diff options
| -rw-r--r-- | libbuild2/cc/compile-rule.cxx | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/libbuild2/cc/compile-rule.cxx b/libbuild2/cc/compile-rule.cxx index ada0cc6..8e1cc81 100644 --- a/libbuild2/cc/compile-rule.cxx +++ b/libbuild2/cc/compile-rule.cxx @@ -5006,7 +5006,15 @@ namespace build2 // accurate (parts of the translation unit could have been // #ifdef'ed out; see __build2_preprocess). // - return reprocess ? string () : move (p.checksum); + // Also, don't use the checksum for header units since it ignores + // preprocessor directives and may therefore cause us to ignore a + // change to an exported macro. @@ TODO: maybe we should add a + // flag to the parser not to waste time calculating the checksum + // in these cases. + // + return reprocess || ut == unit_type::module_header + ? string () + : move (p.checksum); } // Fall through. |