The tests by default will execute gprbuild with -q for quiet, this can make
  debugging difficult. Provide a mechanism to customise how the tests execute
  grpbuild from the Port Makefile.

--- tests/Makefile.orig	2026-07-01 01:20:10 UTC
+++ tests/Makefile
@@ -81,7 +81,7 @@ test_multiple_xsd:
 test_multiple_xsd:
 	@echo "multiple xsd"
 	@cd schema/multiple_xsd; \
-		gprbuild -q -Pdefault.gpr; \
+		gprbuild %%TESTS_GPRBUILD_ARGS%% -Pdefault.gpr; \
 		./validate > $(RESULTS)/multiple_xsd.out; \
 		cp $(RESULTS)/multiple_xsd.out $(RESULTS)/multiple_xsd.diff; \
 		cat $(RESULTS)/multiple_xsd.diff
@@ -89,7 +89,7 @@ test_examples_dom:
 test_examples_dom:
 	@echo "test examples dom"
 	@cd ../docs/dom; \
-		gprbuild -q -p -Pdefault.gpr 2> $(RESULTS)/domexample.out; \
+		gprbuild %%TESTS_GPRBUILD_ARGS%% -p -Pdefault.gpr 2> $(RESULTS)/domexample.out; \
 		./domexample >> $(RESULTS)/domexample.out; \
 		cp $(RESULTS)/domexample.out $(RESULTS)/domexample.diff; \
 		cat $(RESULTS)/domexample.diff; \
@@ -104,7 +104,7 @@ test_examples_sax:
 test_examples_sax:
 	@echo "test examples sax"
 	@cd ../docs/sax; \
-		gprbuild -q -p -Pdefault.gpr 2> $(RESULTS)/saxexample_main.out; \
+		gprbuild %%TESTS_GPRBUILD_ARGS%% -p -Pdefault.gpr 2> $(RESULTS)/saxexample_main.out; \
 		./saxexample_main >> $(RESULTS)/saxexample_main.out; \
 		diff -b $(EXAMPLE_EXPECTED)/saxexample_main.expected $(RESULTS)/saxexample_main.out > $(RESULTS)/saxexample_main.diff; \
 		if test -s $(RESULTS)/saxexample_main.diff; then \
@@ -114,7 +114,7 @@ test_examples_schema:
 test_examples_schema:
 	@echo "test examples schema"
 	@cd ../docs/schema; \
-		gprbuild -q -p -Pdefault.gpr 2> $(RESULTS)/schemaexample.out; \
+		gprbuild %%TESTS_GPRBUILD_ARGS%% -p -Pdefault.gpr 2> $(RESULTS)/schemaexample.out; \
 		./schemaexample >> $(RESULTS)/schemaexample.out; \
 		cp $(RESULTS)/schemaexample.out $(RESULTS)/schemaexample.diff; \
 		cat $(RESULTS)/schemaexample.diff