From 2c877bb9df11cf14b8f2d275c79f40ab9ed8846a Mon Sep 17 00:00:00 2001
From: Benjamin Altieri <benaltieri@gmail.com>
Date: Wed, 26 Jun 2019 12:42:02 -0700
Subject: [PATCH] Add subproject guard for code coverage all targets

---
 CodeCoverage.cmake | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/CodeCoverage.cmake b/CodeCoverage.cmake
index 55559f0..5e4501b 100644
--- a/CodeCoverage.cmake
+++ b/CodeCoverage.cmake
@@ -383,7 +383,17 @@ function(add_code_coverage_all_targets)
                         "${multi_value_keywords}"
                         ${ARGN})
 
-  if(CODE_COVERAGE)
+  if(${PROJECT_NAME} STREQUAL ${CMAKE_PROJECT_NAME})
+      # This is the top level project, ie the CMakeLists.txt which cmake was run
+      # on directly, not a submodule/subproject. We can do some special things now.
+      # The option to enable code coverage will be enabled by default only for
+      # top level projects.
+      set(TOP_LEVEL_PROJECT ON)
+  else()
+      set(TOP_LEVEL_PROJECT OFF)
+  endif()
+
+  if(CODE_COVERAGE AND TOP_LEVEL_PROJECT)
     if("${CMAKE_C_COMPILER_ID}" MATCHES "(Apple)?[Cc]lang"
        OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "(Apple)?[Cc]lang")
       # Targets