installing php-gd dependencies on alpine linux in php5-fpm-alpine docker container

english
#1

Trying to install GD dependencies on alpine linux in docker.

I'm building php5-fpm-alpine image.

FROM php:5-fpm-alpine
RUN docker-php-ext-install mysqli
RUN apk upgrade --update && apk add \
        libfreetype6-dev \
        libjpeg62-turbo-dev \
        libmcrypt-dev \
        libpng12-dev \
    && docker-php-ext-install -j$(nproc) mcrypt \
    && docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
    && docker-php-ext-install -j$(nproc) gd

I get error:

ERROR: unsatisfiable constraints:
  libfreetype6-dev (missing):
    required by: world[libfreetype6-dev]
  libjpeg62-turbo-dev (missing):
    required by: world[libjpeg62-turbo-dev]
  libpng12-dev (missing):
    required by: world[libpng12-dev]

I've limited experience with alpine distro. and it seems to be not very popular, ergo little information or not at all via google.

#2

The package names in the example from docker hub are for the debian version. You must use the packages from alpine. You can search for alpine packages here: https://pkgs.alpinelinux.org/packages.

The following should work:

FROM php:5-fpm-alpine
RUN docker-php-ext-install mysqli
RUN apk upgrade --update && apk add \
  coreutils \
  freetype-dev \
  libjpeg-turbo-dev \
  libltdl \
  libmcrypt-dev \
  libpng-dev \
&& docker-php-ext-install -j$(nproc) iconv mcrypt \
&& docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
&& docker-php-ext-install -j$(nproc) gd