Makefile: remove redundant tool coverage variables
[linux-block.git] / arch / csky / kernel / vdso / Makefile
1 # SPDX-License-Identifier: GPL-2.0-only
2
3 # Include the generic Makefile to check the built vdso.
4 include $(srctree)/lib/vdso/Makefile
5
6 # Symbols present in the vdso
7 vdso-syms  += rt_sigreturn
8 vdso-syms  += vgettimeofday
9
10 # Files to link into the vdso
11 obj-vdso = $(patsubst %, %.o, $(vdso-syms)) note.o
12
13 ifneq ($(c-gettimeofday-y),)
14         CFLAGS_vgettimeofday.o += -include $(c-gettimeofday-y)
15 endif
16
17 ccflags-y := -fno-stack-protector -DBUILD_VDSO32
18
19 # Build rules
20 targets := $(obj-vdso) vdso.so vdso.so.dbg vdso.lds vdso-dummy.o
21 obj-vdso := $(addprefix $(obj)/, $(obj-vdso))
22
23 obj-y += vdso.o vdso-syms.o
24 CPPFLAGS_vdso.lds += -P -C -U$(ARCH)
25
26 # Force dependency
27 $(obj)/vdso.o: $(obj)/vdso.so
28
29 SYSCFLAGS_vdso.so.dbg = $(c_flags)
30 $(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) FORCE
31         $(call if_changed,vdsold)
32 SYSCFLAGS_vdso.so.dbg = -shared -s -Wl,-soname=linux-vdso.so.1 \
33         -Wl,--build-id=sha1 -Wl,--hash-style=both
34
35 $(obj)/vdso-syms.S: $(obj)/vdso.so FORCE
36         $(call if_changed,so2s)
37
38 # strip rule for the .so file
39 $(obj)/%.so: OBJCOPYFLAGS := -S
40 $(obj)/%.so: $(obj)/%.so.dbg FORCE
41         $(call if_changed,objcopy)
42
43 # actual build commands
44 # The DSO images are built using a special linker script
45 # Make sure only to export the intended __vdso_xxx symbol offsets.
46 quiet_cmd_vdsold = VDSOLD  $@
47       cmd_vdsold = $(CC) $(KBUILD_CFLAGS) $(call cc-option, -no-pie) -nostdlib -nostartfiles $(SYSCFLAGS_$(@F)) \
48                            -Wl,-T,$(filter-out FORCE,$^) -o $@.tmp && \
49                    $(CROSS_COMPILE)objcopy \
50                            $(patsubst %, -G __vdso_%, $(vdso-syms)) $@.tmp $@ && \
51                    rm $@.tmp
52
53 # Extracts symbol offsets from the VDSO, converting them into an assembly file
54 # that contains the same symbols at the same offsets.
55 quiet_cmd_so2s = SO2S    $@
56       cmd_so2s = $(NM) -D $< | $(src)/so2s.sh > $@