[Ruby] MSYS2 packages needed for Gandiva

[asfimport]

require "gandiva"

table = Arrow::Table.new(:field1 => Arrow::Int32Array.new([1, 2, 3, 4]),
                         :field2 => Arrow::Int32Array.new([11, 13, 15, 17]))
schema = table.schema

expression1 = schema.build_expression do |record|
  record.field1 + record.field2
end

expression2 = schema.build_expression do |record, context|
  context.if(record.field1 > record.field2)
    .then(record.field1 / record.field2)
    .else(record.field1)
end

projector = Gandiva::Projector.new(schema, [expression1, expression2])
table.each_record_batch do |record_batch|
  outputs = projector.evaluate(record_batch)
  puts outputs.collect(&:values)
end

C:\Users\Dominic E Sisneros\source\repos\ruby\try_arrow>ruby gandiva_test2.rb
Traceback (most recent call last):
        2: from gandiva_test2.rb:1:in `<main>'
        1: from c:/Ruby27-x64/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:92:in `require'
c:/Ruby27-x64/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:92:in `require': cannot load such file -- gandiva (LoadError)
        9: from gandiva_test2.rb:1:in `<main>'
        8: from c:/Ruby27-x64/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:156:in `require'
        7: from c:/Ruby27-x64/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:168:in `rescue in require'
        6: from c:/Ruby27-x64/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:168:in `require'
        5: from c:/Ruby27-x64/lib/ruby/gems/2.7.0/gems/red-gandiva-0.16.0/lib/gandiva.rb:24:in `<top (required)>'
        4: from c:/Ruby27-x64/lib/ruby/gems/2.7.0/gems/red-gandiva-0.16.0/lib/gandiva.rb:28:in `<module:Gandiva>'
        3: from c:/Ruby27-x64/lib/ruby/gems/2.7.0/gems/red-gandiva-0.16.0/lib/gandiva/loader.rb:22:in `load'
        2: from c:/Ruby27-x64/lib/ruby/gems/2.7.0/gems/gobject-introspection-3.4.1/lib/gobject-introspection/loader.rb:25:in `load'
        1: from c:/Ruby27-x64/lib/ruby/gems/2.7.0/gems/gobject-introspection-3.4.1/lib/gobject-introspection/loader.rb:37:in `load'
c:/Ruby27-x64/lib/ruby/gems/2.7.0/gems/gobject-introspection-3.4.1/lib/gobject-introspection/loader.rb:37:in `require': Typelib file for namespace 'Gandiva' (any version) not found (GObjectIntrospection::RepositoryError::TypelibNotFound)

Environment: windows with rubyinstaller
Reporter: Dominic Sisneros / @dsisnero
Assignee: Kouhei Sutou / @kou

_{Note: This issue was originally created as ARROW-7843. Please see the migration documentation for further details.}

[asfimport]

Kouhei Sutou / @kou:
I removed "arrow-cuda" from title because Gandiva doesn't require CUDA support.

MSYS2 has LLVM 9.0.0 package https://github.com/msys2/MINGW-packages/blob/master/mingw-w64-clang/PKGBUILD but we supports only LLVM 7 for now. We need to support LLVM 9 to resolve this.

LLVM 8 support is working on ARROW-6841 for now.

[asfimport]

Kouhei Sutou / @kou:
MSYS2 uses LLVM 10. We need to support LLVM 10 to resolve this.

[asfimport]

Dominic Sisneros / @dsisnero:
Any update on Gandiva support? I want to try to create a sequel like dataset api for arrow and would like to use gandiva to compile the expressions

[asfimport]

Wes McKinney / @wesm:
FYI some of us are working actively on "interpreted" execution of expressions without an LLVM dependency (see recent PR 7ad49ee)

[asfimport]

Kouhei Sutou / @kou:
Now available: https://packages.msys2.org/package/mingw-w64-x86_64-arrow?repo=mingw64

[asfimport]

Dominic Sisneros / @dsisnero:
Thank you - I pushed to get it uploaded to the pacman repository on the gitter channel since it was taking so long. https://gitter.im/msys2/msys2. Thanks for all your work