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Date:	Thu, 18 Nov 2010 01:10:27 +0900 (JST)
From:	neomjp <neomjp AT yahoo DOT co DOT jp>
Subject:	Re: CYGWIN_NT-6.1-WOW64: Unable to install rubies with rvm
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Hi, Jon,

	I am using cygwin-1.7 on XP Professinal SP 3 and I do not
use rvm, so things may be a little bit different from yours. But
here are some information I know about ruby on cygwin.

On 2010/11/17 3:11, Jon Seidel CMC wrote:
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3DVersion 1.8.7 installation attempt

> [2010-11-16 09:37:58] make
> eval.c:211: error: conflicting types for '_longjmp'
> /usr/include/machine/setjmp.h:335: error: previous declaration of '_longj=
mp'
> was here
> eval.c:211: error: conflicting types for '_longjmp'
> /usr/include/machine/setjmp.h:335: error: previous declaration of '_longj=
mp'
> was here

	As Csaba pointed out, _longjmp is among the things that
changed between cygwin 1.5 and 1.7. So ruby 1.8 cannot be built on
cygwin-1.7 .

	This _longjmp problem was fixed in ruby subversion trunk
revision 23317, and the fix was backported to then-current ruby_1_9_1
branch. So now, all ruby 1.9.x can be built on cygwin-1.7 . But so
far, nobody has made the effort to do the porting and testing of ruby
1.8.x on cygwin-1.7, probably because no more active development is happeni=
ng for ruby 1.8. ruby 1.8 is fading out.

	So what I recommend is

1. Get official ruby-1.8.7-p72-2 from cygwin.com . It was built for cygwin-=
1.5 and is outdated, but it can be used to help build
ruby-1.9.x .
2. Then build ruby 1.9.2 (or trunk).
3. If ruby 1.9.2 is built successfully, uninstall ruby-1.8.7-p72-2 .

	A few weeks ago, I successfully built

ruby 1.9.2p35 (2010-11-02 revision 29665) [i386-cygwin]
ruby 1.9.3dev (2010-11-02 trunk 29669) [i386-cygwin]

from ruby_1_9_2 branch and trunk, respectively. They both showed several te=
st failures (as always on cygwin), but are good enough for my daily usage. =
So, at least these revisions are known to work on cygwin-1.7. (Actually, mo=
st revisions that I have tried worked. The codes seem to be very well maint=
ained.)

	I hope these information helps you build ruby-1.9 on
CYGWIN_NT-6.1-WOW64 .

--
neomjp

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