docs.patch

From: Peter Kokot <peterkokot@gmail.com>
Subject: Add docs related to CMake

These are only quick README adjustments and fixes on how to use CMake
with PHP.
---
 README.md | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/README.md b/README.md
index c5376f67725..2675e91239f 100644
--- a/README.md
+++ b/README.md
@@ -35,8 +35,30 @@ For other systems, see the [installation chapter](https://www.php.net/install).
 
 ### Building PHP source code
 
+#### CMake
+
+On Debian-based systems:
+
+    sudo apt install -y cmake gcc g++ bison libsqlite3-dev
+
+On Fedora-based systems:
+
+    sudo dnf install cmake gcc gcc-c++ bison sqlite-devel
+
+Generate build system:
+
+    cmake -S . -B php-build
+
+Build PHP:
+
+    cmake --build php-build -j
+
+#### Windows using JScript
+
 *For Windows, see [Build your own PHP on Windows](https://wiki.php.net/internals/windows/stepbystepbuild_sdk_2).*
 
+#### Autotools
+
 For a minimal PHP build from Git, you will need autoconf, bison, and re2c. For
 a default build, you will additionally need libxml2 and libsqlite3.