configs: Use .SECONDARY to prevent deletion of intermediate files

Cleaner than the dummy rule.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

diff --git a/configs/Makefile b/configs/Makefile
index 66cef34e2598777da7da1bba75070f65c53efac3..6a8fb9d21859a9f4a19245512cd5f4ed9fa785a3 100644 (file)
--- a/configs/Makefile
+++ b/configs/Makefile
@@ -20,7 +20,8 @@ always := $(CONFIGS:.c=.cell)
 
 targets += $(CONFIGS:.c=.o) $(CONFIGS:.c=.cell)
 
-dummy: $(addprefix $(obj)/,$(CONFIGS:.c=.o))
+# prevent deleting intermediate files which would cause rebuilds
+.SECONDARY: $(addprefix $(obj)/,$(CONFIGS:.c=.o))
 
 $(obj)/%.cell: $(obj)/%.o
        $(call if_changed,objcopy)