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openwrtv4/target/sdk/Makefile
Jo-Philipp Wich 72d751cba9 build: rework library bundling 
Rework the bundle-libraries.sh implementation to use a more robust approach
for executing host binaries through the shipped ELF loader and libraries.

The previous approach relied on symlinks pointing to a wrapper script which
caused various issues, especially with multicall binaries as the original
argv[0] name was not preserved through the ld.so invocation. Another down-
side was the fact that the actual binaries got moved into another directory
which caused executables to fail looking up resources with paths relative
to the executable location.

The new library wrapper implements the following improvements:

 - Instead of symlinks pointing to a common wrapper, each ELF executable
   is now replaced by a unqiue shell script which retains the original
   program name getting called

 - Instead of letting ld.so invoke the ELF executable directly, launch
   the final ELF binary through a helper program which fixes up the argv[0]
   argument for the target program

 - Support sharing a common location for the bundled libraries instead of
   having one copy in each directory containing wrapped binaries

Finally modify the SDK build to wrap the staging_dir and toolchain binaries
which allows to use the SDK on systems with a different glibc version.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2017-01-10 12:27:28 +01:00

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Makefile
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#
# Copyright (C) 2006-2014 OpenWrt.org
# Copyright (C) 2016 LEDE Project
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk
include $(INCLUDE_DIR)/host.mk
include $(INCLUDE_DIR)/version.mk
override MAKEFLAGS=
SDK_NAME:=$(VERSION_DIST_SANITIZED)-sdk-$(if $(CONFIG_VERSION_FILENAMES),$(VERSION_NUMBER)-)$(BOARD)$(if $(SUBTARGET),-$(SUBTARGET))$(if $(GCCV),_gcc-$(GCCV))$(DIR_SUFFIX).$(HOST_OS)-$(HOST_ARCH)
SDK_BUILD_DIR:=$(BUILD_DIR)/$(SDK_NAME)
STAGING_SUBDIR_HOST := staging_dir/host
STAGING_SUBDIR_TOOLCHAIN := staging_dir/toolchain-$(ARCH)$(ARCH_SUFFIX)_gcc-$(GCCV)_$(LIBC)-$(LIBCV)$(if $(CONFIG_arm),_eabi)
EXCLUDE_DIRS:=*/ccache/* \
*/stamp \
*/stampfiles \
*/man \
*/info \
*/root-* \
initial \
*.install.clean \
*.install.flags \
*.install \
*/doc
SDK_DIRS = \
$(STAGING_SUBDIR_HOST) \
$(STAGING_SUBDIR_TOOLCHAIN)
BASE_FEED:=$(shell git config --get remote.origin.url 2>/dev/null | sed -ne 's/^/src-git base /p')
BASE_FEED:=$(if $(BASE_FEED),$(BASE_FEED),$(shell cd $(TOPDIR); LC_ALL=C git svn info 2>/dev/null | sed -ne 's/^URL: /src-gitsvn base /p'))
BASE_FEED:=$(if $(BASE_FEED),$(BASE_FEED),$(shell cd $(TOPDIR); LC_ALL=C svn info 2>/dev/null | sed -ne 's/^URL: /src-svn base /p'))
BASE_FEED:=$(if $(BASE_FEED),$(BASE_FEED),src-git base https://git.lede-project.org/source.git$(filter-out ;master,;$(shell git rev-parse --abbrev-ref HEAD)))
KDIR_BASE = $(patsubst $(TOPDIR)/%,%,$(LINUX_DIR))
KERNEL_FILES_ARCH = \
Makefile* \
module.lds \
Kbuild.platforms \
*/Platform \
include \
*/include \
scripts \
kernel/asm-offsets.s
KERNEL_FILES_BASE := \
.config \
Makefile \
scripts \
include \
Module.symvers \
modules.builtin \
$(addprefix arch/$(LINUX_KARCH)/,$(KERNEL_FILES_ARCH))
KERNEL_FILES := $(patsubst $(TOPDIR)/%,%,$(wildcard $(addprefix $(LINUX_DIR)/,$(KERNEL_FILES_BASE))))
all: compile
$(BIN_DIR)/$(SDK_NAME).tar.xz: clean
mkdir -p $(SDK_BUILD_DIR)/dl $(SDK_BUILD_DIR)/package
$(CP) -L $(INCLUDE_DIR) $(SCRIPT_DIR) $(SDK_BUILD_DIR)/
$(TAR) -cf - -C $(TOPDIR) \
`cd $(TOPDIR); find $(KDIR_BASE) -name \*.ko` \
`cd $(TOPDIR); find $(KDIR_BASE)/firmware/ -newer $(KDIR_BASE)/firmware/Makefile \
-type f -name '*.bin' -or -name '*.cis' -or -name '*.csp' -or -name '*.dsp' -or -name '*.fw'` \
$(foreach exclude,$(EXCLUDE_DIRS),--exclude="$(exclude)") \
$(SDK_DIRS) $(KERNEL_FILES) | \
$(TAR) -xf - -C $(SDK_BUILD_DIR)
(cd $(SDK_BUILD_DIR); find $(STAGING_SUBDIR_HOST)/bin $(STAGING_SUBDIR_HOST)/usr/bin \
$(STAGING_SUBDIR_TOOLCHAIN)/bin $(STAGING_SUBDIR_TOOLCHAIN)/*/bin $(STAGING_SUBDIR_TOOLCHAIN)/libexec \
-type f | $(XARGS) $(SCRIPT_DIR)/bundle-libraries.sh $(SDK_BUILD_DIR)/$(STAGING_SUBDIR_HOST))
@-( \
find \
$(SDK_BUILD_DIR)/$(STAGING_SUBDIR_HOST)/bin \
$(SDK_BUILD_DIR)/$(STAGING_SUBDIR_HOST)/usr/bin \
$(SDK_BUILD_DIR)/$(STAGING_SUBDIR_TOOLCHAIN)/bin \
$(SDK_BUILD_DIR)/$(STAGING_SUBDIR_TOOLCHAIN)/*/bin \
$(SDK_BUILD_DIR)/$(STAGING_SUBDIR_TOOLCHAIN)/libexec \
-type f; \
find \
$(SDK_BUILD_DIR)/$(STAGING_SUBDIR_HOST)/lib \
$(SDK_BUILD_DIR)/$(STAGING_SUBDIR_HOST)/usr/lib \
-type f -name \*.so\* -or -name \*.a; \
) | xargs strip 2>/dev/null >/dev/null
mkdir -p $(SDK_BUILD_DIR)/target/linux
$(CP) $(GENERIC_PLATFORM_DIR) $(PLATFORM_DIR) $(SDK_BUILD_DIR)/target/linux/
rm -rf \
$(SDK_BUILD_DIR)/target/linux/*/files* \
$(SDK_BUILD_DIR)/target/linux/*/patches*
./convert-config.pl $(TOPDIR)/.config > $(SDK_BUILD_DIR)/Config-build.in
$(CP) -L \
$(TOPDIR)/LICENSE \
$(TOPDIR)/rules.mk \
./files/Config.in \
./files/Makefile \
./files/include/prepare.mk \
./files/README.SDK \
$(SDK_BUILD_DIR)/
$(CP) \
$(TOPDIR)/package/Makefile \
$(TOPDIR)/package/libs/toolchain \
$(TOPDIR)/package/kernel/linux \
$(SDK_BUILD_DIR)/package/
-rm -f $(SDK_BUILD_DIR)/feeds.conf.default
$(if $(BASE_FEED),echo "$(BASE_FEED)" > $(SDK_BUILD_DIR)/feeds.conf.default)
if [ -f $(TOPDIR)/feeds.conf ]; then \
cat $(TOPDIR)/feeds.conf >> $(SDK_BUILD_DIR)/feeds.conf.default; \
else \
cat $(TOPDIR)/feeds.conf.default >> $(SDK_BUILD_DIR)/feeds.conf.default; \
fi
$(SED) 's,^# REVISION:=.*,REVISION:=$(REVISION),g' $(SDK_BUILD_DIR)/include/version.mk
$(SED) 's,^# SOURCE_DATE_EPOCH:=.*,SOURCE_DATE_EPOCH:=$(SOURCE_DATE_EPOCH),g' $(SDK_BUILD_DIR)/include/version.mk
$(SED) '/LINUX_VERMAGIC:=/ { s,unknown,$(LINUX_VERMAGIC),g }' $(SDK_BUILD_DIR)/include/kernel.mk
find $(SDK_BUILD_DIR) -name .git | $(XARGS) rm -rf
find $(SDK_BUILD_DIR) -name .svn | $(XARGS) rm -rf
find $(SDK_BUILD_DIR) -name CVS | $(XARGS) rm -rf
(cd $(BUILD_DIR); \
tar -I 'xz -7e' -cf $@ $(SDK_NAME); \
)
download:
prepare:
compile: $(BIN_DIR)/$(SDK_NAME).tar.xz
install: compile
clean:
rm -rf $(SDK_BUILD_DIR) $(BIN_DIR)/$(SDK_NAME).tar.xz
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