Re: Patch to specify out-of-tree gdk-pixbuf-csource for cross compiling

[Owen Taylor <otaylor redhat com>]

Sven Neumann <sven gimp org> writes:

> Hi,
> 
> Michael Natterer <mitch gimp org> writes:
> 
> > Done. Unfortunately, I noticed that the stuff I did to the configure
> > scripts won't work...
> > 
> > What I did is:
> > 
> > AM_CONDITIONAL(CROSS_COMPILING, test $build != $host)
> > 
> > if test $CROSS_COMPILING; then
> >   (...)
> > 
> > 
> > but CROSS_COMPILING expands to CROSS_COMPILING_TRUE and CROSS_COMPILING_FALSE
> > in the generated configure...
> > 
> > The following version would work but looks ugly...
> > 
> > AM_CONDITIONAL(CROSS_COMPILING, test $build != $host)
> > 
> > if test x$CROSS_COMPILING_FALSE = x; then
> >   (...)
> 
> what about something like this:
> 
> if test $build != $host; then
>   cross_compiling=yes
> else
>   cross_compiling=no
> fi
> 
> AM_CONDITIONAL(CROSS_COMPILING, test $cross_compiling = yes)
> 
> if test $cross_compiling = yes; then
>   ...
> fi

This is the correct version. The namespace for conditionals is
completely separate from the namespace for shell variables, and
no assumption should be made about the implementation of conditionals.

Regards,
                                        Owen