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openwrt/rules.mk
T
Paul Spooren 6c03a267b0 build: bpf: remap build paths in BTF line info 
CompileBPF calls clang with -g but without any prefix map. Stripping debug info
keeps .BTF and .BTF.ext, since libbpf needs them, and their line info carries
the absolute path of each source file. This makes BPF objects like qosify-bpf.o
depend on the build directory and breaks reproducibility:

  -/builder/shared-workdir/build/build_dir/.../qosify-bpf.c
  +/tmp/rebuilderd-openwrt.juCsuQ/src/build_dir/.../qosify-bpf.c

IREMAP_CFLAGS is not enough here: without CONFIG_REPRODUCIBLE_DEBUG_INFO it
only sets -fmacro-prefix-map, which leaves the line info alone, and it is empty
for external toolchains, which have no say over the host clang.  Unlike regular
debug info, BTF ships with the package, so always pass -ffile-prefix-map for
the build and staging directories.

Add an fremap helper next to iremap for that, and let IREMAP_STAGING_DIR and
CompileBPF share the map of the staging directory, so they cannot drift apart.

Link: https://github.com/openwrt/openwrt/pull/25359
Signed-off-by: Paul Spooren <mail@aparcar.org>
2026-09-25 09:13:47 +02:00

642 lines
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Makefile
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# SPDX-License-Identifier: GPL-2.0-only
#
# Copyright (C) 2006-2010 OpenWrt.org
# Copyright (C) 2016 LEDE Project
ifneq ($(__rules_inc),1)
__rules_inc=1
ifeq ($(DUMP),)
-include $(TOPDIR)/.config
endif
include $(TOPDIR)/include/debug.mk
include $(TOPDIR)/include/verbose.mk
ifneq ($(filter check,$(MAKECMDGOALS)),)
CHECK:=1
DUMP:=1
endif
export TMP_DIR:=$(TOPDIR)/tmp
export TMPDIR:=$(TMP_DIR)
##@
# @brief Strip quotes `"` and pounds `#` from string.
#
# @param 1: String.
##
qstrip=$(strip $(subst ",,$(1)))
#"))
empty:=
space:= $(empty) $(empty)
comma:=,
pound:=\#
##@
# @brief Merge strings by removing spaces.
#
# @param 1: String.
##
merge=$(subst $(space),,$(1))
##@
# @brief Get hash sum of variable list.
#
# @param 1: List of variable names.
#
# The variables are config symbols, which do not change during a make call,
# so the hash of each list is computed only once.
##
confvar_key=confvar/$(subst $(space),+,$(strip $(1)))
confvar=$(if $(filter undefined,$(origin $(confvar_key))),$(eval $(confvar_key):=$(shell echo '$(foreach v,$(1),$(v)=$(subst ','\'',$($(v))))' | $(MKHASH) md5)))$($(confvar_key))
##@
# @brief Strip last extension from file name.
#
# @param 1: File name.
##
strip_last=$(patsubst %.$(lastword $(subst .,$(space),$(1))),%,$(1))
paren_left = (
paren_right = )
chars_lower = a b c d e f g h i j k l m n o p q r s t u v w x y z
chars_upper = A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
define sep
endef
define newline
endef
__tr_list = $(join $(join $(1),$(foreach char,$(1),$(comma))),$(2))
__tr_head_stripped = $(subst $(space),,$(foreach cv,$(call __tr_list,$(1),$(2)),$$$(paren_left)subst$(cv)$(comma)))
__tr_head = $(subst $(paren_left)subst,$(paren_left)subst$(space),$(__tr_head_stripped))
__tr_tail = $(subst $(space),,$(foreach cv,$(1),$(paren_right)))
__tr_template = $(__tr_head)$$(1)$(__tr_tail)
##@
# @brief Convert string characters to upper.
##
$(eval toupper = $(call __tr_template,$(chars_lower),$(chars_upper)))
##@
# @brief Convert string characters to lower.
##
$(eval tolower = $(call __tr_template,$(chars_upper),$(chars_lower)))
##@
# @brief Abbreviate version. Truncate to 8 characters.
##
version_abbrev = $(if $(if $(CHECK),,$(DUMP)),$(1),$(shell printf '%.8s' $(1)))
_SINGLE=export MAKEFLAGS=$(space);
CFLAGS:=
ARCH:=$(subst i486,i386,$(subst i586,i386,$(subst i686,i386,$(call qstrip,$(CONFIG_ARCH)))))
ARCH_PACKAGES:=$(call qstrip,$(CONFIG_TARGET_ARCH_PACKAGES))
BOARD:=$(call qstrip,$(CONFIG_TARGET_BOARD))
SUBTARGET:=$(call qstrip,$(CONFIG_TARGET_SUBTARGET))
TARGET_OPTIMIZATION:=$(call qstrip,$(CONFIG_TARGET_OPTIMIZATION))
TARGET_SUFFIX=$(call qstrip,$(CONFIG_TARGET_SUFFIX))
BUILD_SUFFIX:=$(call qstrip,$(CONFIG_BUILD_SUFFIX))
SUBDIR:=$(patsubst $(TOPDIR)/%,%,${CURDIR})
BUILD_SUBDIR:=$(patsubst $(TOPDIR)/%,%,${CURDIR})
NPROC=$(eval NPROC:=$$(shell sysctl -n hw.ncpu 2>/dev/null || nproc))$(NPROC)
export SHELL:=/usr/bin/env bash
IS_PACKAGE_BUILD := $(if $(filter package/%,$(BUILD_SUBDIR)),1)
OPTIMIZE_FOR_CPU=$(subst i386,i486,$(ARCH))
ifneq (,$(findstring $(ARCH) , aarch64 aarch64_be powerpc ))
FPIC:=-DPIC -fPIC
else
FPIC:=-DPIC -fpic
endif
HOST_FPIC:=-DPIC -fPIC
ARCH_SUFFIX:=$(call qstrip,$(CONFIG_CPU_TYPE))
GCC_ARCH:=
ifneq ($(ARCH_SUFFIX),)
ARCH_SUFFIX:=_$(ARCH_SUFFIX)
endif
ifneq ($(filter -march=armv%,$(TARGET_OPTIMIZATION)),)
GCC_ARCH:=$(patsubst -march=%,%,$(filter -march=armv%,$(TARGET_OPTIMIZATION)))
endif
ifdef CONFIG_HAS_SPE_FPU
TARGET_SUFFIX:=$(TARGET_SUFFIX)spe
endif
ifdef CONFIG_MIPS64_ABI
ifneq ($(CONFIG_MIPS64_ABI_O32),y)
ARCH_SUFFIX:=$(ARCH_SUFFIX)_$(call qstrip,$(CONFIG_MIPS64_ABI))
endif
endif
DEFAULT_SUBDIR_TARGETS:=clean download prepare compile update refresh prereq dist distcheck configure check check-depends
##@
# @brief Create default targets.
#
# Targets are created from @DEFAULT_SUBDIR_TARGETS and input argument lists.
#
# @param 1: Additional targets list.
##
define DefaultTargets
$(foreach t,$(DEFAULT_SUBDIR_TARGETS) $(1),
.$(t):
$(t): .$(t)
.PHONY: $(t) .$(t)
)
endef
DL_DIR=$(if $(call qstrip,$(CONFIG_DOWNLOAD_FOLDER)),$(call qstrip,$(CONFIG_DOWNLOAD_FOLDER)),$(TOPDIR)/dl)$(if $(DL_SUBDIR),/$(DL_SUBDIR))
OUTPUT_DIR:=$(if $(call qstrip,$(CONFIG_BINARY_FOLDER)),$(call qstrip,$(CONFIG_BINARY_FOLDER)),$(TOPDIR)/bin)
BIN_DIR:=$(OUTPUT_DIR)/targets/$(BOARD)/$(SUBTARGET)
INCLUDE_DIR:=$(TOPDIR)/include
SCRIPT_DIR:=$(TOPDIR)/scripts
BUILD_DIR_BASE:=$(TOPDIR)/build_dir
ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
GCCV:=$(call qstrip,$(CONFIG_GCC_VERSION))
LIBC:=$(call qstrip,$(CONFIG_LIBC))
REAL_GNU_TARGET_NAME=$(OPTIMIZE_FOR_CPU)-openwrt-linux$(if $(TARGET_SUFFIX),-$(TARGET_SUFFIX))
GNU_TARGET_NAME=$(OPTIMIZE_FOR_CPU)-openwrt-linux
DIR_SUFFIX:=_$(LIBC)$(if $(CONFIG_arm),_eabi)
BIN_DIR:=$(BIN_DIR)$(if $(CONFIG_USE_MUSL),,-$(LIBC))
TARGET_DIR_NAME = target-$(ARCH)$(ARCH_SUFFIX)$(DIR_SUFFIX)$(if $(BUILD_SUFFIX),_$(BUILD_SUFFIX))
TOOLCHAIN_DIR_NAME = toolchain-$(ARCH)$(ARCH_SUFFIX)_gcc-$(GCCV)$(DIR_SUFFIX)
else
ifeq ($(CONFIG_NATIVE_TOOLCHAIN),)
GNU_TARGET_NAME=$(call qstrip,$(CONFIG_TARGET_NAME))
else
GNU_TARGET_NAME=$(shell gcc -dumpmachine)
endif
REAL_GNU_TARGET_NAME=$(GNU_TARGET_NAME)
LIBC:=$(call qstrip,$(CONFIG_LIBC))
TARGET_DIR_NAME:=target-$(GNU_TARGET_NAME)_$(LIBC)$(if $(BUILD_SUFFIX),_$(BUILD_SUFFIX))
TOOLCHAIN_DIR_NAME:=toolchain-$(GNU_TARGET_NAME)
endif
ifeq ($(or $(CONFIG_EXTERNAL_TOOLCHAIN),$(CONFIG_TARGET_uml)),)
iremap = -f$(if $(CONFIG_REPRODUCIBLE_DEBUG_INFO),file,macro)-prefix-map=$(1)=$(2)
endif
# Unlike iremap, always rewrite the paths in the debug information, for output
# that ships with it, such as the BTF of BPF objects.
fremap = -ffile-prefix-map=$(1)=$(2)
# A header taken from the staging directory reaches __FILE__ and the debug
# information with its absolute path, which no other map covers. Keep the
# staging_dir element, so that the result stays apart from the map of
# BUILD_DIR, whose last element carries the same name.
#
# @param 1: Name of the map helper, iremap or fremap.
remap_staging_dir = $(call $(1),$(STAGING_DIR),staging_dir/$(notdir $(STAGING_DIR)))
IREMAP_STAGING_DIR = $(call remap_staging_dir,iremap)
PACKAGE_DIR?=$(BIN_DIR)/packages
PACKAGE_DIR_ALL?=$(TOPDIR)/staging_dir/packages/$(BOARD)
BUILD_DIR:=$(BUILD_DIR_BASE)/$(TARGET_DIR_NAME)
STAGING_DIR:=$(TOPDIR)/staging_dir/$(TARGET_DIR_NAME)
BUILD_DIR_TOOLCHAIN:=$(BUILD_DIR_BASE)/$(TOOLCHAIN_DIR_NAME)
TOOLCHAIN_DIR:=$(TOPDIR)/staging_dir/$(TOOLCHAIN_DIR_NAME)
STAMP_DIR:=$(BUILD_DIR)/stamp
STAMP_DIR_HOST=$(BUILD_DIR_HOST)/stamp
TARGET_ROOTFS_DIR?=$(if $(call qstrip,$(CONFIG_TARGET_ROOTFS_DIR)),$(call qstrip,$(CONFIG_TARGET_ROOTFS_DIR)),$(BUILD_DIR))
TARGET_DIR:=$(TARGET_ROOTFS_DIR)/root-$(BOARD)
STAGING_DIR_ROOT:=$(STAGING_DIR)/root-$(BOARD)
STAGING_DIR_IMAGE:=$(STAGING_DIR)/image
BUILD_LOG_DIR:=$(if $(call qstrip,$(CONFIG_BUILD_LOG_DIR)),$(call qstrip,$(CONFIG_BUILD_LOG_DIR)),$(TOPDIR)/logs)
PKG_INFO_DIR := $(STAGING_DIR)/pkginfo
# Set BUILD_TIME_LOG=<file> in the environment to record a begin and an end
# event for every prepare, configure, compile and install stage. Turn the log
# into a report with scripts/build-time-report.pl.
ifneq ($(BUILD_TIME_LOG),)
BUILD_TIME_LOG_FILE:=$(if $(filter /%,$(BUILD_TIME_LOG)),$(BUILD_TIME_LOG),$(TOPDIR)/$(BUILD_TIME_LOG))
BuildTimeLog = @$(SCRIPT_DIR)/build-time-log.sh $(BUILD_TIME_LOG_FILE) $(1) $(2) "$(if $(BUILD_SUBDIR),$(BUILD_SUBDIR),$(CURDIR))$(if $(BUILD_VARIANT),/$(BUILD_VARIANT))"
else
BuildTimeLog =
endif
# A package that sets PKG_CONFIGURE_CACHE or HOST_CONFIGURE_CACHE keeps the
# autoconf result cache of its configure checks, so a package that is cleaned
# and built again reads the answers instead of running the checks. The cache
# lives in tmp/, which dirclean removes, so a full reset of the tree starts
# from cold answers.
#
# The path covers everything that changes an answer: the toolchain for a target
# package, the host compiler for a host package, and a hash of the configure
# arguments and build flags for both. include/site/cache also starts from a
# cold cache when the configure script or a precious variable changed.
#
# A package must opt in, because a cache is only correct for a configure script
# that keeps its side effects outside the AC_CACHE_VAL body. ncurses appends
# -D_XOPEN_SOURCE to CPPFLAGS inside that body, so a cached run restores the
# value, skips the append and then fails to compile. Read the note above
# PKG_CONFIGURE_CACHE in package.mk before you opt a package in.
#
# Set CONFIGURE_CACHE_DIR to a path of your own to keep the cache elsewhere, or
# to the empty string to run every check again.
ifeq ($(origin CONFIGURE_CACHE_DIR),undefined)
CONFIGURE_CACHE_DIR:=$(TMP_DIR)/configure-cache
endif
ifneq ($(CONFIGURE_CACHE_DIR),)
CONFIGURE_CACHE_BASE:=$(if $(filter /%,$(CONFIGURE_CACHE_DIR)),$(CONFIGURE_CACHE_DIR),$(TOPDIR)/$(CONFIGURE_CACHE_DIR))
strhash=$(shell printf '%s' '$(subst ','\'',$(1))' | $(MKHASH) md5)
endif
BUILD_DIR_HOST:=$(if $(IS_PACKAGE_BUILD),$(BUILD_DIR_BASE)/hostpkg,$(BUILD_DIR_BASE)/host)
STAGING_DIR_HOST:=$(abspath $(STAGING_DIR)/../host)
STAGING_DIR_HOSTPKG:=$(abspath $(STAGING_DIR)/../hostpkg)
TARGET_PATH:=$(subst $(space),:,$(filter-out .,$(filter-out ./,$(subst :,$(space),$(PATH)))))
TARGET_INIT_PATH:=$(call qstrip,$(CONFIG_TARGET_INIT_PATH))
TARGET_INIT_PATH:=$(if $(TARGET_INIT_PATH),$(TARGET_INIT_PATH),/usr/sbin:/sbin:/usr/bin:/bin)
TARGET_CFLAGS:=$(TARGET_OPTIMIZATION)$(if $(CONFIG_DEBUG), -g3) $(call qstrip,$(CONFIG_EXTRA_OPTIMIZATION))
TARGET_CXXFLAGS = $(TARGET_CFLAGS)
TARGET_ASFLAGS_DEFAULT = $(TARGET_CFLAGS)
TARGET_ASFLAGS = $(TARGET_ASFLAGS_DEFAULT)
ifneq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
LIBGCC_S_PATH=$(realpath $(wildcard $(call qstrip,$(CONFIG_LIBGCC_ROOT_DIR))/$(call qstrip,$(CONFIG_LIBGCC_FILE_SPEC))))
LIBGCC_S=$(if $(LIBGCC_S_PATH),-L$(dir $(LIBGCC_S_PATH)) -lgcc_s)
LIBGCC_A=$(realpath $(lastword $(wildcard $(dir $(LIBGCC_S_PATH))/gcc/*/*/libgcc.a)))
else
LIBGCC_A=$(lastword $(wildcard $(TOOLCHAIN_DIR)/lib/gcc/*/*/libgcc.a))
LIBGCC_S=$(if $(wildcard $(TOOLCHAIN_DIR)/lib/libgcc_s.so),-L$(TOOLCHAIN_DIR)/lib -lgcc_s,$(LIBGCC_A))
endif
ifeq ($(CONFIG_ARCH_64BIT),y)
LIB_SUFFIX:=64
endif
ifndef DUMP
ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
-include $(TOOLCHAIN_DIR)/info.mk
export GCC_HONOUR_COPTS:=0
TARGET_CROSS:=$(if $(TARGET_CROSS),$(TARGET_CROSS),$(OPTIMIZE_FOR_CPU)-openwrt-linux$(if $(TARGET_SUFFIX),-$(TARGET_SUFFIX))-)
TOOLCHAIN_ROOT_DIR:=$(TOPDIR)/staging_dir/$(TOOLCHAIN_DIR_NAME)
TOOLCHAIN_BIN_DIRS:=$(TOOLCHAIN_ROOT_DIR)/bin
TOOLCHAIN_INC_DIRS:=$(TOOLCHAIN_ROOT_DIR)/usr/include $(TOOLCHAIN_ROOT_DIR)/include
TOOLCHAIN_LIB_DIRS:=$(TOOLCHAIN_ROOT_DIR)/usr/lib $(TOOLCHAIN_ROOT_DIR)/lib
TARGET_CFLAGS+= -fhonour-copts
ifeq ($(CONFIG_USE_MUSL),y)
TOOLCHAIN_INC_DIRS+= $(TOOLCHAIN_DIR)/include/fortify
endif
else
ifeq ($(CONFIG_NATIVE_TOOLCHAIN),)
-include $(TOOLCHAIN_DIR)/info.mk
TARGET_CROSS:=$(call qstrip,$(CONFIG_TOOLCHAIN_PREFIX))
TOOLCHAIN_ROOT_DIR:=$(call qstrip,$(CONFIG_TOOLCHAIN_ROOT))
TOOLCHAIN_BIN_DIRS:=$(patsubst ./%,$(TOOLCHAIN_ROOT_DIR)/%,$(call qstrip,$(CONFIG_TOOLCHAIN_BIN_PATH)))
TOOLCHAIN_INC_DIRS:=$(patsubst ./%,$(TOOLCHAIN_ROOT_DIR)/%,$(call qstrip,$(CONFIG_TOOLCHAIN_INC_PATH)))
TOOLCHAIN_LIB_DIRS:=$(patsubst ./%,$(TOOLCHAIN_ROOT_DIR)/%,$(call qstrip,$(CONFIG_TOOLCHAIN_LIB_PATH)))
endif
endif
ifneq ($(TOOLCHAIN_BIN_DIRS),)
TARGET_PATH:=$(subst $(space),:,$(TOOLCHAIN_BIN_DIRS)):$(TARGET_PATH)
endif
ifneq ($(TOOLCHAIN_INC_DIRS),)
TARGET_CPPFLAGS+= $(patsubst %,-I%,$(TOOLCHAIN_INC_DIRS))
endif
ifneq ($(TOOLCHAIN_LIB_DIRS),)
TARGET_LDFLAGS+= $(patsubst %,-L%,$(TOOLCHAIN_LIB_DIRS))
endif
endif
TARGET_LINKER?=bfd
TARGET_LDFLAGS+= -fuse-ld=$(TARGET_LINKER)
TARGET_PATH_PKG:=$(STAGING_DIR)/host/bin:$(STAGING_DIR_HOSTPKG)/bin:$(TARGET_PATH)
ifeq ($(CONFIG_SOFT_FLOAT),y)
SOFT_FLOAT_CONFIG_OPTION:=--with-float=soft
ifeq ($(CONFIG_arm),y)
TARGET_CFLAGS+= -mfloat-abi=soft
else
TARGET_CFLAGS+= -msoft-float
endif
else
SOFT_FLOAT_CONFIG_OPTION:=
ifeq ($(CONFIG_arm),y)
TARGET_CFLAGS+= -mfloat-abi=hard
endif
endif
export ORIG_PATH:=$(if $(ORIG_PATH),$(ORIG_PATH),$(PATH))
export PATH:=$(TARGET_PATH)
export STAGING_DIR STAGING_DIR_HOST STAGING_DIR_HOSTPKG
export SH_FUNC:=. $(INCLUDE_DIR)/shell.sh;
PKG_CONFIG:=$(STAGING_DIR_HOST)/bin/pkg-config
export PKG_CONFIG
HOST_FLAGS_OPT:=$(if $(CONFIG_OPTIMIZE_HOST_TOOLS),$(call qstrip,$(CONFIG_HOST_FLAGS_OPT)),-O2)
HOST_FLAGS_STRIP:=$(call qstrip,$(CONFIG_HOST_FLAGS_STRIP))
HOST_EXTRA_CFLAGS:=$(call qstrip,$(CONFIG_HOST_EXTRA_CFLAGS))
HOST_EXTRA_CXXFLAGS:=$(call qstrip,$(CONFIG_HOST_EXTRA_CXXFLAGS))
HOST_EXTRA_CPPFLAGS:=$(call qstrip,$(CONFIG_HOST_EXTRA_CPPFLAGS))
HOST_EXTRA_LDFLAGS:=$(call qstrip,$(CONFIG_HOST_EXTRA_LDFLAGS))
HOSTCC:=$(STAGING_DIR_HOST)/bin/gcc
HOSTCXX:=$(STAGING_DIR_HOST)/bin/g++
HOST_CPPFLAGS:=$(strip -I$(STAGING_DIR_HOST)/include $(if $(IS_PACKAGE_BUILD),-I$(STAGING_DIR_HOSTPKG)/include -I$(STAGING_DIR)/host/include) $(HOST_EXTRA_CPPFLAGS))
HOST_CFLAGS:=$(strip $(HOST_FLAGS_OPT) $(HOST_EXTRA_CFLAGS) $(HOST_CPPFLAGS) $(HOST_FLAGS_STRIP))
HOST_CXXFLAGS:=$(strip $(HOST_CFLAGS) $(HOST_EXTRA_CXXFLAGS))
HOST_LDFLAGS:=$(strip -L$(STAGING_DIR_HOST)/lib $(if $(IS_PACKAGE_BUILD),-L$(STAGING_DIR_HOSTPKG)/lib -L$(STAGING_DIR)/host/lib) $(HOST_EXTRA_LDFLAGS) $(HOST_FLAGS_STRIP))
BUILD_KEY=$(TOPDIR)/key-build
BUILD_KEY_APK_SEC=$(TOPDIR)/private-key.pem
BUILD_KEY_APK_PUB=$(TOPDIR)/public-key.pem
FAKEROOT:=$(STAGING_DIR_HOST)/bin/fakeroot
TARGET_AR:=$(TARGET_CROSS)gcc-ar
TARGET_RANLIB:=$(TARGET_CROSS)gcc-ranlib
TARGET_NM:=$(TARGET_CROSS)gcc-nm
TARGET_CC:=$(TARGET_CROSS)gcc
TARGET_CXX:=$(TARGET_CROSS)g++
TARGET_LD:=$(TARGET_CROSS)ld.$(TARGET_LINKER)
KPATCH:=$(SCRIPT_DIR)/patch-kernel.sh
CACHE_RUN:=$(SCRIPT_DIR)/cache-run.sh
FILECMD:=$(STAGING_DIR_HOST)/bin/file
SED:=$(STAGING_DIR_HOST)/bin/sed -i -e
ESED:=$(STAGING_DIR_HOST)/bin/sed -E -i -e
MKHASH:=$(STAGING_DIR_HOST)/bin/mkhash
# MKHASH is used in /scripts, so we export it here.
export MKHASH
CP:=cp -fpR
LN:=ln -sf
XARGS:=xargs -r
BASH:=bash
TAR:=tar
FIND:=find
PATCH:=patch
PYTHON:=python3
ifeq ($(HOST_OS),Darwin)
TRUE:=/usr/bin/env gtrue
FALSE:=/usr/bin/env gfalse
else
TRUE:=/usr/bin/env true
FALSE:=/usr/bin/env false
endif
INSTALL_BIN:=install -m0755
INSTALL_SUID:=install -m4755
INSTALL_DIR:=install -d -m0755
INSTALL_DATA:=install -m0644
INSTALL_CONF:=install -m0600
TARGET_CC_NOCACHE:=$(TARGET_CC)
TARGET_CXX_NOCACHE:=$(TARGET_CXX)
HOSTCC_NOCACHE:=$(HOSTCC)
HOSTCXX_NOCACHE:=$(HOSTCXX)
export TARGET_CC_NOCACHE
export TARGET_CXX_NOCACHE
export HOSTCC_NOCACHE
export HOSTCXX_NOCACHE
# A new host compiler behind an unchanged name changes what a configure check
# answers, and autoconf does not detect that. gcc 14 turned an implicit function
# declaration into an error, which changed many of those answers. The configure
# cache of a host package is therefore keyed on the compiler as well. prereq
# builds mkhash and links the compiler into staging_dir, so both exist by the
# time a configure recipe asks for this.
host_cc_id = $(if $(filter undefined,$(origin __host_cc_id)),$(eval __host_cc_id:=$(shell $(HOSTCC_NOCACHE) --version 2>/dev/null | head -1 | $(MKHASH) md5)))$(__host_cc_id)
ifneq ($(CONFIG_CCACHE),)
TARGET_CC:= ccache $(TARGET_CC)
TARGET_CXX:= ccache $(TARGET_CXX)
HOSTCC:= ccache $(HOSTCC)
HOSTCXX:= ccache $(HOSTCXX)
export CCACHE_NOCOMPRESS:=true
export CCACHE_BASEDIR:=$(TOPDIR)
export CCACHE_DIR:=$(if $(call qstrip,$(CONFIG_CCACHE_DIR)),$(call qstrip,$(CONFIG_CCACHE_DIR)),$(TOPDIR)/.ccache)
endif
TARGET_CONFIGURE_OPTS = \
AR="$(TARGET_AR)" \
AS="$(TARGET_CC) -c $(TARGET_ASFLAGS)" \
LD="$(TARGET_LD)" \
NM="$(TARGET_NM)" \
CC="$(TARGET_CC)" \
GCC="$(TARGET_CC)" \
CXX="$(TARGET_CXX)" \
RANLIB="$(TARGET_RANLIB)" \
STRIP=$(TARGET_CROSS)strip \
OBJCOPY=$(TARGET_CROSS)objcopy \
OBJDUMP=$(TARGET_CROSS)objdump \
SIZE=$(TARGET_CROSS)size
# strip an entire directory
ifneq ($(CONFIG_NO_STRIP),)
RSTRIP:=:
STRIP:=:
else
ifneq ($(CONFIG_USE_STRIP),)
STRIP:=$(TARGET_CROSS)strip $(call qstrip,$(CONFIG_STRIP_ARGS))
else
ifneq ($(CONFIG_USE_SSTRIP),)
STRIP:=$(STAGING_DIR_HOST)/bin/sstrip $(if $(CONFIG_SSTRIP_DISCARD_TRAILING_ZEROES),-z)
endif
endif
RSTRIP= \
export CROSS="$(TARGET_CROSS)" \
$(if $(PKG_BUILD_ID),KEEP_BUILD_ID=1) \
$(if $(CONFIG_KERNEL_KALLSYMS),NO_RENAME=1) \
$(if $(CONFIG_KERNEL_PROFILING),KEEP_SYMBOLS=1); \
NM="$(TARGET_CROSS)nm" \
STRIP="$(STRIP)" \
STRIP_KMOD="$(SCRIPT_DIR)/strip-kmod.sh" \
PATCHELF="$(STAGING_DIR_HOST)/bin/patchelf" \
$(SCRIPT_DIR)/rstrip.sh
endif
NINJA = \
MAKEFLAGS="$(MAKE_JOBSERVER)" \
$(STAGING_DIR_HOST)/bin/ninja \
$(if $(findstring c,$(OPENWRT_VERBOSE)),-v) \
$(if $(MAKE_JOBSERVER),,-j1)
ifeq ($(CONFIG_IPV6),y)
DISABLE_IPV6:=
else
DISABLE_IPV6:=--disable-ipv6
endif
TAR_OPTIONS:=-xf -
ifeq ($(CONFIG_BUILD_LOG),y)
BUILD_LOG:=1
endif
export BISON_PKGDATADIR:=$(STAGING_DIR_HOST)/share/bison
export HOST_GNULIB_SRCDIR:=$(STAGING_DIR_HOST)/share/gnulib
export M4:=$(STAGING_DIR_HOST)/bin/m4
##@
# @brief Slugify variable name and prepend suffix.
##
define shvar
V_$(subst .,_,$(subst -,_,$(subst /,_,$(1))))
endef
##@
# @brief Create and export variable, set to function result.
#
# @param 1: Function name. Used as variable name, prepended with `V_`.
##
define shexport
export $(call shvar,$(1))=$$(call $(1))
endef
##@
# @brief Support 64 bit tine in C code.
#
# Test support for 64-bit time with C code from largefile.m4 provided by GNU Gnulib
# the value is `y` when successful and `` otherwise
##
define YEAR_2038
$(shell \
{ \
echo '$(pound) include <time.h>'; \
echo '$(pound) define LARGE_TIME_T ((time_t) (((time_t) 1 << 30) - 1 + 3 * ((time_t) 1 << 30)))'; \
echo 'int verify_time_t_range[(LARGE_TIME_T / 65537 == 65535 && LARGE_TIME_T % 65537 == 0) ? 1 : -1];'; \
echo 'int main (void) {return 0;}'; \
} | $(HOSTCC) -x c - -o /dev/null 2>/dev/null && echo y; \
)
endef
##@
# @brief Execute commands under flock
#
# @param 1: The shell expression.
# @param 2: The lock name. If not given, the global lock will be used.
##
ifneq ($(wildcard $(STAGING_DIR_HOST)/bin/flock),)
define locked
SHELL= \
flock \
$(TMP_DIR)/.$(if $(2),$(strip $(2)),global).flock \
-c '$(subst ','\'',$(1))'
endef
else
locked=$(1)
endif
##@
# @brief Recursively copy paths into another directory, purge dangling
# symlinks before.
#
# @param 1: File glob expression.
# @param 1: Destination directory.
##
define file_copy
for src_dir in $(sort $(foreach d,$(wildcard $(1)),$(dir $(d)))); do \
( cd $$src_dir; find -type f -or -type d ) | \
( cd $(2); while :; do \
read FILE; \
[ -z "$$FILE" ] && break; \
[ -L "$$FILE" ] || continue; \
echo "Removing symlink $(2)/$$FILE"; \
rm -f "$$FILE"; \
done; ); \
done; \
$(CP) $(1) $(2)
endef
##@
# @brief Copy a file over another one only when the content differs, so that
# the destination keeps its timestamp.
#
# @param 1: Source file.
# @param 2: Destination file.
##
define cp_if_changed
{ cmp -s $(1) $(2) || cp $(1) $(2); }
endef
##@
# @brief Calculate sha256sum of any plain file within a given directory.
#
# @param 1: Input directory.
# @param 2: If set, recurse into subdirectories.
##
define sha256sums
(cd $(1); \
[ -f sha256sums ] && [ -z "$$(find . $(if $(2),,-maxdepth 1) \
-not -name 'sha256sums' -newer sha256sums -print -quit)" ] || \
find . $(if $(2),,-maxdepth 1) -type f -not -name 'sha256sums' -printf "%P\n" | sort | \
xargs -r $(MKHASH) -n sha256 | sed -ne 's!^\(.*\) \(.*\)$$!\1 *\2!p' > sha256sums)
endef
##@
# @brief Retrieve file extension.
#
# @param 1: File name.
##
ext=$(word $(words $(subst ., ,$(1))),$(subst ., ,$(1)))
##@
# @brief Count Git commits of a package.
#
# @param 1: if non-empty: count commits since last ": [uU]pdate to "
# or ": [bB]ump to " in commit message.
##
define commitcount
$(shell \
if git log -1 --no-show-signature >/dev/null 2>/dev/null; then \
if [ -n "$(1)" ]; then \
$(call ERROR_MESSAGE,DEPRECATION NOTICE: The use of AUTORELEASE has been deprecated. Fix your Makefile.); \
last_bump="$$(git log --no-show-signature --pretty=format:'%h %s' . | \
grep -m 1 -e ': [uU]pdate to ' -e ': [bB]ump to ' | \
cut -f 1 -d ' ')"; \
fi; \
if [ -n "$$last_bump" ]; then \
echo -n $$(($$(git rev-list --count "$$last_bump..HEAD" .) + 1)); \
else \
git rev-list --count HEAD .; \
fi; \
else \
secs="$$(($(SOURCE_DATE_EPOCH) % 86400))"; \
date="$$(date --utc --date="@$(SOURCE_DATE_EPOCH)" "+%y%m%d")"; \
printf '%s.%05d' "$$date" "$$secs"; \
fi; \
)
endef
##@
# @brief Get ABI version string, stripping `-`, `_` and `.`.
#
# @param 1: Version string.
##
abi_version_str = $(subst -,,$(subst _,,$(subst .,,$(1))))
COMMITCOUNT = $(if $(DUMP),0,$(call commitcount))
AUTORELEASE = $(if $(DUMP),0,$(call commitcount,1))
all:
FORCE: ;
.PHONY: FORCE
check: FORCE
@true
val.%:
@$(if $(filter undefined,$(origin $*)),\
echo "$* undefined" >&2, \
echo '$(subst ','"'"',$($*))' \
)
var.%:
@$(if $(filter undefined,$(origin $*)),\
echo "$* undefined" >&2, \
echo "$*='"'$(subst ','"'\"'\"'"',$($*))'"'" \
)
endif #__rules_inc
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