From: Luis Lavena <luislavena@...>
Date: 2011-12-13T08:47:56+09:00
Subject: Re: Ruby 1.9.3-p0 + Cygwin 1.7.9-1 + posix-spawn-0.3.6: Can't set RUBY_PLATFORM = cygwin

Daniel Black wrote in post #1036381:
> Hi there,
>
> I've been trying to get jekyll installed within the Cygwin 1.7.9-1
> environment using Ruby 1.9.3-p0 on WinXP. Ruby and RubyGems are working
> fine. However, I continually run into an issue with posix-spawn being
> unable to compile when trying to install Jekyll.
>
> The posix-spawn developers created a patch to keep posix-spawn from
> compiling, as it's unnecessary. However, there are a couple of issues
> I'm having:
>
>    - I can't get this gem (posix-spawn-0.3.6.gem) with the patch
> applied. Installing with 'gem install posix-spawn' after removing from
> cache and gems doesn't pull the fresh code; and

Go here:

http://rubygems.org/gems/posix-spawn

Click download, place posix-spawn-0.3.6.gem somewhere accessible by 
cygwin.

Then:

gem install --local /path/to/posix-spawn-0.3.6.gem

That will install the local copy.

>    - The patch assumes RUBY_PLATFORM ~= "cygwin" (among others).
> However, ruby 1.9.3-p0 sets RUBY_PLATFORM to "i386-cygwin" so the
> comparison won't work.
>

Where you see that?

This commit:

https://github.com/rtomayko/posix-spawn/commit/146a3e665924e76aa45cd2c725dd5a978a74cc8e

Introduces:

RUBY_PLATFORM =~ /(mswin|mingw|cygwin|bccwin)/

Which is a valid regular expression and will be true if RUBY_PLATFORM == 
"i386-cygwin":

>> platform = "i386-cygwin"
=> "i386-cygwin"
>> platform =~ /(mswin|mingw|cygwin|bccwin)/
=> 5
>>

> I'm new to Ruby, and am admittedly only using it for Jekyll (at the
> moment). I realize that some of the issue likely resides within Cygwin,
> but seems I should be able to address each issue within Ruby itself. Can
> I just set RUBY_PLATFORM in the Makefile and rebuild? How can I get the
> updated posix-spawn code? Hand-editing the two changed .rb files in
> posix-spawn to add the comparison doesn't help, as each time I run "gem
> install *" posix-spawn is installed over any changes I've made.
>

1) You can build the gem your self
1.1) Clone posix-spawn repository,
1.2) introduce the modifications
1.3) generate the gem with "rake gem"

2) report the issue to the gem authors:
https://github.com/rtomayko/posix-spawn/issues

3) You can't force RUBY_PLATFORM, that is actually not the problem 
you're experiencing.

--
Luis Lavena

-- 
Posted via http://www.ruby-forum.com/.