Error on Ruby 3.2.2: "error: ‘rb_cData’ undeclared"

[jordan-brough]

When I try to build the following Dockerfile, which uses Ruby 3.2.2:

FROM amazon/aws-lambda-ruby:3.2.2023.06.12.17

RUN curl -O https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
RUN rpm -ivh epel-release-latest-7.noarch.rpm
RUN yum -y update
RUN yum -y install git-core zlib zlib-devel gcc-c++ patch readline readline-devel libyaml-devel libffi-devel openssl-devel make bzip2 autoconf automake libtool bison sqlite-devel
RUN yum -y install firebird firebird-devel
RUN gem install fb

I get an error like:

#10 3.196 fb.c:2944:61: error: ‘rb_cData’ undeclared (first use in this function); did you mean ‘rb_cDate’?
#10 3.196   rb_cFbDatabase = rb_define_class_under(rb_mFb, "Database", rb_cData);
#10 3.196                                                              ^~~~~~~~

Click here to show full error details

``` #10 [7/7] RUN gem install fb #10 1.041 Building native extensions. This could take a while... #10 3.147 ERROR: Error installing fb: #10 3.147 ERROR: Failed to build gem native extension. #10 3.147 #10 3.147 current directory: /var/lang/lib/ruby/gems/3.2.0/gems/fb-0.9.3 #10 3.147 /var/lang/bin/ruby extconf.rb #10 3.147 checking for isc_attach_database() in -lfbclient... yes #10 3.147 creating Makefile #10 3.147 #10 3.147 current directory: /var/lang/lib/ruby/gems/3.2.0/gems/fb-0.9.3 #10 3.147 make DESTDIR\= sitearchdir\=./.gem.20230623-1-v2p295 sitelibdir\=./.gem.20230623-1-v2p295 clean #10 3.147 #10 3.147 current directory: /var/lang/lib/ruby/gems/3.2.0/gems/fb-0.9.3 #10 3.147 make DESTDIR\= sitearchdir\=./.gem.20230623-1-v2p295 sitelibdir\=./.gem.20230623-1-v2p295 #10 3.147 compiling fb.c #10 3.147 fb.c: In function ‘fb_cursor_fields_ary’: #10 3.147 fb.c:1675:11: warning: implicit declaration of function ‘rb_tainted_str_new’; did you mean ‘rb_utf8_str_new’? [-Wimplicit-function-declaration] #10 3.147 name = rb_tainted_str_new(var->aliasname, var->aliasname_length); #10 3.147 ^~~~~~~~~~~~~~~~~~ #10 3.147 rb_utf8_str_new #10 3.147 fb.c: In function ‘Init_fb’: #10 3.147 fb.c:2938:6: warning: old-style function definition [-Wold-style-definition] #10 3.147 void Init_fb() #10 3.147 ^~~~~~~ #10 3.147 fb.c:2944:61: error: ‘rb_cData’ undeclared (first use in this function); did you mean ‘rb_cDate’? #10 3.147 rb_cFbDatabase = rb_define_class_under(rb_mFb, "Database", rb_cData); #10 3.147 ^~~~~~~~ #10 3.147 rb_cDate #10 3.147 fb.c:2944:61: note: each undeclared identifier is reported only once for each function it appears in #10 3.147 fb.c: At top level: #10 3.147 cc1: warning: unrecognized command line option ‘-Wno-self-assign’ #10 3.147 cc1: warning: unrecognized command line option ‘-Wno-parentheses-equality’ #10 3.147 cc1: warning: unrecognized command line option ‘-Wno-constant-logical-operand’ #10 3.147 cc1: warning: unrecognized command line option ‘-Wno-cast-function-type’ #10 3.147 make: *** [fb.o] Error 1 #10 3.147 #10 3.147 make failed, exit code 2 #10 3.147 #10 3.147 Gem files will remain installed in /var/lang/lib/ruby/gems/3.2.0/gems/fb-0.9.3 for inspection. #10 3.147 Results logged to /var/lang/lib/ruby/gems/3.2.0/extensions/x86_64-linux/3.2.0/fb-0.9.3/gem_make.out #10 ERROR: process "/bin/sh -c gem install fb" did not complete successfully: exit code: 1 ------ > [7/7] RUN gem install fb: #10 3.147 cc1: warning: unrecognized command line option ‘-Wno-self-assign’ #10 3.147 cc1: warning: unrecognized command line option ‘-Wno-parentheses-equality’ #10 3.147 cc1: warning: unrecognized command line option ‘-Wno-constant-logical-operand’ #10 3.147 cc1: warning: unrecognized command line option ‘-Wno-cast-function-type’ #10 3.147 make: *** [fb.o] Error 1 #10 3.147 #10 3.147 make failed, exit code 2 #10 3.147 #10 3.147 Gem files will remain installed in /var/lang/lib/ruby/gems/3.2.0/gems/fb-0.9.3 for inspection. #10 3.147 Results logged to /var/lang/lib/ruby/gems/3.2.0/extensions/x86_64-linux/3.2.0/fb-0.9.3/gem_make.out ------ Dockerfile:57 -------------------- 55 | RUN yum -y install git-core zlib zlib-devel gcc-c++ patch readline readline-devel libyaml-devel libffi-devel openssl-devel make bzip2 autoconf automake libtool bison sqlite-devel 56 | RUN yum -y install firebird firebird-devel 57 | >>> RUN gem install fb -------------------- ERROR: failed to solve: process "/bin/sh -c gem install fb" did not complete successfully: exit code: 1 ```

---

In case it's helpful, if you comment out the final line of the Dockerfile, you can build the image and start a bash shell to experiment with installing the gem:

$ docker build --platform linux/amd64 --tag ruby-firebird .
$ docker run --platform linux/amd64 --rm -it --entrypoint='' ruby-firebird /bin/bash

[dmakurin]

RubyGems has an older version. Install the gem from this repo. You need either to build a gemspec and install it manually or use bundler and a github option.

[jordan-brough]

@dmakurin thank you! This sample Dockerfile works for me:

FROM amazon/aws-lambda-ruby:3.2.2023.06.12.17

RUN curl -O https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
RUN rpm -ivh epel-release-latest-7.noarch.rpm
RUN yum -y update
RUN yum -y install git-core zlib zlib-devel gcc-c++ patch readline readline-devel libyaml-devel libffi-devel openssl-devel make bzip2 autoconf automake libtool bison sqlite-devel
RUN yum -y install firebird firebird-devel

RUN echo "source 'https://rubygems.org'" >> Gemfile
RUN echo "git_source(:github) { |repo| \"https://github.com/#{repo}.git\" }" >> Gemfile
RUN echo "gem 'fb', github: 'rowland/fb', ref: 'dd4552d'" >> Gemfile

RUN bundle

[jordan-brough]

@rowland any chance you could publish the latest version of the gem to Rubygems?