diff options
Diffstat (limited to 'libbuild2/cc/compile-rule.cxx')
| -rw-r--r-- | libbuild2/cc/compile-rule.cxx | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/libbuild2/cc/compile-rule.cxx b/libbuild2/cc/compile-rule.cxx index 29a26b5..c8955bc 100644 --- a/libbuild2/cc/compile-rule.cxx +++ b/libbuild2/cc/compile-rule.cxx @@ -1544,8 +1544,20 @@ namespace build2 // to keep re-validating the file on every subsequent dry-run as well // on the real run). // - if (u && dd.reading () && !ctx.dry_run_option) - dd.touch = timestamp_unknown; + if (u && dd.reading ()) + { + // What will happen if dry_run_option is true but we still end up + // performing a non-dry-run update due to update during match or + // load? In this case the target will become up-to-date and we will + // keep re-validating the cache until the depdb will get touched due + // to other reasons, which would be bad. So it feels like the least + // bad option is to keep re-touching the database on dry-run. + // +#if 0 + if (!ctx.dry_run_option) +#endif + dd.touch = timestamp_unknown; + } dd.close (false /* mtime_check */); md.dd = move (dd.path); @@ -4042,6 +4054,10 @@ namespace build2 // auto fail = [&ctx] (const auto& h) -> optional<bool> { + // Note that this test will give a false negative if this target + // ends up being updated during load or match. At least it's + // conservative. + // bool df (!ctx.match_only && !ctx.dry_run_option); diag_record dr; @@ -4104,7 +4120,6 @@ namespace build2 this] (path hp, path bp, timestamp mt) -> optional<bool> { context& ctx (t.ctx); - bool df (!ctx.match_only && !ctx.dry_run_option); const file* ht ( enter_header (a, bs, t, li, @@ -4113,6 +4128,12 @@ namespace build2 if (ht == nullptr) // hp is still valid. { + // Note that this test will give a false negative if this target + // ends up being updated during load or match. At least it's + // conservative. + // + bool df (!ctx.match_only && !ctx.dry_run_option); + diag_record dr; dr << error << "header " << hp << " not found and no rule to " << "generate it"; |