From: Luis Lavena <luislavena@...>
Date: 2010-11-29T22:35:36+09:00
Subject: [ruby-core:33466] Re: Planning to release 1.8.7 fixes on 12/25 (Japanese timezone)

On Sun, Nov 28, 2010 at 10:56 PM, Urabe Shyouhei <shyouhei@ruby-lang.org> wrote:
> (2010/11/29 9:53), Luis Lavena wrote:
>> � � � � � Config::MAKEFILE_CONFIG["top_srcdir"] = $top_srcdir =
>> "../ruby" unless e; \
>
> Curious. �You get the exact same error message as you pasted in #4094 ?
> It seems your source directory is ../ruby so ../ruby/ruby.h should exist and
> the error will not raise.

On the original report (#2531), I was getting a reference to the base
ruby used to cross-compile:

Generating callback.func
mkmf.rb can't find header files for ruby at
/home/luis/.rvm/ruby-1.8.7-p248/lib/ruby/ruby.h

While on #4094

Generating callback.func
mkmf.rb can't find header files for ruby at ../ruby/ruby.h

On that report, I've tried to cross-compile "inside" ruby checkout
(mkdir build; cd build; sh ../configure)

I've tried that:

Generating callback.func
mkmf.rb can't find header files for ruby at ../ruby.h

And also outside ruby dir (cd ..; mkdir build-ruby; cd build-ruby; sh
../ruby/configure)

Generating callback.func
mkmf.rb can't find header files for ruby at ../ruby/ruby.h

===

But, noticed the following on master, that top_srcdir is build
relative to the build dir, so this patch:

diff --git a/Makefile.in b/Makefile.in
index 4faabc3..3135f08 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -138,7 +138,8 @@ fake.rb:    Makefile
                  end; \
                end; \
                prehook = proc do |e|; \
-                 Config::MAKEFILE_CONFIG["top_srcdir"] = $$top_srcdir
= "@top_srcdir@" unless e; \
+                 builddir = File.expand_path(File.dirname(__FILE__)); \
+                 Config::MAKEFILE_CONFIG["top_srcdir"] = $$top_srcdir
= File.expand_path("@top_srcdir@", builddir) unle
                  untrace_var(:$$extmk, prehook); \
                end; \
                trace_var(:$$extmk, prehook); \

===

Seems to correct the issue: https://gist.github.com/719946

I'm still unsure why this works on ruby_1_8 but not on ruby_1_8_7 (and
why don't see similar code there related to fake.rb) but setting the
top_srcdir relative to the build directory, works.

Thank you for your time, adding the patch to the ticket.

-- 
Luis Lavena
AREA 17
-
Perfection in design is achieved not when there is nothing more to add,
but rather when there is nothing more to take away.
Antoine de Saint-Exup�ry