staging/pepe2k/include/kernel-build.mk, branch v21.02.1

build: use SPDX license tags

2021-02-05T13:54:47Z

The license folder is a core part of OpenWrt and all GPL-2.0 licensed. Use SPDX license tags to allow machines to check licenses. Signed-off-by: Paul Spooren [rebase, keep some Copyright lines, sharpen commit message] Signed-off-by: Adrian Schmutzler

kernel-build: fix STRIP_KERNEL_EXPORTS for 64-bit kernels

2021-01-01T18:55:59Z

While parsing the nm output, we need to account for the fact that 64-bit kernels have 64-bit wide addresses. While at it, replace the grep | sed combo with a single awk invocation and a stronger regex. Fixes: 2ef0acc5fcda557fa5aaad35d27cb8cf75be96d2 "kernel-build: fix STRIP_KERNEL_EXPORTS for recent kernels" Signed-off-by: Rui Salvaterra

build: create $(PKG_SYMVERS_DIR) if non-existent

2020-11-19T17:52:15Z

Commit 5d76065 moved the creation of the symvers directory to include/kernel-build.mk. This is fine when building from scratch. But when unpacking an SDK the directory doesn't exist and because the kernel won't be built (again) this directory will not be created by the build system, causing build failure if make tries to copy files into it. This moves the creation of the symvers directory back into include/kernel.mk so that the directory is created in any case. Signed-off-by: Sebastian Kemper

build: filter out more autogenerated kernel config options

2020-11-13T12:18:20Z

Define wildcard patterns for filtering in target/linux/generic/config-filter Preparation for supporting newer kernels Signed-off-by: Felix Fietkau

build: pass KBUILD_EXTRA_SYMBOLS with symvers files for kernel module packages

2020-11-13T12:16:37Z

This replaces the previous (deprecated) method of collecting symvers data in $(PKG_BUILD_DIR)/Module.symvers, which does not work on newer kernels Signed-off-by: Felix Fietkau

build: add 'make kernel_xconfig' command

2020-07-08T14:07:05Z

This adds the kernel_xconfig make target. Signed-off-by: Sergio E. Nemirowski

build: compress kernel debuginfo using zstd

2020-05-31T09:03:31Z

zstd with its default settings (compression level -3) compresses better than bzip2 -9 (which is the default setting), and is an order of magnitude faster. I made the following measurements for the most common compression tools (all standard Debian Buster versions, default flags unless noted otherwise), using the debug information of a large x86-64 kernel with ALL_KMODS: * kernel-debug.tar: 376M * kernel-debug.tar.gz: 101M, compressed in ~12s * kernel-debug.tar.bz2: 91M, compressed in ~15s * kernel-debug.tar.xz: 57M, compressed in ~101s * kernel-debug.tar.zst: 86M, compressed in ~1s With zstd, there is still some room for improvement by increasing the compression, but the slight increase in compression ratio (22.83% -> 19.46%) does not justify the significant increase in compression time (about 5 times on my machine) in my opinion. Note that multithreaded compression (-T argument) does not affect reproducibility with zstd. Signed-off-by: Matthias Schiffer

build: fix kernel_menuconfig on macOS with newer kernel versions

2020-04-09T07:54:02Z

Account for upstream build system changes Signed-off-by: Felix Fietkau

kernel-build: ignore runtime config options during reconfig

2019-11-24T13:19:43Z

Don't put CC_HAS_ASM_GOTO, IS_GCC, IS_CLANG and GCC_VERSION runtime config options into the kernel configs during reconfiguration as it makes no sense, since these options should be set at runtime. Fixes: FS#2588 Signed-off-by: Petr Štetiar

kernel-build: fix kernel_menuconfig breakage by forcing YACC

2019-11-14T21:53:31Z

Commit 965f341aa9fd ("build: fix host menu config targets using ncurses") has moved host's path with pkg-config (usually /usr/bin) at the first place in PATH variable, which is now causing issues with bison as BISON_PKGDATADIR points into STAGING_DIR_HOST, but the actual bison used is the one under host PATH (usually /usr/bin/bison), leading to the following strange failures: $ make target/linux/clean kernel_menuconfig V=sc export MAKEFLAGS= ;make -C /somewhere/linux-4.19.81 menuconfig make -f ./scripts/Makefile.build obj=scripts/kconfig menuconfig ... bison -oscripts/kconfig/zconf.tab.c -t -l scripts/kconfig/zconf.y staging_dir/host/bin/m4: cannot open `staging_dir/host/share/bison/bison.m4': No such file or directory staging_dir/host/bin/m4: cannot open `staging_dir/host/share/bison/c-skel.m4': No such file or directory ... gcc -Wp,-MD,scripts/kconfig/.zconf.tab.o.d <...snip...> -o scripts/kconfig/zconf.tab.o scripts/kconfig/zconf.tab.c gcc: error: scripts/kconfig/zconf.tab.c: No such file or directory gcc: fatal error: no input files Fix this by forcing usage of bison under STAGING_DIR_HOST/bin via YACC make variable. Cc: Thomas Albers Cc: Stijn Tintel Cc: Eneas U de Queiroz Tested-by: Ivan Revyakin Tested-by: Thomas Albers Ref: https://forum.openwrt.org/t/bpi-r64-kernel-4-19-kernel-menuconfig-error Fixes: 965f341aa9fd ("build: fix host menu config targets using ncurses") Signed-off-by: Petr Štetiar