Simplified threads configuration.

lang/python/Makefile

@@ -32,14 +32,16 @@ PYTHON_NO_DEPENDS=	yes
 # If you don't want to use Python's thread module, you need to set
 # WITHOUT_THREADS.
 #
-LIBC_R!=	/sbin/ldconfig -r | grep c_r || true
-.if (${LIBC_R} != "") && !defined(WITHOUT_THREADS)
+.if !defined(WITHOUT_THREADS)
 CONFIGURE_ARGS+=	--with-threads
 CFLAGS+=		${PTHREAD_CFLAGS}
 CONFIGURE_ENV+=		LDFLAGS="${PTHREAD_LIBS} ${LDFLAGS}"
 .else
 CONFIGURE_ARGS+=	--without-threads
-.endif
+.if defined(LDFLAGS)
+CONFIGURE_ENV+=		LDFLAGS="${LDFLAGS}"
+.endif # defined(LDFLAGS)
+.endif # !defined(WITHOUT_THREADS)
 
 DEMODIR=	${PREFIX}/share/examples/${PYTHON_VERSION}