1 files changed, 27 insertions, 10 deletions
diff --git a/third_party/third_party.gni b/third_party/third_party.gni
index 7aaf63586f..384eeed580 100644
--- a/third_party/third_party.gni
+++ b/third_party/third_party.gni
@@ -4,21 +4,38 @@
 # found in the LICENSE file.
 
 template("third_party") {
+  enabled = !defined(invoker.enabled) || invoker.enabled
   config(target_name + "_public") {
-    if (defined(invoker.public_defines)) {
-      defines = invoker.public_defines
+    if (enabled) {
+      cflags = []
+      if (defined(invoker.public_defines)) {
+        defines = invoker.public_defines
+      }
+      if (is_win) {
+        include_dirs = invoker.public_include_dirs
+      } else {
+        foreach(dir, invoker.public_include_dirs) {
+          cflags += [
+            "-isystem",
+            rebase_path(dir),
+          ]
+        }
+      }
+    } else {
+      not_needed(invoker, "*")
     }
-    include_dirs = invoker.public_include_dirs
   }
   source_set(target_name) {
-    forward_variables_from(invoker, "*", [ "public_include_dirs" ])
-    public_configs = [ ":" + target_name + "_public" ]
+    if (enabled) {
+      forward_variables_from(invoker, "*", [ "public_include_dirs" ])
+      public_configs = [ ":" + target_name + "_public" ]
 
-    # Warnings are just noise if we're not maintaining the code.
-    if (is_win) {
-      cflags = [ "/w" ]
-    } else {
-      cflags = [ "-w" ]
+      # Warnings are just noise if we're not maintaining the code.
+      if (is_win) {
+        cflags = [ "/w" ]
+      } else {
+        cflags = [ "-w" ]
+      }
     }
   }
 }