Re: [Plplot-devel] OpenGL driver development

[chm <dev...@gm...>]

I was able to build the current plplot trunk
from svn on cygwin 1.7.7 with some hand-holding:

(1) First disable problem options and ones I don't
     think I needed to get started:

       cmake -DCMAKE_INSTALL_PREFIX=install -DENABLE_tk=OFF -DENABLE_tcl=OFF \
             -DCMAKE_VERBOSE_MAKEFILE=ON -DBUILD_TEST=ON -DENABLE_ada=OFF \
             -DENABLE_d=OFF -DENABLE_java=OFF -DENABLE_ocaml=OFF -DENABLE_octave=OFF \
             -DENABLE_cairo=OFF -DDEFAULT_NO_CAIRO_DEVICES=ON ../ 2>&1 | tee plplot-cmake-log.txt

(2) I had to add directories containing the cygXXX.dll files
     to the PATH in order for the build to complete.  cygwin,
     being a windows systems, follows windows rules for the
     shared library DLLs.  The key is that the DLL must be
     in the same directory or in the PATH to be found.  It also
     needs to be set as executable.  The directories with DLLs
     were:

        <build-dir>/bindings/c++
        <build-dir>/bindings/f77
        <build-dir>/bindings/f95
        <build-dir>/bindings/qt_gui

        <build-dir>/lib/csa
        <build-dir>/lib/nn
        <build-dir>/lib/qsastime

        <build-dir>/src

     If all the above were temporarily added to the PATH
     before the make, that should work ok.  These missing
     PATH directories typically showed in the tests, e.g.,

       cd buildcygwin/drivers && ./test-drv-info.exe xwin


(3) After the install, the following two (at least)
     directories below need to be added the PATH for
     the plplot examples to run:

       <install-dir>/bin
       <install-dir>/lib/plplot5.9.7/driversd

(4) Finally, there were some problems with cairo and wingcc
     which appear to come from the cmake process selecting
     a mixture of unix build options and win32 ones.  For
     example: I don't think the unix flavor of the cairo
     libraries could possible have #include <windows.h> to
     work yet the cairo build on cygwin tries just that.
     Similarly, the wingcc driver got built but it hang
     on running the example (it should be able to be ported
     to cygwin).

     The secret for cygwin cmake and autoconf detection is
     to make sure you don't check for win32 stuff if you
     have decided to do a unix build.  Also, the compile
     and link option decisions need to allow for the fact
     that although a cygwin system does have a windows.h
     file, the build should be unix-ish.

Now that I've got the plplot building, I'm going to
see if I can get it to talk to perl/PDL.  I think
that would be easier if I did not use dynamic drivers
to reduce possible issues that could arise.

Is there some way to build a static plplot with all the
drivers linked in statically as well?  That should
simplify the next steps.

Thanks in advance,
Chris