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sandbox: eliminate unused functions from binaries
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>
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2 changed files with 3 additions and 3 deletions
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@ -2,7 +2,7 @@
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# Copyright (c) 2011 The Chromium OS Authors.
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PLATFORM_CPPFLAGS += -D__SANDBOX__ -U_FORTIFY_SOURCE
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PLATFORM_CPPFLAGS += -fPIC
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PLATFORM_CPPFLAGS += -fPIC -ffunction-sections -fdata-sections
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PLATFORM_LIBS += -lrt
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SDL_CONFIG ?= sdl2-config
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@ -30,7 +30,7 @@ cmd_u-boot__ = $(CC) -o $@ -Wl,-T u-boot.lds $(u-boot-init) \
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$(u-boot-main) \
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$(u-boot-keep-syms-lto) \
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-Wl,--no-whole-archive \
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$(PLATFORM_LIBS) -Wl,-Map -Wl,u-boot.map
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$(PLATFORM_LIBS) -Wl,-Map -Wl,u-boot.map -Wl,--gc-sections
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cmd_u-boot-spl = (cd $(obj) && $(CC) -o $(SPL_BIN) -Wl,-T u-boot-spl.lds \
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$(KBUILD_LDFLAGS:%=-Wl,%) \
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@ -15,7 +15,7 @@ SECTIONS
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_u_boot_sandbox_getopt : {
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*(_u_boot_sandbox_getopt_start)
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*(_u_boot_sandbox_getopt)
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KEEP(*(_u_boot_sandbox_getopt))
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*(_u_boot_sandbox_getopt_end)
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}
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