From: Heinrich Schuchardt heinrich.schuchardt@canonical.com
The sandbox should closely mimic other architectures.
Place each function or data in a separate section and let the linker eliminate unused ones. This will reduce the binary size.
In the linker script mark that u_boot_sandbox_getopt are to be kept.
Signed-off-by: Heinrich Schuchardt heinrich.schuchardt@canonical.com Reviewed-by: Tom Rini trini@konsulko.com --- Changes in v5: - This is Heinrich's v3 just brought to this series to enable the overall series goal to work --- arch/sandbox/config.mk | 4 ++-- arch/sandbox/cpu/u-boot.lds | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/sandbox/config.mk b/arch/sandbox/config.mk index 2d184c5f652a..1d50991f8d24 100644 --- a/arch/sandbox/config.mk +++ b/arch/sandbox/config.mk @@ -2,7 +2,7 @@ # Copyright (c) 2011 The Chromium OS Authors.
PLATFORM_CPPFLAGS += -D__SANDBOX__ -U_FORTIFY_SOURCE -PLATFORM_CPPFLAGS += -fPIC +PLATFORM_CPPFLAGS += -fPIC -ffunction-sections -fdata-sections PLATFORM_LIBS += -lrt SDL_CONFIG ?= sdl2-config
@@ -30,7 +30,7 @@ cmd_u-boot__ = $(CC) -o $@ -Wl,-T u-boot.lds $(u-boot-init) \ $(u-boot-main) \ $(u-boot-keep-syms-lto) \ -Wl,--no-whole-archive \ - $(PLATFORM_LIBS) -Wl,-Map -Wl,u-boot.map + $(PLATFORM_LIBS) -Wl,-Map -Wl,u-boot.map -Wl,--gc-sections
cmd_u-boot-spl = (cd $(obj) && $(CC) -o $(SPL_BIN) -Wl,-T u-boot-spl.lds \ $(KBUILD_LDFLAGS:%=-Wl,%) \ diff --git a/arch/sandbox/cpu/u-boot.lds b/arch/sandbox/cpu/u-boot.lds index ba8dee50c7bd..52f13af3742f 100644 --- a/arch/sandbox/cpu/u-boot.lds +++ b/arch/sandbox/cpu/u-boot.lds @@ -15,7 +15,7 @@ SECTIONS
_u_boot_sandbox_getopt : { *(_u_boot_sandbox_getopt_start) - *(_u_boot_sandbox_getopt) + KEEP(*(_u_boot_sandbox_getopt)) *(_u_boot_sandbox_getopt_end) }