From 2a0f9e035f673f1ee387924501a31990de37f18d Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 24 Apr 2015 12:29:20 +0200
Subject: Implement lib/liba/libso{} target group, shared/static library build

---
 build/bin/rule.cxx | 126 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 build/bin/rule.cxx

(limited to 'build/bin/rule.cxx')

diff --git a/build/bin/rule.cxx b/build/bin/rule.cxx
new file mode 100644
index 0000000..1b887bf
--- /dev/null
+++ b/build/bin/rule.cxx
@@ -0,0 +1,126 @@
+// file      : build/bin/rule.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
+// license   : MIT; see accompanying LICENSE file
+
+#include <build/bin/rule>
+
+#include <build/scope>
+#include <build/target>
+#include <build/algorithm>
+#include <build/diagnostics>
+
+#include <build/config/utility>
+
+#include <build/bin/target>
+
+using namespace std;
+
+namespace build
+{
+  namespace bin
+  {
+    // obj
+    //
+    void* obj_rule::
+    match (action a, target& t, const std::string&) const
+    {
+      fail << diag_doing (a, t) << " target group" <<
+        info << "explicitly select either obja{} or objso{} member";
+    }
+
+    recipe obj_rule::
+    apply (action, target&, void*) const {return empty_recipe;}
+
+    // lib
+    //
+    // The whole logic is pretty much as if we had our two group
+    // members as prerequisites.
+    //
+    void* lib_rule::
+    match (action, target& t, const std::string&) const
+    {
+      return &t;
+    }
+
+    recipe lib_rule::
+    apply (action a, target& xt, void*) const
+    {
+      lib& t (static_cast<lib&> (xt));
+
+      // Configure.
+      //
+      // The logic is as follows: if this library somehow knowns what
+      // it wants to be (i.e., the bin.lib is defined), then don't
+      // bother configuring the project-wide value.
+      //
+      const string* type (nullptr);
+
+      if (auto v = t["bin.lib"])
+        type = &v.as<const string&> ();
+      else
+      {
+        scope& root (*t.root_scope ());
+        type = &config::required (root, "config.bin.lib", "shared").first;
+        root.assign ("bin.lib") = *type;
+      }
+
+      bool ar (*type == "static" || *type == "both");
+      bool so (*type == "shared" || *type == "both");
+
+      if (!ar && !so)
+        fail << "unknown library type: " << *type <<
+          info << "'static', 'shared', or 'both' expected";
+
+      if (ar)
+      {
+        if (t.a == nullptr)
+          t.a = &static_cast<liba&> (search (prerequisite_key {
+                &liba::static_type, &t.dir, &t.name, &t.ext, nullptr}));
+
+        build::match (a, *t.a);
+      }
+
+      if (so)
+      {
+        if (t.so == nullptr)
+          t.so = &static_cast<libso&> (search (prerequisite_key {
+                &libso::static_type, &t.dir, &t.name, &t.ext, nullptr}));
+
+        build::match (a, *t.so);
+      }
+
+      return &perform;
+    }
+
+    target_state lib_rule::
+    perform (action a, target& xt)
+    {
+      lib& t (static_cast<lib&> (xt));
+
+      //@@ Not cool we have to do this again. Looks like we need
+      //   some kind of a cache vs resolved pointer, like in
+      //   prerequisite vs prerequisite_target.
+      //
+      //
+      const string& type (t["bin.lib"].as<const string&> ());
+      bool ar (type == "static" || type == "both");
+      bool so (type == "shared" || type == "both");
+
+      target* m1 (ar ? t.a : nullptr);
+      target* m2 (so ? t.so : nullptr);
+
+      if (current_mode == execution_mode::last)
+        swap (m1, m2);
+
+      target_state ts (target_state::unchanged);
+
+      if (m1 != nullptr && execute (a, *m1) == target_state::changed)
+        ts = target_state::changed;
+
+      if (m2 != nullptr && execute (a, *m2) == target_state::changed)
+        ts = target_state::changed;
+
+      return ts;
+    }
+  }
+}
-- 
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