[Xen-devel] [PATCH] build: fix dependency file generation with ENFORCE_UNIQUE_SYMBOLS=y

[Jan Beulich <jbeulich@xxxxxxxx>]

The recorded file, unless overridden by -MQ (or -MT) is that specified
by -o, which doesn't produce correct dependencies and hence will cause
failure to re-build when included files change.

Fixes: 81ecb38b83b0 ("build: provide option to disambiguate symbol names")
Reported-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/Rules.mk
+++ b/xen/Rules.mk
@@ -195,7 +195,7 @@ SRCPATH := $(patsubst $(BASEDIR)/%,%,$(C
 
 %.o: %.c Makefile
 ifeq ($(CONFIG_ENFORCE_UNIQUE_SYMBOLS),y)
-       $(CC) $(CFLAGS) -c $< -o $(@D)/.$(@F).tmp
+       $(CC) $(CFLAGS) -c $< -o $(@D)/.$(@F).tmp -MQ $@
 ifeq ($(clang),y)
        $(OBJCOPY) --redefine-sym $<=$(SRCPATH)/$< $(@D)/.$(@F).tmp $@
 else

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel