Alpine Linux for mruby build

Dockerfile

FROM alpine AS build

ARG TARGET

RUN apk add --no-cache \
      autoconf \
      automake \
      bison \
      curl \
      flex \
      g++ \
      gcc \
      libtool \
      make \
      musl-dev \
      patch \
      pkgconf

RUN curl -fsSL --retry 10 --retry-connrefused -o musl-cross-make-master.tar.gz \
      https://github.com/richfelker/musl-cross-make/archive/master.tar.gz

RUN tar -xf musl-cross-make-master.tar.gz && rm musl-cross-make-master.tar.gz

WORKDIR musl-cross-make-master

RUN echo "TARGET         = ${TARGET}"                          >  config.mak
RUN echo 'OUTPUT         = /usr/local'                         >> config.mak
RUN echo 'DL_CMD         = curl -fsSL'                         >> config.mak
RUN echo 'DL_CMD        += --retry 10'                         >> config.mak
RUN echo 'DL_CMD        += --retry-connrefused'                >> config.mak
RUN echo 'DL_CMD        += -o'                                 >> config.mak
RUN echo 'GNU_SITE       = http://ftpmirror.gnu.org/'          >> config.mak
RUN echo 'COMMON_CONFIG += CFLAGS="-g0 -Os"'                   >> config.mak
RUN echo 'COMMON_CONFIG += CXXFLAGS="-g0 -Os"'                 >> config.mak
RUN echo 'COMMON_CONFIG += LDFLAGS="-s"'                       >> config.mak
RUN echo 'COMMON_CONFIG += --disable-nls'                      >> config.mak
RUN echo 'GCC_CONFIG    += --enable-languages=c,c++'           >> config.mak
RUN echo 'GCC_CONFIG    += --disable-libquadmath'              >> config.mak
RUN echo 'GCC_CONFIG    += --disable-decimal-float'            >> config.mak
RUN echo 'GCC_CONFIG    += --enable-default-pie'               >> config.mak
RUN echo 'GCC_CONFIG    += --enable-default-ssp'               >> config.mak
RUN echo 'COMMON_CONFIG += --with-debug-prefix-map=$(CURDIR)=' >> config.mak

RUN sed -i -Ee 's@tar zxvf@tar zxf@' Makefile
RUN sed -i -Ee 's@tar jxvf@tar jxf@' Makefile
RUN sed -i -Ee 's@tar Jxvf@tar Jxf@' Makefile

RUN make -j $(nproc) install

WORKDIR ..

RUN curl -fsSL --retry 10 --retry-connrefused -o musl-fts-master.tar.gz \
      https://github.com/pullmoll/musl-fts/archive/master.tar.gz

RUN tar -xf musl-fts-master.tar.gz && rm musl-fts-master.tar.gz

WORKDIR musl-fts-master

RUN ./bootstrap.sh
RUN ./configure --prefix=/usr/local${TARGET} \
      --build=x86_64-alpine-linux-musl --host=${TARGET}
RUN make -j $(nproc) install

FROM alpine

COPY --from=build /usr/local /usr/local

RUN apk add --no-cache \
      autoconf \
      automake \
      bash \
      bison \
      curl \
      file \
      flex \
      fts-dev \
      g++ \
      gcc \
      git \
      libtool \
      make \
      musl-dev \
      patch \
      pkgconf \
      ruby \
      ruby-rake \
      wget \
 && mkdir /mruby

WORKDIR /mruby