pgplot linking libraries problem

cantordust · 12-10-2012, 04:32 AM

Hello,

I am trying to install pgplot on a Fedora 17 system, with gfortran. I followed all the steps given on the pgplot website - , including the appropriate edits in the files drivers.list and makefile, after which it seemed to have been 'successfully' installed.

Initially, I could not run ./pgdemo1 (one of the examples given). I solved this by doing this:

Code:

LD_LIBRARY_PATH=/usr/local/lib
export LD_LIBRARY_PATH

I put the above in the ~/.bashrc file too. When I do this, I am able to run all the demos in the installation directory. However, when I try to run a fortran 90 program which calls pgplot subroutines, the linker is unable to find them. I get the following error message:

Code:

gfortran -o tryplot.e tryplot.f90
/tmp/ccNwjzsG.o: In function `MAIN__':
tryplot.f90:(.text+0xd2): undefined reference to `pgbeg_'
tryplot.f90:(.text+0xfc): undefined reference to `pgenv_'
tryplot.f90:(.text+0x126): undefined reference to `pglab_'
tryplot.f90:(.text+0x148): undefined reference to `pgpt_'
tryplot.f90:(.text+0x152): undefined reference to `pgend_'
collect2: error: ld returned 1 exit status

What am I missing?

I also tried to install using

Code:

yum install pgplot

, after first installing the non-free repositories, and I end up with the same problem.

Any help/suggestions will be greatly appreciated. I'm a newbie to linux and do not understand these structures (libraries and linking etc) well..

Thank you in advance

cantordust · 12-10-2012, 05:32 AM

I was able to resolve the above issue by adding the required libraries during compilation as below:

Code:

gfortran -L/usr/X11R6/lib -lX11 -L/usr/lib -lpgplot -o tryplot.e tryplot.f90

instead of simply

Code:

gfortran -o tryplot.e tryplot.f90

.

If you also use png libraries then you can use:

Code:

gfortran /usr/lib/libpng.so -L/usr/X11R6/lib -lX11 -L/usr/lib -lpgplot -o tryplot.e tryplot.f90