Issue #15012 has been updated by junaruga (Jun Aruga).


I just noticed the environment variables line for gcc-8 test case on `.travis.yml` are removed by the great hack in `configure.ac`.

That's amazing!
Thank you for the improvement.

https://github.com/ruby/ruby/commit/f677ba8

```
$ git show f677ba887158758c48b4f8e1df092c6aacfe6621
...
-      env:
-        - CC=gcc-8 AR=gcc-ar-8 NM=gcc-nm-8 RANLIB=gcc-ranlib-8
...
```


----------------------------------------
Misc #15012: Testing on latest version gcc on Travis CI
https://bugs.ruby-lang.org/issues/15012#change-74058

* Author: jaruga (Jun Aruga)
* Status: Open
* Priority: Normal
* Assignee: 
----------------------------------------
Ruby's Travis CI [1] is running on gcc 4.8.4 as the default behavior of Travis gcc setting.
Right now gcc's latest version is 8.
Though it is important to test on the old version gcc-4.8, also it is meaningful to test on the latest version gcc, knowing we have RubyCI. [2]

The benefit to run on gcc-8 is
* We can care the issue on the latest version of gcc easier, such as visualizing the build warnings on the log.
* We can show contributors or developers how ruby could be built on the latest version gcc.

I sent the pull-request [3] to show the code as a proposal.

[1] https://travis-ci.org/ruby/ruby
[2] https://rubyci.org/
[3] https://github.com/ruby/ruby/pull/1937




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