Added vcpkg manifest for windows build environment.

"builtin-baseline": "53bef8994c541b6561884a8395ea35715ece75db" is 2024.01.12
released version of vcpkg.

https://github.com/microsoft/vcpkg/releases/tag/2024.01.12

.gitignore

@@ -138,6 +138,7 @@ lcov*.info
 /test.rb
 /test-coverage.dat
 /tmp
+/vcpkg_installed
 /transdb.h
 /uncommon.mk
 /verconf.h

doc/windows.md

@@ -88,10 +88,11 @@ make
     scoop install git ruby sed patch
     ```
 
-5. You need to install required libraries using [vcpkg](https://vcpkg.io/) like:
+5.  You need to install required libraries using [vcpkg](https://vcpkg.io/) on
+    directory of ruby repository like:
 
     ```
-    vcpkg --triplet x64-windows install openssl libffi libyaml zlib
+    vcpkg --triplet x64-windows install
     ```
 
 6.  Enable Command Extension of your command line.  It's the default behavior
@@ -117,7 +118,7 @@ make
     executable without console window if also you want.
 
 3.  You need specify vcpkg directory to use `--with-opt-dir`
-    option like `configure --with-opt-dir=C:\vcpkg\installed\x64-windows`
+    option like `win32\configure.bat --with-opt-dir=vcpkg_installed\x64-windows`
 
 4.  Run `nmake up` if you are building from GIT source.
 

vcpkg.json

@@ -0,0 +1,11 @@
+{
+    "$schema": "https://raw.githubusercontent.com/microsoft/vcpkg-tool/main/docs/vcpkg.schema.json",
+    "dependencies": [
+      "gmp",
+      "libffi",
+      "libyaml",
+      "openssl",
+      "zlib"
+    ],
+    "builtin-baseline": "53bef8994c541b6561884a8395ea35715ece75db"
+}