Put unit tests back in old build system for now

tests/unit/libutil/local.mk

@@ -0,0 +1,37 @@
+check: libutil-tests_RUN
+
+programs += libutil-tests
+
+libutil-tests_NAME = libnixutil-tests
+
+libutil-tests_ENV := _NIX_TEST_UNIT_DATA=$(d)/data GTEST_OUTPUT=xml:$$testresults/libutil-tests.xml
+
+libutil-tests_DIR := $(d)
+
+ifeq ($(INSTALL_UNIT_TESTS), yes)
+  libutil-tests_INSTALL_DIR := $(checkbindir)
+else
+  libutil-tests_INSTALL_DIR :=
+endif
+
+libutil-tests_SOURCES := $(wildcard $(d)/*.cc)
+
+libutil-tests_EXTRA_INCLUDES = \
+    -I tests/unit/libutil-support \
+    $(INCLUDE_libutil) \
+    $(INCLUDE_libutilc)
+
+libutil-tests_CXXFLAGS += $(libutil-tests_EXTRA_INCLUDES)
+
+libutil-tests_LIBS = libutil-test-support libutil libutilc
+
+libutil-tests_LDFLAGS := -lrapidcheck $(GTEST_LIBS)
+
+ifdef HOST_WINDOWS
+  # Increase the default reserved stack size to 65 MB so Nix doesn't run out of space
+  libutil-tests_LDFLAGS += -Wl,--stack,$(shell echo $$((65 * 1024 * 1024)))
+endif
+
+check: $(d)/data/git/check-data.sh.test
+
+$(eval $(call run-test,$(d)/data/git/check-data.sh))