From: Norman Su <normsu@...>
Date: 2002-12-20T10:38:03+09:00
Subject: msys w/ FXRuby

Hi, I'm currently trying to compile FXRuby 1.0.17 with the latest version of 
minGW/msys installed on Windows XP:

normsu[170]$ uname -sr
MINGW32_NT-5.1 1.0.8(0.46/3/2)
normsu[171]$ gcc -v
....
Thread model: win32
gcc version 3.2 (mingw special 20020817-1)

I've managed to compile fox-1.0.17 and ruby-1.6.8 (preview 4) without a hitch.
(I had to change some paths for ruby though-- for example /usr/local => 
c:/msys/1.0/local) However, once I got to compiling FXRuby, I had to get rid 
of the -fno-strict-prototype flags being added in /ext/fox/extconf.rb because 
gcc was complaining.  After that, I get farther but run into the following error:

g++ -DIMPORT -DNT -D__NO_ISOCEXT -g -O2  -DWIN32 -Iinclude -I. -IC:/msys/1.0/local/
lib/ruby/1.6/i686-mingw32 -IC:/msys/1.0/home/normsu/FXRuby-1.0.17/ext/fox 
-DHAVE_SYS_TIME_H -DHAVE_SIGNAL_H   -IC:/msys/1.0/local/include/fox -I/usr/local/
include -c -o opengl_wrap.o opengl_wrap.cpp
opengl_wrap.cpp: In function `VALUE FXGLViewer_readPixels(FXGLViewer*, int, 
   int, int, int)':
opengl_wrap.cpp:724: `alloca' undeclared (first use this function)
opengl_wrap.cpp:724: (Each undeclared identifier is reported only once for each 
   function it appears in.)
make: *** [opengl_wrap.o] Error 1

I scoured the mailing lists and I've seen some related errors with Solaris, but 
apparently no solutions.  I've tried fiddling with ruby.h's 
"if defined(HAVE_ALLOCA_H) etc." as described by Lyle in previous postings, but
the error persists.  I also tried changing some of the intern.h definitions as 
described in "list of things that can go wrong" section, but that doesn't help 
as well.

<sigh> Any ideas?  Am I supposed to use a different version of ruby?  Am I doing
something incredibly stupid?

Thank you,

-- 
Norman