 @@ cpp_push_include (cpp_reader *pfile, const char *fname) return _cpp_stack_include (pfile, fname, false, IT_CMDLINE); } +/* Pushes the given file, implicitly included at the start of a + compilation, onto the buffer stack but without any errors if the + file is not found. Returns nonzero if successful. */ +bool +cpp_push_default_include (cpp_reader *pfile, const char *fname) +{ + return _cpp_stack_include (pfile, fname, true, IT_DEFAULT); +} + /* Do appropriate cleanup when a file INC's buffer is popped off the input stack. */ void |