源自github用户backyes:
@reyoung suggest using QUIET for looking for swig. Just follow his comment.

源自github用户reyoung:
Why should this PR be a bug?

We handcraft the find swig method, before. And using find(SWIG 3.0) just update the swig version from 2.X to 3.0. So, there are two things I am confused.

• find(SWIG 3.0) should be as same as we set set(MIN_SWIG_VERSION 2) to set(MIN_SWIG_VERSION 3). Am I right for this?
• Is the Paddle using some swig 3.0 feature that cause swig 2.x cannot be used?

源自github用户backyes:
有个用户场景下， 在make阶段出现了一些关于swig的异常具，具体的错误并没有记录。另外， 既然cmake有swig的find_package，且能对版本控制，建议改成patch后的形式。
感觉没有必要对这些影响不大的问题，反复确认。

源自github用户reyoung:
@backyes I approve using the find(SWIG). I just want to know, why you upgrade the swig 2.x to 3.0? Is there any bug before? Could you provide more details for this bug?

源自github用户reyoung:
@backyes Upgrade the dependency version will cause we lack of support some old linux distro. Like CentOS 7, CentOS 6.X. I just need to ensure these linux distro support SWIG 3.0 if you upgrade SWIG version.

It is important for us.

源自github用户backyes:
OK

源自github用户reyoung:
@QiJune The default swig in CentOS 7.0, is swig 2.0. Is there any trouble when you build RPM package in CentOS 7 by using swig 2.0 ?

源自github用户backyes:
@reyoung Swig 2.0 can satisfy current requirement, so use find_package(SWIG 2.0) instead.

Also rename swig.cmake->py_paddle instead, since swig.cmake will own nothing about SWIG tool except py_paddle related function.

源自github用户reyoung:
@backyes Actually, swig.cmake should not be renamed. Because in general, the swig part of paddle, will not just support only python, but many other language, see #258:paddle.trainer .config_parser

源自github用户backyes:
@reyoung I agree with you.

源自github用户reyoung:
@backyes Sorry, the cmake support for RDMA PR has been check in, then make this PR conflict to develop branch. Please resolve the conflicts, and tell me to merge.

源自github用户backyes:
@reyoung conflict is removed now.

源自github用户coveralls:

Coverage decreased (-0.005%) to 62.35% when pulling 80369e22747f78539f396a7fb402d438c76cdd0a on backyes:bugfix_swig into 744dba4abdedd74504c613d408221c075acc8cb9 on baidu:develop.