build: Improve pthread detection.

ConfigureChecks.cmake

@@ -128,9 +128,9 @@ if (Z_LIBRARY)
 endif (Z_LIBRARY)
 
 if (CMAKE_HAVE_THREADS_LIBRARY)
-    if (CMAKE_HAVE_PTHREADS_CREATE OR CMAKE_HAVE_PTHREAD_CREATE)
+    if (CMAKE_USE_PTHREADS_INIT)
         set(HAVE_PTHREAD 1)
-    endif (CMAKE_HAVE_PTHREADS_CREATE OR CMAKE_HAVE_PTHREAD_CREATE)
+    endif (CMAKE_USE_PTHREADS_INIT)
 endif (CMAKE_HAVE_THREADS_LIBRARY)
 
 # OPTIONS

src/threads/CMakeLists.txt

@@ -31,7 +31,7 @@ set(libssh_threads_SRCS
 )
 
 # build and link pthread
-if (CMAKE_HAVE_PTHREADS_CREATE OR CMAKE_HAVE_PTHREAD_CREATE)
+if (CMAKE_USE_PTHREADS_INIT)
     set(libssh_threads_SRCS
         ${libssh_threads_SRCS}
         pthread.c
@@ -41,7 +41,7 @@ if (CMAKE_HAVE_PTHREADS_CREATE OR CMAKE_HAVE_PTHREAD_CREATE)
         ${LIBSSH_THREADS_LINK_LIBRARIES}
         ${CMAKE_THREAD_LIBS_INIT}
     )
-endif (CMAKE_HAVE_PTHREADS_CREATE OR CMAKE_HAVE_PTHREAD_CREATE)
+endif (CMAKE_USE_PTHREADS_INIT)
 
 set(LIBSSH_THREADS_LINK_LIBRARIES
   ${LIBSSH_THREADS_LINK_LIBRARIES}