cmake: Make sure we check some functions on all platforms.

ConfigureChecks.cmake

@@ -101,6 +101,9 @@ endif (NOT WITH_GCRYPT)
 check_function_exists(strncpy HAVE_STRNCPY)
 check_function_exists(vsnprintf HAVE_VSNPRINTF)
 check_function_exists(snprintf HAVE_SNPRINTF)
+check_function_exists(poll HAVE_POLL)
+check_function_exists(select HAVE_SELECT)
+check_function_exists(getaddrinfo HAVE_GETADDRINFO)
 
 if (WIN32)
     check_function_exists(_strtoui64 HAVE__STRTOUI64)
@@ -135,12 +138,7 @@ if (UNIX)
     endif (HAVE_LIBRT OR HAVE_CLOCK_GETTIME)
 
     check_library_exists(util forkpty "" HAVE_LIBUTIL)
-    check_function_exists(getaddrinfo HAVE_GETADDRINFO)
-    check_function_exists(poll HAVE_POLL)
-    check_function_exists(select HAVE_SELECT)
     check_function_exists(cfmakeraw HAVE_CFMAKERAW)
-    check_function_exists(ntohll HAVE_NTOHLL)
-    check_function_exists(htonll HAVE_HTONLL)
     check_function_exists(strtoull HAVE_STRTOULL)
     check_function_exists(__strtoull HAVE___STRTOULL)
 endif (UNIX)