diff options
Diffstat (limited to 'build/cxx/rule.cxx')
| -rw-r--r-- | build/cxx/rule.cxx | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/build/cxx/rule.cxx b/build/cxx/rule.cxx index eb61bd1..e495c27 100644 --- a/build/cxx/rule.cxx +++ b/build/cxx/rule.cxx @@ -136,7 +136,7 @@ namespace build const char* args[] = { "g++-4.9", "-std=c++14", - "-I", src_root.string ().c_str (), + "-I", ds["src_root"].as<const path&> ().string ().c_str (), "-MM", //@@ -M "-MG", // Treat missing headers as generated. "-MQ", "*", // Quoted target (older version can't handle empty name). @@ -269,7 +269,7 @@ namespace build "g++-4.9", "-std=c++14", "-g", - "-I", src_root.string ().c_str (), + "-I", o.prerequisites[0].get ().scope["src_root"].as<const path&> ().string ().c_str (), "-c", "-o", ro.string ().c_str (), rs.string ().c_str (), @@ -382,7 +382,13 @@ namespace build if (e.path ().empty ()) e.path (e.dir / path (e.name)); - // Process prerequisited: do rule chaining for C and C++ source + // We may need the project roots for rule chaining (see below). + // We will resolve them lazily only if needed. + // + const path* out_root (nullptr); + const path* src_root (nullptr); + + // Process prerequisites: do rule chaining for C and C++ source // files as well as search and match. // for (auto& pr: t.prerequisites) @@ -398,6 +404,17 @@ namespace build continue; } + if (out_root == nullptr) + { + // Which scope shall we use to resolve the roots? Unlikely, + // but possible, the prerequisite is from a different project + // altogether. So we are going to use the target's project. + // + scope& s (scopes.find (e.dir)); + out_root = &s["out_root"].as<const path&> (); + src_root = &s["src_root"].as<const path&> (); + } + prerequisite& cp (p); // Come up with the obj{} prerequisite. The c(xx){} prerequisite @@ -408,15 +425,15 @@ namespace build // possible it is under out_root (e.g., generated source). // path d; - if (cp.dir.relative () || cp.dir.sub (out_root)) + if (cp.dir.relative () || cp.dir.sub (*out_root)) d = cp.dir; else { - if (!cp.dir.sub (src_root)) + if (!cp.dir.sub (*src_root)) fail << "out of project prerequisite " << cp << info << "specify corresponding obj{} target explicitly"; - d = out_root / cp.dir.leaf (src_root); + d = *out_root / cp.dir.leaf (*src_root); } prerequisite& op ( |