Issue #13966 has been updated by kernigh (George Koehler).


The file ext/rbconfig/sizeof/depend should contain the string "configure.ac", not "configure.in". This was changed by git commit 3133a5c (svn r60062). I wonder if your copy of that file is too old?


----------------------------------------
Bug #13966: configure.in still needed ?!
https://bugs.ruby-lang.org/issues/13966#change-67108

* Author: duerst (Martin Drst)
* Status: Open
* Priority: Normal
* Assignee: nobu (Nobuyoshi Nakada)
* Target version: 
* ruby -v: ruby 2.5.0dev (2017-09-28 trunk 60054) [x86_64-cygwin]
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN
----------------------------------------
When compiling trunk on cygwin, I get the following error:

```
make[2]: Entering directory '/cygdrive/c/Data/ruby/ext/rbconfig/sizeof'
make[2]: *** No rule to make target '../../.././configure.in', needed by 'sizes.c'.  Stop.
make[2]: Leaving directory '/cygdrive/c/Data/ruby/ext/rbconfig/sizeof'
make[1]: *** [exts.mk:256: ext/rbconfig/sizeof/all] Error 2
make[1]: Leaving directory '/cygdrive/c/Data/ruby'
make: *** [uncommon.mk:236: build-ext] Error 2
```

(Only showing the last few lines, up to that point, everything seems to run smoothly.)

It looks like something somewhere still wants configure.in, although we now use configure.ac.



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