CMake: Link Threads the old-style

furkanusta · furkanusta · commit 44b06d70e8d2 · 2020-04-29T23:47:36.000+03:00
If linked against Threads::Threads target while building static libraries, cmake cannot find the
threads library while trying to use the installed target afterwards
diff --git a/simdjson-flags.cmake b/simdjson-flags.cmake
@@ -73,7 +73,9 @@ endif()
 option(SIMDJSON_ENABLE_THREADS "Enable threaded operation" ON)
 if(SIMDJSON_ENABLE_THREADS)
   find_package(Threads REQUIRED)
-  target_link_libraries(simdjson-flags INTERFACE Threads::Threads)
+  set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
+  set(THREADS_PREFER_PTHREAD_FLAG TRUE)
+  target_link_libraries(simdjson-flags INTERFACE ${CMAKE_THREAD_LIBS_INIT} )
 endif()
 
 option(SIMDJSON_SANITIZE "Sanitize addresses" OFF)
