From: 7stud -- <bbxx789_05ss@...>
Date: 2008-03-23T05:23:08+09:00
Subject: Re: extending ruby with C++

7stud -- wrote:
> Jason Roelofs wrote:
>> $CC = "g++"
>> $CXX = $CC # for good measure.
>> 
>> You should probably go looking around at tutorials on how to build C
>> and C++ code before you go much farther into this project.
>> 
>> Jason
> 
> I know how to compile C++ programs from the command line or using an 
> IDE, but  I don't know how to get extconf.rb to compile C++ programs or 
> what make does.
> 
> 
> Where do those statements go?  Inside extconf.rb?

My current extconf.rb file:

require 'mkmf'

if (/mswin32/ =~ PLATFORM)
    $CFLAGS+=" -GX "    # allow exceptions
end

$LIBS << " -lstdc++ -lc"
$CC =="g++"
$CXX == $CC

create_makefile("Test")

The output:

$ ruby extconf.rb
creating Makefile

$ make
g++ -fno-common -g -Os -pipe -fno-common -pipe  -fno-common -pipe 
-fno-common   -I. -I/usr/lib/ruby/1.8/universal-darwin8.0 
-I/usr/lib/ruby/1.8/universal-darwin8.0 -I.   -c Test.cpp
cc  -bundle  -L"/usr/lib" -o Test.bundle Test.o  -lruby  -lpthread -ldl 
-lobjc   -lstdc++ -lc
/usr/bin/ld: Undefined symbols:
__Unwind_Resume
collect2: ld returned 1 exit status
make: *** [Test.bundle] Error 1

$ls
Makefile        Test.cpp        Test.o          extconf.rb
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