# \[Open\] Can't build Ruby checked out from official GitHub mirror

**URL:** <https://www.ruby-forum.com/t/open-cant-build-ruby-checked-out-from-official-github-mirror/232661>\
**Category:** Development\
**Created:** [October 21, 2014, 9:33am UTC](https://www.ruby-forum.com/t/open-cant-build-ruby-checked-out-from-official-github-mirror/232661 "2014-10-21T09:33:51Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [October 21, 2014, 9:33am UTC](https://www.ruby-forum.com/t/open-cant-build-ruby-checked-out-from-official-github-mirror/232661/1 "2014-10-21T09:33:51Z")

</div>

Issue #10409 has been reported by Masahiro Ide.

* * *

Bug #10409: Can’t build Ruby checked out from official GitHub mirror

> **[Bug #10409: Can't build Ruby checked out from official GitHub mirror - Ruby...](https://bugs.ruby-lang.org/issues/10409)**
>
> Redmine

- Author: Masahiro Ide
- Status: Open
- Priority: Normal
- Assignee:
- Category:
- Target version: current: 2.2.0
- ruby -v: ruby 2.2.0dev (2014-10-21 trunk 48070) [i686-linux]
- Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN

* * *

When I tried to compile official github mirror version of ruby on linux  
system, I get the error:

```auto
$ ./configure
...
checking for broken memmem... no
checking for nroff... /usr/bin/nroff
.ext/include/i686-linux/ruby/config.h updated
ruby library version = 2.2.0
configure: creating ./config.status
config.status: creating GNUmakefile
config.status: creating Makefile
config.status: creating ruby-2.2.pc
Downloading Unicode data files...
ruby: Can't chdir to ../enc/unicode/data (fatal)
make: *** [update-unicode] Error 1

```

This error happens only in the git version because git don’t track emtpy  
directories (“$(srcdir)/enc/unicode/data”).

The following patch may fix this problem.

```auto
diff --git a/common.mk b/common.mk
index 09ce4a8..e41e047 100644
--- a/common.mk
+++ b/common.mk
@@ -1097,6 +1097,7 @@ update-gems: PHONY

 update-unicode: PHONY
   $(ECHO) Downloading Unicode data files...
+ $(Q) $(MAKEDIRS) "$(srcdir)/enc/unicode/data"
   $(Q) $(BASERUBY) -C "$(srcdir)/enc/unicode/data" \
       ../../../tool/downloader.rb -e $(ALWAYS_UPDATE_UNICODE:yes=-a) 
unicode \
       UnicodeData.txt CompositionExclusions.txt NormalizationTest.txt

```