CMake: Always add pthread flags into CMAKE_REQUIRED_LIBRARIES

It was weird to add CMAKE_THREAD_LIBS_INIT in CMAKE_REQUIRED_LIBRARIES
only if CLOCK_MONOTONIC is available. Alternative would be to remove
the thread libs from CMAKE_REQUIRED_LIBRARIES after the check for
pthread_condattr_setclock() but keeping the libs should be fine too.
Then it's ready in case more pthread functions were wanted some day.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9db8cb81f3e7a802b589d552dec4ff4520821362..011aa1999162d33dc62e22bc82a00ffab1dae5fa 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -645,11 +645,13 @@ if(XZ_THREADS)
             target_link_libraries(liblzma PRIVATE Threads::Threads)
             add_compile_definitions(MYTHREAD_POSIX)
 
+            # Make the thread libs available in later checks. In practice
+            # only pthread_condattr_setclock check should need this.
+            list(INSERT CMAKE_REQUIRED_LIBRARIES 0 "${CMAKE_THREAD_LIBS_INIT}")
+
             # Check if pthread_condattr_setclock() exists to
             # use CLOCK_MONOTONIC.
             if(HAVE_CLOCK_MONOTONIC)
-                list(INSERT CMAKE_REQUIRED_LIBRARIES 0
-                     "${CMAKE_THREAD_LIBS_INIT}")
                 check_symbol_exists(pthread_condattr_setclock pthread.h
                                     HAVE_PTHREAD_CONDATTR_SETCLOCK)
                 tuklib_add_definition_if(ALL HAVE_PTHREAD_CONDATTR_SETCLOCK)