Re: [Plplot-general] Working on PLplot 5.14 and gtk-fortran interfacing...

[Vincent M. <vin...@po...>]

Hi Alan,

I have made some progress concerning PLplot & gtk-fortran:

Le 04/03/2019 à 22:05, Alan W. Irwin a écrit :
> This is just a comment in passing about the installation prefix you
> have chosen by default here.  Instead, I suggest you specify the cmake
> option -DCMAKE_INSTALL_PREFIX=<whatever install prefix you like>.  The
> prefix you chose instead by default was /usr/local.  That is under
> control by the root account which is why you had to install as root.
> But if you use a unique install prefix under user account control
> instead, you don't have to install as the root account, and removing
> that entire prefix directory again for further installation tries is
> so easy compared to removing all the PLplot bits and pieces in
> /usr/local.

I have reverted my virtual machine to the state before building PLplot 
and built it with a -DCMAKE_INSTALL_PREFIX:

osboxes@osboxes:~$ mkdir build_pl && cd build_pl
osboxes@osboxes:~/build_pl$ cmake -D CMAKE_INSTALL_PREFIX=/home/osboxes/myplplot ../plplot-5.14.0 >& cmake.out
osboxes@osboxes:~/build_pl$ make VERBOSE=1 >& make.out
osboxes@osboxes:~/build_pl$ make VERBOSE=1 install >& make_install.out
osboxes@osboxes:~/build_pl$ cd /home/osboxes/myplplot/share/plplot5.14.0/examples/fortran/
osboxes@osboxes:~/myplplot/share/plplot5.14.0/examples/fortran$ make
osboxes@osboxes:~/myplplot/share/plplot5.14.0/examples/fortran$ ./x08f

> find_package(plplot) (which you use below) just works for me here when
> I use it to build the installed examples that are linked with the
> installed PLplot libraries.  Did you forget to set the environment
> variable CMAKE_PREFIX_PATH to your PLplot prefix (/usr/local for now,
> see above) so that the installed version of PLplot can be found?

First I tried this which had the advantage to give me some interesting 
messages:

osboxes@osboxes:~/gtk-fortran/build$ cmake -D CMAKE_BUILD_TYPE=debug ..
-- Compiler: GNU 8.3.0 /usr/bin/f95
-- Build type is: debug
-- Compilation flags: -g -pthread -Wall -pedantic -std=f2008 -Wtabs 
-fcheck=all -fbacktrace -Wno-unused-dummy-argument
-- Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE)
CMake Warning at CMakeLists.txt:143 (find_package):
By not providing "Findplplot.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "plplot", but
CMake did not find one.

Could not find a package configuration file provided by "plplot" with any
of the following names:

plplotConfig.cmake
plplot-config.cmake

Add the installation prefix of "plplot" to CMAKE_PREFIX_PATH or set
"plplot_DIR" to a directory containing one of the above files. If "plplot"
provides a separate development package or SDK, be sure it has been
installed.

-- PLPLOT not found: PLPLOT integration and examples will not be built
-- Configuring done
-- Generating done
-- Build files have been written to: /home/osboxes/gtk-fortran/build
osboxes@osboxes:~/gtk-fortran/build$

Then I tried, as you suggested:

osboxes@osboxes:~/gtk-fortran/build$ cmake -D CMAKE_BUILD_TYPE=debug -D 
CMAKE_PREFIX_PATH=/home/osboxes/myplplot ..
-- Compiler: GNU 8.3.0 /usr/bin/f95
-- Build type is: debug
-- Compilation flags: -g -pthread -Wall -pedantic -std=f2008 -Wtabs 
-fcheck=all -fbacktrace -Wno-unused-dummy-argument
-- Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE)
-- PLPLOT not found: PLPLOT integration and examples will not be built
-- Configuring done
-- Generating done
-- Build files have been written to: /home/osboxes/gtk-fortran/build
osboxes@osboxes:~/gtk-fortran/build$

I have also tried without success:

osboxes@osboxes:~/gtk-fortran/build$ cmake -D CMAKE_BUILD_TYPE=debug -D 
plplot_DIR=/home/osboxes/myplplot/lib/cmake/plplot ..

After some hard fighting, I have just realized that CMake variables are 
case sensitive (but not CMake commands) ! With PLplot<=5.10 we were 
using in gtk-fortran the PLPLOT_FOUND variable. So I have written that 
piece of code:

   find_package(plplot)

   message(STATUS "PLPLOT_FOUND : ${PLPLOT_FOUND}")
   message(STATUS "PLplot_FOUND : ${PLplot_FOUND}")
   message(STATUS "plplot_FOUND : ${plplot_FOUND}")

if(plplot_FOUND)
     message(STATUS "plplot_LIBRARIES : ${plplot_LIBRARIES}")
     message(STATUS "plplot_INCLUDE_DIR : ${plplot_INCLUDE_DIR}")
     message(STATUS "plplot_MODULE_DIR : ${plplot_MODULE_DIR}")
     message(STATUS "PLPLOT_LIBRARIES : ${PLPLOT_LIBRARIES}")
     message(STATUS "PLPLOT_INCLUDE_DIR : ${PLPLOT_INCLUDE_DIR}")
     message(STATUS "PLPLOT_MODULE_DIR : ${PLPLOT_MODULE_DIR}")
     message(STATUS "PLplot_LIBRARIES : ${PLplot_LIBRARIES}")
     message(STATUS "PLplot_INCLUDE_DIR : ${PLplot_INCLUDE_DIR}")
     message(STATUS "PLplot_MODULE_DIR : ${PLplot_MODULE_DIR}")

Which yields:

osboxes@osboxes:~/gtk-fortran/build$ cmake -D CMAKE_BUILD_TYPE=debug -D 
CMAKE_PREFIX_PATH=/home/osboxes/myplplot ..

....

-- PLPLOT_FOUND :
-- PLplot_FOUND :
-- plplot_FOUND : 1
-- plplot_LIBRARIES :
-- plplot_INCLUDE_DIR :
-- plplot_MODULE_DIR :
-- PLPLOT_LIBRARIES :
-- PLPLOT_INCLUDE_DIR :
-- PLPLOT_MODULE_DIR :
-- PLplot_LIBRARIES :
-- PLplot_INCLUDE_DIR : PLplot_INCLUDE_DIR-NOTFOUND
-- PLplot_MODULE_DIR :

....
osboxes@osboxes:~/gtk-fortran/build$

> Once you have found the installed PLplot (see comment above), I am not
> sure the above method will work anymore. 
By now, I obtain the following errors when building our gtk-fortran 
PLplot examples:

[ 95%] Building Fortran object 
plplot/CMakeFiles/hl_plplot30e.dir/hl_plplot30e.f90.o
/home/osboxes/gtk-fortran/plplot/hl_plplot30e.f90:49:6:

    use plplot, PI => PL_PI
       1
Fatal Error: Can't open module file ‘plplot.mod’ for reading at (1): No 
such file or directory
compilation terminated.
Error copying Fortran module "plplot/handlers_ex30.mod". Tried 
"plplot/HANDLERS_EX30.mod" and "plplot/handlers_ex30.mod".
Error copying Fortran module "plplot/plplot_code_ex30.mod".  Tried 
"plplot/PLPLOT_CODE_EX30.mod" and "plplot/plplot_code_ex30.mod".
[ 95%] Linking Fortran executable hl_plplot30e
f95: error: CMakeFiles/hl_plplot30e.dir/hl_plplot30e.f90.o: No such file 
or directory
[ 95%] Built target hl_plplot30e

> Instead, I suggest you
> follow the CMake logic (for the case when CORE_BUILD is false) in
> $PLPLOT_PREFIX/share/plplot5.14.0/examples/CMakeLists.txt (our
> principal CMakeLists.txt file for the installed examples);
> $PLPLOT_PREFIX/share/plplot5.14.0/examples/cmake/modules/plplot_configure.cmake 
>
> (a configured file that contains definitions for many useful CMake
> variables); and primarily
> $PLPLOT_PREFIX/share/plplot5.14.0/examples/fortran/CMakeLists.txt
> (which is used to build our fortran examples that are linked against
> the installed PLplot) to build your Fortran source against PLplot.
>
> Of course, if you have any trouble following the CMake logic in the 
> above 3 files,
> please ask again here.

OK, I will read those files.

Just a question: could it be helpful to copy 
plplot-5.14.0/cmake/FindPLplot.cmake into our gtk-fortran/cmake 
directory ? For the previous PLplot versions, there was a 
FindPlplotF95.cmake file in it.

Thanks for your help,

Vincent