# Copyright 2018 the V8 project authors. All rights reserved.# Use of this source code is governed by a BSD-style license that can be# found in the LICENSE file.# Variable default definitions. Override them by exporting them in your shell.V8_DIR?=$(realpath$(dir$(lastword $(MAKEFILE_LIST)))/..)# Support for the GNU GLOBAL Source Code Tag System.$(V8_DIR)/gtags.files:$(wildcard $(addprefix $(V8_DIR)/,$(shell cat $(V8_DIR)/gtags.files 2> /dev/null)))@(cd$(V8_DIR)&& find include src test-name'*.h'-o-name'*.cc'-o-name'*.c')>$@# We need to manually set the stack limit here, to work around bugs in# gmake-3.81 and global-5.7.1 on recent 64-bit Linux systems.# Using $(wildcard ...) gracefully ignores non-existing files, so that stale# gtags.files after switching branches don't cause recipe failures.$(V8_DIR)/GPATH $(V8_DIR)/GRTAGS $(V8_DIR)/GSYMS $(V8_DIR)/GTAGS:$(V8_DIR)/gtags.files $(wildcard $(addprefix $(V8_DIR)/,$(shell cat $(V8_DIR)/gtags.files 2> /dev/null)))@cd$(V8_DIR)&& bash -c'ulimit -s 10240 && GTAGSFORCECPP=yes gtags -i -q -f $<'$(V8_DIR)/tags:$(V8_DIR)/gtags.files $(wildcard $(addprefix $(V8_DIR)/,$(shell cat $(V8_DIR)/gtags.files 2> /dev/null)))@(ctags --version | grep'Exuberant Ctags'>/dev/null)||\(echo"Please install Exuberant Ctags (check 'ctags --version')">&2;false)@cd$(V8_DIR)&& ctags --fields=+l -L gtags.filestags:$(V8_DIR)/tagstags.clean:@rm-f$(addprefix $(V8_DIR), gtags.files GPATH GRTAGS GSYMS GTAGS tags)clean:tags.clean