Start a readme

Author: ye-luo

README.md

@@ -0,0 +1,13 @@
+# A collection of OpenMP tests
+
+mkdir build_gcc_omp
+cd build_gcc_omp
+cmake -DCMAKE_CXX_COMPILER=g++ -DCMAKE_Fortran_COMPILER=gfortran \
+      -DCMAKE_CXX_FLAGS=-fopenmp -DCMAKE_Fortran_FLAGS=-fopenmp \
+      ..
+make -k -j 16
+ctest
+
+###
+OpenMP offload compiler options
+https://github.com/ye-luo/openmp-target/wiki/OpenMP-offload-compilers