用以前同事的一句话说，就是：chrome大神们飞起来了。
为啥这么说呢，查看下chromium的发行版本就知道。今年chromium发行了N多版本。PS：我今年3月份下载chromium34代码，现在更新到40了都（具体不是很清楚）。明年据说要41-47（具体记不住了），总之啊，chromium的发行版本愈加的频繁和活跃。
今天下载了chromium39.0.2132.2代码，接着需要把之前的工作移植上去。在下载（gclient runhooks期间）和执行ninja -C out/Release content_shell_apk的时候，遇到几个问题，之前是没遇到的，现在记录下来，供大家分享。
1. 问题：
Package xtst was not found in the pkg-config search path.
Perhaps you should add the directory containing `xtst.pc‘
to the PKG_CONFIG_PATH environment variable No package ‘xtst‘ found
gyp: Call to ‘pkg-config --cflags xtst‘ returned exit status 1.
解决方式: sudo apt-get install libxtst-dev
2. 问题：
Package libexif was not found in the pkg-config search path.
Perhaps you should add the directory containing `libexif.pc‘
to the PKG_CONFIG_PATH environment variable
No package ‘libexif‘ found
gyp: Call to ‘pkg-config --cflags libexif‘ returned exit status 1.
ans: sudo apt-get install libexif-dev
3. 问题：
Updating projects from gyp files...
Package xscrnsaver was not found in the pkg-config search path.
Perhaps you should add the directory containing `xscrnsaver.pc‘
to the PKG_CONFIG_PATH environment variable
No package ‘xscrnsaver‘ found
gyp: Call to ‘pkg-config --cflags xscrnsaver‘ returned exit status 1.
ans : sudo apt-get install libxss-dev libxdg-basedir-dev libxinerama-dev libxft-dev libcairo2-dev libdbusmenu-glib-dev
另：我在执行上面命令之前，现将sudo apt-get install
xscrnsaver(tab提示键下所有库)都安装了
4.问题：
ninja: error: unknown target ‘content_shell_apk‘, did you mean ‘content_shell_pak‘?
解决方式：Google提供：
To set the OS=android gyp define:
* If you use different checkouts for android and non-android work, use a chromium.gyp_env in each of your chromium/android checkouts (https://code.google.com/p/chromium/wiki/CommonBuildTasks#chromium.gyp_env):
# Assuming your PWD is in “src”:
echo "{ ‘GYP_DEFINES‘: ‘OS=android‘, }" > ../chromium.gyp_env
* If you never build chromium for platforms other than android, you can alternatively set the GYP_DEFINES environment variable globally in your ~/.bashrc:
echo ‘GYP_DEFINES="OS=android $GYP_DEFINES"‘ >> ~/.bashrc
* If you use the same checkout for android and non-android work, manually set GYP_DEFINES to the right value before you run gyp
GYP_DEFINES=OS=android gclient runhooks
PS: 有时间的孩纸们，赶紧看看chromiumOS吧，预测要火，而且是大火！