Compare to CMAKE_CURRENT_SOURCE_DIR for main project check

ea759d03 · Martin Stump · 79050888 · ea759d03
Unverified Commit ea759d03 authored Dec 13, 2020 by Martin Stump
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CMakeLists.txt CMakeLists.txt +2 -1

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--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,9 +8,10 @@ project(nlohmann_json VERSION 3.9.1 LANGUAGES CXX)
 ##
 ## MAIN_PROJECT CHECK
+## determine if nlohmann_json is built as a subproject (using add_subdirectory) or if it is the main project
 ##
 set(MAIN_PROJECT OFF)
-if (CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR)
+if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
  set(MAIN_PROJECT ON)
 endif()