Important
Support for Intel’s C++ compiler hasn’t been updated or even confirmed for quite sometime. This document is most likely grossly out-of-date, but kept for historical reasons.
Using the Intel C++ compiler¶
Intel’s C++ compiler is said to generate faster code than gcc and is free for noncommerical use on Linux platforms. Available here:
Configuration¶
Specify the path to icc and icpc on the command line at cmake-time:
% CC=/opt/intel/cc/10.1.018/bin/icc CXX=/opt/intel/cc/10.1.018/bin/icpc cmake ../src
-- The C compiler identification is Intel
-- The CXX compiler identification is Intel
-- Check for working C compiler: /opt/intel/cc/10.1.018/bin/icc
-- Check for working C compiler: /opt/intel/cc/10.1.018/bin/icc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /opt/intel/cc/10.1.018/bin/icpc
-- Check for working CXX compiler: /opt/intel/cc/10.1.018/bin/icpc -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
Gotchas¶
__sync_fetch_and_add¶
See this thread:
for details on a link error involving undefined symbol __sync_fetch_and_add,
which is found in gcc 4.2 stl headers. The patch is in
cmake/tool-patches/common/I3/intel_compatibility.h.
libimf.so¶
If you see:
error while loading shared libraries: libimf.so: cannot open shared object file: No such file or directory
You need to add the intel compiler’s lib directory to your
LD_LIBRARY_PATH. If you do so be careful that you don’t do it in
such a way that you clobber the LD_LIBRARY_PATH set by the env-shell.sh
