add CV_RESULTS variable to retarget results directories

Created by: strichmo

Task Outcome

Provide support for a variable (CV_RESULTS) that can be provided on make command lines or in an environment that will retarget results directories if specified. This could have some utility when developing core-v-verif in corporate environments or other design environments that may predefine generated file locations outside the repository.

• Default results location

cv32e40p/sim/uvmt/xrun_results/hello-world/xrun-hello-world.log

• New results location if CV_RESULTS is defined

CV_RESULTS/xrun_results/hello-world/xrun-hello-world.log

Location Information

core-v-verif/mk

Completion Criteria

• Ensure that default behavior is unchanged
• Test applying the CV_RESULTS variable on a make command line
• Test applying the CV_RESULTS variable as an environment variable
• Test overriding a CV_RESULTS variable on the command line when already defined in an environment