Re: --without-x and 'make check' will create broken symlink to gnuplot_x11

[Ethan A M. <sf...@us...>]

On Thursday, 17 July, 2014 04:48:22 Jun T. wrote:
> 
> 2014/07/17 02:26, Ethan A Merritt <sf...@us...> wrote:
> 
> > Does anyone know what was the original intent of creating a symlink?
> 
> The following is just my guess; not tested on Linux with x11 terminal.
> I can test only on Mac now, but:
> 
> $ ./configure --prefix=$HOME --program-suffix='-5' --with-qt ...
> $ make
> 
> then gnuplot and gnuplot_qt are built in src/, and
> 
> $ make install
> 
> this will install gnuplot as $HOME/bin/gnuplot-5, and gnuplot_qt as
> $HOME/libexec/gnuplot/5.0/gnuplot_qt-5 (they are renamed when installed).
> But qt terminal doesn't work:
> 
> $ $HOME/bin/gnuplot-5
> gnuplot> set term qt
> gnuplot> plot sin(x)
> Could not start gnuplot_qt with path "$HOME/libexec/gnuplot/5.0/gnuplot_qt"
> 
> i.e., gnuplot-5 tries to start gnuplot_qt but in $HOME/libexec there is
> gnuplot_qt-5 but not gnuplot_qt (assuming I haven't installed gnuplot
> with --prefix=$HOME but without --program-suffix before).

That is the purpose of the environment variable GNUPLOT_DRIVER_DIR.

.../demo/Makefile sets this to GNUPLOT_DRIVER_DIR=$$bdir/../src
so that gnuplot_x11 and gnuplot_qt are correctly found in the build directory
rather than in the system install directory (since "make check" can be run
before installation).

	Ethan