[kvm-unit-tests PATCH] (arm|powerpc|s390x): Makefile: add `%.aux.o` target

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It's unusual to create multiple files in one target rule, therefore create an
extra target for `%.aux.o` and list it as prerequisite. As a side effect, this
change fixes the dependency tracking of the prerequisites of
`.aux.o` (`lib/auxinfo.c` was missing).

Signed-off-by: Marc Hartmayer <mhartmay@xxxxxxxxxxxxx>
---
 arm/Makefile.common     | 23 ++++++++++++-----------
 powerpc/Makefile.common | 10 +++++-----
 s390x/Makefile          |  9 +++++----
 3 files changed, 22 insertions(+), 20 deletions(-)

diff --git a/arm/Makefile.common b/arm/Makefile.common
index 5214c8acdab3..54cb4a63ab64 100644
--- a/arm/Makefile.common
+++ b/arm/Makefile.common
@@ -70,14 +70,14 @@ eabiobjs = lib/arm/eabi_compat.o
 FLATLIBS = $(libcflat) $(LIBFDT_archive) $(libeabi)
 
 ifeq ($(CONFIG_EFI),y)
+%.aux.o: $(SRCDIR)/lib/auxinfo.c
+	$(CC) $(CFLAGS) -c -o $@ $^ \
+		-DPROGNAME=\"$(@:.aux.o=.efi)\" -DAUXFLAGS=$(AUXFLAGS)
+
 %.so: EFI_LDFLAGS += -defsym=EFI_SUBSYSTEM=0xa --no-undefined
-%.so: %.o $(FLATLIBS) $(SRCDIR)/arm/efi/elf_aarch64_efi.lds $(cstart.o)
-	$(CC) $(CFLAGS) -c -o $(@:.so=.aux.o) $(SRCDIR)/lib/auxinfo.c \
-		-DPROGNAME=\"$(@:.so=.efi)\" -DAUXFLAGS=$(AUXFLAGS)
+%.so: %.o $(FLATLIBS) $(SRCDIR)/arm/efi/elf_aarch64_efi.lds $(cstart.o) %.aux.o
 	$(LD) $(EFI_LDFLAGS) -o $@ -T $(SRCDIR)/arm/efi/elf_aarch64_efi.lds \
-		$(filter %.o, $^) $(FLATLIBS) $(@:.so=.aux.o) \
-		$(EFI_LIBS)
-	$(RM) $(@:.so=.aux.o)
+		$(filter %.o, $^) $(FLATLIBS) $(EFI_LIBS)
 
 %.efi: %.so
 	$(call arch_elf_check, $^)
@@ -90,13 +90,14 @@ ifeq ($(CONFIG_EFI),y)
 		-j .reloc \
 		-O binary $^ $@
 else
+%.aux.o: $(SRCDIR)/lib/auxinfo.c
+	$(CC) $(CFLAGS) -c -o $@ $^ \
+		-DPROGNAME=\"$(@:.aux.o=.flat)\" -DAUXFLAGS=$(AUXFLAGS)
+
 %.elf: LDFLAGS += $(arch_LDFLAGS)
-%.elf: %.o $(FLATLIBS) $(SRCDIR)/arm/flat.lds $(cstart.o)
-	$(CC) $(CFLAGS) -c -o $(@:.elf=.aux.o) $(SRCDIR)/lib/auxinfo.c \
-		-DPROGNAME=\"$(@:.elf=.flat)\" -DAUXFLAGS=$(AUXFLAGS)
+%.elf: %.o $(FLATLIBS) $(SRCDIR)/arm/flat.lds $(cstart.o) %.aux.o
 	$(LD) $(LDFLAGS) -o $@ -T $(SRCDIR)/arm/flat.lds \
-		$(filter %.o, $^) $(FLATLIBS) $(@:.elf=.aux.o)
-	$(RM) $(@:.elf=.aux.o)
+		$(filter %.o, $^) $(FLATLIBS)
 	@chmod a-x $@
 
 %.flat: %.elf
diff --git a/powerpc/Makefile.common b/powerpc/Makefile.common
index f8f474908b06..483ff64829a7 100644
--- a/powerpc/Makefile.common
+++ b/powerpc/Makefile.common
@@ -47,16 +47,16 @@ cflatobjs += lib/powerpc/smp.o
 
 OBJDIRS += lib/powerpc
 
+%.aux.o: $(SRCDIR)/lib/auxinfo.c
+	$(CC) $(CFLAGS) -c -o $@ $^ -DPROGNAME=\"$(@:.aux.o=.elf)\"
+
 FLATLIBS = $(libcflat) $(LIBFDT_archive)
 %.elf: CFLAGS += $(arch_CFLAGS)
 %.elf: LDFLAGS += $(arch_LDFLAGS) -pie -n
-%.elf: %.o $(FLATLIBS) $(SRCDIR)/powerpc/flat.lds $(cstart.o) $(reloc.o)
-	$(CC) $(CFLAGS) -c -o $(@:.elf=.aux.o) $(SRCDIR)/lib/auxinfo.c \
-		-DPROGNAME=\"$@\"
+%.elf: %.o $(FLATLIBS) $(SRCDIR)/powerpc/flat.lds $(cstart.o) $(reloc.o) %.aux.o
 	$(LD) $(LDFLAGS) -o $@ \
 		-T $(SRCDIR)/powerpc/flat.lds --build-id=none \
-		$(filter %.o, $^) $(FLATLIBS) $(@:.elf=.aux.o)
-	$(RM) $(@:.elf=.aux.o)
+		$(filter %.o, $^) $(FLATLIBS)
 	@chmod a-x $@
 	@echo -n Checking $@ for unsupported reloc types...
 	@if $(OBJDUMP) -R $@ | grep R_ | grep -v R_PPC64_RELATIVE; then	\
diff --git a/s390x/Makefile b/s390x/Makefile
index f79fd0098312..e64521e002ce 100644
--- a/s390x/Makefile
+++ b/s390x/Makefile
@@ -176,13 +176,14 @@ lds-autodepend-flags = -MMD -MF $(dir $*).$(notdir $*).d -MT $@
 %.lds: %.lds.S $(asm-offsets)
 	$(CPP) $(lds-autodepend-flags) $(CPPFLAGS) -P -C -o $@ $<
 
+%.aux.o: $(SRCDIR)/lib/auxinfo.c
+	$(CC) $(CFLAGS) -c -o $@ $^ -DPROGNAME=\"$(@:.aux.o=.elf)\"
+
 .SECONDEXPANSION:
-%.elf: $(FLATLIBS) $(asmlib) $(SRCDIR)/s390x/flat.lds $$(snippets-obj) $$(snippet-hdr-obj) %.o
-	$(CC) $(CFLAGS) -c -o $(@:.elf=.aux.o) $(SRCDIR)/lib/auxinfo.c -DPROGNAME=\"$@\"
+%.elf: $(FLATLIBS) $(asmlib) $(SRCDIR)/s390x/flat.lds $$(snippets-obj) $$(snippet-hdr-obj) %.o %.aux.o
 	@$(CC) $(LDFLAGS) -o $@ -T $(SRCDIR)/s390x/flat.lds \
-		$(filter %.o, $^) $(FLATLIBS) $(snippets-obj) $(snippet-hdr-obj) $(@:.elf=.aux.o) || \
+		$(filter %.o, $^) $(FLATLIBS) $(snippets-obj) $(snippet-hdr-obj) || \
 		{ echo "Failure probably caused by missing definition of gen-se-header executable"; exit 1; }
-	$(RM) $(@:.elf=.aux.o)
 	@chmod a-x $@
 
 # Secure Execution Customer Communication Key file
-- 
2.34.1





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