Fix ruby 3.4 compatibility

Author: PikachuEXE

.github/workflows/ci.yml

@@ -8,11 +8,18 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['2.7', '3.0', '3.1', '3.2', '3.3'] # 3.4+ is not yet supported by google-protobuf
+        ruby:
+          - '2.7'
+          - '3.0'
+          - '3.1'
+          - '3.2'
+          - '3.3'
+          # Note: 3.4+ is not yet supported by google-protobuf
+          - '3.4.0-rc1'
         os: ['ubuntu-latest', 'windows-latest']
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby }}
@@ -21,4 +28,4 @@ jobs:
       run: bundle exec rake test
     - name: RuboCop
       run: bundle exec rake lint
-      if: matrix.ruby != '3.1' && matrix.ruby != '3.2' && matrix.ruby != '3.3'
+      if: matrix.ruby != '3.1' && matrix.ruby != '3.2' && matrix.ruby != '3.3' && matrix.ruby != '3.4.0-rc1'

ext/pg_query/extconf.rb

@@ -21,12 +21,36 @@
   $INCFLAGS = "-I#{File.join(__dir__, 'include', 'postgres', 'port', 'win32_msvc')} " + $INCFLAGS
 end
 
-SYMFILE =
-  if RUBY_PLATFORM =~ /freebsd/
-    File.join(__dir__, 'pg_query_ruby_freebsd.sym')
+def have_ruby_abi_version()
+  # ruby_abi_version is only available in development versions: https://github.com/ruby/ruby/pull/6231
+  return false if RUBY_PATCHLEVEL >= 0
+
+  m = /(\d+)\.(\d+)/.match(RUBY_VERSION)
+  if m.nil?
+    puts "Failed to parse ruby version: #{RUBY_VERSION}. Assuming ruby_abi_version symbol is NOT present."
+    return false
+  end
+  major = m[1].to_i
+  minor = m[2].to_i
+  if major >= 3 and minor >= 2
+    puts "Ruby version #{RUBY_VERSION} >= 3.2. Assuming ruby_abi_version symbol is present."
+    return true
+  end
+  puts "Ruby version #{RUBY_VERSION} < 3.2. Assuming ruby_abi_version symbol is NOT present."
+  false
+end
+
+def ext_export_filename()
+  name = if RUBY_PLATFORM =~ /freebsd/
+    'pg_query_ruby_freebsd'
   elsif RUBY_PLATFORM !~ /cygwin|mswin|mingw|bccwin|wince|emx/
-    File.join(__dir__, 'pg_query_ruby.sym')
+    'pg_query_ruby'
   end
+  name += '-with-ruby-abi-version' if have_ruby_abi_version()
+  "#{name}.sym"
+end
+
+SYMFILE = File.join(__dir__, ext_export_filename())
 
 if RUBY_PLATFORM =~ /darwin/
   $DLDFLAGS << " -Wl,-exported_symbols_list #{SYMFILE}" unless defined?(::Rubinius)

ext/pg_query/pg_query_ruby-with-ruby-abi-version.sym

@@ -0,0 +1,2 @@
+_Init_pg_query
+_ruby_abi_version

ext/pg_query/pg_query_ruby_freebsd-with-ruby-abi-version.sym

@@ -0,0 +1,2 @@
+Init_pg_query
+_ruby_abi_version