Problem with php-cli-alpine. Only for alpine version > 3.13 version. (docker-compose, php v7.4, php v8.1)

[Eugentis]

Hi
Last week I've detected that php:8.1-cli-alpine (same as php:7.4-cli-alpine with alpine version more than 3.13) have some problems with install iconv via docker-php-ext-install iconv

I have Dockerfile with lines like:

FROM php:8.1-cli-alpine3.14
....
RUN apk update \
    && apk add --no-cache  \
        oniguruma \
        oniguruma-dev \
        libgcrypt \
        libgcrypt-dev \
        libressl-dev \
        ca-certificates \
        pcre-dev \
        curl \
        libcurl \
        git \
        openssh-client \
        openssl-dev \
        wget \
        libmcrypt-dev \
        freetype-dev libpng-dev libjpeg-turbo-dev libxml2-dev autoconf g++ imagemagick-dev imagemagick libtool make \
        icu-dev \
        libxslt-dev \
        zip \
        nano \
        patch \
        gnu-libiconv \
        tmux \
        bash \
        libzip-dev \
        ${PHPIZE_DEPS} \
    && rm -rf /var/lib/apt/lists/*
...
RUN docker-php-ext-install \
        mbstring opcache iconv pdo \
        pdo pdo_mysql \
        gd dom exif intl json soap tokenizer xsl zip pcntl bcmath sockets \
        && docker-php-source delete \
        && apk del ${BUILD_DEPENDS}
...

And it fails at iconv install (checked on step-by-step allocation)

#10 71.54 In file included from /usr/src/php/ext/iconv/iconv.c:20:
#10 71.54 /usr/src/php/ext/iconv/config.h:56: note: this is the location of the previous definition
#10 71.54    56 | #define ICONV_BROKEN_IGNORE 1
#10 71.54       | 
#10 71.74 /usr/src/php/ext/iconv/iconv.c: In function 'zm_startup_miconv':
#10 71.74 /usr/src/php/ext/iconv/iconv.c:197:4: error: '_libiconv_version' undeclared (first use in this function)
#10 71.74   197 |    _libiconv_version >> 8, _libiconv_version & 0xff);
#10 71.74       |    ^~~~~~~~~~~~~~~~~
#10 71.74 /usr/src/php/ext/iconv/iconv.c:197:4: note: each undeclared identifier is reported only once for each function it appears in
#10 71.75 /usr/src/php/ext/iconv/iconv.c: In function '_php_iconv_appendl':
#10 71.75 /usr/src/php/ext/iconv/iconv.c:97:15: warning: implicit declaration of function 'libiconv'; did you mean 'zif_iconv'? [-Wimplicit-function-declaration]
#10 71.75    97 | #define iconv libiconv
#10 71.75       |               ^~~~~~~~
#10 71.75 /usr/src/php/ext/iconv/iconv.c:363:8: note: in expansion of macro 'iconv'
#10 71.75   363 |    if (iconv(cd, (char **)&in_p, &in_left, (char **) &out_p, &out_left) == (size_t)-1) {
#10 71.75       |        ^~~~~
#10 71.79 make: *** [Makefile:205: iconv.lo] Error 1

Project with php 7.4 worked fine about two weeks ago. No changes were made with docker files but at last week it fails.
The project was fixed by changing to version php:7.4-cli-alpine3.13.
But it can be made for php:8.1-cli-alpine project

Can you help to fix it?

[JerryVerhoef]

Same problem. With this smaller dockerfile:

FROM php:7.4.28-fpm-alpine3.15

RUN  docker-php-ext-install iconv

Tags which are not working for me: php:7.4.28-fpm-alpine3.15, php:7.4.28-fpm-alpine3.14, php:fpm-alpine, php::8.1.3-fpm-alpine3.15. I think all latest alpine images are broken.
The previous version is working for me: php:7.4.27-fpm-alpine3.15

Maybe related to: #1264

[JerryVerhoef]

It seems that iconv is enabled by default so removing it seems to be working fine.

[jonathantullett]

Yes, enabled by default:

$ docker run php:8.1.4-fpm-alpine3.15 php -m | grep iconv
iconv

[Eugentis]

@jonathantullett @JerryVerhoef Thanks for help with php8. Forgot to check it....

[wglambert]

Yep it's already in the image, also see #1264
And https://github.com/docker-library/docs/tree/master/php#how-to-install-more-php-extensions

Many extensions are already compiled into the image, so it's worth checking the output of php -m or php -i before going through the effort of compiling more.

$ docker run --rm php:8.1.4-fpm-alpine3.15 php -i | grep iconv
Configure Command =>  './configure'  '--build=x86_64-linux-musl' '--with-config-file-path=/usr/local/etc/php' '--with-config-file-scan-dir=/usr/local/etc/php/conf.d' '--enable-option-checking=fatal' '--with-mhash' '--with-pic' '--enable-ftp' '--enable-mbstring' '--enable-mysqlnd' '--with-password-argon2' '--with-sodium=shared' '--with-pdo-sqlite=/usr' '--with-sqlite3=/usr' '--with-curl' '--with-iconv=/usr' '--with-openssl' '--with-readline' '--with-zlib' '--disable-phpdbg' '--with-pear' '--disable-cgi' '--enable-fpm' '--with-fpm-user=www-data' '--with-fpm-group=www-data' 'build_alias=x86_64-linux-musl'
Registered Stream Filters => zlib.*, convert.iconv.*, string.rot13, string.toupper, string.tolower, convert.*, consumed, dechunk
iconv
iconv support => enabled
iconv implementation => libiconv
iconv library version => 1.16
iconv.input_encoding => no value => no value
iconv.internal_encoding => no value => no value
iconv.output_encoding => no value => no value

In php:alpine-3.13 iconv was also already enabled

$ docker run --rm php:fpm-alpine3.13 php -i | grep iconv
Registered Stream Filters => zlib.*, convert.iconv.*, string.rot13, string.toupper, string.tolower, convert.*, consumed, dechunk
iconv
iconv support => enabled
iconv implementation => unknown
iconv library version => unknown
iconv.input_encoding => no value => no value
iconv.internal_encoding => no value => no value
iconv.output_encoding => no value => no value

Closing since this is resolved