build: HAVE_LIBPTHREAD, HAVE_PTHREAD(S) => HAVE_PTHREAD

cmake/OpenCVFindLibsPerf.cmake

@@ -125,16 +125,9 @@ if(WITH_OPENMP)
   set(HAVE_OPENMP "${OPENMP_FOUND}")
 endif()
 
-if(NOT MSVC AND NOT DEFINED HAVE_PTHREADS)
-  set(_fname "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/pthread_test.cpp")
-  file(WRITE "${_fname}" "#include <pthread.h>\nint main() { (void)pthread_self(); return 0; }\n")
-  try_compile(HAVE_PTHREADS "${CMAKE_BINARY_DIR}" "${_fname}")
-  file(REMOVE "${_fname}")
-endif()
-
 ocv_clear_vars(HAVE_PTHREADS_PF)
-if(WITH_PTHREADS_PF)
-  set(HAVE_PTHREADS_PF ${HAVE_PTHREADS})
+if(WITH_PTHREADS_PF AND HAVE_PTHREAD)
+  set(HAVE_PTHREADS_PF 1)
 else()
   set(HAVE_PTHREADS_PF 0)
 endif()

cmake/templates/cvconfig.h.in

@@ -154,7 +154,7 @@
 #cmakedefine HAVE_PNG
 
 /* Posix threads (pthreads) */
-#cmakedefine HAVE_PTHREADS
+#cmakedefine HAVE_PTHREAD
 
 /* parallel_for with pthreads */
 #cmakedefine HAVE_PTHREADS_PF