# Cross-compile for a specific target triplet (x86_64 by default)
ARG TARGET
ARG CORES=4
FROM rustembedded/cross:${TARGET}-musl

# Create download directory
RUN mkdir /src

### Environment
# Configure compiler
ENV MAKE="make -j$CORES" \
    CC="musl-gcc -fPIE -pie -static" \
    PREFIX=/usr/local/x86_64-linux-musl \
    RUSTFLAGS="-C relocation-model=static"
# Configure paths
ENV PATH=$PREFIX/bin:$PATH \
    C_INCLUDE_PATH=$PREFIX/include \
    LD_LIBRARY_PATH=$PREFIX/lib
# Configure pkg-config
ENV PKG_CONFIG_PATH=$PREFIX/lib/pkgconfig \
    PKG_CONFIG_ALLOW_CROSS=true \
    PKG_CONFIG_ALL_STATIC=true

# Install development libraries
RUN apt-get update && apt-get install -y \
    bison \
    flex \
    musl-dev \
    musl-tools

### OpenSSL
ARG SSL_VER
# Download OpenSSL
RUN curl -sSL "https://www.openssl.org/source/openssl-${SSL_VER}.tar.gz" | tar -xzC /src
# Build OpenSSL statically
RUN cd "/src/openssl-${SSL_VER}" \
    && ./Configure \
        no-shared \
        no-zlib \
        -fPIC \
        --prefix=$PREFIX \
        --openssldir=$PREFIX/ssl \
        linux-x86_64 \
    && $MAKE depend \
    && $MAKE \
    && $MAKE install
# Configure OpenSSL crate
ENV OPENSSL_STATIC=true \
    OPENSSL_NO_VENDOR=true

### PostgreSQL
ARG PQ_VER
# Download PostgreSQL
RUN curl -sSL "https://ftp.postgresql.org/pub/source/v${PQ_VER}/postgresql-${PQ_VER}.tar.gz" | tar -xzC /src
# Build PostgreSQL statically
RUN cd "/src/postgresql-${PQ_VER}" \
    && CPPFLAGS=-I$PREFIX/include LDFLAGS="-L$PREFIX/lib" \
        ./configure \
        --with-openssl \
        --without-readline \
        --without-zlib \
        --prefix=$PREFIX \
        --host=$TARGET \
    && ${MAKE} -C src/interfaces/libpq all-static-lib \
    && ${MAKE} -C src/interfaces/libpq install-lib-pc \
    && ${MAKE} -C src/interfaces/libpq install-lib-static \
    && ${MAKE} -C src/bin/pg_config \
    && ${MAKE} -C src/bin/pg_config install