Linking libraries translating from command line to Make

0
votes

I am trying to get the intel math kernel library (mkl) to run. There is a tool (https://software.intel.com/en-us/articles/intel-mkl-link-line-advisor) that prints the necessary, environment-dependent cmd commands to use it for C++ scripting. For me it says:

Use this link line: ${MKLROOT}/lib/libmkl_intel_lp64.a ${MKLROOT}/lib/libmkl_intel_thread.a ${MKLROOT}/lib/libmkl_core.a -liomp5 -lpthread -lm -ldl

Compiler options: -m64 -I${MKLROOT}/include

My goal is to write this in a CMake script. Where am I going wrong / what do I have to write to make this work?

cmake_minimum_required(VERSION 3.15)
project(PSD_Projections)

set(CMAKE_CXX_STANDARD 14)
set(MKL_DIR /opt/intel/mkl)

# Part for the linker line
# This seems to be somewhat okay
# However I can't figure out what to do about the other linker line arguments
find_library(LIB1 mkl_intel_lp64 ${MKL_DIR}/lib)
find_library(LIB2 mkl_intel_thread ${MKL_DIR}/lib)
find_library(LIB3 mkl_core ${MKL_DIR}/lib)
link_libraries(${LIB1} ${LIB2} ${LIB3})

# Part for the compiler options.
# ${MKL_DIR}/include is found and exists
# I don't know what to do about the -m64 
include_directories(${MKL_DIR}/include)

add_executable(PSD_Projections main.cpp)
1
c++librariesintel-mklcmake-language
Are you cross-compiling your application on a 32-bit host? If you're already on a 64-bit host then you don't need the -m64 flag. - Some programmer dude
As for the actual library files and how to link with them, use the target_link_libraries command. - Some programmer dude

1 Answers

2
votes

An example for sequential ILP64 version:

target_include_directories(PSD_Projections PUBLIC "${MKL_DIR}/include")
target_compile_definitions(PSD_Projections PUBLIC MKL_ILP64)
target_link_directories(PSD_Projections PUBLIC "${MKL_DIR}/lib/intel64")
target_link_libraries(PSD_Projections PUBLIC mkl_intel_ilp64 mkl_sequential mkl_core m dl)
target_link_options(PSD_Projections PUBLIC "-Wl,--no-as-needed")

It can easily be adjusted to your needs.

An example how to set C++ standard version and compiler options:

target_compile_features(PSD_Projections PUBLIC cxx_std_14)
target_compile_options(PSD_Projections PUBLIC -Wall -Wpedantic -Wextra -m64 -march=native)