lightning

#!/bin/bash
export PATH=$PATH:/home/adam/data/openwrt/staging_dir/toolchain-arm_cortex-a9+vfpv3_gcc-8.3.0_musl_eabi/bin
export STAGING_DIR=/home/adam/data/openwrt/staging_dir/toolchain-arm_cortex-a9+vfpv3_gcc-8.3.0_musl_eabi
export target_host=arm-openwrt-linux-muslgnueabi
export AR=$target_host-ar
export AS=$target_host-as
export CC=$target_host-gcc
export CXX=$target_host-g++
export LD=$target_host-ld
export STRIP=$target_host-strip
export QEMU_LD_PREFIX=/home/adam/data/openwrt/staging_dir/target-arm_cortex-a9+vfpv3_musl_eabi/root-mvebu

edit Makefile to change /usr/local to /home/adam/data/openwrt/staging_dir/target-arm_cortex-a9+vfpv3_musl_eabi/usr
edit external/libwally/config.status and external/libsodium/Makefile to set HAVE_EXPLICIT_BZERO=0
edit configure script to add -lz after libsqlite3:
link=-lsqlite3 -lz


./configure --enable-static --prefix=$QEMU_LD_PREFIX
BUILD=x86_64 MAKE_HOST=arm-linux-gnueabihf HOST=arm-linux-gnueabihf make

bitcoin

change __NFDBITS to NFDBITS in src/compat/glibc_compat.cpp
(not necessary in bitcoin 19)

export QEMU_LD_PREFIX=/home/adam/data/openwrt/staging_dir/target-arm_cortex-a9+vfpv3_musl_eabi
./configure --prefix=$QEMU_LD_PREFIX --host=$target_host --disable-wallet --enable-reduce-exports
BUILD=x86_64 MAKE_HOST=arm-linux-gnueabihf HOST=arm-linux-gnueabihf make