[CMake] Supporting the Intel Compiler -- building static libraries

[Blezek, Daniel J., Ph.D.]

Hi all,

  We're using the Intel compiler for some of our builds of ITK.  The
"-fast" option tries to statically link.  So I thought I'd build Insight
statically.  The problem occurred when I tried to use the static
libraries generated by "/usr/bin/ar", and the symbols could not be
found.  Turns out that the Intel compiler requires you to use their
version of ar, namely xiar.

  I tried all the obvious things like changing "CMAKE_AR" in my cache
file, defining an AR environment variable, a -DCMAKE_AR=xiar to CMake,
etc.  Turns out that the value is cached in
CMakeFiles/CMakeCXXCompiler.cmake, but no good way to change it (the
CMakeCXXCompiler.cmake overrides CMakeCache.txt) short of editing the
file (which is what I ended up doing).

  Could the CMake developers provide an easy way to override the
CMAKE_AR command to make linking statically with the Intel compiler
straightforward?

Thanks much,
-dan

Daniel Blezek, PhD
Medical Imaging Informatics Innovation Center
Enterprise Imaging Systems Unit

P 127 or (77) 8 8886
T 507 538 8886
E blezek.daniel at mayo.edu

Mayo Clinic
200 First St. S.W.
Harwick SL-44
Rochester, MN 55905
mayoclinic.org

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