[GRASS5] configure goof?

[Glynn Clements]

David D Gray wrote:

> > >This is picking up Tcl/Tk for TkStep, an old version I still require in 
> > >/usr/local/*. I tried to configure as you can see that it would pick up 
> > >the correct 8.3 libs in /usr/* (I actually have 6 Tcl versions scattered 
> > >about). Then I noticed that this only appends the include and lib 
> > >directories specified. If that is the case, it seems wrong to me: the 
> > >`--with-tcl-incudes' should specify where to look, or at least prepend 
> > >the specified directory. I notice the tiff libs are searched the same 
> > >way, perhaps all search paths are specified this way. If so, can they 
> > >all be changed?
> > >
> >  
> >  I've fixed the configure checks.
> 
> It's still picking up the headers in the /usr/local/include directory. 
> However if I disable these temporarily, the correct headers in 
> /usr/include are found.

I think that you're experiencing gcc's default header search path:

	/usr/local/include
	/usr/<platform>/include
	/usr/lib/gcc-lib/<platform>/<version>/include
	/usr/include

If you install headers into /usr/local/include, they effectively
supersede any corresponding headers in /usr/include. In general, don't
install headers into /usr/local/include if you want to still be able
to use the versions from /usr/include.

You can force the addition of -I/usr/include with:

	--with-tcltk-includes=/usr/include

On GNU-only systems (i.e. Linux), that's generally safe, but on other
systems (notably Solaris) it's often fatal (typically, gcc picks up
the system's stdarg.h from /usr/include instead of gcc's version and
bad things happen thereafter).

The original behaviour was incorrect (the library-specific -I switches
*should* be prepended), but it wasn't responsible for your problem.

-- 
Glynn Clements <glynn.clements at virgin.net>