fortran compiler for scipy

[seandepagnier]

I noticed gcc has fortran (and many other languages) enabled but I cannot find "gfortran" and scipy fails to find fortran compiler while building.

What is the best way to get fortran (or scipy) on pi core?

[Juanito]

If a gfortran extension doesn’t exist, you’ll need to compile it with gcc.

[seandepagnier]

Could you point me to the build scripts for gcc?  I'm on picore 9, I can only find scripts for picore 4.

[Juanito]

If you enter "gcc -v", it should tell you how it was configured - then it's just a matter of adding fortran to --enable-languages=

[Rich]

Hi seandepagnier
Are these of any help:
http://tinycorelinux.net/7.x/x86/tcz/src/gfortran/
http://tinycorelinux.net/10.x/x86/tcz/src/gfortran/

[seandepagnier]

I will build gcc from source now, but I am interested to see the build script for gcc.tcz.

@rich
I looked at the x86 version but it does not create a tcz.   What am I missing?

gcc -v shows:   "--enable-languages=c,c++,fortran,go"  for pi-core but obviously no fortran.  Was it split into a separate package?

[Rich]

Hi seandepagnier

... I looked at the x86 version but it does not create a tcz.   What am I missing? ...

Creating a  .tcz  involves packaging the created files using  mksquashfs.  The first thing you should read is:
http://wiki.tinycorelinux.net/wiki:creating_extensions

[seandepagnier]

Thank you, I know how squashfs is used, but I would like to see the script used to build gcc.tcz so it can be easily reproduced and I can see how fortran was carved out so I could make a package for just the missing fortran part.


I did compile gcc with gfortran but "make install" to ram runs out of disk space. 

[Rich]

Hi seandepagnier

... I did compile gcc with gfortran but "make install" to ram runs out of disk space.

Then try pointing it to some persistent storage.Maybe something like:

Code: [Select]

mkdir /mnt/sda1/package
make DESTDIR=/mnt/sda1/package install

[Juanito]

You can look at the following to see what needs packaging:

http://www.tinycorelinux.net/10.x/x86/tcz/gfortran.tcz.list
http://www.tinycorelinux.net/10.x/x86/tcz/gfortran-lib.tcz.list

[seandepagnier]

Hi seandepagnier

... I did compile gcc with gfortran but "make install" to ram runs out of disk space.

Then try pointing it to some persistent storage.Maybe something like:

Code: [Select]

mkdir /mnt/sda1/package
make DESTDIR=/mnt/sda1/package install

I did this and unfortunately it lead to more errors because the c++ library is not found with the new compiler.   I think more hints to include directories are needed somehow.  Unfortunately scipy uses both c++ and fortran.

After changing PATH back and forth after each failure after a few times I got scipy to build but on loading it fails with unresolved externals.

I am trying again with a different gcc version and hopefully it will work.    It's difficult to build on tinycore because of the limited ram...   is there a way to have a larger ramdisk by adding more swap?   I already need to add a lot of swap to make this build but it's not giving me more space in /

[Rich]

Hi seandepagnier

...   It's difficult to build on tinycore because of the limited ram...   is there a way to have a larger ramdisk by adding more swap?   I already need to add a lot of swap to make this build but it's not giving me more space in /

I should have also suggested you download and build the source in persistent storage. That should leave a lot more RAM available
for the build.

[Juanito]

I am trying again with a different gcc version and hopefully it will work.

I think that, in order to avoid strange problems, you would need to compile gfortran with the same version of gcc in use with piCore.