Issue #12303 has been updated by Tomoyuki Chikanaga.

Backport changed from 2.1: DONTNEED, 2.2: DONTNEED, 2.3: REQUIRED to 2.1: DONTNEED, 2.2: DONTNEED, 2.3: DONE

ruby_2_3 r54710 merged revision(s) 54657,54660.

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Bug #12303: No rule to make target '.ext/include/i386-cygwin/ruby/config.h', needed by 'main.o' when ./configure TEST_COLORS=skip=43
https://bugs.ruby-lang.org/issues/12303#change-58267

* Author: Takeshi Nishimatsu
* Status: Closed
* Priority: Normal
* Assignee: 
* ruby -v: 2.3.0 and trunk (2.4.0dev)
* Backport: 2.1: DONTNEED, 2.2: DONTNEED, 2.3: DONE
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I could not find any document describing
how to use TEST_COLORS environment variable in Ruby.
I could change the color of messages with `./configure TEST_COLORS=skip=43`
and it finished successfully. However, after that, `make` results in an error.

~~~
$ ./configure TEST_COLORS=skip=43
    :
$ make
    :
gcc version 4.9.3 (GCC)
make: *** No rule to make target '.ext/include/i386-cygwin/ruby/config.h', needed by 'main.o'.  Stop.
$
~~~

I found this problem on Cygwin with gcc, Mac OS X with gcc,
Mac OS X with clang, and Linux with gcc (Ubuntu 14.04).
I found this problem both in ruby-2.3.0 and trunk (2.4.0dev).

I am sorry if I set TEST_COLORS incorrectly.




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