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Fortran link to library not found [message #1840097]

Tue, 06 April 2021 18:27

Robert Lockwood

Messages: 45
Registered: October 2010
Location: Riverside, CA, USA

Member

I've been unable to discover how to tell the Fortran linker where the OpenMP library is. I've tried several settings using Project->Settings->MacOS Fortran Linker to set paths, with and without the shared library box checked, but they all fail. Here's a link result

/Library/Developer/CommandLineTools/usr/bin/make --no-print-directory main-build
Building target: Parallel
Invoking: MacOS X Fortran Linker
/usr/local/bin/gfortran -static-libgfortran -Wl,-dylib -o "Parallel"  ./par1.o   
Undefined symbols for architecture x86_64:
  "_GOMP_parallel", referenced from:
      _MAIN__ in par1.o
ld: symbol(s) not found for architecture x86_64

I'm using Eclipse Scientific Computing 2021-03 (4-19.0) on a MacBook Pro with up-to-date Big Sur.

Can someone please provide me with an example?

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Re: Fortran link to library not found [message #1840105 is a reply to message #1840097]

Tue, 06 April 2021 22:30

David Vavra

Messages: 1407
Registered: October 2012

Senior Member

Is GOMP installed?
If so, you need to tell the linker where to find it and use it.
https://gcc.gnu.org/projects/gomp/

[Updated on: Wed, 07 April 2021 05:43]

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Re: Fortran link to library not found [message #1840111 is a reply to message #1840105]

Wed, 07 April 2021 00:38

Robert Lockwood

Messages: 45
Registered: October 2010
Location: Riverside, CA, USA

Member

GOMP was installed but I re-installed it JIC.
My problem is that it's been so long since I used a compiled language that I forgot how to set library options -L and -l for ld so as a last resort used man and it worked! Thanks for the link to the OpenMP PDF.

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