Re: SCM_BOOL_T became #nil -- et al. ?

[Hans Aberg]

On 25 Feb 2011, at 13:42, Andy Wingo wrote:

>>  $ guile-config compile
>>  -D_THREAD_SAFE -I/usr/local/include/guile/2.0 -I/usr/local/include  
> 
> The -I/usr/local/include is added for some other library that Guile
> depends on -- GMP or libgc or something else.
> 
> For example on my system I have Guile installed into /opt/guile, and
> libgc and everything else in /usr, and I get:
> 
>  $ guile-config compile
>  -pthread -I/opt/guile/include/guile/2.0  

I do not know why it is added.

>>> The problem this thread is about is if you have Guile 1.8 or previous
>>> eheaders installed in /usr.
>> 
>> The directory /usr/local/include/ is added by the compiler. So
>> possibly, if one has the 1.8 header, it will be included even when
>> using `guile-config compile`.
> 
> Depends on your system, I think.  

But I checked that it is not needed for reading the gmp.h header which is in 
/usr/local/include/.

The funny thing is that it is the Apple tweaked GCC and /usr/local/ is not 
added when installing the system or (I think) the developer package.

> But yes, this is a danger.  Hopefully
> it won't be as "dangerous" when we live in a 2.0+-only world.  I have
> been meaning to write an article or FAQ about /usr/local, and this is a
> good point.

It might be viewed as a problem with 'make install' which does not remove the 
header from 1.8. I'm not sure if it is possible to have that and 2.0 both 
installed. At least the manual is overwritten.