selftests/bpf: Make %.test.d prerequisite order only

%.test.o should depend on %.test.d order-only to avoid unnecessary
recompilations due to compiler dumping .d and .o files in random
order.

Signed-off-by: Ihor Solodrai <ihor.solodrai@pm.me>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/all/gSoCpn9qV5K0hRvrvYlrw2StRntsvZcrUuDfkZUh1Ang9E6yZ9XJGYDuIP9iCuM2YTVhSEzEXCteQ94_0uIUjx_mXwupFJt64NJaiMr99a0=@pm.me
Link: https://lore.kernel.org/all/FnnOUuDMmf0SebqA1bb0fQIW4vguOZ-VcAlPnPMnmT2lJYxMMxFAhcgh77px8MsPS5Fr01I0YQxLJClEJTFWHdpaTBVSQhlmsVTcEsNQbV4=@pm.me
Link: https://lore.kernel.org/bpf/yyjJRl5LODbI4-FseU0wIP5e4ik0zAy7Sy-5eGwrzG_UanI8rwWlQPfXAFnn_27hoZFogoUHRSWxFsLk7hPr0b6P5TZ3cRrM30_ggnu555M=@pm.me

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 888ba68e659211e9912d43966bd6254ce69f9b67..083f413a9c9851b59f38203e0715b5207813b7dd 100644 (file)
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -598,7 +598,7 @@ endif
 # Note: we cd into output directory to ensure embedded BPF object is found
 $(TRUNNER_TEST_OBJS): $(TRUNNER_OUTPUT)/%.test.o:                      \
                      $(TRUNNER_TESTS_DIR)/%.c                          \
-                     $(TRUNNER_OUTPUT)/%.test.d
+                     | $(TRUNNER_OUTPUT)/%.test.d
        $$(call msg,TEST-OBJ,$(TRUNNER_BINARY),$$@)
        $(Q)cd $$(@D) && $$(CC) -I. $$(CFLAGS) -MMD -MT $$@ -c $(CURDIR)/$$< $$(LDLIBS) -o $$(@F)