Using MKL_DIRECT_CALL in C Applications

The following examples of code and link lines show how to activate direct calls to Intel MKL kernels in C applications:

• Include the mkl.h header file:

  #include "mkl.h" 
  int main(void) {
      
  // Call Intel MKL DGEMM 
      
  return 0;
  }
  

• For multi-threaded Intel MKL, compile with MKL_DIRECT_CALL preprocessor macro:

  icc –DMKL_DIRECT_CALL -std=c99 your_application.c -Wl,--start-group $(MKLROOT)/lib/intel64/libmkl_intel_lp64.a 
  $(MKLROOT)/lib/intel64/libmkl_core.a $(MKLROOT)/lib/intel64/libmkl_intel_thread.a -Wl,--end-group -lpthread –lm -openmp -I$(MKLROOT)/include

• To use Intel MKL in the sequential mode, compile with MKL_DIRECT_CALL_SEQ preprocessor macro:

  icc –DMKL_DIRECT_CALL_SEQ -std=c99 your_application.c -Wl,--start-group $(MKLROOT)/lib/intel64/libmkl_intel_lp64.a 
  $(MKLROOT)/lib/intel64/libmkl_core.a $(MKLROOT)/lib/intel64/libmkl_sequential.a -Wl,--end-group -lpthread –lm -I$(MKLROOT)/include