[Skiboot] [PATCH] add a build directory test

[Stewart Smith]

Cedric Le Goater <clg at fr.ibm.com> writes:
>>>> --- skiboot.git.orig/test/Makefile.check
>>>> +++ skiboot.git/test/Makefile.check
>>>> @@ -2,3 +2,7 @@ check: boot-check
>>>>
>>>>  boot-check: skiboot.lid
>>>>  	./test/run_boot_test.sh
>>>> +
>>>> +build-check:
>>>> +	rm -rf buildtest && mkdir buildtest
>>>> +	make SRC=$(PWD) -f ../Makefile -C buildtest
>>>
>>> Could you instead add to .travis.yaml so that it's just built by
>>> travis-ci ?
>> 
>> Sure. I will give it a try also.
>
> Is that what you want ? I tested it on travis.

I ended up merging something a bit different, but does the same thing:

commit bf2e63da39bf8e2cf8dabe326d18f03016dda774
Author: Stewart Smith <stewart at linux.vnet.ibm.com>
Date:   Fri Aug 14 16:35:24 2015 +1000

    travis-ci: test building out of tree
    
    Signed-off-by: Stewart Smith <stewart at linux.vnet.ibm.com>

diff --git a/.travis.yml b/.travis.yml
index 4361bba..908b2055 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,3 +19,4 @@ env:
 script:
     - make && make check
     - make clean && SKIBOOT_GCOV=1 make && SKIBOOT_GCOV=1 make check
+    - make clean && rm -rf builddir && mkdir builddir && make SRC=`pwd` -f ../Makefile -C builddir