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treewide: refactor to use PKG_BUILD_FLAGS:=gc-sections

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See commit da370098 "treewide: add support for "gc-sections" in
PKG_BUILD_FLAGS" on the main repository.

Signed-off-by: Andre Heider <a.heider@gmail.com>
This commit is contained in:
Andre Heider
2023-03-23 09:52:20 +01:00
committed by Nick Hainke
parent 9febc56a44
commit 67ad3b9b96
2 changed files with 4 additions and 9 deletions
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8
batctl/Makefile
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@@ -16,6 +16,7 @@ PKG_LICENSE:=GPL-2.0-only ISC MIT
PKG_LICENSE_FILES:=LICENSES/preferred/GPL-2.0 LICENSES/preferred/MIT LICENSES/deprecated/ISC
PKG_BUILD_PARALLEL:=1
PKG_BUILD_FLAGS:=gc-sections
include $(INCLUDE_DIR)/package.mk
@@ -70,13 +71,6 @@ $(Package/batctl/description)
Subcommands for configuration, online and offline debugging are enabled.
endef
# The linker can identify unused sections of a binary when each symbol is stored
# in a separate section. This mostly removes unused linker sections and reduces
# the size by ~3% on mipsel.
TARGET_CFLAGS += -ffunction-sections -fdata-sections
TARGET_LDFLAGS += -Wl,--gc-sections
# Link-time optimization allows to move parts of the optimization from the single
# source file to the global source view. This is done by emitting the GIMPLE
# representation in each object file and analyzing it again during the link step.