1 files changed, 19 insertions, 0 deletions
diff --git a/ext/json/generator/extconf.rb b/ext/json/generator/extconf.rb
new file mode 100644
index 0000000000..33af03ea30
--- /dev/null
+++ b/ext/json/generator/extconf.rb
@@ -0,0 +1,19 @@
+require 'mkmf'
+
+if RUBY_ENGINE == 'truffleruby'
+  # The pure-Ruby generator is faster on TruffleRuby, so skip compiling the generator extension
+  File.write('Makefile', dummy_makefile("").join)
+else
+  append_cflags("-std=c99")
+  have_const("RUBY_TYPED_EMBEDDABLE", "ruby.h") # RUBY_VERSION >= 3.3
+  have_func("ruby_xfree_sized", "ruby.h") # RUBY_VERSION >= 4.1
+
+  $defs << "-DJSON_GENERATOR"
+  $defs << "-DJSON_DEBUG" if ENV.fetch("JSON_DEBUG", "0") != "0"
+
+  if enable_config('generator-use-simd', default=!ENV["JSON_DISABLE_SIMD"])
+    load __dir__ + "/../simd/conf.rb"
+  end
+
+  create_makefile 'json/ext/generator'
+end