From 852f341615808b6a5e6249b3b7c1f5f20fd22ec9 Mon Sep 17 00:00:00 2001
From: Yi Wang <yi.wang.2005@gmail.com>
Date: Fri, 25 Aug 2017 16:48:52 -0700
Subject: [PATCH] Add clean build section

---
 doc/howto/dev/build_cn.md | 10 +++++++++-
 doc/howto/dev/build_en.md | 10 +++++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/doc/howto/dev/build_cn.md b/doc/howto/dev/build_cn.md
index 79b4ff9d5..d9d520893 100644
--- a/doc/howto/dev/build_cn.md
+++ b/doc/howto/dev/build_cn.md
@@ -56,7 +56,15 @@
    有时候我们只想运行一个特定的单元测试，比如 `memory_test`，我们可以
 
    ```bash
-   docker run -v $PWD:/paddle paddle:dev bash -c "cd /paddle/build; ctest -V -R memory_test"
+   nvidia-docker run -v $PWD:/paddle paddle:dev bash -c "cd /paddle/build; ctest -V -R memory_test"
+   ```
+
+5. 清理
+
+   有时候我们会希望清理掉已经下载的第三方依赖以及已经编译的二进制文件。此时只需要：
+
+   ```bash
+   rm -rf build
    ```
 
 ## 为什么要 Docker 呀？
diff --git a/doc/howto/dev/build_en.md b/doc/howto/dev/build_en.md
index e1b55929f..318bf3d38 100644
--- a/doc/howto/dev/build_en.md
+++ b/doc/howto/dev/build_en.md
@@ -56,7 +56,15 @@ Nothing else.  Not even Python and GCC, because you can install all build tools
    Sometimes we want to run a specific unit test, say `memory_test`, we can run
 
    ```bash
-   docker run -v $PWD:/paddle paddle:dev bash -c "cd /paddle/build; ctest -V -R memory_test"
+   nvidia-docker run -v $PWD:/paddle paddle:dev bash -c "cd /paddle/build; ctest -V -R memory_test"
+   ```
+
+5. Clean Build.
+
+   Sometimes, we might want to clean all thirt-party dependents and built binaries.  To do so, just
+
+   ```bash
+   rm -rf build
    ```
 
 ## Docker, Or Not?
-- 
GitLab