Build fix: Check if pthread_setname_np() is available.

configure.ac

@@ -52,6 +52,9 @@ AD_INIT_ASCIIDOC([icinga], [docs])
 
 AM_MISSING_PROG(HELP2MAN, help2man, $missing_dir)
 
+CFLAGS="$CFLAGS -D_GNU_SOURCE -pthread"
+CXXFLAGS="$CXXFLAGS -D_GNU_SOURCE -pthread"
+
 AC_PROG_INSTALL
 AC_PROG_LEX
 AC_PROG_YACC
@@ -71,7 +74,7 @@ AC_CHECK_LIB(m, floor)
 AC_CHECK_LIB(socket, getsockname)
 AC_CHECK_LIB(ws2_32, getsockname)
 AC_CHECK_LIB(shlwapi, PathRemoveFileSpecA)
-AC_CHECK_FUNCS([backtrace_symbols execvpe pipe2])
+AC_CHECK_FUNCS([backtrace_symbols execvpe pipe2 pthread_set_name_np pthread_setname_np])
 
 CFLAGS="$CFLAGS -Wall -Wextra"
 CXXFLAGS="$CXXFLAGS -Wall -Wextra"

lib/base/utility.cpp

@@ -525,14 +525,18 @@ void Utility::SetThreadName(const String& name, bool os)
 	WindowsSetThreadName(name.CStr());
 #endif /* _WIN32 */
 
+#ifdef HAVE_PTHREAD_SET_NAME_NP
+	pthread_set_name_np(pthread_self(), name.CStr());
+#endif /* HAVE_PTHREAD_SET_NAME_NP */
+
+#ifdef HAVE_PTHREAD_SETNAME_NP
 #	ifdef __APPLE__
 	pthread_setname_np(name.CStr());
-#endif /* __APPLE__ */
-
-#ifdef __linux__
+#	else /* __APPLE__ */
 	String tname = name.SubStr(0, 15);
 	pthread_setname_np(pthread_self(), tname.CStr());
-#endif /* __linux__ */
+#	endif /* __APPLE__ */
+#endif /* HAVE_PTHREAD_SETNAME_NP */
 }
 
 String Utility::GetThreadName(void)