sandbox: make LTO available

Make LTO available for sandbox architecture.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/arch/Kconfig b/arch/Kconfig
index 6c4b81a..c5c03d4 100644 (file)
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -101,6 +101,7 @@ config RISCV
 
 config SANDBOX
        bool "Sandbox"
+       select ARCH_SUPPORTS_LTO
        select BOARD_LATE_INIT
        select BZIP2
        select CMD_POWEROFF

diff --git a/arch/sandbox/config.mk b/arch/sandbox/config.mk
index 2149771..1f8cb61 100644 (file)
--- a/arch/sandbox/config.mk
+++ b/arch/sandbox/config.mk
@@ -17,16 +17,20 @@ PLATFORM_CPPFLAGS += $(shell $(SDL_CONFIG) --cflags)
 endif
 
 cmd_u-boot__ = $(CC) -o $@ -Wl,-T u-boot.lds $(u-boot-init) \
+       $(LTO_FINAL_LDFLAGS) \
        -Wl,--whole-archive \
                $(u-boot-main) \
+               $(u-boot-keep-syms-lto) \
        -Wl,--no-whole-archive \
        $(PLATFORM_LIBS) -Wl,-Map -Wl,u-boot.map
 
 cmd_u-boot-spl = (cd $(obj) && $(CC) -o $(SPL_BIN) -Wl,-T u-boot-spl.lds \
+       $(LTO_FINAL_LDFLAGS) \
        $(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)) \
        -Wl,--no-whole-archive \
        $(PLATFORM_LIBS) -Wl,-Map -Wl,u-boot-spl.map -Wl,--gc-sections)