Let CMake pass -pthread for us.

Change-Id: Iac5278ba5de916aa7a5cb5c97a9103aa7e140562 Reviewed-on: https://code-review.googlesource.com/c/re2/+/58611 Reviewed-by: Paul Wankadia <[email protected]>
google · May 19, 2021 · ae1e294 · ae1e294
1 parent 1d56d78
commit ae1e294
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -47,8 +47,8 @@ if(WIN32)
   add_definitions(-DUNICODE -D_UNICODE -DSTRICT -DNOMINMAX)
   add_definitions(-D_CRT_SECURE_NO_WARNINGS -D_SCL_SECURE_NO_WARNINGS)
 elseif(UNIX)
-  add_compile_options(-pthread)
-  list(APPEND EXTRA_TARGET_LINK_LIBRARIES -pthread)
+  set(THREADS_PREFER_PTHREAD_FLAG ON)
+  find_package(Threads REQUIRED)
 endif()
 
 if(USEPCRE)
@@ -86,6 +86,10 @@ target_include_directories(re2 PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_D
 set_target_properties(re2 PROPERTIES SOVERSION ${SONAME} VERSION ${SONAME}.0.0)
 add_library(re2::re2 ALIAS re2)
 
+if(UNIX)
+  target_link_libraries(re2 PUBLIC Threads::Threads)
+endif()
+
 if(RE2_BUILD_TESTING)
   set(TESTING_SOURCES
       re2/testing/backtrack.cc