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openwrt/include/package.mk
Hauke Mehrtens 04f10eb796 build: set max-page-size linker flag to match target page size 
ELF binaries embed the maximum page size used during linking in the
PT_LOAD segment alignment. If this value is larger than the actual
system page size, the kernel will still load the binary but wastes
memory due to over-alignment. If it is smaller, the binary may fail
to load or cause incorrect behavior with features like RELRO.

Most architectures use 4KB pages, but loongarch64 uses 16KB pages
(CONFIG_PAGE_SIZE_16KB). Explicitly pass -z max-page-size to the
linker so that binaries are built with the correct page alignment for
the target, avoiding issues with RELRO segment padding and ensuring
correct memory mapping on the target system.

Before binutils 2.39 RELRO sections were padded to common page size
which is 4K on MIPS, with binutils 3.29 the padding was changed to
max page size which is 64K on MIPS. With this change we will pad them to
4K again.

This reduces the size of user space binaries in OpenWrt.
The size of the uncompressed root file system of a mips malta be build
decreased by about 20%.

old file size:
```
$ du -s build_dir/target-mips_24kc_musl/root-malta/
15844	build_dir/target-mips_24kc_musl/root-malta/
```

New file size:
```
$ du -s build_dir/target-mips_24kc_musl/root-malta/
12564	build_dir/target-mips_24kc_musl/root-malta/
```

The size of the image did not decrease much because of the strong
compression used by OpenWrt.

Link: https://github.com/openwrt/openwrt/pull/22800
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2026-04-08 00:34:59 +02:00

423 lines
14 KiB
Makefile
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# SPDX-License-Identifier: GPL-2.0-only
#
# Copyright (C) 2006-2020 OpenWrt.org
__package_mk:=1
all: $(if $(DUMP),dumpinfo,$(if $(CHECK),check,compile))
include $(INCLUDE_DIR)/download.mk
PKG_BUILD_DIR ?= $(BUILD_DIR)/$(if $(BUILD_VARIANT),$(PKG_NAME)-$(BUILD_VARIANT)/)$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
PKG_INSTALL_DIR ?= $(PKG_BUILD_DIR)/ipkg-install
PKG_BUILD_PARALLEL ?=
PKG_SKIP_DOWNLOAD=$(USE_SOURCE_DIR)$(USE_GIT_TREE)$(USE_GIT_SRC_CHECKOUT)
MAKE_J:=$(if $(MAKE_JOBSERVER),$(MAKE_JOBSERVER) $(if $(filter 3.% 4.0 4.1,$(MAKE_VERSION)),-j))
PKG_SOURCE_DATE_EPOCH:=$(if $(DUMP),,$(shell $(TOPDIR)/scripts/get_source_date_epoch.sh $(CURDIR)))
ifeq ($(strip $(PKG_BUILD_PARALLEL)),0)
PKG_JOBS?=-j1
else
PKG_JOBS?=$(if $(PKG_BUILD_PARALLEL),$(MAKE_J),-j1)
endif
PKG_BUILD_FLAGS?=
__unknown_flags=$(filter-out no-iremap no-mips16 gc-sections no-gc-sections lto no-lto no-mold,$(PKG_BUILD_FLAGS))
ifneq ($(__unknown_flags),)
$(error unknown PKG_BUILD_FLAGS: $(__unknown_flags))
endif
# $1=flagname, $2=default (0/1)
define pkg_build_flag
$(if $(filter no-$(1),$(PKG_BUILD_FLAGS)),0,$(if $(filter $(1),$(PKG_BUILD_FLAGS)),1,$(2)))
endef
ifeq ($(call pkg_build_flag,iremap,1),1)
IREMAP_CFLAGS = $(call iremap,$(PKG_BUILD_DIR),$(notdir $(PKG_BUILD_DIR)))
TARGET_CFLAGS += $(IREMAP_CFLAGS)
endif
ifdef CONFIG_USE_MIPS16
ifeq ($(call pkg_build_flag,mips16,1),1)
TARGET_ASFLAGS_DEFAULT = $(filter-out -mips16 -minterlink-mips16,$(TARGET_CFLAGS))
TARGET_CFLAGS += -mips16 -minterlink-mips16
TARGET_CXXFLAGS += -mips16 -minterlink-mips16
endif
endif
ifeq ($(call pkg_build_flag,gc-sections,$(if $(CONFIG_USE_GC_SECTIONS),1,0)),1)
TARGET_CFLAGS+= -ffunction-sections -fdata-sections
TARGET_CXXFLAGS+= -ffunction-sections -fdata-sections
TARGET_LDFLAGS+= -Wl,--gc-sections
endif
ifeq ($(call pkg_build_flag,lto,$(if $(CONFIG_USE_LTO),1,0)),1)
TARGET_CFLAGS+= -flto=auto -fno-fat-lto-objects
TARGET_CXXFLAGS+= -flto=auto -fno-fat-lto-objects
TARGET_LDFLAGS+= -flto=auto -fuse-linker-plugin
endif
ifdef CONFIG_USE_MOLD
ifeq ($(call pkg_build_flag,mold,1),1)
TARGET_LINKER:=mold
endif
endif
# loongarch64 sets CONFIG_PAGE_SIZE_16KB, all other targets set CONFIG_PAGE_SIZE_4KB only.
ifeq ($(ARCH),loongarch64)
TARGET_CFLAGS += -Wl,-z,max-page-size=16384
TARGET_LDFLAGS += -zmax-page-size=16384
else
TARGET_CFLAGS += -Wl,-z,max-page-size=4096
TARGET_LDFLAGS += -zmax-page-size=4096
endif
include $(INCLUDE_DIR)/hardening.mk
include $(INCLUDE_DIR)/prereq.mk
include $(INCLUDE_DIR)/unpack.mk
include $(INCLUDE_DIR)/depends.mk
ifneq ($(wildcard $(TOPDIR)/git-src/$(PKG_NAME)/.git),)
USE_GIT_SRC_CHECKOUT:=1
QUILT:=1
endif
ifneq ($(if $(CONFIG_SRC_TREE_OVERRIDE),$(wildcard ./git-src)),)
USE_GIT_TREE:=1
QUILT:=1
endif
ifdef USE_SOURCE_DIR
QUILT:=1
endif
ifneq ($(wildcard $(PKG_BUILD_DIR)/.source_dir),)
QUILT:=1
endif
include $(INCLUDE_DIR)/quilt.mk
find_library_dependencies = \
$(wildcard $(patsubst %,$(STAGING_DIR)/pkginfo/%.version, \
$(filter-out $(BUILD_PACKAGES), $(sort $(foreach dep4, \
$(sort $(foreach dep3, \
$(sort $(foreach dep2, \
$(sort $(foreach dep1, \
$(sort $(foreach dep0, \
$(Package/$(1)/depends), \
$(Package/$(dep0)/depends) $(dep0) \
)), \
$(Package/$(dep1)/depends) $(dep1) \
)), \
$(Package/$(dep2)/depends) $(dep2) \
)), \
$(Package/$(dep3)/depends) $(dep3) \
)), \
$(Package/$(dep4)/depends) $(dep4) \
))) \
))
PKG_DIR_NAME:=$(lastword $(subst /,$(space),$(CURDIR)))
STAMP_NO_AUTOREBUILD=$(wildcard $(PKG_BUILD_DIR)/.no_autorebuild)
PREV_STAMP_PREPARED:=$(if $(STAMP_NO_AUTOREBUILD),$(wildcard $(PKG_BUILD_DIR)/.prepared*))
ifneq ($(PREV_STAMP_PREPARED),)
STAMP_PREPARED:=$(PREV_STAMP_PREPARED)
CONFIG_AUTOREBUILD:=
else
STAMP_PREPARED=$(PKG_BUILD_DIR)/.prepared$(if $(QUILT)$(DUMP),,_$(shell $(call $(if $(CONFIG_AUTOREMOVE),find_md5_reproducible,find_md5),${CURDIR} $(PKG_FILE_DEPENDS),))_$(call confvar,CONFIG_AUTOREMOVE $(PKG_PREPARED_DEPENDS)))
endif
STAMP_CONFIGURED=$(PKG_BUILD_DIR)/.configured$(if $(DUMP),,_$(call confvar,$(PKG_CONFIG_DEPENDS)))
STAMP_CONFIGURED_WILDCARD=$(PKG_BUILD_DIR)/.configured_*
STAMP_BUILT:=$(PKG_BUILD_DIR)/.built
STAMP_INSTALLED:=$(STAGING_DIR)/stamp/.$(PKG_DIR_NAME)$(if $(BUILD_VARIANT),.$(BUILD_VARIANT),)_installed
STAGING_FILES_LIST:=$(PKG_DIR_NAME)$(if $(BUILD_VARIANT),.$(BUILD_VARIANT),).list
define CleanStaging
rm -f $(STAMP_INSTALLED)
@-(\
if [ -f $(STAGING_DIR)/packages/$(STAGING_FILES_LIST) ]; then \
$(SCRIPT_DIR)/clean-package.sh \
"$(STAGING_DIR)/packages/$(STAGING_FILES_LIST)" \
"$(STAGING_DIR)"; \
fi; \
)
endef
PKG_INSTALL_STAMP:=$(PKG_INFO_DIR)/$(PKG_DIR_NAME).$(if $(BUILD_VARIANT),$(BUILD_VARIANT),default).install
# Normalize package SOURCE entry to pack reproducible package
# If we are packing a package with OpenWrt buildroot:
# - Replace package/... with feeds/base/...
# If we are packing a package with SDK:
# - Replace feeds/.*_root/... with feeds/.*/... and remove
# the intermediate directory to reflect what the symbolic link
# points to.
# Example:
# Feed link: feeds/base_root/package -> feeds/base
# Package: feeds/base_root/package/system/uci -> feeds/base/system/uci
ifeq ($(DUMP),)
__pkg_base_path:=$(patsubst $(TOPDIR)/%,%,$(CURDIR))
__pkg_provider_path:=$(word 1,$(subst /, ,$(__pkg_base_path)))
ifeq ($(__pkg_provider_path), feeds)
__pkg_feed_path:=$(word 2,$(subst /, ,$(__pkg_base_path)))
__pkg_feed_name:=$(patsubst %_root,%,$(__pkg_feed_path))
ifneq (__pkg_feed_path, __pkg_feed_name)
__pkg_feed_realpath:=$(realpath $(TOPDIR)/feeds/$(__pkg_feed_name))
__pkg_feed_dir:=$(patsubst $(TOPDIR)/feeds/$(__pkg_feed_path)/%,%,$(__pkg_feed_realpath))
__pkg_path:=$(patsubst feeds/$(__pkg_feed_path)/$(__pkg_feed_dir)/%,%,$(__pkg_base_path))
else
__pkg_path:=$(patsubst feeds/$(__pkg_feed_path)/%,%,$(__pkg_base_path))
endif
__pkg_source_makefile:=$(TOPDIR)/feeds/$(__pkg_feed_name)/$(__pkg_path)
else ifeq ($(__pkg_provider_path), package)
__pkg_source_makefile:=$(TOPDIR)/feeds/base/$(patsubst package/%,%,$(__pkg_base_path))
endif
endif
include $(INCLUDE_DIR)/package-defaults.mk
include $(INCLUDE_DIR)/package-dumpinfo.mk
include $(INCLUDE_DIR)/package-pack.mk
include $(INCLUDE_DIR)/package-bin.mk
include $(INCLUDE_DIR)/autotools.mk
_pkg_target:=$(if $(QUILT),,.)
override MAKEFLAGS=
CONFIG_SITE:=$(INCLUDE_DIR)/site/$(ARCH)
CUR_MAKEFILE:=$(filter-out Makefile,$(firstword $(MAKEFILE_LIST)))
SUBMAKE:=$(NO_TRACE_MAKE) $(if $(CUR_MAKEFILE),-f $(CUR_MAKEFILE))
PKG_CONFIG_PATH=$(STAGING_DIR)/usr/lib/pkgconfig:$(STAGING_DIR)/usr/share/pkgconfig
unexport QUIET CONFIG_SITE
ifeq ($(DUMP)$(filter prereq clean refresh update,$(MAKECMDGOALS)),)
ifneq ($(if $(QUILT),,$(CONFIG_AUTOREBUILD)),)
define Build/Autoclean
$(PKG_BUILD_DIR)/.dep_files: $(STAMP_PREPARED)
$(call rdep,${CURDIR} $(PKG_FILE_DEPENDS),$(STAMP_PREPARED),$(PKG_BUILD_DIR)/.dep_files,-x "*/.dep_*")
$(if $(filter prepare,$(MAKECMDGOALS)),,$(call rdep,$(PKG_BUILD_DIR),$(STAMP_BUILT),,-x "*/.dep_*" -x "*/ipkg*"))
endef
endif
endif
ifdef USE_GIT_SRC_CHECKOUT
define Build/Prepare/Default
mkdir -p $(PKG_BUILD_DIR)
ln -s $(TOPDIR)/git-src/$(PKG_NAME)/.git $(PKG_BUILD_DIR)/.git
( cd $(PKG_BUILD_DIR); \
git checkout .; \
git submodule update --recursive; \
git submodule foreach git config --unset core.worktree; \
git submodule foreach git checkout .; \
)
endef
endif
ifdef USE_GIT_TREE
define Build/Prepare/Default
mkdir -p $(PKG_BUILD_DIR)
ln -s $(CURDIR)/git-src $(PKG_BUILD_DIR)/.git
( cd $(PKG_BUILD_DIR); \
git checkout .; \
git submodule update --recursive; \
git submodule foreach git config --unset core.worktree; \
git submodule foreach git checkout .; \
)
endef
endif
ifdef USE_SOURCE_DIR
define Build/Prepare/Default
rm -rf $(PKG_BUILD_DIR)
$(if $(wildcard $(USE_SOURCE_DIR)/*),,@echo "Error: USE_SOURCE_DIR=$(USE_SOURCE_DIR) path not found"; false)
ln -snf $(USE_SOURCE_DIR) $(PKG_BUILD_DIR)
touch $(PKG_BUILD_DIR)/.source_dir
endef
endif
define Build/Exports/Default
$(1) : export ACLOCAL_INCLUDE=$$(foreach p,$$(wildcard $$(STAGING_DIR)/usr/share/aclocal $$(STAGING_DIR)/usr/share/aclocal-* $$(STAGING_DIR_HOSTPKG)/share/aclocal $$(STAGING_DIR_HOSTPKG)/share/aclocal-* $$(STAGING_DIR)/host/share/aclocal $$(STAGING_DIR)/host/share/aclocal-*),-I $$(p))
$(1) : export STAGING_PREFIX=$$(STAGING_DIR)/usr
$(1) : export PATH=$$(TARGET_PATH_PKG)
$(1) : export CONFIG_SITE:=$$(CONFIG_SITE)
$(1) : export PKG_CONFIG_PATH:=$$(PKG_CONFIG_PATH)
$(1) : export PKG_CONFIG_LIBDIR:=$$(PKG_CONFIG_PATH)
$(1) : export GIT_CEILING_DIRECTORIES:=$$(BUILD_DIR)
endef
Build/Exports=$(Build/Exports/Default)
define Build/CoreTargets
STAMP_PREPARED:=$$(STAMP_PREPARED)
STAMP_CONFIGURED:=$$(STAMP_CONFIGURED)
$(if $(QUILT),$(Build/Quilt))
$(call Build/Autoclean)
$(call DefaultTargets)
$(call check_download_integrity)
download:
$(foreach hook,$(Hooks/Download),
$(call $(hook))$(sep)
)
$(STAMP_PREPARED) : export PATH=$$(TARGET_PATH_PKG)
$(STAMP_PREPARED): $(STAMP_PREPARED_DEPENDS)
@-rm -rf $(PKG_BUILD_DIR)
@mkdir -p $(PKG_BUILD_DIR)
touch $$@_check
$(foreach hook,$(Hooks/Prepare/Pre),$(call $(hook))$(sep))
$(Build/Prepare)
$(foreach hook,$(Hooks/Prepare/Post),$(call $(hook))$(sep))
touch $$@
$(call Build/Exports,$(STAMP_CONFIGURED))
$(STAMP_CONFIGURED): $(STAMP_PREPARED) $(STAMP_CONFIGURED_DEPENDS)
rm -f $(STAMP_CONFIGURED_WILDCARD)
$(CleanStaging)
$(foreach hook,$(Hooks/Configure/Pre),$(call $(hook))$(sep))
$(Build/Configure)
$(foreach hook,$(Hooks/Configure/Post),$(call $(hook))$(sep))
touch $$@
$(call Build/Exports,$(STAMP_BUILT))
$(STAMP_BUILT): $(STAMP_CONFIGURED) $(STAMP_BUILT_DEPENDS)
rm -f $$@
touch $$@_check
$(foreach hook,$(Hooks/Compile/Pre),$(call $(hook))$(sep))
$(Build/Compile)
$(foreach hook,$(Hooks/Compile/Post),$(call $(hook))$(sep))
$(Build/Install)
$(foreach hook,$(Hooks/Install/Post),$(call $(hook))$(sep))
touch $$@
$(STAMP_INSTALLED) : export PATH=$$(TARGET_PATH_PKG)
$(STAMP_INSTALLED): $(STAMP_BUILT)
rm -rf $(TMP_DIR)/stage-$(PKG_DIR_NAME)
mkdir -p $(TMP_DIR)/stage-$(PKG_DIR_NAME)/host $(STAGING_DIR)/packages
$(foreach hook,$(Hooks/InstallDev/Pre),\
$(call $(hook),$(TMP_DIR)/stage-$(PKG_DIR_NAME),$(TMP_DIR)/stage-$(PKG_DIR_NAME)/host)$(sep)\
)
$(call Build/InstallDev,$(TMP_DIR)/stage-$(PKG_DIR_NAME),$(TMP_DIR)/stage-$(PKG_DIR_NAME)/host)
$(foreach hook,$(Hooks/InstallDev/Post),\
$(call $(hook),$(TMP_DIR)/stage-$(PKG_DIR_NAME),$(TMP_DIR)/stage-$(PKG_DIR_NAME)/host)$(sep)\
)
if [ -f $(STAGING_DIR)/packages/$(STAGING_FILES_LIST) ]; then \
$(SCRIPT_DIR)/clean-package.sh \
"$(STAGING_DIR)/packages/$(STAGING_FILES_LIST)" \
"$(STAGING_DIR)"; \
fi
if [ -d $(TMP_DIR)/stage-$(PKG_DIR_NAME) ]; then \
(cd $(TMP_DIR)/stage-$(PKG_DIR_NAME); find ./ > $(TMP_DIR)/stage-$(PKG_DIR_NAME).files); \
$(call locked, \
mv $(TMP_DIR)/stage-$(PKG_DIR_NAME).files $(STAGING_DIR)/packages/$(STAGING_FILES_LIST) && \
$(CP) $(TMP_DIR)/stage-$(PKG_DIR_NAME)/* $(STAGING_DIR)/; \
,staging-dir); \
fi
rm -rf $(TMP_DIR)/stage-$(PKG_DIR_NAME)
touch $$@
ifdef Build/InstallDev
$(_pkg_target)compile: $(STAMP_INSTALLED)
endif
$(_pkg_target)prepare: $(STAMP_PREPARED)
$(_pkg_target)configure: $(STAMP_CONFIGURED)
$(_pkg_target)dist: $(STAMP_CONFIGURED)
$(_pkg_target)distcheck: $(STAMP_CONFIGURED)
ifneq ($(CONFIG_AUTOREMOVE),)
compile:
-touch -r $(PKG_BUILD_DIR)/.built $(PKG_BUILD_DIR)/.autoremove 2>/dev/null >/dev/null
$(FIND) $(PKG_BUILD_DIR) -mindepth 1 -maxdepth 1 -not '(' -type f -and -name '.*' -and -size 0 ')' -and -not -name '.pkgdir' -print0 | \
$(XARGS) -0 rm -rf
endif
endef
define Build/DefaultTargets
$(if $(PKG_SKIP_DOWNLOAD),,$(if $(strip $(PKG_SOURCE_URL)),$(call Download,default)))
$(if $(DUMP),,$(Build/CoreTargets))
define Build/DefaultTargets
endef
endef
define BuildPackage
$(eval $(Package/Default))
$(eval $(Package/$(1)))
# Add an implicit self-provide. apk can't handle self provides, be it
# versioned or virtual, so opt for a suffix instead. This allows several
# variants to provide the same virtual package without adding extra provides
# to the default one, e.g. wget implicitly provides wget-any and is marked as
# default, so wget-ssl can explicitly provide @wget-any as well.
$(eval PROVIDES:=$(strip @$(1)-any $(PROVIDES)))
ifndef Package/$(1)/description
define Package/$(1)/description
$(TITLE)
endef
endif
BUILD_PACKAGES += $(1)
$(STAMP_PREPARED): $$(if $(QUILT)$(DUMP),,$(call find_library_dependencies,$(1)))
$(foreach FIELD, TITLE CATEGORY SECTION VERSION,
ifeq ($($(FIELD)),)
$$(error Package/$(1) is missing the $(FIELD) field)
endif
)
$(if $(DUMP), \
$(if $(CHECK),,$(Dumpinfo/Package)), \
$(foreach target, \
$(if $(Package/$(1)/targets),$(Package/$(1)/targets), \
$(if $(PKG_TARGETS),$(PKG_TARGETS), ipkg) \
), $(BuildTarget/$(target)) \
) \
)
$(if $(PKG_HOST_ONLY),,$(call Build/DefaultTargets,$(1)))
endef
define pkg_install_files
$(foreach install_file,$(1),$(INSTALL_DIR) $(3)/`dirname $(install_file)`; $(INSTALL_DATA) $(2)/$(install_file) $(3)/`dirname $(install_file)`;)
endef
define pkg_install_bin
$(foreach install_apps,$(1),$(INSTALL_DIR) $(3)/`dirname $(install_apps)`; $(INSTALL_BIN) $(2)/$(install_apps) $(3)/`dirname $(install_apps)`;)
endef
Build/Prepare=$(call Build/Prepare/Default,)
Build/Configure=$(call Build/Configure/Default,)
Build/Compile=$(call Build/Compile/Default,$(if $(PKG_SUBDIRS),SUBDIRS='$$$$(wildcard $(PKG_SUBDIRS))'))
Build/Install=$(if $(PKG_INSTALL),$(call Build/Install/Default,))
Build/Dist=$(call Build/Dist/Default,)
Build/DistCheck=$(call Build/DistCheck/Default,)
.NOTPARALLEL:
.PHONY: prepare-package-install
prepare-package-install:
@mkdir -p $(PKG_INFO_DIR)
@rm -f $(PKG_INSTALL_STAMP)
@echo "$(filter-out essential nonshared,$(PKG_FLAGS))" > $(PKG_INSTALL_STAMP).flags
$(PACKAGE_DIR):
mkdir -p $@
compile: prepare-package-install
.install: .compile
install: compile
force-clean-build: FORCE
rm -rf $(PKG_BUILD_DIR)
clean-build: $(if $(wildcard $(PKG_BUILD_DIR)/.autoremove),force-clean-build)
clean: force-clean-build
$(CleanStaging)
$(call Build/UninstallDev,$(STAGING_DIR),$(STAGING_DIR)/host)
$(Build/Clean)
rm -f $(STAGING_DIR)/packages/$(STAGING_FILES_LIST)
dist:
$(Build/Dist)
distcheck:
$(Build/DistCheck)
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