merge bitcoin#19916: allow user to specify DIR_FUZZ_SEED_CORPUS for cov_fuzz

Author: kwvg

.gitignore

@@ -123,6 +123,7 @@ total.coverage/
 fuzz.coverage/
 coverage_percent.txt
 /cov_tool_wrapper.sh
+qa-assets/
 
 #build tests
 linux-coverage-build

Makefile.am

@@ -171,6 +171,8 @@ LCOV_FILTER_PATTERN = \
 	-p "src/secp256k1" \
 	-p "depends"
 
+DIR_FUZZ_SEED_CORPUS ?= qa-assets/fuzz_seed_corpus
+
 $(COV_TOOL_WRAPPER):
 	@echo 'exec $(COV_TOOL) "$$@"' > $(COV_TOOL_WRAPPER)
 	@chmod +x $(COV_TOOL_WRAPPER)
@@ -183,7 +185,7 @@ baseline_filtered.info: baseline.info
 	$(LCOV) -a $@ $(LCOV_OPTS) -o $@
 
 fuzz.info: baseline_filtered.info
-	@TIMEOUT=15 test/fuzz/test_runner.py qa-assets/fuzz_seed_corpus -l DEBUG
+	@TIMEOUT=15 test/fuzz/test_runner.py $(DIR_FUZZ_SEED_CORPUS) -l DEBUG
 	$(LCOV) -c $(LCOV_OPTS) -d $(abs_builddir)/src --t fuzz-tests -o $@
 	$(LCOV) -z $(LCOV_OPTS) -d $(abs_builddir)/src