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-rw-r--r--build/cxx/compile.cxx18
1 files changed, 15 insertions, 3 deletions
diff --git a/build/cxx/compile.cxx b/build/cxx/compile.cxx
index 4095598..ae1ebe2 100644
--- a/build/cxx/compile.cxx
+++ b/build/cxx/compile.cxx
@@ -212,8 +212,16 @@ namespace build
{
tracer trace ("cxx::append_prefixes");
+ // If this target does not belong to any project (e.g, an
+ // "imported as installed" library), then it can't possibly
+ // generate any headers for us.
+ //
+ scope* rs (t.base_scope ().root_scope ());
+ if (rs == nullptr)
+ return;
+
const dir_path& out_base (t.dir);
- const dir_path& out_root (t.root_scope ().path ());
+ const dir_path& out_root (rs->path ());
if (auto val = t[var])
{
@@ -558,9 +566,13 @@ namespace build
{
const dir_path& d (f.directory ());
i = pm.upper_bound (d);
- --i; // Greatest less than.
- if (!d.sub (i->first)) // We might still not be a sub.
+ // Get the greatest less than, if any. We might
+ // still not be a sub. Note also that we still
+ // have to check the last element is upper_bound()
+ // returned end().
+ //
+ if (i == pm.begin () || !d.sub ((--i)->first))
i = pm.end ();
}