Add `getservbyname_r` prototype detection to CMake

OpenBSD's prototype is differ than glibc's one, but it is declared.

Signed-off-by: OBATA Akio <obache@wizdas.com>
(cherry picked from commit 6886dd7e96)

CMakeLists.txt

@@ -391,6 +391,7 @@ check_function_exists( getpeername HAVE_GETPEERNAME )
 check_function_exists( getprotobyname_r HAVE_GETPROTOBYNAME_R )
 check_function_exists( getpt HAVE_GETPT )
 check_function_exists( getservbyname_r HAVE_GETSERVBYNAME_R )
+check_symbol_exists( getservbyname_r "netdb.h" HAVE_DECL_GETSERVBYNAME_R )
 check_function_exists( getservbyport_r HAVE_GETSERVBYPORT_R )
 check_function_exists( getsockname HAVE_GETSOCKNAME )
 check_function_exists( getsockopt HAVE_GETSOCKOPT )

config.h.cmake

@@ -159,7 +159,7 @@
 #cmakedefine HAVE_CUPS_1_6 1
 
 /* Define to 1 if you have the declaration of `getservbyname_r', and to 0 if you don't. */
-#undef HAVE_DECL_GETSERVBYNAME_R
+#cmakedefine01 HAVE_DECL_GETSERVBYNAME_R
 
 /* Define to 1 if you have the <dirent.h> header file, and it defines `DIR'. */
 #cmakedefine HAVE_DIRENT_H 1

tdecore/network/kresolver_p.h

@@ -48,7 +48,6 @@ extern TQMutex getXXbyYYmutex;
 #endif
 
 /* some systems have the functions, but don't declare them */
-#ifndef __OpenBSD__
 #if defined(HAVE_GETSERVBYNAME_R) && !HAVE_DECL_GETSERVBYNAME_R
 extern "C" {
   struct servent;
@@ -70,7 +69,6 @@ extern "C" {
 				struct protoent** result);
 }
 #endif
-#endif
 
 /* decide whether res_init is thread-safe or not */
 #if defined(__GLIBC__)