FROM alpine:3.8

RUN apk add --no-cache \
    alpine-sdk \
    autoconf \
    automake \
    file \
    flex \
    libressl-dev \
    libtool \
    re2c

ENV PHP_VERSION=7.2.8

RUN cd /tmp \
 && curl -OsS http://php.net/distributions/php-${PHP_VERSION}.tar.gz \
 && tar zxof php-${PHP_VERSION}.tar.gz

ENV CFLAGS="-O3 -march=x86-64"
ENV LDFLAGS="-s -static"

RUN cd /tmp/php-${PHP_VERSION} \
 && ./configure \
    EXTENSION_DIR="/usr/lib/php" \

    --prefix=/usr \
    --sysconfdir=/etc/php/cli \
    --with-config-file-path=/etc/php/cli \
    --with-config-file-scan-dir=/etc/php/cli/conf.d \

    --enable-static=yes \
    --enable-shared=no \
    --disable-all \
    --with-openssl \

    --enable-cli \
    --disable-fpm \
    --disable-cgi \
    --disable-phpdbg \
 && make -j$(grep "cpu cores" /proc/cpuinfo | wc -l) \
 && make install