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037b690bce
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159
Dockerfile
159
Dockerfile
@ -1,159 +0,0 @@
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# syntax=docker/dockerfile:1
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########################
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# Stage 1: build deps #
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########################
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FROM alpine:latest AS builder
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ARG B_TARGET_ARCH
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ARG B_TARGET_TRIPLE
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ARG B_CC
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ARG B_CXX
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ENV TARGET_ARCH=$B_TARGET_ARCH
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ENV TARGET_TRIPLE=$B_TARGET_TRIPLE
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ENV CC=$B_CC
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ENV CXX=$B_CXX
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# Enable static builds with musl
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ENV CFLAGS="-static -O2" \
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CXXFLAGS="-static -O2" \
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LDFLAGS="-static"
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# Install build dependencies
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RUN apk update && \
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apk add --no-cache \
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build-base \
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make \
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cmake \
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ninja \
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git \
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openssl-dev \
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zlib-static \
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bash \
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wget \
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curl \
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linux-headers \
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ccache \
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mold \
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musl-dev \
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gcc-cross-embedded \
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g++-cross-embedded \
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gcc \
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g++
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RUN apk add --no-cache \
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zlib-dev \
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python3 \
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bison \
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flex \
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texinfo \
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gperf \
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help2man \
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gettext-dev \
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autoconf \
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automake \
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libtool \
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patch \
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gawk \
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xz-dev
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# Configure mold as the default linker
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ENV LD=mold
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########################################
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# nlohmann/json (compiled static .a) #
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########################################
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RUN git clone --depth 1 https://github.com/nlohmann/json.git /tmp/json
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RUN cmake -S /tmp/json -B /tmp/json/build \
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-DJSON_BuildTests=OFF \
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-DJSON_MultipleHeaders=OFF \
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-DBUILD_SHARED_LIBS=OFF && \
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cmake --build /tmp/json/build --config Release && \
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cmake --install /tmp/json/build
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#############################
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# cpp‑httplib (header‑only) #
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#############################
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RUN wget -q https://raw.githubusercontent.com/yhirose/cpp-httplib/master/httplib.h \
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-O /usr/local/include/httplib.h
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##################################
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# libassert (build static .a) #
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##################################
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ARG LIBASSERT_VERSION=v2.1.5
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RUN git clone --depth 1 --branch ${LIBASSERT_VERSION} https://github.com/jeremy-rifkin/libassert.git /tmp/libassert && \
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cmake -S /tmp/libassert -B /tmp/libassert/build \
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-DLIBASSERT_BUILD_TESTS=OFF \
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-DLIBASSERT_BUILD_EXAMPLES=OFF \
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-DLIBASSERT_BUILD_STATIC=ON && \
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cmake --build /tmp/libassert/build --config Release && \
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cmake --install /tmp/libassert/build
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#####################
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# zlib (static .a) #
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#####################
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ARG ZLIB_VERSION=1.3.1
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RUN wget -q https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz && \
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tar xzf zlib-${ZLIB_VERSION}.tar.gz && \
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cd zlib-${ZLIB_VERSION} && \
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./configure --static && \
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make -j$(nproc) && \
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make install && \
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cd .. && rm -rf zlib-${ZLIB_VERSION}*
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##############################
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# Reduce size of .a archives #
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##############################
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RUN strip --strip-unneeded /usr/local/lib/*.a
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############################
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# Stage 2: final build kit #
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############################
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FROM alpine:3.19
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ARG B_TARGET_ARCH
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ARG B_TARGET_TRIPLE
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ARG B_CC
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ARG B_CXX
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ENV TARGET_ARCH=$B_TARGET_ARCH
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ENV TARGET_TRIPLE=$B_TARGET_TRIPLE
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ENV CC=$B_CC
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ENV CXX=$B_CXX
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# Install core toolchain for building apps
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RUN apk update && \
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apk add --no-cache \
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build-base \
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make \
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cmake \
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ninja \
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git \
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openssl-dev \
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zlib-static \
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bash \
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wget \
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curl \
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linux-headers \
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ccache \
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mold \
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musl-dev \
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gcc-cross-embedded \
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g++-cross-embedded \
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gcc \
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g++
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# Configure mold as the default linker
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ENV LD=mold
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# Copy pre‑built static libs + headers
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COPY --from=builder /usr/local /usr/local
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ENV CFLAGS="-static" \
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CXXFLAGS="-static" \
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LDFLAGS="-static"
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WORKDIR /workspace
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ENTRYPOINT ["/bin/bash"]
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27
build.sh
27
build.sh
@ -1,27 +0,0 @@
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#!/bin/bash
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set -e
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docker build \
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--build-arg B_TARGET_ARCH=arm64 \
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--build-arg B_TARGET_TRIPLE=aarch64-linux-musl \
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--build-arg B_CC=aarch64-linux-musl-gcc \
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--build-arg B_CXX=aarch64-linux-musl-g++ \
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-t cpp-httplib-builder:arm64 \
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.
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docker build \
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--build-arg B_TARGET_ARCH=amd64 \
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--build-arg B_TARGET_TRIPLE=x86_64-linux-musl \
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--build-arg B_CC=x86_64-alpine-linux-musl-gcc \
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--build-arg B_CXX=x86_64-alpine-linux-musl-g++ \
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-t cpp-httplib-builder:amd64 \
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.
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docker tag cpp-httplib-builder:arm64 gitea.jde.nz/public/cpp-httplib-builder:arm64
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docker tag cpp-httplib-builder:amd64 gitea.jde.nz/public/cpp-httplib-builder:amd64
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docker tag cpp-httplib-builder:amd64 gitea.jde.nz/public/cpp-httplib-builder:latest
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docker push gitea.jde.nz/public/cpp-httplib-builder:arm64
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docker push gitea.jde.nz/public/cpp-httplib-builder:amd64
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docker push gitea.jde.nz/public/cpp-httplib-builder:latest
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22
install_toolchain.sh
Executable file
22
install_toolchain.sh
Executable file
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#!/bin/bash
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targets=(
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"linux-x86_64-full"
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"linux-arm64-full"
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)
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for target in ${targets[@]}; do
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docker pull dockcross/${target}
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done
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BIN_DIR=${HOME}/.local/bin
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mkdir -p ${BIN_DIR}
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for target in ${targets[@]}; do
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docker run dockcross/$target > ${BIN_DIR}/dockcross-$target && chmod u+x ${BIN_DIR}/dockcross-$target
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echo "Installed ${BIN_DIR}/dockcross-$target"
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done
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@ -0,0 +1,7 @@
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This dockerfile is designed to allow c++ programs to be statically built using dockcross,
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natively for x86_64 and cross-compiling for arm64 linux architectures (for raspberry pi's and quest 3 headsets), and link statically to these libraries built in the docker container:
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- nlohmann/json https://github.com/nlohmann/json
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- libassert from https://github.com/jeremy-rifkin/libassert
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plus has the header for httplib ( https://github.com/yhirose/cpp-httplib ) in /usr/local/include.
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@ -2,6 +2,8 @@
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set -e
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SCRIPT_DIR=$(dirname $(realpath $0))
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PROJECT=ipdemo
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function title() {
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@ -25,39 +27,33 @@ function build() {
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docker volume create cppbuild-cache-$ARCH
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# Directory to copy the executable to
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OUTDIR="output"
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OUTDIR="$SCRIPT_DIR/output"
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WORKDIR="$SCRIPT_DIR/build/${ARCH}"
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mkdir -p "$OUTDIR"
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mkdir -p "$WORKDIR"
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mkdir -p "$WORKDIR/.ccache"
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echo "WORKDIR: $WORKDIR"
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echo "OUTDIR: $OUTDIR"
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echo "SCRIPT_DIR: $SCRIPT_DIR"
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BUILD_IMAGE="gitea.jde.nz/public/cpp-httplib-builder:$ARCH"
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# Build command to run in the container
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BUILD_COMMAND="mkdir -p /app/build && \
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cd /app/build && \
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cmake -G Ninja /app/src && \
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ninja -j$(nproc) && \
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mkdir -p /app/src/$OUTDIR && \
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cp /app/build/$PROJECT /app/src/$OUTDIR/$PROJECT.$ARCH && \
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chown -R $(id -u):$(id -g) /app/src/$OUTDIR"
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case $ARCH in
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"arm64") export TARGET_TRIPLE="aarch64-linux-musl";;
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"amd64") export TARGET_TRIPLE="x86_64-linux-musl";;
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"arm64") export DOCKCROSS="dockcross-linux-arm64-full";;
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"amd64") export DOCKCROSS="dockcross-linux-x86_64-full";;
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*) echo "Unsupported architecture $ARCH"; exit 1;;
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esac
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export CC="ccache ${TARGET_TRIPLE}-gcc"
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export CXX="ccache ${TARGET_TRIPLE}-g++"
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# Run the build in the container
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docker run --rm \
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-v cppbuild-cache:/app/build \
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-v $(pwd):/app/src \
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-w /app/src \
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-e CCACHE_DIR=/app/build/.ccache \
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-e LD=mold \
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-e CMAKE_BUILD_PARALLEL_LEVEL=$(nproc) \
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-e NINJA_STATUS="[%f/%t] " \
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$BUILD_IMAGE \
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-c "$BUILD_COMMAND"
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export CC="ccache gcc"
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export CXX="ccache g++"
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export LD="mold"
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export CCACHE_DIR=${WORKDIR}/.ccache
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cd $SCRIPT_DIR
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$DOCKCROSS bash -c "cmake -B$WORKDIR . -GNinja"
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$DOCKCROSS bash -c "ninja -j$(nproc) -Cbuild/${ARCH}"
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cp "${WORKDIR}/$PROJECT" "${OUTDIR}/$PROJECT.$ARCH"
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# Run the executable if it exists
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if [ ! -f $OUTDIR/$PROJECT.$ARCH ]; then
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@ -1,21 +0,0 @@
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set(CMAKE_SYSTEM_NAME Linux)
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set(CMAKE_SYSTEM_PROCESSOR aarch64)
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# Specify the cross compilers
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set(CMAKE_C_COMPILER /opt/cross/bin/aarch64-unknown-linux-musl-gcc)
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set(CMAKE_CXX_COMPILER /opt/cross/bin/aarch64-unknown-linux-musl-g++)
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# Where is the target environment
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set(CMAKE_FIND_ROOT_PATH /opt/cross/aarch64-unknown-linux-musl)
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# Search for programs in the build host directories
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set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
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# Search for libraries and headers in the target directories
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set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
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set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
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set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
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# Set compiler flags
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=armv8-a")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=armv8-a")
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@ -1,3 +0,0 @@
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#docker run --entrypoint "/bin/sh" -it --rm cpp-httplib-builder:latest -c "/bin/sh"
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docker run -it --rm cpp-httplib-builder:latest -c "/bin/bash"
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