mirror of
https://github.com/Telecominfraproject/OpenCellular.git
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2476ae11fc
Put each functions in a separate section by using -ffunction-sections, then discard the non-referenced ones in the linker with -gc-sections. Force keeping a few special symbols by using the KEEP() linker directive. This modification is not saving a lot of spaces per se, but will enable larger code pruning with future optional features. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> BRANCH=none BUG=none TEST=make buildall, manually check discarded symbols in the .map file and run on Spring and Link. The size delta is the following: Link: total 85.7k -> 84.9k (.text 60.3k -> 59.5k) Spring: total 59.2k -> 57.2k (.text 44.4k -> 42.5k) Change-Id: Ib6eb0d3f2cc4fc172c9fc26acac2e486921690a3 Reviewed-on: https://chromium-review.googlesource.com/189224 Reviewed-by: Randall Spangler <rspangler@chromium.org> Commit-Queue: Vincent Palatin <vpalatin@chromium.org> Tested-by: Vincent Palatin <vpalatin@chromium.org>
61 lines
2.5 KiB
Makefile
61 lines
2.5 KiB
Makefile
# -*- makefile -*-
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# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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#
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# Toolchain configuration build system
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#
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# Toolchain configuration
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HOST_CROSS_COMPILE ?= x86_64-pc-linux-gnu-
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CC=$(CROSS_COMPILE)gcc
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CPP=$(CROSS_COMPILE)cpp
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LD=$(CROSS_COMPILE)ld
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OBJCOPY=$(CROSS_COMPILE)objcopy
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OBJDUMP=$(CROSS_COMPILE)objdump
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PKG_CONFIG?=pkg-config
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BUILDCC?=gcc
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HOSTCC?=$(HOST_CROSS_COMPILE)gcc
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CFLAGS_WARN=-Wall -Werror -Wundef -Wstrict-prototypes -Wno-trigraphs \
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-fno-strict-aliasing -fno-common \
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-Werror-implicit-function-declaration -Wno-format-security \
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-fno-delete-null-pointer-checks -Wdeclaration-after-statement \
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-Wno-pointer-sign -fno-strict-overflow -fconserve-stack
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CFLAGS_DEBUG= -g
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CFLAGS_INCLUDE=$(foreach i,$(includes),-I$(i) ) -I.
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CFLAGS_TEST=$(if $(TEST_BUILD),-DTEST_BUILD \
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-DTEST_TASKFILE=$(PROJECT).tasklist,) \
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$(if $(EMU_BUILD),-DEMU_BUILD) \
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$(if $($(PROJECT)-scale),-DTEST_TIME_SCALE=$($(PROJECT)-scale)) \
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-DTEST_$(PROJECT) -DTEST_$(UC_PROJECT)
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CFLAGS_COVERAGE=$(if $(TEST_COVERAGE),-fprofile-arcs -ftest-coverage \
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-DTEST_COVERAGE,)
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CFLAGS_DEFINE=-DOUTDIR=$(out) -DCHIP=$(CHIP) -DBOARD_TASKFILE=ec.tasklist \
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-DBOARD=$(BOARD) -DCORE=$(CORE) -DPROJECT=$(PROJECT) \
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-DCHIP_VARIANT=$(CHIP_VARIANT) -DCHIP_FAMILY=$(CHIP_FAMILY) \
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-DBOARD_$(UC_BOARD) -DCHIP_$(UC_CHIP) -DCORE_$(UC_CORE) \
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-DCHIP_VARIANT_$(UC_CHIP_VARIANT) -DCHIP_FAMILY_$(UC_CHIP_FAMILY)
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CPPFLAGS=$(CFLAGS_DEFINE) $(CFLAGS_INCLUDE) $(CFLAGS_TEST) \
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$(EXTRA_CFLAGS) $(CFLAGS_COVERAGE)
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CFLAGS=$(CPPFLAGS) $(CFLAGS_CPU) $(CFLAGS_DEBUG) $(CFLAGS_WARN) $(CFLAGS_y)
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CFLAGS+= -ffunction-sections
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FTDIVERSION=$(shell $(PKG_CONFIG) --modversion libftdi1 2>/dev/null)
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ifneq ($(FTDIVERSION),)
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LIBFTDI_NAME=ftdi1
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else
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LIBFTDI_NAME=ftdi
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endif
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LIBFTDI_CFLAGS=$(shell $(PKG_CONFIG) --cflags lib${LIBFTDI_NAME})
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LIBFTDI_LDLIBS=$(shell $(PKG_CONFIG) --libs lib${LIBFTDI_NAME})
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BUILD_CFLAGS= $(LIBFTDI_CFLAGS) $(CPPFLAGS) -O3 $(CFLAGS_DEBUG) $(CFLAGS_WARN)
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HOST_CFLAGS=$(CPPFLAGS) -O3 $(CFLAGS_DEBUG) $(CFLAGS_WARN)
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LDFLAGS=-nostdlib -X --gc-sections
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BUILD_LDFLAGS=$(LIBFTDI_LDLIBS)
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HOST_TEST_LDFLAGS=-T core/host/host_exe.lds -lrt -pthread -rdynamic -lm\
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$(if $(TEST_COVERAGE),-fprofile-arcs,)
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