Linking Elmer solver with OpenCalphad

[serge_13]

Thank you, I'll try be familar with it. Need some time.

Serge.

[annier]

Hi Serge,

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$gfortran -o tqex1 TQ1-crfe.F90 liboctq.o liboceq.a 

How can we make TQ1-crfe.F90 equivalent to a shared object library of Elmer so that it can be compiled by elmerf90 compiler?

Yours Sincerely,
Anil Kunwar

[annier]

Hi Serge,
I replaced TQ1-crfe.F90 with OCWrapper.F90(having the template of User Defined Function of Elmer but contents of TQ1-crfe.F90) and compiled with elmerf90 linker to produce the following error:

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$elmerf90 -o OCwrapper.so OCwrapper.F90 liboctq.o liboceq.a 
/usr/bin/f95 -o OCwrapper.so OCwrapper.F90 liboctq.o liboceq.a -fopenmp -DCONTIG=,CONTIGUOUS -DHAVE_EXECUTECOMMANDLINE -DUSE_ISO_C_BINDINGS -DUSE_ARPACK -O2 -g -DNDEBUG -fPIC -shared -I/home/ma-haitao/elmer8/install/share/elmersolver/include -L/home/ma-haitao/elmer8/install/lib/elmersolver -shared -lelmersolver 
/usr/bin/ld: liboceq.a(metlib3.o): relocation R_X86_64_32S against `__metlib_MOD_tophlp' can not be used when making a shared object; recompile with -fPIC
liboceq.a: error adding symbols: Bad value
collect2: error: ld returned 1 exit status

What has to be done here to solve the error?

Yours Sincerely,
Anil Kunwar

[serge_13]

i) Try to compile all sources strightly to OCWrapper.so without intermediate library(s) *.a . It's very interesting, but the library liboceq.a includes the name '__general_thermodynamic_package_MOD_gx'. I have found it by file viewer ...

W.b.r.
Serge.

[serge_13]

Try http://stackoverflow.com/questions/1976 ... king-error

[annier]

Hi Serge,
Thank you for your suggestions.
1. I prepared the shared object library of opencalphad (liboceq.so) as following:

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$gfortran -shared -fPIC -o liboceq.so metlib3.F90 lukasnum.F90 gtp3.F90 matsmin.F90 lmdif1lib.F90

.
2. Then i compiled the libraries with OCWrapper.F90 :

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$gfortran -c liboctq.F90

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$elmerf90 -o OCwrapper.so OCwrapper.F90 -loceq -loctq

This produced the following error log:

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 elmerf90 -o OCwrapper.so OCwrapper.F90  -loceq -loctq
/usr/bin/f95 -o OCwrapper.so OCwrapper.F90  -loceq -loctq -fopenmp -DCONTIG=,CONTIGUOUS -DHAVE_EXECUTECOMMANDLINE -DUSE_ISO_C_BINDINGS -DUSE_ARPACK -O2 -g -DNDEBUG -fPIC -shared -I/home/username/elmer8/install/share/elmersolver/include -L/home/username/elmer8/install/lib/elmersolver -shared -lelmersolver 
/usr/bin/ld: cannot find  -loceq
/usr/bin/ld: cannot find -loctq
collect2: error: ld returned 1 exit status

Yours Sincerely,
Anil Kunwar

[serge_13]

What path for linked liboceq.so ? Here must be two files at least : *.so, and *.a (or *.la) . Control date and time of these.
You need to point to *.a or *.la file path via -L instruction. The -l instruction goes after -L only !!!

For example:
-L/home/username/elmer8/install/lib/elmersolver -shared -lelmersolver . Here -lelmersolver points to small 'import' library file name. Find it to understand the idea of linking for shared.

Serge.

[annier]

Hi Serge,
I was busy in other things and could not follow this work recently. I need to learn more on this.
Will follow the example from OpenPhase software. Yes the path is very important in this context.
from our discussion, i have learnt that for linking this OpenCalphad software with Elmer, we need to use shared object libraries (dynamic libraries) instead of static libraries.
I need more efforts to learn all these stuffs.
cheers.

Yours Sincerely,
Anil Kunwar

[annier]

Hi,
Tutorial on making a makefile:
1. http://www.cs.colby.edu/maxwell/courses ... maketutor/
2. https://users.soe.ucsc.edu/~dongwook/wp ... flags.html
3. gfortran - linux man page
4. https://trac.version.fz-juelich.de/SMMP ... order=date
Yours Sincerely,
Anil Kunwar