plib-users

[Plib-users] problems with configure

[<ph...@bo...>]

configure does not seem to be picking up my installation of mesa.

I have /usr/local/include/GL/gl.h, etc.
I have /usr/local/lib/libGL.so

I'm using g++ installed in /opt/sfw  (solaris 8)

But I tried both configure with no args, and
configure --includedir=/usr/local/include --libdir=/usr/local/lib


It still says

checking for glNewList in -lGL... no
checking for glNewList in -lMesaGL... no
checking for gluLookAt in -lGLU... no
checking for gluLookAt in -lMesaGLU... no


But when I do it myself, I see it.

zaphod$ nm /usr/local/lib/libGL.so | grep glNewList
[2909]  |    309496|      56|FUNC |GLOB |0    |9      |glNewList


Similarly, the pui compilation is not seeing the include files:

../../src/fnt/fnt.h:11: GL/gl.h: No such file or directory
../../src/fnt/fnt.h:12: GL/glu.h: No such file or directory


But they are in /usr/local/include!

Re: [Plib-users] problems with configure

[Steve B. <sjb...@ai...>]

Philip Brown wrote:
> 
> configure does not seem to be picking up my installation of mesa.
> 
> I have /usr/local/include/GL/gl.h, etc.
> I have /usr/local/lib/libGL.so

Those are not the correct places. OpenGL *MUST* be installed here:

   /usr/include/GL/gl.h
   /usr/lib/libGL.so
   /usr/lib/libGLU.so

These are the 'official' locations on every Linux/UNIX derivative
I can think of.

-- 
Steve Baker   HomeEmail: <sjb...@ai...>
              WorkEmail: <sj...@li...>
              HomePage : http://web2.airmail.net/sjbaker1
              Projects : http://plib.sourceforge.net
                         http://tuxaqfh.sourceforge.net
                         http://tuxkart.sourceforge.net
                         http://prettypoly.sourceforge.net

Re: [Plib-users] problems with configure

[<ph...@bo...>]

[ Steve Baker writes ]
> Philip Brown wrote:
> > 
> > configure does not seem to be picking up my installation of mesa.
> > 
> > I have /usr/local/include/GL/gl.h, etc.
> > I have /usr/local/lib/libGL.so
> 
> Those are not the correct places. OpenGL *MUST* be installed here:
> 
>    /usr/include/GL/gl.h
>    /usr/lib/libGL.so
>    /usr/lib/libGLU.so
> 
> These are the 'official' locations on every Linux/UNIX derivative
> I can think of.

That is not true. It is commonly installed in /usr/local
In fact, when compiling from source, [mesa] DEFAULTS TO INSTALL IN
/usr/local unless you specifically override it.

So there are two things odd with plib configure;

1. it doesn't automatically check in /usr/local for GL stuff. Why not?
  Other GNU software knows to check /usr/local/include for stuff

2. Why isn't it doing anythig when I give the
  --includedir  and --libdir  args?
If those flags are only used for include/lib file INSTALLATION, it should
be better documented.

Re: [Plib-users] problems with configure

[Steve B. <sjb...@ai...>]

Philip Brown wrote:
> 
> [ Steve Baker writes ]
> > Philip Brown wrote:
> > >
> > > configure does not seem to be picking up my installation of mesa.
> > >
> > > I have /usr/local/include/GL/gl.h, etc.
> > > I have /usr/local/lib/libGL.so
> >
> > Those are not the correct places. OpenGL *MUST* be installed here:
> >
> >    /usr/include/GL/gl.h
> >    /usr/lib/libGL.so
> >    /usr/lib/libGLU.so
> >
> > These are the 'official' locations on every Linux/UNIX derivative
> > I can think of.
> 
> That is not true. It is commonly installed in /usr/local

Commonly - perhaps - but certainly incorrectly.

I refer you to the standard:

  http://oss.sgi.com/projects/ogl-sample/ABI/

...this is the standard for Linux, IRIX has always been this way, 
BSD and Solaris.

The practical problem with allowing libraries (especially OpenGL)
to be in any of a gazillion places is that people frequently get
one OpenGL installed on their machine (hopefully in the correct
place) then install another somewhere else when they get the right
version for their hardware - they frequently have it installed in
three or four places (/usr/X11R6/lib is another frequent place).

What happens is that the wrong one gets loaded in some programs
and not others - and the resulting complaint ("Program X runs
fast, program Y crashes and program Z runs - but really slowly")
is *REALLY* hard to diagnose...not only do you not know which
library is installed in which of the usual places - but you also
don't know which one the complex interaction of symlinks, configure
'guesses', ldconfig and /etc/ld.so.conf may have landed you with.

Hence there is now ONE STANDARD - agreed by more or less everyone.

It works - it's the rule.

-- 
Steve Baker   HomeEmail: <sjb...@ai...>
              WorkEmail: <sj...@li...>
              HomePage : http://web2.airmail.net/sjbaker1
              Projects : http://plib.sourceforge.net
                         http://tuxaqfh.sourceforge.net
                         http://tuxkart.sourceforge.net
                         http://prettypoly.sourceforge.net

Re: [Plib-users] problems with configure

[<ph...@bo...>]

[ Steve Baker writes ]
> Philip Brown wrote:
> > 
> > [ Steve Baker writes ]
> > > Those are not the correct places. OpenGL *MUST* be installed here:
> > >
> > >    /usr/include/GL/gl.h
> > >    /usr/lib/libGL.so
> > >    /usr/lib/libGLU.so
> > >
> > > These are the 'official' locations on every Linux/UNIX derivative
> > > I can think of.
> > 
> > That is not true. It is commonly installed in /usr/local
> 
> Commonly - perhaps - but certainly incorrectly.
> 
> I refer you to the standard:
> 
>   http://oss.sgi.com/projects/ogl-sample/ABI/
> 

Like I already said; Mesa defaults to /usr/local.
It does that now. It's been that way for many years.

If you are not willing to change your autoconfiguration to work with the
number 2 most common OpenGL implementation (heck, by now, possibly 
number *1* most common OpenGL implementation), then kindly take out the
claims of  "these libraries are designed to be easily portable"
in your README file.