From 79215819c47c74a02456776a63b5bffc8de8173f Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Tue, 1 Sep 2026 10:35:20 +0900
Subject: [PATCH 1/3] Move the rules for win32_vk

Enable the rules only when `gperf` command is available.  And replace
`gperf.sed` with `extract-vk.rb` script.

ruby/ruby@3d4e682dafd988b50d1050dcbc90dd49c17382bc
---
 ext/io/console/extconf.rb              | 16 +++++++++++++++-
 ext/io/console/extract-vk.rb           | 13 ++++++++++++-
 ext/io/console/{depend => win32_vk.mk} |  8 +++-----
 tool/gperf.sed                         |  4 ----
 4 files changed, 30 insertions(+), 11 deletions(-)
 rename ext/io/console/{depend => win32_vk.mk} (60%)
 delete mode 100644 tool/gperf.sed

diff --git a/ext/io/console/extconf.rb b/ext/io/console/extconf.rb
index d10bdcfe..fb058f61 100644
--- a/ext/io/console/extconf.rb
+++ b/ext/io/console/extconf.rb
@@ -52,8 +52,22 @@
   have_const("RB_WARN_CATEGORY_DEPRECATED")
   win32 or have_func("ttyname_r") or have_func("ttyname")
   have_func("rb_prepend_module") # not exported by TruffleRuby
+  vk_tool = find_executable("gperf")
   create_makefile("io/console") {|conf|
-    conf << "\n""VK_HEADER = #{vk_header}\n"
+    if vk_header
+      conf << <<~MK
+        VK_HEADER = #{vk_header}
+        all:
+        console.#$OBJEXT: $(VK_HEADER)
+      MK
+    end
+    if vk_tool
+      unless conf.any? {|c| /^ *top_srcdir *=/.match?(c)}
+        conf << "top_srcdir = $(srcdir)/../../..\n"
+      end
+      conf.concat(depend_rules(File.read("#$srcdir/win32_vk.mk")))
+    end
+    conf
   }
 when nil
   File.write("Makefile", dummy_makefile($srcdir).join(""))
diff --git a/ext/io/console/extract-vk.rb b/ext/io/console/extract-vk.rb
index 387d5b38..94c3bac7 100644
--- a/ext/io/console/extract-vk.rb
+++ b/ext/io/console/extract-vk.rb
@@ -1,7 +1,18 @@
 code = [+""]
-ARGF.read.scan(/^\w+,\s*\KVK_\w+/) do |n|
+source = File.read(ARGV.shift)
+source.scan(/^\w+,\s*\KVK_\w+/) do |n|
   puts("#ifndef #{n}\n# define #{n} UNDEFINED_VK\n#endif")
   code << +"" if n.size + code.last.size > 60
   code.last << " x(#{n})z"
 end
 puts ["#define EACH_VK(x,z)", code].join(" \\\n    "), ""
+IO.popen(["gperf", *ARGV], "r+") do |f|
+  w = Thread.start {
+    f.puts source
+    f.close_write
+  }
+  puts f.read.sub(/^\w*hash .*\{(?m:.*?)\n\}/) {
+    $&.sub!(" hval = ", " hval = (unsigned int)")
+  }
+  w.join
+end
diff --git a/ext/io/console/depend b/ext/io/console/win32_vk.mk
similarity index 60%
rename from ext/io/console/depend
rename to ext/io/console/win32_vk.mk
index 73638fe7..97757a05 100644
--- a/ext/io/console/depend
+++ b/ext/io/console/win32_vk.mk
@@ -1,11 +1,9 @@
 win32_vk.inc: win32_vk.list $(srcdir)/extract-vk.rb
 
 .list.inc:
-	( \
-	$(RUBY) $(srcdir)/extract-vk.rb $< && \
-	gperf --ignore-case -L ANSI-C -E -C -P -p -j1 -i 1 -g -o -t -K ofs -N console_win32_vk -k* $< \
-	| sed -f $(top_srcdir)/tool/gperf.sed \
-	) > $(@F)
+	$(Q)$(RUBY) $(srcdir)/extract-vk.rb $< \
+	    --ignore-case -L ANSI-C -E -C -P -p -j1 -i 1 -g -o -t -K ofs -N console_win32_vk -k* \
+	    > $(@F)
 
 .SUFFIXES: .chksum .list .inc
 
diff --git a/tool/gperf.sed b/tool/gperf.sed
deleted file mode 100644
index 9550a522..00000000
--- a/tool/gperf.sed
+++ /dev/null
@@ -1,4 +0,0 @@
-/^[a-zA-Z_0-9]*hash/,/^}/{
-  s/ hval = / hval = (unsigned int)/
-  s/ return / return (unsigned int)/
-}

From ff6c22cb9f5a84bee404f5e5723144cf11d2fae9 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 2 Sep 2026 14:34:10 +0900
Subject: [PATCH 2/3] Add generated dependency rules

Keep generated dependency metadata in the upstream repository so it
can be updated there and synchronized into ruby/ruby.
---
 ext/io/console/depend | 3 +++
 1 file changed, 3 insertions(+)
 create mode 100644 ext/io/console/depend

diff --git a/ext/io/console/depend b/ext/io/console/depend
new file mode 100644
index 00000000..e7555961
--- /dev/null
+++ b/ext/io/console/depend
@@ -0,0 +1,3 @@
+# AUTOGENERATED DEPENDENCIES START
+console.o: console.c
+# AUTOGENERATED DEPENDENCIES END

From 207a809235d424effbbc2877dd121bd7baadb103 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 2 Sep 2026 14:42:21 +0900
Subject: [PATCH 3/3] Fix the main target

---
 ext/io/console/extconf.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ext/io/console/extconf.rb b/ext/io/console/extconf.rb
index fb058f61..65d36057 100644
--- a/ext/io/console/extconf.rb
+++ b/ext/io/console/extconf.rb
@@ -54,10 +54,10 @@
   have_func("rb_prepend_module") # not exported by TruffleRuby
   vk_tool = find_executable("gperf")
   create_makefile("io/console") {|conf|
+    conf << "###\n" "all: # the default target\n"
     if vk_header
       conf << <<~MK
         VK_HEADER = #{vk_header}
-        all:
         console.#$OBJEXT: $(VK_HEADER)
       MK
     end