Re: [Boost-build] Support for GCC 4.2 on darwin

Subject: Re: [Boost-build] Support for GCC 4.2 on darwin
From: Ian Emmons (iemmons_at_[hidden])
Date: 2009-01-09 09:32:09

Steven,

Thanks for your help.  I inserted the following line just before line  
122 (in the version of boost.build that ships with boost 1.37.0):

     ECHO TRACE $(version) ;

When I invoked bjam, this line printed twice:

     TRACE 4.0
     TRACE 4.2

My user-config.jam contains the following:

    using darwin
       :  4.0
       :
       :
       ;
    using darwin
       :  4.2
       :  g++-4.2
       :
       ;

It would appear that the condition "4.0" < "4.0.0" evaluates to true,  
when we (or at least I) would like it to evaluate to false.  Should I  
specify the versions in user-config.jam with all three version  
segments?  If I do so (changing 4.0 and 4.2 to 4.0.1 and 4.2.1  
respectively), then the compilation succeeds with both versions of the  
compiler.

So, I guess I have my workaround.  I'll leave it to you to decide  
whether the condition "4.0" < "4.0.0" should evaluate as true or false  
(and therefore whether there is a bug here or not).

Thanks,

Ian

On Jan 8, 2009, at 9:43 PM, Steven Watanabe wrote:

AMDG

Ian Emmons wrote:
> I am using bjam 3.1.17 on MacOS 10.5.6, and when I try to use the  
> GCC 4.2 compiler installed by Xcode (Apple's development  
> environment), it gives me this error:
>
> cc1plus: error: unrecognized command line option "-Wno-long-double"
>
> This happens whether I am using the version of boost.build that is  
> bundled with boost 1.37.0 or the version that is current on the  
> boost.build web site.
>
> A similar problem occurs when I use bjam 3.1.17 on MacOS 10.5.6 with  
> the GCC 4.0 compiler.  In this case the error message is this:
>
> cc1plus: error: unrecognized command line option "-fcoalesce- 
> templates"
>
> This does not happen with the version of boost.build that is current  
> on the boost.build web site, but it does happen when I am using the  
> version that is bundled with boost 1.37.0 (which I understand is the  
> newer version).

darwin.jam line 122 has a test to prevent this.
Can you check the value of $(version)?

In Christ,
Steven Watanabe