Make GN public configs apply libs to targets.

tools/gn/target_unittest.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "tools/gn/build_settings.h"
 #include "tools/gn/config.h"
 #include "tools/gn/scheduler.h"
 #include "tools/gn/settings.h"
 #include "tools/gn/target.h"
@@ skipping 368 matching lines @@
   product.private_deps().push_back(LabelTargetPair(&testlib));
   ASSERT_FALSE(product.OnResolved(&err));
 }
 
 TEST(Target, PublicConfigs) {
   TestWithScope setup;
   Err err;
 
   Label pub_config_label(SourceDir("//a/"), "pubconfig");
   Config pub_config(setup.settings(), pub_config_label);
+  std::string lib_name("testlib");
+  pub_config.own_values().libs().push_back(lib_name);
   ASSERT_TRUE(pub_config.OnResolved(&err));
 
   // This is the destination target that has a public config.
   TestTarget dest(setup, "//a:a", Target::SOURCE_SET);
   dest.public_configs().push_back(LabelConfigPair(&pub_config));
   ASSERT_TRUE(dest.OnResolved(&err));
 
   // This target has a public dependency on dest.
   TestTarget pub(setup, "//a:pub", Target::SOURCE_SET);
   pub.public_deps().push_back(LabelTargetPair(&dest));
   ASSERT_TRUE(pub.OnResolved(&err));
 
   // Depending on the target with the public dependency should forward dest's
   // to the current target.
   TestTarget dep_on_pub(setup, "//a:dop", Target::SOURCE_SET);
   dep_on_pub.private_deps().push_back(LabelTargetPair(&pub));
   ASSERT_TRUE(dep_on_pub.OnResolved(&err));
   ASSERT_EQ(1u, dep_on_pub.configs().size());
   EXPECT_EQ(&pub_config, dep_on_pub.configs()[0].ptr);
 
+  // Libs have special handling, check that they were forwarded from the
+  // public config to all_libs.
+  ASSERT_EQ(1u, dep_on_pub.all_libs().size());
+  ASSERT_EQ(lib_name, dep_on_pub.all_libs()[0]);
+
   // This target has a private dependency on dest for forwards configs.
   TestTarget forward(setup, "//a:f", Target::SOURCE_SET);
   forward.private_deps().push_back(LabelTargetPair(&dest));
   ASSERT_TRUE(forward.OnResolved(&err));
 }
 
 // Tests that different link/depend outputs work for solink tools.
 TEST(Target, LinkAndDepOutputs) {
   TestWithScope setup;
   Err err;
@@ skipping 207 matching lines @@
       "\n"
       "From //foo:bar\n"
       "  header: pch.h\n"
       "  source: //pcs.cc\n"
       "\n"
       "From //foo:c2\n"
       "  header: pch2.h\n"
       "  source: //pcs2.cc",
       err.help_text());
 }