When building a shared library using the NAG Fortran compiler, cmake is
invoking
the compiler with the "-fPIC" option. This is wrong. The correct option
is "-PIC".
I've found I can get things to work if I add the following two lines to my
CMakeLists.txt
file (probably not the right way to fix things):
set(CMAKE_Fortran_COMPILE_OPTIONS_PIC "-PIC")
set(CMAKE_SHARED_LIBRARY_Fortran_FLAGS "-PIC")
Several questions (I'm *very* new to cmake, so apologies if they're stupid):
1) I've found the file Modules/Platform/Linux-NAG-Fortran.cmake. Is that
where
compiler-specific settings like this belong? And are the above two
lines the
correct thing to add to that file?
2) Is there a maintainer for the Fortran (esp. NAG) related module files?
I suspect
that there are other areas where cmake will not drive the NAG compiler
correctly.
3) Until this is fixed in cmake, I need to find a robust way of making this
work. the
problem with what I did above is that I only want to set the variables
if I'm using
the NAG compiler. Is there some cmake variable available that gives
the identity
of the Fortran compiler it identified against which I can test? Or can
my code
distribution include a "fixed" version of Linux-NAG-Fortran.cmake
(assuming it's the
culprit) that somehow gets used instead? What are the standard
strategies
in cases like this?
Thanks for your help!
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