Add the concept of a source set to GN.

A source set acts like a static library in most cases, but doesn't actually make the library. The object files will be added to targets that depend on it.

I changed the default component mode to be a "source set" rather than a shared library in non-component mode.

This fixes the script target writer unit test on Windows.

BUG=
R=scottmg@chromium.org

Review URL: https://codereview.chromium.org/26267003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227596 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 17 insertions, 1 deletions

diff --git a/tools/gn/secondary/build/config/BUILDCONFIG.gn b/tools/gn/secondary/build/config/BUILDCONFIG.gn
index e48f896..d2e609d 100644
--- a/tools/gn/secondary/build/config/BUILDCONFIG.gn
+++ b/tools/gn/secondary/build/config/BUILDCONFIG.gn
@@ -162,7 +162,7 @@ set_sources_assignment_filter(sources_assignment_filter)
 if (is_component_build) {
   component_mode = "shared_library"
 } else {
-  component_mode = "static_library"
+  component_mode = "source_set"
 }
 
 toolkit_uses_gtk = is_linux
@@ -266,6 +266,10 @@ set_defaults("shared_library") {
   }
 }
 
+set_defaults("source_set") {
+  configs = native_compiler_configs
+}
+
 # ==============================================================================
 # TOOLCHAIN SETUP
 # ==============================================================================
diff --git a/tools/gn/secondary/build/toolchain/nacl/BUILD.gn b/tools/gn/secondary/build/toolchain/nacl/BUILD.gn
index 2e2fc7f..b5fe248 100644
--- a/tools/gn/secondary/build/toolchain/nacl/BUILD.gn
+++ b/tools/gn/secondary/build/toolchain/nacl/BUILD.gn
@@ -38,6 +38,18 @@ toolchain("x86_newlib") {
     #pool = "link_pool"
   }
 
+  if (is_win) {
+    tool("stamp") {
+      command = "$python_path gyp-win-tool stamp \$out"
+      description = "STAMP \$out"
+    }
+  } else {
+    tool("stamp") {
+      command = "touch \$out"
+      description = "STAMP \$out"
+    }
+  }
+
   toolchain_args() {
     is_nacl = true