Replace CMake threads variable with modern target

Author: elmindreda

CMakeLists.txt

@@ -199,7 +199,7 @@ if (_GLFW_X11)
 
     # Set up library and include paths
     list(APPEND glfw_INCLUDE_DIRS "${X11_X11_INCLUDE_PATH}")
-    list(APPEND glfw_LIBRARIES "${X11_X11_LIB}" "${CMAKE_THREAD_LIBS_INIT}")
+    list(APPEND glfw_LIBRARIES "${X11_X11_LIB}")
 
     # Check for XRandR (modern resolution switching and gamma control)
     if (NOT X11_Xrandr_INCLUDE_PATH)
@@ -241,7 +241,7 @@ if (_GLFW_WAYLAND)
     list(APPEND glfw_PKG_DEPS "wayland-egl")
 
     list(APPEND glfw_INCLUDE_DIRS "${Wayland_INCLUDE_DIRS}")
-    list(APPEND glfw_LIBRARIES "${Wayland_LIBRARIES}" "${CMAKE_THREAD_LIBS_INIT}")
+    list(APPEND glfw_LIBRARIES "${Wayland_LIBRARIES}")
 
     find_package(XKBCommon REQUIRED)
     list(APPEND glfw_INCLUDE_DIRS "${XKBCOMMON_INCLUDE_DIRS}")
@@ -265,7 +265,6 @@ endif()
 #--------------------------------------------------------------------
 if (_GLFW_OSMESA)
     find_package(OSMesa REQUIRED)
-    list(APPEND glfw_LIBRARIES "${CMAKE_THREAD_LIBS_INIT}")
 endif()
 
 #--------------------------------------------------------------------

examples/CMakeLists.txt

@@ -34,7 +34,7 @@ add_executable(splitview WIN32 MACOSX_BUNDLE splitview.c ${ICON} ${GLAD_GL})
 add_executable(triangle-opengl WIN32 MACOSX_BUNDLE triangle-opengl.c ${ICON} ${GLAD_GL})
 add_executable(wave WIN32 MACOSX_BUNDLE wave.c ${ICON} ${GLAD_GL})
 
-target_link_libraries(particles "${CMAKE_THREAD_LIBS_INIT}")
+target_link_libraries(particles Threads::Threads)
 if (RT_LIBRARY)
     target_link_libraries(particles "${RT_LIBRARY}")
 endif()

src/CMakeLists.txt

@@ -95,7 +95,7 @@ target_include_directories(glfw PRIVATE
                            "${GLFW_SOURCE_DIR}/src"
                            "${GLFW_BINARY_DIR}/src"
                            ${glfw_INCLUDE_DIRS})
-target_link_libraries(glfw PRIVATE ${glfw_LIBRARIES})
+target_link_libraries(glfw PRIVATE Threads::Threads ${glfw_LIBRARIES})
 
 if (APPLE)
     # For some reason CMake didn't know about .m until version 3.16

tests/CMakeLists.txt

@@ -42,8 +42,8 @@ add_executable(title WIN32 MACOSX_BUNDLE title.c ${GLAD_GL})
 add_executable(triangle-vulkan WIN32 triangle-vulkan.c ${GLAD_VULKAN})
 add_executable(windows WIN32 MACOSX_BUNDLE windows.c ${GLAD_GL})
 
-target_link_libraries(empty "${CMAKE_THREAD_LIBS_INIT}")
-target_link_libraries(threads "${CMAKE_THREAD_LIBS_INIT}")
+target_link_libraries(empty Threads::Threads)
+target_link_libraries(threads Threads::Threads)
 if (RT_LIBRARY)
     target_link_libraries(empty "${RT_LIBRARY}")
     target_link_libraries(threads "${RT_LIBRARY}")