diff options
Diffstat (limited to 'gcc/input.c')
| -rw-r--r-- | gcc/input.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/input.c b/gcc/input.c index 611e18b541e..1c7228a0080 100644 --- a/gcc/input.c +++ b/gcc/input.c @@ -1331,6 +1331,16 @@ get_substring_ranges_for_loc (cpp_reader *pfile, if (cpp_get_options (pfile)->track_macro_expansion != 2) return "track_macro_expansion != 2"; + /* If #line or # 44 "file"-style directives are present, then there's + no guarantee that the line numbers we have can be used to locate + the strings. For example, we might have a .i file with # directives + pointing back to lines within a .c file, but the .c file might + have been edited since the .i file was created. + In such a case, the safest course is to disable on-demand substring + locations. */ + if (line_table->seen_line_directive) + return "seen line directive"; + /* If string concatenation has occurred at STRLOC, get the locations of all of the literal tokens making up the compound string. Otherwise, just use STRLOC. */ |