Add docker musl-cross compile script

scripts/cross.sh

@@ -0,0 +1,141 @@
+#!/bin/bash
+#
+# This script should be run inside the tsl0922/musl-cross docker image
+#
+
+set -eo pipefail
+
+export PATH="$PATH:/opt/cross/bin"
+
+STAGE_ROOT="${STAGE_ROOT:-/opt/stage}"
+BUILD_ROOT="${BUILD_ROOT:-/opt/build}"
+
+download_sources() {
+	rm -rf sources && mkdir sources
+	pushd sources
+		curl -L -O https://zlib.net/zlib-1.2.11.tar.gz
+		curl -L -O https://s3.amazonaws.com/json-c_releases/releases/json-c-0.13.1.tar.gz
+		curl -L -O https://www.openssl.org/source/openssl-1.0.2l.tar.gz
+		curl -L -O https://github.com/warmcat/libwebsockets/archive/v2.4.2.tar.gz
+		curl -L -O https://github.com/tsl0922/ttyd/archive/1.4.0.tar.gz
+		curl -L -o queue.h "https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=misc/sys/queue.h;hb=HEAD"
+	popd
+}
+
+build_zlib() {
+	tar zxf sources/zlib-1.2.11.tar.gz -C $BUILD_DIR
+	pushd $BUILD_DIR/zlib-1.2.11
+		env CHOST=$TARGET ./configure --static --archs="-fPIC" --prefix=$STAGE_DIR
+		make install
+	popd
+}
+
+build_json-c() {
+	tar zxf sources/json-c-0.13.1.tar.gz -C $BUILD_DIR
+	pushd $BUILD_DIR/json-c-0.13.1
+		env CFLAGS=-fPIC ./configure --prefix=$STAGE_DIR --host $TARGET
+		make install
+	popd
+}
+
+build_openssl() {
+	tar zxf sources/openssl-1.0.2l.tar.gz -C $BUILD_DIR
+	pushd $BUILD_DIR/openssl-1.0.2l
+		env CC=$TARGET-gcc AR=$TARGET-ar RANLIB=$TARGET-ranlib C_INCLUDE_PATH=$STAGE_DIR/include \
+			./Configure dist -fPIC --prefix=/ --install_prefix=$STAGE_DIR
+		make && make install_sw
+	popd
+}
+
+install_sys_queue_h() {
+	cp sources/queue.h /opt/cross/$TARGET/include/sys
+}
+
+install_cmake_cross_file() {
+	cat << EOF > $BUILD_DIR/cross-$TARGET.cmake
+set(CMAKE_SYSTEM_NAME Linux)
+
+set(CMAKE_C_COMPILER "$TARGET-gcc")
+set(CMAKE_CXX_COMPILER "$TARGET-g++")
+
+set(CMAKE_FIND_ROOT_PATH "$STAGE_DIR")
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+EOF
+}
+
+build_libwebsockets() {
+	tar zxf sources/v2.4.2.tar.gz -C $BUILD_DIR
+	pushd $BUILD_DIR/libwebsockets-2.4.2
+		sed -i '13s;^;\nSET(CMAKE_FIND_LIBRARY_SUFFIXES ".a")\nSET(CMAKE_EXE_LINKER_FLAGS "-static")\n;' CMakeLists.txt
+		sed -i 's/ websockets_shared//g' cmake/LibwebsocketsConfig.cmake.in
+		mkdir build && cd build
+		cmake -DLWS_WITHOUT_TESTAPPS=ON \
+		    -DLWS_STATIC_PIC=ON \
+		    -DLWS_WITH_SHARED=OFF \
+		    -DLWS_UNIX_SOCK=ON \
+		    -DCMAKE_TOOLCHAIN_FILE=../../cross-$TARGET.cmake \
+		    -DCMAKE_INSTALL_PREFIX=$STAGE_DIR \
+		    ..
+		make install
+	popd
+}
+
+build_ttyd() {
+	tar zxf sources/1.4.0.tar.gz -C $BUILD_DIR
+	pushd $BUILD_DIR/ttyd-1.4.0
+		sed -i '5s;^;\nSET(CMAKE_FIND_LIBRARY_SUFFIXES ".a")\nSET(CMAKE_EXE_LINKER_FLAGS "-static -no-pie -s")\n;' CMakeLists.txt
+		mkdir build && cd build
+		cmake -DCMAKE_TOOLCHAIN_FILE=../../cross-$TARGET.cmake \
+		    -DCMAKE_BUILD_TYPE=RELEASE \
+		    ..
+		make
+	popd
+	cp $BUILD_DIR/ttyd-1.4.0/build/ttyd bin/ttyd.$ALIAS
+}
+
+build() {
+	TARGET="$1"
+	ALIAS="$2"
+	STAGE_DIR="$STAGE_ROOT/$TARGET"
+	BUILD_DIR="$BUILD_ROOT/$TARGET"
+
+	mkdir -p $STAGE_DIR $BUILD_DIR
+	export PKG_CONFIG_PATH="$STAGE_DIR/lib/pkgconfig"
+
+	install_cmake_cross_file
+	install_sys_queue_h
+
+	build_zlib
+	build_json-c
+	build_openssl
+	build_libwebsockets
+	build_ttyd
+}
+
+TARGETS=(
+	i686    i686-linux-musl
+	x86_64  x86_64-linux-musl
+	arm     arm-linux-musleabi
+	armhf   arm-linux-musleabihf
+	aarch64 aarch64-linux-musl
+	mips    mips-linux-musl
+	mipsel  mipsel-linux-musl
+)
+
+echo "=== Downloading sources..."
+download_sources
+
+rm -rf bin && mkdir bin
+for ((i=0; i<${#TARGETS[@]}; i+=2)); do
+	alias="${TARGETS[$i]}"
+	target="${TARGETS[$i+1]}"
+	echo "=== Building target $alias ($target)..."
+	build $target $alias
+done
+
+echo "=== Archiving bin to a tarball..."
+pushd bin
+	tar czvf ../ttyd-musl-static.tar.gz ttyd.*
+popd