Dear all,
I have read the following posts on Intel's compiler version 19.0.5 on macOS
Catalina 10.15.1:
-
https://groups.google.com/forum/#!searchin/dealii/intel$20compiler|sort:date/dealii/mmljxW1T4QQ/wOTR9SmiBgAJ
- https://github.com/dealii/dealii/issues/8791
Now I can complete the CMake phase, but compilation fails with a linker
error with std::string:
[ 1%] Linking CXX executable ../../bin/expand_instantiations
Undefined symbols for architecture x86_64:
"__ZNKSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE4findEPKcm",
referenced from:
__Z15read_whole_fileRNSt3__113basic_istreamIcNS_11char_traitsIcEEEE
in expand_instantiations.cc.o
__Z15remove_commentsNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEE
in expand_instantiations.cc.o
In my installation, I have PETSc, SLEPc, Intel's TBB, disabled C++17, and I
am compiling in release mode. The linker call is the following, be aware
that DEAL_II_SETUP_DEFAULT_COMPILER is set to ON:
/opt/intel/bin/icpc -Wl,-search_paths_first
-Wl,-headerpad_max_install_names -shared-intel -qopenmp
CMakeFiles/expand_instantiations_exe.dir/expand_instantiations.cc.o -o
../../bin/expand_instantiations
PETSc and SLEPc use Intel's MKL, and of course, Intel's compilers. Has
anyone encountered a similar problem?
One little doubt in addition to that: I'd like to set -Ofast, but setting
that with DEAL_II_CXX_FLAGS_RELEASE (which I use to set some tuning like
SIMD optimizations) goes in conflict with the default -O2 set by the script.
Is there a "correct" way of specifying the Release optimization level in
the Deal.II CMake scripts?
Thanks for any suggestion!
Franco
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