CMake: Build unity as library

CMakeLists.txt

@@ -1,6 +1,8 @@
 set(CMAKE_LEGACY_CYGWIN_WIN32 0)
 cmake_minimum_required(VERSION 2.8)
 
+subdirs(tests)
+
 include(GNUInstallDirs)
 
 project(cJSON C)

tests/CMakeLists.txt

@@ -0,0 +1 @@
+add_library(unity unity/src/unity.c)