On 08/05/2016 15:18, Wei Yang wrote:
> In x86 Makefile, each elf target has a rule for its dependent, which shares
> the same pattern. We could let makefile to handle this job instead of
> writing a specific rule for each elf target. By doing so, the makefile rule
> looks clear and would be easy for adding new cases.
>
> This patch does several cleanup:
> 1. add $(cstart.o) in *.elf dependent
> 2. remove all those elf rules which share the same pattern
> 3. remove the *.o dependent in the elf rule who has extra dependent
> 4. move the vmx.elf rule to Makefile.x86_64 since this is not a common case
> 5. remove elf rules in Makefile.i386
> 6. Add %.elf and %.o in .PRECIOUS to keep them after make
>
> Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
>
> ---
> v2:
> add .PRECIOUS special target to keep those intermediate files
I think keeping the .o is useless, as it will be recreated each time
(the source changes).
If .elf need to be kept, they should be in the targets, something like:
-- a/x86/Makefile.x86_64
+++ b/x86/Makefile.x86_64
@@ -6,14 +6,19 @@ CFLAGS += -mno-red-zone
cflatobjs += lib/x86/setjmp64.o
tests = $(TEST_DIR)/access.flat $(TEST_DIR)/apic.flat \
+ $(TEST_DIR)/access.elf $(TEST_DIR)/apic.elf \
$(TEST_DIR)/emulator.flat $(TEST_DIR)/idt_test.flat \
+ $(TEST_DIR)/emulator.elf $(TEST_DIR)/idt_test.elf \
...
We don't need some magic here.
Laurent
> ---
> x86/Makefile.common | 72 ++++++-----------------------------------------------
> x86/Makefile.i386 | 4 ---
> x86/Makefile.x86_64 | 2 ++
> 3 files changed, 9 insertions(+), 69 deletions(-)
>
> diff --git a/x86/Makefile.common b/x86/Makefile.common
> index 298e5f7..356d879 100644
> --- a/x86/Makefile.common
> +++ b/x86/Makefile.common
> @@ -25,8 +25,11 @@ KEEP_FRAME_POINTER := y
>
> libgcc := $(shell $(CC) -m$(bits) --print-libgcc-file-name)
>
> +# We want to keep intermediate file: %.elf and %.o
> +.PRECIOUS: %.elf %.o
> +
> FLATLIBS = lib/libcflat.a $(libgcc)
> -%.elf: %.o $(FLATLIBS) x86/flat.lds
> +%.elf: %.o $(FLATLIBS) x86/flat.lds $(cstart.o)
> $(CC) $(CFLAGS) -nostdlib -o $@ -Wl,-T,x86/flat.lds \
> $(filter %.o, $^) $(FLATLIBS)
>
> @@ -53,77 +56,16 @@ test_cases: $(tests-common) $(tests)
>
> $(TEST_DIR)/%.o: CFLAGS += -std=gnu99 -ffreestanding -I lib -I lib/x86
>
> -$(TEST_DIR)/access.elf: $(cstart.o) $(TEST_DIR)/access.o
> -
> -$(TEST_DIR)/hypercall.elf: $(cstart.o) $(TEST_DIR)/hypercall.o
> -
> -$(TEST_DIR)/sieve.elf: $(cstart.o) $(TEST_DIR)/sieve.o
> -
> -$(TEST_DIR)/vmexit.elf: $(cstart.o) $(TEST_DIR)/vmexit.o
> -
> -$(TEST_DIR)/smptest.elf: $(cstart.o) $(TEST_DIR)/smptest.o
> -
> -$(TEST_DIR)/emulator.elf: $(cstart.o) $(TEST_DIR)/emulator.o
> -
> -$(TEST_DIR)/port80.elf: $(cstart.o) $(TEST_DIR)/port80.o
> -
> -$(TEST_DIR)/tsc.elf: $(cstart.o) $(TEST_DIR)/tsc.o
> -
> -$(TEST_DIR)/tsc_adjust.elf: $(cstart.o) $(TEST_DIR)/tsc_adjust.o
> -
> -$(TEST_DIR)/apic.elf: $(cstart.o) $(TEST_DIR)/apic.o
> -
> -$(TEST_DIR)/ioapic.elf: $(cstart.o) $(TEST_DIR)/ioapic.o
> -
> -$(TEST_DIR)/tscdeadline_latency.elf: $(cstart.o) $(TEST_DIR)/tscdeadline_latency.o
> -
> -$(TEST_DIR)/init.elf: $(cstart.o) $(TEST_DIR)/init.o
> -
> $(TEST_DIR)/realmode.elf: $(TEST_DIR)/realmode.o
> $(CC) -m32 -nostdlib -o $@ -Wl,-T,$(TEST_DIR)/realmode.lds $^
>
> $(TEST_DIR)/realmode.o: bits = 32
>
> -$(TEST_DIR)/msr.elf: $(cstart.o) $(TEST_DIR)/msr.o
> -
> -$(TEST_DIR)/idt_test.elf: $(cstart.o) $(TEST_DIR)/idt_test.o
> -
> -$(TEST_DIR)/xsave.elf: $(cstart.o) $(TEST_DIR)/xsave.o
> -
> -$(TEST_DIR)/rmap_chain.elf: $(cstart.o) $(TEST_DIR)/rmap_chain.o
> -
> -$(TEST_DIR)/svm.elf: $(cstart.o) $(TEST_DIR)/svm.o
> -
> -$(TEST_DIR)/kvmclock_test.elf: $(cstart.o) $(TEST_DIR)/kvmclock.o \
> - $(TEST_DIR)/kvmclock_test.o
> -
> -$(TEST_DIR)/eventinj.elf: $(cstart.o) $(TEST_DIR)/eventinj.o
> -
> -$(TEST_DIR)/s3.elf: $(cstart.o) $(TEST_DIR)/s3.o
> -
> -$(TEST_DIR)/pmu.elf: $(cstart.o) $(TEST_DIR)/pmu.o
> -
> -$(TEST_DIR)/asyncpf.elf: $(cstart.o) $(TEST_DIR)/asyncpf.o
> -
> -$(TEST_DIR)/pcid.elf: $(cstart.o) $(TEST_DIR)/pcid.o
> -
> -$(TEST_DIR)/smap.elf: $(cstart.o) $(TEST_DIR)/smap.o
> -
> -$(TEST_DIR)/pku.elf: $(cstart.o) $(TEST_DIR)/pku.o
> -
> -$(TEST_DIR)/vmx.elf: $(cstart.o) $(TEST_DIR)/vmx.o $(TEST_DIR)/vmx_tests.o
> -
> -$(TEST_DIR)/debug.elf: $(cstart.o) $(TEST_DIR)/debug.o
> -
> -$(TEST_DIR)/memory.elf: $(cstart.o) $(TEST_DIR)/memory.o
> -
> -$(TEST_DIR)/hyperv_synic.elf: $(cstart.o) $(TEST_DIR)/hyperv.o \
> - $(TEST_DIR)/hyperv_synic.o
> +$(TEST_DIR)/kvmclock_test.elf: $(TEST_DIR)/kvmclock.o
>
> -$(TEST_DIR)/hyperv_stimer.elf: $(cstart.o) $(TEST_DIR)/hyperv.o \
> - $(TEST_DIR)/hyperv_stimer.o
> +$(TEST_DIR)/hyperv_synic.elf: $(TEST_DIR)/hyperv.o
>
> -$(TEST_DIR)/setjmp.elf: $(cstart.o) $(TEST_DIR)/setjmp.o
> +$(TEST_DIR)/hyperv_stimer.elf: $(TEST_DIR)/hyperv.o
>
> arch_clean:
> $(RM) $(TEST_DIR)/*.o $(TEST_DIR)/*.flat $(TEST_DIR)/*.elf \
> diff --git a/x86/Makefile.i386 b/x86/Makefile.i386
> index 8a4c45c..c4176c4 100644
> --- a/x86/Makefile.i386
> +++ b/x86/Makefile.i386
> @@ -9,7 +9,3 @@ tests = $(TEST_DIR)/taskswitch.flat $(TEST_DIR)/taskswitch2.flat \
> $(TEST_DIR)/cmpxchg8b.flat
>
> include $(TEST_DIR)/Makefile.common
> -
> -$(TEST_DIR)/cmpxchg8b.elf: $(cstart.o) $(TEST_DIR)/cmpxchg8b.o
> -$(TEST_DIR)/taskswitch.elf: $(cstart.o) $(TEST_DIR)/taskswitch.o
> -$(TEST_DIR)/taskswitch2.elf: $(cstart.o) $(TEST_DIR)/taskswitch2.o
> diff --git a/x86/Makefile.x86_64 b/x86/Makefile.x86_64
> index 6b7ccfb..e166911 100644
> --- a/x86/Makefile.x86_64
> +++ b/x86/Makefile.x86_64
> @@ -16,3 +16,5 @@ tests += $(TEST_DIR)/vmx.flat
> tests += $(TEST_DIR)/tscdeadline_latency.flat
>
> include $(TEST_DIR)/Makefile.common
> +
> +$(TEST_DIR)/vmx.elf: $(TEST_DIR)/vmx_tests.o
>
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