# crosstool.common
#
# Common Docker instructions to install "crosstool-ng" and build a full
# cross-compiler suite from a crosstool-ng configuration, CROSSTOOL_CONFIG.
#
# This import complements the "dockcross/base" image, adding:
# - "ct-ng", a cross-compiler building utilty.
# - A cross-compiler suite configured in "crosstool-ng.config".
#
# The generated cross-compiler will have a CROSS_ROOT of:
#   ${XCC_PREFIX}/${CROSS_TRIPLE}
#
# A given platform will need to supply the appropriate "crosstool-ng.config" to
# generate its cross-compiler. This can be built using "ct-ng menuconfig" to
# generate a configuration.

# Install Debian packages required for `ct-ng`.
RUN apt-get update --yes && apt-get install --no-install-recommends --yes \
    gawk \
    gperf \
    help2man \
    python3-dev \
    texinfo \
# Packages needed for crosstool-ng 1.24 or higher 
    unzip \
    libtool \
    libtool-bin \
    && apt-get clean autoclean --yes \
    && apt-get autoremove --yes \
    && rm -rf /var/lib/{apt,dpkg,cache,log}/

ENV XCC_PREFIX=/usr/xcc

# Add the crosstool-ng script and image-specific toolchain configuration into
# /dockcross/.
#
# Afterwards, we will leave the "ct-ng" config in the image as a reference
# for users.
COPY \
  imagefiles/install-crosstool-ng-toolchain.sh \
  imagefiles/patch/crosstool-ng/crosstool-ng-zlib-target.patch \
  crosstool-ng.config \
  /dockcross/

# Build and install the toolchain, cleaning up artifacts afterwards.
RUN mkdir /dockcross/crosstool \
&& cd /dockcross/crosstool \
&& /dockcross/install-crosstool-ng-toolchain.sh \
  -p "${XCC_PREFIX}" \
  -c "/dockcross/crosstool-ng.config" \
  -v "${CT_VERSION}" \
&& rm -rf /dockcross/crosstool /dockcross/install-crosstool-ng-toolchain.sh

# Restore our default workdir (from "dockcross/base").
WORKDIR /work