cross-compiling with CMake

[Ronald Rahaman]

Hi all,

Does OpenMC v0.6.0 have support for cross-compilation environments?  If not, do you have any suggestions for setting up cross-compilation with Cmake?

Right now, when I try to compile on BG/Q, cmake is auto-detecting the wrong compiler (it's detecting the compiler for the login node).  I'm considering setting up some toolchains, as described here (http://www.cmake.org/Wiki/CMake_Cross_Compiling), but I don't have any experience with it and any suggestions would be appreciated.  

Thanks and best wishes,

Ron Rahaman

[Sterling Harper]

Greetings,

You can tell CMake which compiler you want to use by setting the "FC" environment variable.  For example, see http://mit-crpg.github.io/openmc/usersguide/install.html#compiling-with-mpi

Sterling

[Paul Romano]

Hi Ron,

I don't think anyone has tried cross-compilation environments in any serious effort. I did once make a feeble attempt to cross compile for Windows with mingw on a Linux machine -- it didn't work on the first try, and I didn't care that much so I gave up.

As Sterling suggested, you should be able to set the compiler explicitly using FC. That should solve your current woes on BG/Q, although I would consider that separate from a discussion of cross-compilation.

Paul

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[Ronald Rahaman]

Thanks, guys!  I will use Sterling's suggestion as a quick fix, and I will look into cross-compilation toolchains as a long-term solution.  Looks like this issue has been addressed for other projects here at ANL ( https://wiki.alcf.anl.gov/parts/index.php/Mira_Build_System_Software_Documentation ), so I should be able to hunt down some experts.