Pgplot compilation : a workaround

[jcldc]

Since gcc 10.x Pgplot does not compile. The workaround is just to add compilation flag -fallow-argument-mismatch to the pgplot makefile and the it compiles flawlessly. It would be necessary to patch pgplot makefile during nemo configuration/installation

[teuben]

Is this the 'mknemo pgplot' method? I don't recall i needed flags with either gcc 12 or 11

On Sun, Nov 27, 2022, 13:06 Jean-Charles Lambert @.***> wrote:

Since gcc 10.x Pgplot does not compile. The workaround is just to add compilation flag -fallow-argument-mismatch to the pgplot makefile and the it compiles flawlessly. It would be necessary to patch pgplot makefile during nemo configuration/installation

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[jcldc]

well... I am confused.... I was working on a old branch and pgplot was not compiling without this flag..... should not work on sunday...

[teuben]

I do remember I needed this flag in a few fortran codes, sellwood maybe, and also the io_nemo Makefile now has:

  FFLAGS = -O -fno-second-underscore -fallow-argument-mismatch

working on Sunday, as long as it's in moderation, can be entertaining

[jcldc]

Ok, on monday my brain works better :)

Well, I confirm that this flag -fallow-argument-mismatch is actually mandatory, since gcc 10.x, IF gif driver is requested.

The following pgplot installation :

$NEMO/src/scripts/pgplot.install png=0 gif=1

fails without this flag added into $NEMO/lib/makefile

And by default, https://teuben.github.io/nemo/install_nemo script has by default set gif =1, then pgplot fails to compile. It should be necessary to set gif=0 in this script or/and to add -fallow-argument-mismatch to the pgplot makefile (for gcc >= 10.x)

[teuben]

I always use PNG now, but I guess for making animated GIF's there might be a reason to keep this. I will add this to the configure procedure

But I should note that this particular install_nemo script is deprecated in favor of the install_nemo.sh counter part. More cleanly written. The old csh version is - shall we say - organically grown and is messy to look at.

[jcldc]

The pb with PNG is that the libpng-devel package needs to be installed on the server. Then if it's not installed what happens with pgplot installation/compilation ?

[teuben]

it should fail. Somehow I seem to have it by default in ubuntu, I didn't put it in my default "packages to install" in $NEMO/src/scripts/linux/ubuntu20.04. If you have own favorite OS, you should add your packages to a list in that directory, it will be useful for me too.

[jcldc]

I am encountering all these issues because I am building nemo inside manylinux_2xxx docker images which are centos base distributions. (the purpose is too build python-unsio and python-unsiotools and upload to pypi.org)

[jcldc]

it should fail. Somehow I seem to have it by default in ubuntu, I didn't put it in my default "packages to install" in $NEMO/src/scripts/linux/ubuntu20.04. If you have own favorite OS, you should add your packages to a list in that directory, it will be useful for me too.

it should be good to check if png package is present

[teuben]

btw, are you are we need to add it to makedefs, and not to the pgplot install script. They have their own peculiar method to set compiler specific flags.

[jcldc]

Do you mean compilation flag for pgplot ? Well, it might be a good idea to put it in $NEMOLIB/makedefs but during pgplot installation, the file $NEMOLIB/makefile is created and the pgplot's compilation is based on it... Entry FFLAGC=-u -Wall -fPIC -O should be modified with something like FFLAGC=-u -Wall -fPIC -O ${NEMOFORTFLAGS} and an include of makefedfs (with NEMOFORTFLAGS set) should be present in $NEMOLIB/makefile

[teuben]

Looking at the code in $NEMO/local/pgplot (where "mknemo pgplot" dumps the code) I see that in

   $NEMO/local/pgplot/sys_linux/gfortran_gcc.conf

one needs to modify

   FFLAGC="-u -Wall -fPIC -O -fallow-argument-mismatch"

but my programs then coredump'd when using the /gif driver. I forgot to add the int8=1 fix to the pgplot build script. After this i got good gif files.

The int8=1 changes

  -      INTEGER*4 PIXMAP, WORK
  +      INTEGER*8 PIXMAP, WORK

in gidriv, ppdriv and wddriv

[teuben]

I'm also willing to make gif=0 the default, but that csh script has been deprecated. The new install_nemo.sh script already had gif=0 by default, if you use the yapp=pglocal (which uses our source code). But that new one also has png=1 as default, so you need the png development library. So what's better for your docker usage?

\

[jcldc]

The better would be to have no png and no gif. So far, I install nemo like this (from Dockerfile), see : https://gitlab.lam.fr/infrastructure/unsio/-/blob/master/CI/docker/manylinux2014/Dockerfile

wget https://teuben.github.io/nemo/install_nemo &&\
chmod +x install_nemo                 &&\
export NO_ARCH_NATIVE=1         &&\
./install_nemo png=0 gif=0

[teuben]

thanks, it's good to see such a dockerfile so I can see how you do this.

If you don't really care about the drivers in pgplot and just want a compilation, you should use the yapp=ps driver. Much easier and doesn't need another library. Even yapp=null should work. I can also "advertise" the install_nemo.sh script, try

 docs/install_nemo.sh -h

to see the options. I would like to argue you can now do it in two steps. Or does dockerfile not support the prefix?

  wget   https://teuben.github.io/nemo/install_nemo.sh   &&\
  NO_ARCH_NATIVE=1   bash   ./install_nemo.sh   yapp=ps

some of the options in install_nemo haven't been ported to install_nemo.sh, but I'll add some if you argue in their favor :-)

[jcldc]

OK I will try yapp=ps

[teuben]

I think we can close this issue, barring hearing from you if you're happy with using the bash script instead (and with yapp=ps)

[jcldc]

Sure, yes you can close it. THANKS for your help !