aboutsummaryrefslogtreecommitdiff
path: root/build/cxx/rule.cxx
diff options
context:
space:
mode:
Diffstat (limited to 'build/cxx/rule.cxx')
-rw-r--r--build/cxx/rule.cxx84
1 files changed, 63 insertions, 21 deletions
diff --git a/build/cxx/rule.cxx b/build/cxx/rule.cxx
index 4c93a1a..649067e 100644
--- a/build/cxx/rule.cxx
+++ b/build/cxx/rule.cxx
@@ -69,17 +69,34 @@ namespace build
// Search and match all the existing prerequisites. The injection
// code (below) takes care of the ones it is adding.
//
- search_and_match (a, t);
+ // When cleaning, ignore prerequisites that are not in the same
+ // or a subdirectory of ours.
+ //
+ switch (a.operation ())
+ {
+ case update_id: search_and_match (a, t); break;
+ case clean_id: search_and_match (a, t, t.dir); break;
+ default: assert (false);
+ }
- // Inject additional prerequisites.
+ // Inject additional prerequisites. For now we only do it for
+ // update.
//
- auto& sp (*static_cast<prerequisite*> (v));
- auto& st (dynamic_cast<cxx&> (*sp.target));
+ if (a.operation () == update_id)
+ {
+ auto& sp (*static_cast<prerequisite*> (v));
+ auto& st (dynamic_cast<cxx&> (*sp.target));
- if (st.mtime () != timestamp_nonexistent)
- inject_prerequisites (a, o, st, sp.scope);
+ if (st.mtime () != timestamp_nonexistent)
+ inject_prerequisites (a, o, st, sp.scope);
+ }
- return &update;
+ switch (a)
+ {
+ case perform_update_id: return &perform_update;
+ case perform_clean_id: return &perform_clean_file;
+ default: return noop_recipe;
+ }
}
// Return the next make prerequisite starting from the specified
@@ -215,9 +232,7 @@ namespace build
// Resolve to target.
//
- path_target& t (
- dynamic_cast<path_target&> (
- p.target != nullptr ? *p.target : search (p)));
+ path_target& t (dynamic_cast<path_target&> (search (p)));
// Assign path.
//
@@ -251,7 +266,7 @@ namespace build
}
target_state compile::
- update (action a, target& t)
+ perform_update (action a, target& t)
{
obj& o (dynamic_cast<obj&> (t));
cxx* s (execute_prerequisites<cxx> (a, o, o.mtime ()));
@@ -359,7 +374,7 @@ namespace build
}
// We will only chain a C source if there is also a C++ source or we
- // we explicitly told to.
+ // were explicitly told to.
//
if (seen_c && !seen_cxx && hint < "cxx")
{
@@ -397,10 +412,15 @@ namespace build
if (p.type.id != typeid (c) && p.type.id != typeid (cxx))
{
- if (p.target == nullptr)
- search (p);
+ // The same logic as in search_and_match().
+ //
+ target& pt (search (p));
+
+ if (a.operation () == clean_id && !pt.dir.sub (e.dir))
+ p.target = nullptr; // Ignore.
+ else
+ build::match (a, pt);
- build::match (a, *p.target);
continue;
}
@@ -449,6 +469,26 @@ namespace build
//
target& ot (search (op));
+ // If we are cleaning, check that this target is in the same or
+ // a subdirectory of ours.
+ //
+ // If it is not, then we are effectively leaving the prerequisites
+ // half-rewritten (we only rewrite those that we should clean).
+ // What will happen if, say, after clean we have update? Well,
+ // update will come and finish the rewrite process (it will even
+ // reuse op that we have created but then ignored). So all is good.
+ //
+ if (a.operation () == clean_id && !ot.dir.sub (e.dir))
+ {
+ // If we shouldn't clean obj{}, then it is fair to assume
+ // we shouldn't clean cxx{} either (generated source will
+ // be in the same directory as obj{} and if not, well, go
+ // and find yourself another build system).
+ //
+ p.target = nullptr; // Skip.
+ continue;
+ }
+
// If this target already exists, then it needs to be "compatible"
// with what we are doing here.
//
@@ -461,7 +501,6 @@ namespace build
// work out, then we fail, in which case searching and matching
// speculatively doesn't really hurt.
//
- //
prerequisite* cp1 (nullptr);
for (prerequisite& p: ot.prerequisites)
{
@@ -488,9 +527,7 @@ namespace build
if (cp1 != nullptr)
{
build::match (a, ot); // Now cp1 should be resolved.
-
- if (cp.target == nullptr)
- search (cp); // Our own prerequisite, so this is ok.
+ search (cp); // Our own prerequisite, so this is ok.
if (cp.target != cp1->target)
fail << "synthesized target for prerequisite " << cp
@@ -510,11 +547,16 @@ namespace build
pr = op;
}
- return &update;
+ switch (a)
+ {
+ case perform_update_id: return &perform_update;
+ case perform_clean_id: return &perform_clean_file;
+ default: return noop_recipe;
+ }
}
target_state link::
- update (action a, target& t)
+ perform_update (action a, target& t)
{
// @@ Q:
//