From: Michael Edgar <adgar@...>
Date: 2011-06-24T11:22:22+09:00
Subject: Re: Explicitly setting compiler to C++ in extconf.rb...

On Jun 23, 2011, at 10:07 PM, Darryl L. Pierce wrote:

> On 06/23/2011 07:39 PM, Michael Edgar wrote:
>> 
>> require 'mkmf'
>> have_library('stdc++')
>> create_makefile('laser/BasicBlock')
>> 
>> That's a working extconf.rb for a gem I'm actively working on. Adding stdc++
>> makes mkmf use g++ on my system.
> 
> Hrm, no joy. It's still failing with the same error in mkmf.log.


Just checked, and you're right - same thing happens to me if I insert
a "have_header" for one of my header files. It's failing because mkmf
is creating a file called "conftest.c" and not "conftest.cc" - changing the
name of the file makes it work. Ugh.

It looks like a bug in mkmf.rb:407, in "cpp_command," it uses CONFTEST_C
which ends in .c .

Michael Edgar
adgar@carboni.ca
http://carboni.ca/