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-rw-r--r--libbuild2/build/script/parser.hxx60
1 files changed, 55 insertions, 5 deletions
diff --git a/libbuild2/build/script/parser.hxx b/libbuild2/build/script/parser.hxx
index da15509..bbdb052 100644
--- a/libbuild2/build/script/parser.hxx
+++ b/libbuild2/build/script/parser.hxx
@@ -127,6 +127,46 @@ namespace build2
dd, &update, &deferred_failure, mt);
}
+ // This version doesn't actually execute the depdb-dyndep builtin (but
+ // may execute some variable assignments) instead returning all the
+ // information (extracted from options) necessary to implement the
+ // depdb-dyndep --byproduct logic (which fits better into the rule
+ // implementation).
+ //
+ enum class dyndep_format {make};
+
+ struct dyndep_byproduct
+ {
+ location_value location;
+ dyndep_format format;
+ optional<dir_path> cwd;
+ path file;
+ string what;
+ const target_type* default_type;
+ };
+
+ dyndep_byproduct
+ execute_depdb_preamble_dyndep_byproduct (
+ action a, const scope& base, const file& t,
+ environment& e, const script& s, runner& r,
+ depdb& dd)
+ {
+ // This is getting really ugly (we also don't really need to pass
+ // depdb here). One day we will find a better way...
+ //
+ bool update, deferred_failure; // Dymmy.
+ timestamp mt; // Dummy.
+
+ dyndep_byproduct v;
+ exec_depdb_preamble (
+ a, base, t,
+ e, s, r,
+ s.depdb_preamble.begin () + *s.depdb_dyndep,
+ s.depdb_preamble.end (),
+ dd, &update, &deferred_failure, mt, &v);
+ return v;
+ }
+
// Parse a special builtin line into names, performing the variable
// and pattern expansions. If omit_builtin is true, then omit the
// builtin name from the result.
@@ -166,7 +206,8 @@ namespace build2
depdb&,
bool* update = nullptr,
bool* deferred_failure = nullptr,
- optional<timestamp> mt = nullopt);
+ optional<timestamp> mt = nullopt,
+ dyndep_byproduct* = nullptr);
void
exec_depdb_dyndep (token&, build2::script::token_type&,
@@ -175,7 +216,8 @@ namespace build2
depdb&,
bool& update,
bool& deferred_failure,
- timestamp);
+ timestamp,
+ dyndep_byproduct*);
// Helpers.
//
@@ -274,13 +316,21 @@ namespace build2
// depdb env <var-names> - Track the environment variables change as a
// hash.
//
- // depdb dyndep ... - Extract dynamic dependency information.
- // Can only be the last depdb builtin call
- // in the preamble.
+ // depdb dyndep ... - Extract dynamic dependency information. Can
+ // only be the last depdb builtin call in the
+ // preamble. Note that such dependencies don't
+ // end up in $<. We also don't cause clean of
+ // such dependencies (since there may be no .d
+ // file) -- they should also be listed as
+ // static prerequisites of some other target
+ // (e.g., lib{} for headers) or a custom clean
+ // recipe should be provided.
+ //
//
optional<location> depdb_clear_; // depdb-clear location.
optional<pair<location, size_t>>
depdb_dyndep_; // depdb-dyndep location/position.
+ bool depdb_dyndep_byproduct_ = false; // --byproduct
lines depdb_preamble_; // Note: excluding depdb-clear.
// If present, the first impure function called in the body of the