Add bin and edit workflow

bin/gems/bigdecimal-3.1.9/ext/bigdecimal/extconf.rb

@@ -0,0 +1,64 @@
+# frozen_string_literal: false
+require 'mkmf'
+
+def have_builtin_func(name, check_expr, opt = "", &b)
+  checking_for checking_message(name.funcall_style, nil, opt) do
+    if try_compile(<<SRC, opt, &b)
+int foo;
+int main() { #{check_expr}; return 0; }
+SRC
+      $defs.push(format("-DHAVE_BUILTIN_%s", name.tr_cpp))
+      true
+    else
+      false
+    end
+  end
+end
+
+have_builtin_func("__builtin_clz", "__builtin_clz(0)")
+have_builtin_func("__builtin_clzl", "__builtin_clzl(0)")
+have_builtin_func("__builtin_clzll", "__builtin_clzll(0)")
+
+have_header("float.h")
+have_header("math.h")
+have_header("stdbool.h")
+have_header("stdlib.h")
+
+if have_header("x86intrin.h")
+  have_func("_lzcnt_u32", "x86intrin.h")
+  have_func("_lzcnt_u64", "x86intrin.h")
+end
+
+if have_header("intrin.h")
+  have_func("__lzcnt", "intrin.h")
+  have_func("__lzcnt64", "intrin.h")
+  have_func("_BitScanReverse", "intrin.h")
+  have_func("_BitScanReverse64", "intrin.h")
+end
+
+have_func("labs", "stdlib.h")
+have_func("llabs", "stdlib.h")
+have_func("finite", "math.h")
+have_func("isfinite", "math.h")
+
+have_header("ruby/atomic.h")
+have_header("ruby/internal/has/builtin.h")
+have_header("ruby/internal/static_assert.h")
+
+have_func("rb_rational_num", "ruby.h")
+have_func("rb_rational_den", "ruby.h")
+have_func("rb_complex_real", "ruby.h")
+have_func("rb_complex_imag", "ruby.h")
+have_func("rb_opts_exception_p", "ruby.h")
+have_func("rb_category_warn", "ruby.h")
+have_const("RB_WARN_CATEGORY_DEPRECATED", "ruby.h")
+
+if File.file?(File.expand_path('../lib/bigdecimal.rb', __FILE__))
+  bigdecimal_rb = "$(srcdir)/lib/bigdecimal.rb"
+else
+  bigdecimal_rb = "$(srcdir)/../../lib/bigdecimal.rb"
+end
+
+create_makefile('bigdecimal') {|mf|
+  mf << "BIGDECIMAL_RB = #{bigdecimal_rb}\n"
+}