CMake Intel oneMKL example with LAPACK

CMakeLists.txt

cmake_minimum_required(VERSION 3.19)

project(intel_mkl LANGUAGES C Fortran)

message(STATUS "ENV{MKLROOT}: $ENV{MKLROOT}")

# variables set before find_package(MKL)
# https://www.intel.com/content/www/us/en/docs/onemkl/developer-guide-linux/2023-2/cmake-config-for-onemkl.html

# default: lp64
# set(MKL_INTERFACE "lp64")
# set(MKL_INTERFACE "ilp64")

# set(ENABLE_BLAS95 true)
# set(ENABLE_LAPACK95 true)

# MKL_THREADING default: "intel_thread" which is Intel OpenMP
# set(MKL_THREADING "tbb_thread")

# default: dynamic
# set(MKL_LINK "static")

find_package(MKL CONFIG REQUIRED)

enable_testing()

add_executable(mkl_version mkl_version.c)
target_link_libraries(mkl_version PRIVATE MKL::MKL)
add_test(NAME mkl_version COMMAND mkl_version)

add_executable(snrm_f snrm.f90)
target_link_libraries(snrm_f PRIVATE MKL::MKL)
add_test(NAME snrm_f COMMAND snrm_f)

file(GENERATE OUTPUT .gitignore CONTENT "*")

mkl_version.c

// https://www.intel.com/content/www/us/en/docs/onemkl/developer-guide-linux/2023-2/cmake-config-for-onemkl.html

#include <stdio.h>
#include "mkl.h"

int main(void)
{
    MKLVersion mkl_version;
    mkl_get_version(&mkl_version);

    printf("oneMKL %d.%d\n", mkl_version.MajorVersion, mkl_version.UpdateVersion);

    return 0;
}

snrm.f90

program check_snrm
use, intrinsic :: iso_fortran_env, only : real32
implicit none
real(real32), external :: snrm2
print *, snrm2(1, [0._real32], 1)
end program