GN: Complete static libs can't depend on static libs

tools/gn/variables.cc

Index: tools/gn/variables.cc
diff --git a/tools/gn/variables.cc b/tools/gn/variables.cc
index 75172ecf4c64e445d4fa7e778fff204a7fade31a..de214efdad102a63f50be4d039333ec8ac365b22 100644
--- a/tools/gn/variables.cc
+++ b/tools/gn/variables.cc
@@ -375,7 +375,7 @@ const char kCompleteStaticLib_Help[] =
     "complete_static_lib: [boolean] Links all deps into a static library.\n"
     "\n"
     "  A static library normally doesn't include code from dependencies, but\n"
-    "  instead forward the static libraries and source sets in its deps up\n"
+    "  instead forwards the static libraries and source sets in its deps up\n"
     "  the dependency chain until a linkable target (an executable or shared\n"
     "  library) is reached. The final linkable target only links each static\n"
     "  library once, even if it appears more than once in its dependency\n"
@@ -384,7 +384,10 @@ const char kCompleteStaticLib_Help[] =
     "  In some cases the static library might be the final desired output.\n"
     "  For example, you may be producing a static library for distribution to\n"
     "  third parties. In this case, the static library should include code\n"
-    "  for all dependencies in one complete package.\n"
+    "  for all dependencies in one complete package. Since GN does not unpack\n"
+    "  static libraries to forward their contents up the dependency chain,\n"
+    "  it is an error for complete static libraries to depend on other static\n"
+    "  libraries.\n"
     "\n"
     "Example\n"
     "\n"