[xen staging] libxl/ACPI: add missing build dependency

[patchbot@xxxxxxx]

commit 1b47cc852fd130ed9ce274a0f1600a4a62949a2c
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Tue Mar 9 18:04:07 2021 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Mar 9 18:04:07 2021 +0100

    libxl/ACPI: add missing build dependency
    
    Just like all other object files - wherever *.o is mentioned, *.opic
    also needs mentioning to yield consistent behavior. Otherwise make may
    decide to (re)build the object before recursion into $(ACPI_PATH)/ (to
    update $(DSDT_FILES-y) and ssdt_*.h) was actually finished.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Release-Acked-by: Ian Jackson <iwj@xxxxxxxxxxxxxx>
---
 tools/libs/light/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/libs/light/Makefile b/tools/libs/light/Makefile
index 216e2f55b0..7d8c51d492 100644
--- a/tools/libs/light/Makefile
+++ b/tools/libs/light/Makefile
@@ -32,7 +32,7 @@ ACPI_PATH  = $(XEN_ROOT)/tools/libacpi
 DSDT_FILES-$(CONFIG_X86) = dsdt_pvh.c
 ACPI_OBJS  = $(patsubst %.c,%.o,$(DSDT_FILES-y)) build.o static_tables.o
 ACPI_PIC_OBJS = $(patsubst %.o,%.opic,$(ACPI_OBJS))
-$(DSDT_FILES-y) build.o: acpi
+$(DSDT_FILES-y) build.o build.opic: acpi
 vpath build.c $(ACPI_PATH)/
 vpath static_tables.c $(ACPI_PATH)/
 
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