Installing Freefem on Ubuntu 20.04

FreeFEM installation
1

I’m installing freefem on a new ubuntu laptop, following the instructions at Installation guide

Everything is OK until I am installing petsci. When I do

make petsc-slepc

I get the error:

cp: cannot create regular file ‘/usr/local/ff-petsc/r/lib/libtet.a’: Permission denied

make: *** [Makefile:234: petsc-3.17.0/tag-conf-real] Error 1

Can someone help?

2

You need to to do some thing like

sudo chown -R  $USER /usr/local/ff-petsc

or compile freefem++ under sudo ,
if you was no sudo privilege reconfigure in place where you have access.like :

./configure --prefix=$HOME/mycode .....
3

Frederic, thanks for the advice.

I have sudo and did

sudo chown -R $USER /usr/local/ff-petsc

and this worked perfectly. So have installed PetSc-SlepSc successfully.

Now I have another problem at step 7 of the Installation Guide for Ubuntu: ``Build your FreeFEM library and executable’’

The output is below: I did run 3rdparty/getall before I ran these commands

ivan@ivan-XPS-9320:~/FreeFem-sources$ make -j

bash: syntax error near unexpected token `newline’

ivan@ivan-XPS-9320:~/FreeFem-sources$ make -j check

bash: nbProcs: No such file or directory

Thanks and best wishes. Ivan

4

Frederic, thanks for the advice.

I have sudo and did

sudo chown -R $USER /usr/local/ff-petsc

and this worked perfectly. So have installed PetSc-SlepSc successfully.

Now I have another problem at step 7 of the Installation Guide for Ubuntu: ``Build your FreeFEM library and executable’’

The output is below: I did run 3rdparty/getall before I ran these commands

ivan@ivan-XPS-9320:~/FreeFem-sources$ make -j

bash: syntax error near unexpected token `newline’

ivan@ivan-XPS-9320:~/FreeFem-sources$ make -j check

bash: nbProcs: No such file or directory

Thanks and best wishes. Ivan

5

Yes have after compiled Petsc and Slepc to ré configure
So do
./reconfigure
make -j 10

6

OK
I have done

./reconfigure
make-j 10

and this has run successfully. Now I am at step 8

make install

I run this and get errors at the very end:

make[3]: Entering directory ‘/home/ivan/FreeFem-sources/src/nw’
/usr/bin/mkdir -p ‘/usr/local/bin’
/usr/bin/install -c FreeFem++ FreeFem+±nw ffglut ‘/usr/local/bin’
/usr/bin/install: cannot remove ‘/usr/local/bin/FreeFem++’: Permission denied
/usr/bin/install: cannot remove ‘/usr/local/bin/FreeFem+±nw’: Permission denied
/usr/bin/install: cannot remove ‘/usr/local/bin/ffglut’: Permission denied
make[3]: *** [Makefile:594: install-binPROGRAMS] Error 1
make[3]: Leaving directory ‘/home/ivan/FreeFem-sources/src/nw’
make[2]: *** [Makefile:850: install-am] Error 2
make[2]: Leaving directory ‘/home/ivan/FreeFem-sources/src/nw’
make[1]: *** [Makefile:549: install-recursive] Error 1
make[1]: Leaving directory ‘/home/ivan/FreeFem-sources/src’
make: *** [Makefile:800: install-recursive] Error 1
ivan@ivan-XPS-9320:~/FreeFem-sources$

You do say that it’s not necessary to run make install, but if I call Freefem from the command line I get the error:

ivan@ivan-XPS-9320:~/Dropbox/computing/freefem_code$ FreeFem++ Laplace.edp
FreeFem++: error while loading shared libraries: libgfortran.so.4: cannot open shared object file: No such file or directory