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* build: improve ccache supportRoman Yeryomin2020-07-119-10/+29
| | | | | | | | | | | | | | | | | | Set CCACHE_DIR to $(TOPDIR)/.ccache and CCACHE_BASEDIR to $(TOPDIR). This allows to do clean and dirclean. Cache hit rate for test build after dirclean is ~65%. If CCACHE is enabled stats are printed out at the end of building process. CCACHE_DIR config variable allows to override default, which could be useful when sharing cache with many builds. cacheclean make target allows to clean the cache. Changes from v1: - remove ccache directory using CCACHE_DIR variable - remove ccache leftovers from sdk and toolchain make files - introduce CONFIG_CCACHE_DIR variable - introduce cacheclean make target Signed-off-by: Roman Yeryomin <roman@advem.lv>
* ramips: mt7621: refactor set affinity scriptDENG Qingfang2020-07-111-19/+7
| | | | | | | | The current one only looks for mt76x2e and mt7603e, and does not work for 2 or more same Wi-Fi chips. Refactor the script to cover those cases. Signed-off-by: DENG Qingfang <dengqf6@mail2.sysu.edu.cn>
* ltq-vmmc: update permission handlingSebastian Kemper2020-07-112-13/+7
| | | | | | | | | | | | | | The firmware is currently just copied. It can end up with o= on the device (this is the case for voice_ar9_firmware.bin for instance). Instead of copying it the Makefile is changed to use the macro "$(INSTALL_DATA)" in order for the file to be world-readable. While at it refactor the device node creation in the init script with loop. Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net> [removed 2nd part with custom group handling for device nodes] Signed-off-by: Petr Štetiar <ynezz@true.cz>
* layerscape: define IMAGE_SIZE and LS_SYSUPGRADE_IMAGE_SIZEYangbo Lu2020-07-113-10/+18
| | | | | | | | | Define 64m IMAGE_SIZE for flash firmware.bin since the flash size is 64MB. Define 48m LS_SYSUPGRADE_IMAGE_SIZE for flash sysupgrade.bin which contains maximum 16MB kernel and 32MB rootfs according to memory map. Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
* layerscape: support sysupgrade for SD card ext4 rootfsYangbo Lu2020-07-114-6/+141
| | | | | | Support sysupgrade for SD card ext4 rootfs. Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
* layerscape: support sysupgrade for squashfs rootfsYangbo Lu2020-07-119-13/+35
| | | | | | | Support sysupgrade for all Layerscape boards with squashfs rootfs. Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
* layerscape: fix board name for SD card bootYangbo Lu2020-07-111-0/+13
| | | | | | | | | Many Layerscape boards support both flash boot and SD card boot. And different firmware and sysupgrade.bin are built for the two boot methods. To identify them, a fix could be done on board name by adding a postfix "-sdboot" for SD card boot. Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
* layerscape: add compatible for board ls1043ardbYangbo Lu2020-07-111-0/+28
| | | | | | Backport a dts patch which added compatible for ls1043ardb. Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
* layerscape: convert to squashfs rootfs for QSPI NOR bootYangbo Lu2020-07-114-20/+8
| | | | | | | | | | | There had been an issue in Layerscape QSPI driver for very long time, which made squashfs,jffs2 rootfs not work on QSPI NOR. And the ubifs had been used as a workaround. Now the issue has been fixed. So convert to use squashfs,jffs2 rootfs on QSPI NOR for Layerscape boards (LS1012ARDB/LS1046ARDB/ LS1088ARDB), and update u-boot bootargs for booting. Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
* busybox: store applet usage messages uncompressedRui Salvaterra2020-07-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The rootfs squashfs is already highly (XZ) compressed. Storing the applet messages in compressed form will increase the entropy and reduce the overall image compression ratio. Size diffs (compressed vs uncompressed): busybox (the executable): 364596 vs 384804 bytes. OpenWrt target images (the kernel image is unchanged, obviously): omnia-medkit-openwrt-mvebu-cortexa9-cznic_turris-omnia-initramfs.tar.gz: 9163597 vs 9162531 bytes (1066 bytes difference). openwrt-mvebu-cortexa9-cznic_turris-omnia-initramfs-kernel.bin: 9161688 vs 9160600 bytes (1088 bytes difference). openwrt-mvebu-cortexa9-cznic_turris-omnia-sysupgrade.img.gz: 9729550 vs 9729230 bytes (320 bytes difference). All in all, we save just a little bit over 1 kiB. As an added bonus, we also don't have to decompress the messages twice, (first from squashfs, then from the bzip2 message storage). Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com> [added additional size comparision diff detaisl] Signed-off-by: Petr Štetiar <ynezz@true.cz>
* base-files/functions.sh: use command -v instead of whichRosen Penev2020-07-111-2/+2
| | | | | | | | which must be executed. command -v is a shell builtin. https://github.com/koalaman/shellcheck/wiki/SC2230 Signed-off-by: Rosen Penev <rosenp@gmail.com>
* scripts/mkits.sh: fix remaining shellcheck warningPetr Štetiar2020-07-111-1/+1
| | | | | | | | | | Fixes following shellcheck warning: In scripts/mkits.sh line 19: "-k kernel [-D name -d dtb] -o its_file" "$(basename $0)" ^-- SC2086: Double quote to prevent globbing and word splitting. Signed-off-by: Petr Štetiar <ynezz@true.cz>
* scripts/mkits.sh: switch from bash to shRosen Penev2020-07-111-1/+1
| | | | | | This no longer needs bash. Signed-off-by: Rosen Penev <rosenp@gmail.com>
* scripts/mkits.sh: fix improper string and array concatenationRosen Penev2020-07-111-1/+1
| | | | | | Found with shellcheck. Signed-off-by: Rosen Penev <rosenp@gmail.com>
* scripts/mkits.sh: add missing quotesRosen Penev2020-07-111-2/+2
| | | | | | Found with shellcheck. Signed-off-by: Rosen Penev <rosenp@gmail.com>
* scripts/mkits.sh: replace echo -e with printfRosen Penev2020-07-111-12/+12
| | | | | | echo flags are not POSIX. printf does the same with added \n. Signed-off-by: Rosen Penev <rosenp@gmail.com>
* scripts/gen_image_generic.sh: fix more shellcheck warningsPetr Štetiar2020-07-111-4/+3
| | | | | | | | | | | | | | | | | | Fixes following shellcheck warnings: In scripts/gen_image_generic.sh line 20: cyl=$(( (KERNELSIZE + ROOTFSSIZE) * 1024 * 1024 / (head * sect * 512))) ^-^ SC2034: cyl appears unused. Verify use (or export if used externally). -- In scripts/gen_image_generic.sh line 34: [ -n "$PADDING" ] && dd if=/dev/zero of="$OUTPUT" bs=512 seek="$(($ROOTFSOFFSET + $ROOTFSSIZE))" conv=notrunc count="$sect" ^-----------^ SC2004: $/${} is unnecessary on arithmetic variables. -- In scripts/gen_image_generic.sh line 35: mkfs.fat -n kernel -C "$OUTPUT.kernel" -S 512 "$(($KERNELSIZE / 1024))" ^---------^ SC2004: $/${} is unnecessary on arithmetic variables. Signed-off-by: Petr Štetiar <ynezz@true.cz>
* scripts/gen_image_generic.sh: use /bin/shRosen Penev2020-07-111-1/+1
| | | | | | This has nothing bash specific. Signed-off-by: Rosen Penev <rosenp@gmail.com>
* scripts/gen_image_generic.sh: replace -o with if/&&Rosen Penev2020-07-111-2/+2
| | | | | | | | -o is not well defined. Found with shellcheck. Signed-off-by: Rosen Penev <rosenp@gmail.com>
* scripts/env: fix remaining shellcheck warningPetr Štetiar2020-07-111-1/+1
| | | | | | | | | | Fixes following shellcheck warning: In scripts/env line 25: exit ${1:-1} ^-----^ SC2086: Double quote to prevent globbing and word splitting. Signed-off-by: Petr Štetiar <ynezz@true.cz>
* scripts/env: use read -r instead of readRosen Penev2020-07-111-1/+1
| | | | | | | | read mangles backslashes. Found with shellcheck. Signed-off-by: Rosen Penev <rosenp@gmail.com>
* scripts/env: exit in case of failure to cdRosen Penev2020-07-111-1/+1
| | | | | | Found with shellcheck. Signed-off-by: Rosen Penev <rosenp@gmail.com>
* scripts/env: replace \! with !Rosen Penev2020-07-111-2/+2
| | | | | | | The latter is more standard. The former throws an error under shellcheck. Signed-off-by: Rosen Penev <rosenp@gmail.com>
* scripts/env: use command -v instead of whichRosen Penev2020-07-111-1/+1
| | | | | | | | Simpler and built in to the shell. Found with shellcheck. Signed-off-by: Rosen Penev <rosenp@gmail.com>
* build: reduce number of files passed to ipk-removeEneas U de Queiroz2020-07-111-11/+8
| | | | | | | | | | | | | | | | | | | | Instead of using xargs to pass a huge number of files to script/ipkg-remove, which will usually pick only one, use a more restrictive wildcard so that, currently, at the most 325 files are examined, instead of up to over 2,300. The 325-file package is python, which is picking up python3* ipks. It is about to be removed. Runner-up is ddns-scripts with 7 files. This makes a second run of make package/luci/compile go from real 16.40s; user 17.42s; sys 2.73s to real 10.71s; user 9.51s; sys 1.27s There is a caveat though: if one were to remove the ABI_VERSION of a package that ends in a digit [0-9], then the old package ipk will not be removed from the bin directory by make package/abc2/clean. Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
* build: call ipkg-remove using xargs if #args>=512Eneas U de Queiroz2020-07-111-1/+11
| | | | | | | | | | | | | The wildcard call to clean up luci package (luci*) can pick up over 2,300 files when the full tree is built. Running make package/luci/clean or a second run of make package/luci/compile would fail with an 'Argument list too long' error. To avoid that, a maybe_use_xargs function was created that runs the command straight as usual if the number of arguments is < 512, or saves the list in a temporary file and feeds it to xargs otherwise. Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
* build: package-ipkg: avoid calling wildcard twiceEneas U de Queiroz2020-07-111-2/+8
| | | | | | | | Instead of calling $(wildcard) to check if the removal list is empty, then calling it again to actually remove the files, define a function so that the arguments are expanded only once when it gets called. Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
* toolchain/wrapper.sh: fix remaining shellcheck warningsPetr Štetiar2020-07-111-8/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes following warnings: In target/toolchain/files/wrapper.sh line 18: REALNAME=$(readlink -f $0) ^-- SC2086: Double quote to prevent globbing and word splitting. -- In target/toolchain/files/wrapper.sh line 20: REALNAME_BASE=$(basename $REALNAME) ^-------^ SC2086: Double quote to prevent globbing and word splitting. -- In target/toolchain/files/wrapper.sh line 21: REALNAME_DIR=$(dirname $REALNAME) ^-------^ SC2086: Double quote to prevent globbing and word splitting. -- In target/toolchain/files/wrapper.sh line 74: exec $TARGET_TOOLCHAIN_TRIPLET-$BINARY.bin $GCC_SYSROOT_FLAGS $TARGET_FUNDAMENTAL_CFLAGS $TARGET_ROOTFS_CFLAGS "$@" ^-----------------------^ SC2086: Double quote to prevent globbing and word splitting. -- In target/toolchain/files/wrapper.sh line 77: exec $TARGET_TOOLCHAIN_TRIPLET-$BINARY.bin $LD_SYSROOT_FLAGS $TARGET_FUNDAMENTAL_LDFLAGS "$@" ^-----------------------^ SC2086: Double quote to prevent globbing and word splitting. -- In target/toolchain/files/wrapper.sh line 80: exec $TARGET_TOOLCHAIN_TRIPLET-$BINARY.bin $TARGET_FUNDAMENTAL_ASFLAGS "$@" ^-----------------------^ SC2086: Double quote to prevent globbing and word splitting. -- In target/toolchain/files/wrapper.sh line 83: exec $TARGET_TOOLCHAIN_TRIPLET-$BINARY.bin "$@" ^-----------------------^ SC2086: Double quote to prevent globbing and word splitting. Signed-off-by: Petr Štetiar <ynezz@true.cz>
* toolchain/wrapper.sh: Replace read with read -rRosen Penev2020-07-111-1/+1
| | | | | | | | Without -r, backslashes would get mangled. Found with shellcheck. Signed-off-by: Rosen Penev <rosenp@gmail.com>
* toolchain/gdb: Don't use gdb-arcRosen Penev2020-07-111-11/+0
| | | | | | GDB got support for ARC with version 8.2. No need for this fork. Signed-off-by: Rosen Penev <rosenp@gmail.com>
* kernel: kmod-zram: break the strict dependency from lz4Rui Salvaterra2020-07-112-4/+2
| | | | | | | | Zram is only strictly dependent on lzo, not lz4. Break this dependency and make the lz4 module visible in the configuration, in order for the user to have the choice of enabling/disabling it, if (s)he sees fit. Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
* zram-swap: correctly express the required dependenciesRui Salvaterra2020-07-111-1/+1
| | | | | | | | The block-mount swapon implementation doesn't support discard, so make zram-swap depend only on the default BusyBox implementation or, when unavailable, on the one present in the swap-utils package. Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
* zram-swap: enable swap discardRui Salvaterra2020-07-111-1/+1
| | | | | | | | | | | Zram block devices have supported trim/discard for over six years, let's enable it. This allows the zram device to actually free up allocated memory when it's marked as unused in the filesystem metadata, as explained in more detail in the original commit message [1]. [1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/block/zram/zram_drv.c?h=linux-4.14.y&id=f4659d8e620d08bd1a84a8aec5d2f5294a242764 Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
* busybox: use CLOCK_MONOTONIC instead of gettimeofdayRui Salvaterra2020-07-111-1/+1
| | | | | | | | | | | The clock_gettime(CLOCK_MONOTONIC) syscall exists for so long that the first kernel version to support it is not even specified in the man page [1]. Let's enable it on BusyBox by default. Otherwise, gettimeofday will be used instead, which will give wrong results if the date/time is reset (time moving backwards). [1] https://linux.die.net/man/2/clock_gettime Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
* lzo: switch to building with CMakeRosen Penev2020-07-111-11/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | CMake is less error prone that autotools and also compiles faster. Fixed license information. Added pkgconfig file to InstallDev so that packages that use it can find lzo. Before: time make package/lzo/compile -j 12 ________________________________________________________ Executed in 20.87 secs fish external usr time 26.95 secs 0.00 micros 26.95 secs sys time 5.49 secs 305.00 micros 5.49 secs After: time make package/lzo/compile -j 12 ________________________________________________________ Executed in 13.22 secs fish external usr time 19.59 secs 328.00 micros 19.59 secs sys time 4.03 secs 10.00 micros 4.03 secs Time output is with fish shell. make clean was ran before both attempts. Signed-off-by: Rosen Penev <rosenp@gmail.com>
* libubox: update to version 2020-07-11Petr Štetiar2020-07-111-3/+3
| | | | | | | | | f4e9bf73ac5c examples/lua: attempt to highlight some traps 53b9a2123fc6 lua/uloop: fd_add: use absolute indices for arguments c0941d3289fc lua/uloop: make get_sock_fd capable of absolute addresses 161c25960ba2 lua/uloop: fd_add() better args checking Signed-off-by: Petr Štetiar <ynezz@true.cz>
* ramips: kernel: fix awake-rt305x-dwc2 patchAlexey Dobrovolsky2020-07-111-7/+7
| | | | | | | | | | | | | At this point in v5.4 kernel we cannot use dwc2_readl() and dwc2_writel() since they rely on the value hsotg->needs_byte_swap which cannot be obtained before the controller wakes up. We should use readl() and writel() to wake up the controller before calling dwc2_check_core_endianness(). Fixes: 6be0da90a165 ("ramips: refresh patches") Signed-off-by: Alexey Dobrovolsky <dobrovolskiy.alexey@gmail.com> [fixed Fixes: tag] Signed-off-by: Petr Štetiar <ynezz@true.cz>
* linux-firmware: package EIP197 mini firmwareTomasz Maciej Nowak2020-07-112-4/+15
| | | | | | | | | | | | | Quoting part of original message from eefb5f741015 commit in linux-firmware repository: This adds the "minifw" version of the EIP197 firmware, which the inside- secure driver will use as a fallback if the original full-featured firmware cannot be found. This allows for using the inside-secure driver and hardware without access to "official" firmware only available under NDA. Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>
* firmware-utils: mkfwimage: fix memcpy and strncpy usagePetr Štetiar2020-07-113-16/+28
| | | | | | | | | | | | | | Firmware is binary blob, so there are barely any NULL terminated strings expected, so we should probably convert all chars into u8 types, and after that it's clear, that using strcpy doesn't make sense anymore. This is rather theoretical stuff, but `uint8_t name[PART_NAME_LENGTH]` means, that you can supply PART_NAME_LENGTH sized name, not PART_NAME_LENGTH-1 name when NULL terminated. Ref: https://github.com/openwrt/openwrt/pull/2274 Fixes: 04cb651376f9 ("firmware-utils: mkfwimage: fix more errors reported by gcc-6/7/9") Signed-off-by: Petr Štetiar <ynezz@true.cz>
* toolchain/gcc: Add GCC 10.1.0 patchesSyrone Wong2020-07-1113-34/+34
| | | | | | | | | | | | | | | Compared to GCC 9: 870-ppc_no_crtsavres.patch changes moved to another file following upstream 881-no_tm_section.patch keep the tm section disabled patches refreshed to apply cleanly See https://gcc.gnu.org/gcc-10/porting_to.html for more info Compiled and run tested on x86_64 Signed-off-by: Syrone Wong <wong.syrone@gmail.com>
* toolchain/gcc: Add GCC 10.1.0 configSyrone Wong2020-07-113-0/+12
| | | | | | | | Add needed config changes and tarball hash for new GCC version. Signed-off-by: Syrone Wong <wong.syrone@gmail.com> [added missing commit description] Signed-off-by: Petr Štetiar <ynezz@true.cz>
* toolchain/gcc: Copy patches from 9.3.0 to 10.1.0Syrone Wong2020-07-1118-0/+839
| | | | | | No content changes in this commit Signed-off-by: Syrone Wong <wong.syrone@gmail.com>
* kirkwood: add support for Check Point L-50Pawel Dembicki2020-07-118-0/+590
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds support for the Check Point L-50 from 600/1100 series routers. Specification: -CPU: Marvell Kirkwood 88F6281 1200MHz -RAM: 512MB -Flash: NAND 512MB -WiFi: mPCIe card based on Atheros AR9287 b/g/n -WAN: 1 Gigabit Port (Marvell 88E1116R PHY) -LAN: 9 Gigabit Ports (2x Marvell 88E6171(5+4)) -USB: 2x USB2.0 -Express card slot -SD card slot -Serial console: RJ-45 115200 8n1 -Unsupported DSL Known issues: -DSL not supported -Expresscard not tested Installation: Step one -> backup: make backup u-boot and env for revert stock posibility make backup dsl_mac_addr, dmz_mac_addr, eth1addr, ethaddr and all lanX_mac_addr Step two -> Use kwboot tool to upload openwrt u-boot to RAM: run kwboot: "kwboot -B 115200 /dev/ttyUSB0 -b u-boot.kwb -p -t" end start u-boot Step three -> Restore macs (e.g. below): setenv eth1addr 00:1C:XX:XX:XX:6C setenv ethaddr 00:1C:XX:XX:XX:6B setenv lan1_mac_addr 00:1C:XX:XX:XX:6C setenv lan2_mac_addr 00:1C:XX:XX:XX:6D setenv lan3_mac_addr 00:1C:XX:XX:XX:6E setenv lan4_mac_addr 00:1C:XX:XX:XX:6F setenv lan5_mac_addr 00:1C:XX:XX:XX:70 setenv lan6_mac_addr 00:1C:XX:XX:XX:71 setenv lan7_mac_addr 00:1C:XX:XX:XX:72 setenv lan8_mac_addr 00:1C:XX:XX:XX:73 setenv dmz_mac_addr 00:1C:XX:XX:XX:74 setenv dsl_mac_addr 00:1C:XX:XX:XX:75 Step four -> flash u-boot: mw 0x0800000 0xffff 0x100000 nand erase 0x0 100000 tftp 0x0800000 openwrt-kirkwood-l50-u-boot.kwb nand write 0x0800000 0x0 0x100000 saveenv Step five -> run initramfs image: tftpboot 0x02000000 openwrt.bin; bootm 0x02000000; Step six -> install sysupgrade OpenWrt image: copy to /tmp/ sysupgrade image run sysupgrade Back to stock: Restore original u-boot end env. Install factory image via stock u-boot. Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
* uboot-kirkwood: add uboot for CheckPoint L-50Pawel Dembicki2020-07-115-2/+1078
| | | | | | This patch add u-boot for CheckPoint L-50 routers. Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
* kernel: add package for Seiko S-35390A I2C RTCPawel Dembicki2020-07-111-0/+17
| | | | | | This patch adds kernel package for Seiko Instruments S-35390A. Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
* uboot-envtools: ath79: update ubootenv partion index for gl-ar300mHuangbin Zhan2020-07-111-4/+8
| | | | | | | The block index of u-boot-env changed from mtd1 to mtd3 after upgrading kernel to 5.4. This patch search the mtd block by label name, work as expect when perform a clean flash. Signed-off-by: Huangbin Zhan <zhanhb88@gmail.com>
* kernel: bump 5.4 to 5.4.51John Audia2020-07-115-69/+8
| | | | | | | | | | | | | | | | | | | | | update via update_kernel.sh -v -u 5.4 Removed upstreamed patches: 350-MIPS-Add-missing-EHB-in-mtc0-mfc0-sequence-for-DSPen.patch Script refreshed patches: 902-debloat_proc.patch 904-debloat_dma_buf.patch Attempted merge conflict in following patches: 0024-MIPS-lantiq-revert-DSA-switch-driver-PMU-clock-chang.patch Build system: x86_64 Build tested: ipq806x (Netgear R7800) Signed-off-by: John Audia <graysky@archlinux.us> [fixed sha256sum of the tarball] Signed-off-by: Petr Štetiar <ynezz@true.cz>
* ipq806x: enable Linksys EA8500 eth1 interfacePawel Dembicki2020-07-113-1/+3
| | | | | | | | | | | | | At this moment Linksys EA8500 uses only eth0. This patch change switch registers, which allow to use eth1 as lan and eth0 as wan. The method work with similar Linksys EA7500V1 and it work with EA8500. Suggested-by: Sungbo Eo <mans0n@gorani.run> Tested-by: Brian Onn <brian.a.onn@gmail.com> Tested-by: Adrian Panella <ianchi74@outlook.com> Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
* base-files: remove useless catAdrian Schmutzler2020-07-111-1/+1
| | | | | | Check file contents directly instead of using cat. Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
* wireguard-tools: replace backticks by $(...)Adrian Schmutzler2020-07-111-4/+4
| | | | | | This replaces deprecated backticks by more versatile $(...) syntax. Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>