uclibc: only strip libpthread on 0.9.28.3 / not PTHREAD_DEBUG

toolchain/uClibc/uclibc.mk

@@ -524,7 +524,11 @@ $(TARGET_DIR)/lib/libc.so.0: $(STAGING_DIR)/usr/lib/libc.a
 		DEVEL_PREFIX=/usr/ \
 		RUNTIME_PREFIX=/ \
 		install_runtime
-	$(STRIPCMD) $(@D)/lib*.so*
+ifeq ($(BR2_UCLIBC_VERSION_0_9_28_3),y)
+ifneq ($(BR2_PTHREAD_DEBUG),y)
+	-$(STRIPCMD) $(STRIP_STRIP_UNNEEDED) $(@D)/libpthread*.so*
+endif
+endif
 	touch -c $@
 
 $(TARGET_DIR)/usr/bin/ldd: $(cross_compiler)