Issue #9213 has been updated by Masahiro Kitajima.


副作用の報告です。

## Sample code

### sample.c
<pre>void Init_Sample() {
}</pre>

### extconf.rb
<pre>require "mkmf"
create_makefile("Sample")</pre>
## Operation
<pre>    C:\TMP>ruby extconf.rb
 1: creating Makefile</pre>
<pre>    C:\TMP>nmake /N
 1: 
 2: Microsoft (R) Program Maintenance Utility   Version 6.00.9782.0
 3: Copyright (C) Microsoft Corp 1988-1998. All rights reserved.
 4: 
 5:     echo generating Sample-i386-mswin32.def
 6:      \ruby200\bin\ruby -e "puts 'EXPORTS', 'Init_Sample'"  > Sample-i386-mswin32.def
 7:     echo compiling sample.c
 8:      cl -nologo -I. -Ic:/ruby200/include/ruby-2.0.0/i386-mswin32 -Ic:/ruby200/include/ruby-2.0.0/ruby/backward -Ic:/ruby200/include/ruby-2.0.0 -I.-MD -Zi -W2 -O2b2xg- -G6 -Zm600   -Fosample.obj -c -Tcsample.c
 9:     echo linking shared-object Sample.so
10:     \ruby200\bin\ruby -run -e rm -- -f Sample.so
11:      cl -nologo -LD -FeSample.so sample.obj msvcrt-ruby200.lib  oldnames.lib user32.lib advapi32.lib shell32.lib ws2_32.lib imagehlp.lib shlwapi.lib  -link -incremental:no -debug -opt:ref -opt:icf -incremental:no -debug -opt:ref -opt:icf -dll -libpath:. -libpath:/ruby200/lib  -implib:Sample-i386-mswin32.lib -pdb:Sample-i386-mswin32.pdb -def:Sample-i386-mswin32.def</pre>
6行目と 10行目、$(RUBY) の展開結果にドライブ名が付いていません。


----------------------------------------
Bug #9213: mkmf.rb emits invalid destination directory name for mswin32/64
https://bugs.ruby-lang.org/issues/9213#change-45515

* Author: Akio Tajima
* Status: Closed
* Priority: Normal
* Assignee: 
* Category: lib
* Target version: 2.1.0
* ruby -v: ruby 2.0.0p353 (2013-11-22) [i386-mswin32_100]
* Backport: 1.9.3: UNKNOWN, 2.0.0: DONE
----------------------------------------
The install process of traditional extended library (=non gem) uses extconf.rb for creating Makefile and install the library by (n)make install.
However it does not work correctly because of FileUtil.mkdir met bad directory name as 'c:c:/...'.

This is caused by DESTDIR and prefix combination. 
When one does not specify DESTDIR, rbconfig.rb create it as 'DESTDIR = TOPDIR && TOPDIR[/\A[a-z]:/i] || '' unless defined? DESTDIR' #=> 'C:' or 'D:'.
By the other hand CONFIG['prefix'] is (TOPDIR || DESTDIR + '/usr') so the prefixdir also contains 'c:' or 'd:' ...

The definition for install directories in mkmf.rb is defined as both DESTDIR and CONFIG['prefix'] directory for example '$(DESTDIR)$(vendorarchdir)$(target_prefix)'.
It causes the double drive letter name 'c:c:...'.

While there are some workarounds as using setup.rb or gem, it's harmful forthe testing phase of extended libraries.




-- 
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