diff options
Diffstat (limited to 'scripts/Makefile.spl')
| -rw-r--r-- | scripts/Makefile.spl | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/scripts/Makefile.spl b/scripts/Makefile.spl index ac2d2033ba..7872cbaabe 100644 --- a/scripts/Makefile.spl +++ b/scripts/Makefile.spl @@ -448,8 +448,48 @@ quiet_cmd_sym ?= SYM $@ $(obj)/$(SPL_BIN).sym: $(obj)/$(SPL_BIN) FORCE $(call if_changed,sym) +# Generate linker list symbols references to force compiler to not optimize +# them away when compiling with LTO +ifdef CONFIG_LTO +u-boot-spl-keep-syms-lto := $(obj)/keep-syms-lto.o +u-boot-spl-keep-syms-lto_c := \ + $(patsubst $(obj)/%.o,$(obj)/%.c,$(u-boot-spl-keep-syms-lto)) + +quiet_cmd_keep_syms_lto = KSL $@ + cmd_keep_syms_lto = \ + NM=$(NM) $(srctree)/scripts/gen_ll_addressable_symbols.sh $^ >$@ + +quiet_cmd_keep_syms_lto_cc = KSLCC $@ + cmd_keep_syms_lto_cc = \ + $(CC) $(filter-out $(LTO_CFLAGS),$(c_flags)) -c -o $@ $< + +$(u-boot-spl-keep-syms-lto_c): $(u-boot-spl-main) $(u-boot-spl-platdata) + $(call if_changed,keep_syms_lto) +$(u-boot-spl-keep-syms-lto): $(u-boot-spl-keep-syms-lto_c) + $(call if_changed,keep_syms_lto_cc) +else +u-boot-spl-keep-syms-lto := +endif + # Rule to link u-boot-spl # May be overridden by arch/$(ARCH)/config.mk +ifdef CONFIG_LTO +quiet_cmd_u-boot-spl ?= LTO $@ + cmd_u-boot-spl ?= \ + ( \ + cd $(obj) && \ + $(CC) -nostdlib -nostartfiles $(LTO_FINAL_LDFLAGS) $(c_flags) \ + $(KBUILD_LDFLAGS:%=-Wl,%) $(LDFLAGS_$(@F):%=-Wl,%) \ + $(patsubst $(obj)/%,%,$(u-boot-spl-init)) \ + -Wl,--whole-archive \ + $(patsubst $(obj)/%,%,$(u-boot-spl-main)) \ + $(patsubst $(obj)/%,%,$(u-boot-spl-platdata)) \ + $(patsubst $(obj)/%,%,$(u-boot-spl-keep-syms-lto)) \ + $(PLATFORM_LIBS) \ + -Wl,--no-whole-archive \ + -Wl,-Map,$(SPL_BIN).map -o $(SPL_BIN) \ + ) +else quiet_cmd_u-boot-spl ?= LD $@ cmd_u-boot-spl ?= \ ( \ @@ -462,9 +502,11 @@ quiet_cmd_u-boot-spl ?= LD $@ --no-whole-archive \ $(PLATFORM_LIBS) -Map $(SPL_BIN).map -o $(SPL_BIN) \ ) +endif $(obj)/$(SPL_BIN): $(u-boot-spl-platdata) $(u-boot-spl-init) \ - $(u-boot-spl-main) $(obj)/u-boot-spl.lds FORCE + $(u-boot-spl-main) $(u-boot-spl-keep-syms-lto) \ + $(obj)/u-boot-spl.lds FORCE $(call if_changed,u-boot-spl) $(sort $(u-boot-spl-init) $(u-boot-spl-main)): $(u-boot-spl-dirs) ; |