plib-users

Re: R: [Plib-users] Loading ASE file

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

Paolo Leoncini wrote:
> 
> Such complete answer from Steve offer the opportunity for arising an
> important quest for a better documentation for plib,

Yep - you are right - I hang my head in shame.  Part of the problem is
that the documents are not under CVS.


-- 
Steve Baker                  http://web2.airmail.net/sjbaker1
sjb...@ai... (home)  http://www.woodsoup.org/~sbaker
sj...@ht...      (work)

[Plib-users] first try failed

[Anne-Marie M. <a-m...@li...>]

I have Mandrake 7.0, Mesa and glut-3.5 and I can't compile plib-1.1.11.
I get the error message:

in file included from puLocal.h:24
                      from pu.cxx:2:
pu.h: In method 'puFont::puFont()':
pu.h:87:'GLUT_BIPMAP_8_BY_13' undeclared (first use this function)

and so on with 'GLUT_WINDOW_HEIGHT', 'GLUT_WINDOW_WIDTH'........

I am a beginner so I am really lost. My son would like to try Tux, a =
Quest.... What is wrong?
Mesa3.0 is rpm and glut compiled fine.

Thank you for your help!

Anne-Marie
a-m...@li...

Re: [Plib-users] Invert?

[Brad C. <bco...@ac...>]

Steve,

In version 1.0.20 doing a search on all files I was unable to find
a reference to sgInvertMat4.  Do I have a wrong version?

Is it safe to use this function to get the inverse of the projection matrix?

Thanks,

Brad

----- Original Message -----
From: "Steve Baker" <sjb...@ai...>
To: <pli...@li...>
Sent: Wednesday, May 24, 2000 5:12 AM
Subject: Re: [Plib-users] Invert?


> Brad Colbert wrote:
>
> > What happened to the matrix inversion routines that are in the sg
documentation?
>
> *Nothing* happened!  They are alive and well...I use them all the time.
>
> For general matrices:
>
>   void sgInvertMat4 ( sgMat4 dst, const sgMat4 src ) ;
>   void sgInvertMat4 ( sgMat4 dst ) ;
>
> But *much* faster - if you know that the matrix is a simple
> rotate+translate then:
>
>   void sgTransposeNegateMat4 ( sgMat4 dst, const sgMat4 src ) ;
>   void sgTransposeNegateMat4 ( sgMat4 dst ) ;
>
> ...and of course there are double-precision versions.
>
> Hmmm - the documentation seems to be correct...they work OK...
>
> What's your problem?!?
>
> --
> Steve Baker                  http://web2.airmail.net/sjbaker1
> sjb...@ai... (home)  http://www.woodsoup.org/~sbaker
> sj...@ht...      (work)
>
> _______________________________________________
> plib-users mailing list
> pli...@li...
> http://lists.sourceforge.net/mailman/listinfo/plib-users
>

R: [Plib-users] Loading ASE file

[Paolo L. <p.l...@ci...>]

Such complete answer from Steve offer the opportunity for arising an
important quest for a better documentation for plib, and in particular for
ssg as the most used library in the pool.
The example is the method getByName() as shown at work in the Steve's code:

   ssgEntity *my_animation_node = root -> getByName ( "my_animation" ) ;

Of course, not to mention, I wrote such a function by my own (in several
variants, but for sure some graph structure would not be supported). Ok, it
all goes in the experience knapsack, but many of you know how one feels when
have worked on something already available (somewhere there, rather hidden,
though).

Stop there, Steve! I'm not asking you directly to write improved doc, nor
anybody else in particular. I just want to say that plib, for the large
interest that is going to draw, and for the quality code it relies upon,
would deserve a better treatment on the doc side, and we should think about
it just after 1.2.

Greetings -

Paolo

> -----Messaggio originale-----
> Da: pli...@li...
> [mailto:pli...@li...]Per conto di Steve Baker
> Inviato: mercoledì 24 maggio 2000 14.13
> A: pli...@li...
> Oggetto: Re: [Plib-users] Loading ASE file
>
>
> > Dave McClurg wrote:
> >
> > > I see that there is some form of animation in the ase loader.
> > > How can I use this. Like play the animation back once its loaded?
>
> Well, *if* they were supported by the loader, then you'd attach
> a textual name to the object in the modeller (dunno how you do
> that in ASE files - but that kind of thing is generally
> quite easy in most modellers).  Then you can load the model
> and using the 'root' node that the loader returned:
>
>    root = ssgLoad ( "my_file.ase" ) ;
>
>    ...
>
>    ssgEntity *my_animation_node = root -> getByName ( "my_animation" ) ;
>
>    if ( my_animation_node == NULL )
>      fprintf ( stderr, "My_animation is missing!\n" ) ;
>    else
>    if ( ! my_animation_node -> isAKindOf ( ssgTypeTimedSelector () ) )
>      fprintf ( stderr, "My_animation *isn't* an animation?!?\n" ) ;
>    else
>    {
>      ((ssgTimedSelector *)my_animation_node) -> control

> SSG_ANIM_START ) ;
>      ...or whatever...
>    }
>
> > ssgSelector and its derivations only support up to 32 frames.
> > That limits what could quickly be done with MESH_ANIMATION.
> > But MESH_ANIMATION is much more convenient than managing multiple
> > shapes as files and should be added to PLIB as soon as needed.
>
> We need to do something about that.  I'd originally only intended
> ssgSelector to be a simple switch-like mechanism - and the idea for
> an ssgTimedSelector came along much later.  There are ways to fake
> an animation with more kids than that yourself using callback functions.
>
> The folding paper demo I posted a week or so ago has HUNDREDS of
> animation steps - implemented by pointing an ssgBranch node at a
> different child node each frame in the application code.  Not
> elegant - but it *does* work.
>
> It should be quite easy to fix ssgSelector to have more child nodes,
> we just need to be careful to preserve the current API for people
> who don't need more than 32 nodes.
>
> --
> Steve Baker                  http://web2.airmail.net/sjbaker1
> sjb...@ai... (home)  http://www.woodsoup.org/~sbaker
> sj...@ht...      (work)
>
> _______________________________________________
> plib-users mailing list
> pli...@li...
> http://lists.sourceforge.net/mailman/listinfo/plib-users
>

Re: [Plib-users] Loading ASE file

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

> Dave McClurg wrote:
> 
> > I see that there is some form of animation in the ase loader.
> > How can I use this. Like play the animation back once its loaded?

Well, *if* they were supported by the loader, then you'd attach
a textual name to the object in the modeller (dunno how you do
that in ASE files - but that kind of thing is generally
quite easy in most modellers).  Then you can load the model
and using the 'root' node that the loader returned:

   root = ssgLoad ( "my_file.ase" ) ;

   ...

   ssgEntity *my_animation_node = root -> getByName ( "my_animation" ) ;

   if ( my_animation_node == NULL )
     fprintf ( stderr, "My_animation is missing!\n" ) ;
   else
   if ( ! my_animation_node -> isAKindOf ( ssgTypeTimedSelector () ) )
     fprintf ( stderr, "My_animation *isn't* an animation?!?\n" ) ;
   else
   {
     ((ssgTimedSelector *)my_animation_node) -> control ( SSG_ANIM_START ) ;
     ...or whatever...
   }

> ssgSelector and its derivations only support up to 32 frames.
> That limits what could quickly be done with MESH_ANIMATION.
> But MESH_ANIMATION is much more convenient than managing multiple
> shapes as files and should be added to PLIB as soon as needed.

We need to do something about that.  I'd originally only intended
ssgSelector to be a simple switch-like mechanism - and the idea for
an ssgTimedSelector came along much later.  There are ways to fake
an animation with more kids than that yourself using callback functions.

The folding paper demo I posted a week or so ago has HUNDREDS of
animation steps - implemented by pointing an ssgBranch node at a
different child node each frame in the application code.  Not
elegant - but it *does* work.

It should be quite easy to fix ssgSelector to have more child nodes,
we just need to be careful to preserve the current API for people
who don't need more than 32 nodes.

-- 
Steve Baker                  http://web2.airmail.net/sjbaker1
sjb...@ai... (home)  http://www.woodsoup.org/~sbaker
sj...@ht...      (work)

Re: [Plib-users] Invert?

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

Brad Colbert wrote:

> What happened to the matrix inversion routines that are in the sg documentation?

*Nothing* happened!  They are alive and well...I use them all the time.

For general matrices:

  void sgInvertMat4 ( sgMat4 dst, const sgMat4 src ) ;
  void sgInvertMat4 ( sgMat4 dst ) ;

But *much* faster - if you know that the matrix is a simple
rotate+translate then:

  void sgTransposeNegateMat4 ( sgMat4 dst, const sgMat4 src ) ; 
  void sgTransposeNegateMat4 ( sgMat4 dst ) ;

...and of course there are double-precision versions.

Hmmm - the documentation seems to be correct...they work OK...

What's your problem?!?

-- 
Steve Baker                  http://web2.airmail.net/sjbaker1
sjb...@ai... (home)  http://www.woodsoup.org/~sbaker
sj...@ht...      (work)

RE: [Plib-users] Loading ASE file

[Dave M. <Dav...@dy...>]

> I see that there is some form of animation in the ase loader.
> How can I use this. Like play the animation back once its loaded?
> 
There are two types of animation in an ASE file.

TM_ANIMATION - transforms
MESH_ANIMATION - changes all the vertex data

Currently, there is *no* support for these in the ssgLoadASE.cxx loader

ssgSelector and its derivations only support up to 32 frames.
That limits what could quickly be done with MESH_ANIMATION.
But MESH_ANIMATION is much more convenient than managing multiple
shapes as files and should be added to PLIB as soon as needed.

For TM_ANIMATION, a new ssgTransformSelector entity would be needed.
I've done some preliminary work on this but my work schedule hasn't
permitted me to finish it.  Are you interested in helping out?
Do you have any models that have animation in them?

--Dave McClurg

[Plib-users] Loading ASE file

[Larry H. <va...@gt...>]

I see that there is some form of animation in the ase loader.
How can I use this. Like play the animation back once its loaded?

[Plib-users] Invert?

[Brad C. <bco...@ac...>]

Steve,

What happened to the matrix inversion routines that are in the sg documentation?

;)

Brad Colbert
GreyStone Technology, Inc.
bco...@ac...
(858) 874-7000

Re: [Plib-users] New user, GL includes not being found

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

the...@ex... wrote:
> 
> Hi,
> 
> I'm trying to install PLIB in order to install FlightGear.  When I run
> configure and make, it's not finding gl.h and other files in GL.  gl.h is
> present in /usr/X11R6/include/GL, but I'm not sure how to tell the compiler
> to find it there.  Any help would be appreciated.
> 
> FYI I am running RH 6.2 distribution.

RedHat have installed gl.h in the wrong place. The standard
is defined by section 4 of this document:

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

So OpenGL headers should be in /usr/include/GL/gl.h and glu.h
(GLUT headers should be in the same place).

The libraries should be in /usr/lib/libGL.so and libGLU.so - with
GLUT in /usr/lib/libglut.so

The simplest thing is to create a couple of symbolic links pointing
from the correct place to wherever RH dropped them.

-- 
Steve Baker                  http://web2.airmail.net/sjbaker1
sjb...@ai... (home)  http://www.woodsoup.org/~sbaker
sj...@ht...      (work)

[Plib-users] New user, GL includes not being found

[<the...@ex...>]

Hi,

I'm trying to install PLIB in order to install FlightGear.  When I run
configure and make, it's not finding gl.h and other files in GL.  gl.h is
present in /usr/X11R6/include/GL, but I'm not sure how to tell the compiler
to find it there.  Any help would be appreciated.  

FYI I am running RH 6.2 distribution.

Messages from make:

../../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

Thanks,

Dave





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[Plib-users] Need I use irix-hack.pl before I make the file in SGI?

[Weining Gu <cr...@us...>]

From the web site of Flight Gear, there's a README.Unix,
ftp://ftp.aem.umn.edu/pub/fgfs/Source/Snapshots/FlightGear-0.7.3/docs-mini

Need I use the following steps to compile plib and FlighrGear-0.7.3?
 sh$ CC="cc -Xcpluscomm" CXX=CC ./configure
 find . -name Makefile -exec  ./irix-hack.pl {} \;
 make
 su
 make install 

Actually, I can compile Plib files only using: 
./configure
make
su
make install
 
Thanks.

-Wein


P.S.

IV. Procedure to build FGFS with Native SGI Irix Compilers from CVS Sources
====================================================================

(Contributed by Todd Smith <ms...@si...> with modifications
and updates by Curt Olson)

Download the latest version of plib (1.1.11) from:

    http://www.woodsoup.org/~sbaker/plib/

Configure it with the default prefix of /usr/local which places
everthing in a tree rooted at /usr/local/plib:

    sh$ CC="cc -Xcpluscomm" CXX=CC ./configure

*Before* running make, fix up the plib Makefiles using the script
provided with the Flight Gear distribution:

    find . -name Makefile -exec .../src/FlightGear-0.7.x/irix-hack.pl {} \;

This applies a fix in all the Makefiles to the lib creation command
(to use CC -ar rather than ar) as per a tip in the SGI pipeline
periodical.

Now, make and install plib.

Download the latest fgfs source snapshot from:

    ftp://ftp.flightgear.org/pub/fgfs/Source/Snapshots/

Configure and build fgfs as you did plib:

    sh$ CC="cc -Xcpluscomm" CXX=CC ./configure
    sh$ find . -name Makefile -exec .../src/FlightGear-0.7.x/irix-hack.pl {}
\;




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Re: [Plib-users] sgFrustum setting to the same as opengl

[Oliver B. <sh...@ih...>]

A stray old version of plib was sitting somewhere where it shouldnt
have been - I still get the wierdness even after that frustum code
so it cant be that ...  

I transform the "center" of each quad
then I put it into a new sphere with the required radius
then i test if its in the frustum

but when I turn around to face the origin they all dissapear
but come back if I roll upside down ...

I am transforming with the same matrix as given to opengl 
then subtracting the camera position as given to gltranslate

I cant see what im doing wrong :(

Oliver


On Wed, 10 May 2000, you wrote:
> oops sorry
> it is in there I looked in the header file ... so why it does that I
> dont know ..
> 
> _______________________________________________
> plib-users mailing list
> pli...@li...
> http://lists.sourceforge.net/mailman/listinfo/plib-users

Re: [Plib-users] sgFrustum setting to the same as opengl

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

Oliver Batchelor wrote:
 
> view.cpp:42: no matching function for call to `sgFrustum::getMat4 ()'
> all the other sg functions work fine so  ?

Well, sg.h, line 871 inside the sgFrustum definition:

  void getMat4 ( sgMat4 dst ) { sgCopyMat4 ( dst, mat ) ; }                 

...um - I wonder if that was added sometime recently?  What
PLIB version do you have?

-- 
Steve Baker                  http://web2.airmail.net/sjbaker1
sjb...@ai... (home)  http://www.woodsoup.org/~sbaker
sj...@ht...      (work)

Re: [Plib-users] sgFrustum setting to the same as opengl

[Oliver B. <sh...@ih...>]

oops sorry
it is in there I looked in the header file ... so why it does that I
dont know ..

Re: [Plib-users] sgFrustum setting to the same as opengl

[Oliver B. <sh...@ih...>]

view.cpp:42: no matching function for call to `sgFrustum::getMat4 ()'
all the other sg functions work fine so  ?

On Wed, 10 May 2000, you wrote:
> Oliver Batchelor wrote:
> > 
> > I have a function for setting up a view frustum  I want to know if
> > its getting the right values to be setup the same as the opengl one
> > ...
> > I am getting some wierd results in my landscape renderer -
> > If I roll around etc everything dissapears  but I cant see whats
> > going wrong ...
> > 
> > here is the setup code ...
> > 
> > void View::Set(float angle, float near, float far) {
> >     glMatrixMode(GL_PROJECTION);
> >     glLoadIdentity();                           // Reset The Projection Matrix
> > 
> >     gluPerspective(angle, 640.0/480.0, near, far);      // Calculate The Aspect Ratio Of The Window
> >     glMatrixMode(GL_MODELVIEW);
> > 
> >     frustum.setFOV(angle, angle) ;
>                      ^^^^^^^^^^^^
>                That's going to set the HFOV and VFOV to the
>                same values - but you (seem to) have a 640x480
>                window.  Try using  (angle,-1) - and we'll compute
>                the second angle for you assuming a 3:4 aspect
>                ratio.
> 
> Dunno if that's enough to account for your wierdness.
> 
> You could also use a sgFrustum::getMat4 to grab the matrix out
> of the sgFrustum - then you can use glLoadMatrix to put it
> onto the projection stack - no messing with gluPerspective - and
> it guarantees a good match.
> 
> -- 
> Steve Baker                  http://web2.airmail.net/sjbaker1
> sjb...@ai... (home)  http://www.woodsoup.org/~sbaker
> sj...@ht...      (work)
> 
> _______________________________________________
> plib-users mailing list
> pli...@li...
> http://lists.sourceforge.net/mailman/listinfo/plib-users

Re: [Plib-users] sgFrustum setting to the same as opengl

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

Oliver Batchelor wrote:
> 
> I have a function for setting up a view frustum  I want to know if
> its getting the right values to be setup the same as the opengl one
> ...
> I am getting some wierd results in my landscape renderer -
> If I roll around etc everything dissapears  but I cant see whats
> going wrong ...
> 
> here is the setup code ...
> 
> void View::Set(float angle, float near, float far) {
>     glMatrixMode(GL_PROJECTION);
>     glLoadIdentity();                           // Reset The Projection Matrix
> 
>     gluPerspective(angle, 640.0/480.0, near, far);      // Calculate The Aspect Ratio Of The Window
>     glMatrixMode(GL_MODELVIEW);
> 
>     frustum.setFOV(angle, angle) ;
                     ^^^^^^^^^^^^
               That's going to set the HFOV and VFOV to the
               same values - but you (seem to) have a 640x480
               window.  Try using  (angle,-1) - and we'll compute
               the second angle for you assuming a 3:4 aspect
               ratio.

Dunno if that's enough to account for your wierdness.

You could also use a sgFrustum::getMat4 to grab the matrix out
of the sgFrustum - then you can use glLoadMatrix to put it
onto the projection stack - no messing with gluPerspective - and
it guarantees a good match.

-- 
Steve Baker                  http://web2.airmail.net/sjbaker1
sjb...@ai... (home)  http://www.woodsoup.org/~sbaker
sj...@ht...      (work)

Re: [Plib-users] transforming a sgSphere each frame ?

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

Oliver Batchelor wrote:
> 
> for a frustum cull I need to transform a sgSphere each frame by a
> matrix  but  If I use the orthoXform then it gets changed each frame ?
> how can I avoid this ?

I think you need to make a copy of the sphere and transform that.

> the sphere::getCentre  how do I use that also It returns a pointer to
> a sgfloat   but I cant make it equal to a sgVec3   and If I make it
> equal to a float *   then use it like
> 
> variable[0]   variable[1]   variable[2]    for the x y and z it
> contains rubish ...

I'm not sure I understand your problem - but those routines are only
a couple of lines each - so "Use the Source Luke".

-- 
Steve Baker                  http://web2.airmail.net/sjbaker1
sjb...@ai... (home)  http://www.woodsoup.org/~sbaker
sj...@ht...      (work)

[Plib-users] sgFrustum setting to the same as opengl

[Oliver B. <sh...@ih...>]

I have a function for setting up a view frustum  I want to know if
its getting the right values to be setup the same as the opengl one
... 
I am getting some wierd results in my landscape renderer -
If I roll around etc everything dissapears  but I cant see whats
going wrong ...

here is the setup code ...

void View::Set(float angle, float near, float far) {
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();				// Reset The Projection Matrix

    gluPerspective(angle, 640.0/480.0, near, far);	// Calculate The Aspect Ratio Of The Window
    glMatrixMode(GL_MODELVIEW);

    frustum.setFOV(angle, angle) ;
    frustum.setNearFar(near, far) ;

    GetGLError("View::Set()");
}

the code which acts wierd looks like : 
	 center=bounds.getCenter();
            sgFullXformPnt3(tform, center, land->camera->rotation);
	 tform[0]-=land->camera->position[0];
	 tform[1]-=land->camera->position[1];
	 tform[2]-=land->camera->position[2];
	
	 temp->setCenter(tform);
	 temp->setRadius(bounds.getRadius());
	
             if(!land->view->frustum.contains(temp)) return;

and the code for setting up the bouds sphere is  :

 for(a=0; a<4; a++)
   bounds.extend(&land->Vertices[Vertex[a]*3]);

Thanks a heap
Oliver Batchelor 

[Plib-users] transforming a sgSphere each frame ?

[Oliver B. <sh...@ih...>]

for a frustum cull I need to transform a sgSphere each frame by a
matrix  but  If I use the orthoXform then it gets changed each frame ?
how can I avoid this ?

the sphere::getCentre  how do I use that also It returns a pointer to
a sgfloat   but I cant make it equal to a sgVec3   and If I make it
equal to a float *   then use it like

variable[0]   variable[1]   variable[2]    for the x y and z it
contains rubish ...


thanks,
Oliver Batchelor

Re: [Plib-users] slScheduler: Too many pending callback events!

[Per L. <li...@ho...>]

On Fri, 05 May 2000, Trent Gamblin wrote:
> * Steve Baker <sjb...@ai...> wrote:
> > This is *very* strange...I've never heard anything like this before.
> 
> I had the same problem, but it's easily fixed. Look in example.cxx
> around line 50 or so. It's trying to load /u/steve/fhead.wav, and
> loading wheeee.ub is commented out.

Yes, this fixed the example program...thanks.

Upgrading the SB Live module also gives me sound in FG and Torcs. I guess the
drivers shipped with SuSE 6.3 were just too old.

Regards,
Per Liedman

-- 
   / Per Liedman
  / li...@ho...
 / www.mdstud.chalmers.se/~md6pl
/ 031-825659 / 0705-520455

Re: [Plib-users] Great! Thank you, Bram Stolk&Steve Baker

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

Wein Gui wrote:

> > remove config.cache and try again.

Yep - always good advice.  That cache is generally more
trouble than it's worth. I wish there was a way to permenantly
disable it.  I wrote a script that I run instead of ./configure
that removes the cache before it configures things.


> By the way, I hope to learn some detail things about config.cache,
> variable setting, etc. Where can I find some web sites to explain
> these? I already knew one:  http://www.gnu.org/manual/manual.html

The autoconf and automake manuals are the best places to find this
stuff - don't have an exact URL - but they aren't hard to find.

> Anything else?

When things go wrong in configure (like when it just told you that
cc -Wall didn't work), look at the file 'config.log' - which shows
you what exactly the configure script was trying to do - and what
errors it got when it tried.

...my next suggestion was going to be "Mail me config.log" - but
then you fixed it.

BTW: If you are having trouble getting FGFS to compile with the
SGI C++ compiler, I'm sure Curt will want to know about it. The
native C++ is quite a bit faster than G++ on IRIX/MIPS machines.

-- 
Steve Baker                  http://web2.airmail.net/sjbaker1
sjb...@ai... (home)  http://www.woodsoup.org/~sbaker
sj...@ht...      (work)

[Plib-users] Great! Thank you, Bram Stolk&Steve Baker

[Wein G. <cr...@us...>]

 
> > checking for gcc... (cached) cc
> > checking whether the C compiler (cc -Wall ) works... no
> > configure: error: installation or configuration problem: C compiler
cannot
> > create executables.
> > $
> > 
> > Any further suggestion? Thanks again.
> 
> remove config.cache and try again.
> 
> config.cache should always be removed if you have changed
> the CC, CXX, CFLAGS or CXXFLAGS environment vars.
 
Great! No compile problems in my SGI system. I can use either SGI
C++ compiler or Gnu gcc/g++ compiler.  Sounds PLIB is a more
reliable software. Thank you again!

By the way, I hope to learn some detail things about config.cache,
variable setting, etc. Where can I find some web sites to explain 
these? I already knew one:  http://www.gnu.org/manual/manual.html
Anything else? 

Best regards,

-Wein



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[Plib-users] Re: [Plib-devel] No errors in SGI C++ compiling, many thanks. But...

[Bram S. <br...@ch...>]

Wein Gui wrote:

> checking for gcc... (cached) cc
> checking whether the C compiler (cc -Wall ) works... no
> configure: error: installation or configuration problem: C compiler cannot
> create executables.
> $
> 
> Any further suggestion? Thanks again.

remove config.cache and try again.

config.cache should always be removed if you have changed
the CC, CXX, CFLAGS or CXXFLAGS environment vars.


-- 
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  Bram Stolk               "Linux - Why use windows, if there is a door?"
  work: br...@sa...
  priv: br...@ch...

[Plib-users] No errors in SGI C++ compiling, many thanks. But...

[Wein G. <cr...@us...>]

>>   When using SGI c/c++ compiler 7.3 to compile plib and FlightGear`s
>>   code, I met many errors, and couldn`t continue compiling it.
>
> I have compiled PLIB under SGI`s C++ compiler (dunno if it was v7.3 or
> not though).  Could you tell me what the errors were - I`d like for it
> to compile under SGI`s compiler.

After I modified some codes according to you last answer, plib can be
compiled without errors in my SGI Irix 6.5.7 with SGI C++ compiler. 
Thank you so much.

Because of some errors in compiling FlightGear in SGI C++, I need to
re-compile both plib and FlightGear in GNU gcc/g++. 
           
>>   Therefore, I must change to GNU platform. But, I don`t know how to
>>   change autoconf(configure.in, etc.) to my case, i.e. to use gcc/g++
>>   instead of former cc/CC of original SGI compiler. By the way,
>>   I already installed a gcc-2.95.2 Compiler Suite.
>  
>           For GNU, you could do:
>
>           export CC=gcc
>           export CXX=g++
>           export CFLAGS=-Wall
>           export CXXFLAGS=-Wall
>           ./configure

Some errors appears after I followed this way:

1% sh
$ export CC=gcc
$ export CXX=g++
$ export CFLAGS=-Wall
$ export CXXFLAGS=-Wall
$ ./configure
loading cache ./config.cache
checking for a BSD compatible install... ./install-sh -c
checking whether build environment is sane... yes
checking whether make sets ${MAKE}... (cached) yes
checking for working aclocal... missing
checking for working autoconf... missing
checking for working automake... missing
checking for working autoheader... missing
checking for working makeinfo... missing
includedir changed to ${prefix}/include/plib libdir is ${exec_prefix}/lib
checking for gcc... (cached) cc
checking whether the C compiler (cc -Wall ) works... no
configure: error: installation or configuration problem: C compiler cannot
create executables.
$ 

Any further suggestion? Thanks again.


-Wein

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