CMake: Set ZSTD_SOURCE_DIR from CMAKE_CURRENT_SOURCE_DIR

Instead of CMAKE_SOURCE_DIR, which is not correct when embedding Zstd
within a larger project.

diff --git a/build/cmake/CMakeLists.txt b/build/cmake/CMakeLists.txt
index bf68908186c3439c432dc356cc9f5b8d19bed427..0aa7b30727ef335551c7f93747a1360d36d16bdc 100644 (file)
--- a/build/cmake/CMakeLists.txt
+++ b/build/cmake/CMakeLists.txt
@@ -9,7 +9,7 @@
 
 PROJECT(zstd)
 CMAKE_MINIMUM_REQUIRED(VERSION 2.8.9)
-SET(ZSTD_SOURCE_DIR "${CMAKE_SOURCE_DIR}/../..")
+SET(ZSTD_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../..")
 
 #-----------------------------------------------------------------------------
 # Add extra compilation flags