diff options
Diffstat (limited to 'libbuild2/bin/rule.hxx')
| -rw-r--r-- | libbuild2/bin/rule.hxx | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/libbuild2/bin/rule.hxx b/libbuild2/bin/rule.hxx index 8bc30c7..fcbd0ca 100644 --- a/libbuild2/bin/rule.hxx +++ b/libbuild2/bin/rule.hxx @@ -30,19 +30,33 @@ namespace build2 apply (action, target&) const override; }; - // "Fail rule" for libul{} that issues diagnostics if someone tries to - // build this group directly. + // If metadata is false, the this is a "fail rule" for libul{} that issues + // diagnostics if someone tries to build this group directly. // - class libul_rule: public simple_rule + // If metadata is true, then this rule only matches with the explicit + // `bin.metadata` hint. In this case it picks, matches, and unmatches (if + // possible) a member for the purpose of making its metadata (for example, + // library's poptions, if it's one of the cc libraries) available. + // + // The underlying idea here is that someone else (e.g., cc::link_rule) + // makes a more informed choice and we piggy back on that decision, + // falling back to making our own based on bin.lib and bin.exe.lib. Note + // that for update this rule always returns target_state::unchanged. + // + class libul_rule: public rule { public: - libul_rule () {} + explicit + libul_rule (bool md): metadata_ (md) {} virtual bool - match (action, target&) const override; + match (action, target&, const string&, match_extra&) const override; virtual recipe - apply (action, target&) const override; + apply (action, target&, match_extra&) const override; + + private: + bool metadata_; }; // Pass-through to group members rule, similar to alias. |