File cmark.patch of Package swift-lang

diff --git cmark.orig/CMakeLists.txt cmark/CMakeLists.txt
index 23eca3c5..beba0702 100755
--- cmark.orig/CMakeLists.txt
+++ cmark/CMakeLists.txt
@@ -22,6 +22,8 @@ set(CMAKE_VISIBILITY_INLINES_HIDDEN TRUE)
 
 set(CMAKE_INCLUDE_CURRENT_DIR YES)
 
+set(CMAKE_POSITION_INDEPENDENT_CODE YES)
+
 option(CMARK_FUZZ_QUADRATIC "Build quadratic fuzzing harness" OFF)
 option(CMARK_LIB_FUZZER "Build libFuzzer fuzzing harness" OFF)
 option(CMARK_THREADING "Add locks around static accesses" OFF)