chore: bump CMake policy max to 4.3, list core-nanobind-shared (#77)

henryiii · web-flow · commit 8becb29d24de · 2026-07-03T03:48:14.000-04:00
* chore: bump CMake policy max to 4.3 and list core-nanobind-shared

Set the upper bound of every `cmake_minimum_required(VERSION min...max)`
range to 4.3 uniformly across the sample projects, and add the
`core-nanobind-shared` example to the top-level README project table.

Assisted-by: ClaudeCode:claude-opus-4.8

* fix: keep CMake max at 3.26 for legacy FindPythonExtensions projects

find_package(PythonExtensions) pulls in FindPythonInterp, which CMake
removed in 3.27; capping the policy max below 3.27 keeps it available.

Assisted-by: ClaudeCode:claude-opus-4.8
diff --git a/README.md b/README.md
@@ -20,6 +20,7 @@ configured via `[tool.scikit-build]`.
 | [`core-c-hello`](projects/core-c-hello) | Raw C extension |
 | [`core-cython-hello`](projects/core-cython-hello) | Cython via [cython-cmake](https://github.com/scikit-build/cython-cmake) |
 | [`core-pybind11-hello`](projects/core-pybind11-hello) | pybind11 binding |
+| [`core-nanobind-shared`](projects/core-nanobind-shared) | [nanobind](https://nanobind.readthedocs.io) binding linking a shared library shipped in the wheel |
 | [`hello-cmake-package`](projects/hello-cmake-package) | Standalone C library, exported CMake package, and pybind11 wrapper |
 | [`hello-free-threading`](projects/hello-free-threading) | Free-threaded (no-GIL) build; requires Python 3.13+ |
 | [`pi-fortran`](projects/pi-fortran) | Fortran via f2py and [f2py-cmake](https://github.com/scikit-build/f2py-cmake) |
diff --git a/projects/core-c-hello/CMakeLists.txt b/projects/core-c-hello/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15...3.26)
+cmake_minimum_required(VERSION 3.15...4.3)
 
 project(${SKBUILD_PROJECT_NAME} VERSION ${SKBUILD_PROJECT_VERSION} LANGUAGES C)
 
diff --git a/projects/core-cython-hello/CMakeLists.txt b/projects/core-cython-hello/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15...3.26)
+cmake_minimum_required(VERSION 3.15...4.3)
 
 project(${SKBUILD_PROJECT_NAME} VERSION ${SKBUILD_PROJECT_VERSION} LANGUAGES C)
 
diff --git a/projects/core-nanobind-shared/CMakeLists.txt b/projects/core-nanobind-shared/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15...3.30)
+cmake_minimum_required(VERSION 3.15...4.3)
 
 project(${SKBUILD_PROJECT_NAME} VERSION ${SKBUILD_PROJECT_VERSION} LANGUAGES CXX)
 
diff --git a/projects/core-pybind11-hello/CMakeLists.txt b/projects/core-pybind11-hello/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15...3.26)
+cmake_minimum_required(VERSION 3.15...4.3)
 
 project(${SKBUILD_PROJECT_NAME} VERSION ${SKBUILD_PROJECT_VERSION} LANGUAGES CXX)
 
diff --git a/projects/hatchling-pybind11-hello/CMakeLists.txt b/projects/hatchling-pybind11-hello/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15...3.29)
+cmake_minimum_required(VERSION 3.15...4.3)
 
 project(${SKBUILD_PROJECT_NAME} VERSION ${SKBUILD_PROJECT_VERSION} LANGUAGES CXX)
 
diff --git a/projects/hello-cmake-package/CMakeLists.txt b/projects/hello-cmake-package/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15...3.26)
+cmake_minimum_required(VERSION 3.15...4.3)
 
 project(
   hello
diff --git a/projects/hello-cmake-package/tests/cpp/CMakeLists.txt b/projects/hello-cmake-package/tests/cpp/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.14...3.19)
+cmake_minimum_required(VERSION 3.14...4.3)
 
 project(hello-user VERSION 0.1.0)
 
diff --git a/projects/hello-cpp/CMakeLists.txt b/projects/hello-cpp/CMakeLists.txt
@@ -1,3 +1,4 @@
+# Max stays <3.27: find_package(PythonExtensions) needs FindPythonInterp, removed in 3.27
 cmake_minimum_required(VERSION 3.15...3.26)
 
 project(hello)
diff --git a/projects/hello-cython/CMakeLists.txt b/projects/hello-cython/CMakeLists.txt
@@ -1,3 +1,4 @@
+# Max stays <3.27: find_package(PythonExtensions) needs FindPythonInterp, removed in 3.27
 cmake_minimum_required(VERSION 3.15...3.26)
 
 project(hello_cython)
diff --git a/projects/hello-free-threading/CMakeLists.txt b/projects/hello-free-threading/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15...3.29)
+cmake_minimum_required(VERSION 3.15...4.3)
 
 project(FreeComputePi LANGUAGES CXX)
 
diff --git a/projects/hello-pybind11/CMakeLists.txt b/projects/hello-pybind11/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15...3.26)
+cmake_minimum_required(VERSION 3.15...4.3)
 
 project(hello-pybind11 VERSION "0.1")
 
diff --git a/projects/pen2-cython/CMakeLists.txt b/projects/pen2-cython/CMakeLists.txt
@@ -1,3 +1,4 @@
+# Max stays <3.27: find_package(PythonExtensions) needs FindPythonInterp, removed in 3.27
 cmake_minimum_required(VERSION 3.15...3.26)
 
 project(pen2_cython)
diff --git a/projects/pi-fortran/CMakeLists.txt b/projects/pi-fortran/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.17.2...3.29)
+cmake_minimum_required(VERSION 3.17.2...4.3)
 
 project(pi
   VERSION 1.0.1
diff --git a/projects/tower-of-babel/CMakeLists.txt b/projects/tower-of-babel/CMakeLists.txt
@@ -1,3 +1,4 @@
+# Max stays <3.27: find_package(PythonExtensions) needs FindPythonInterp, removed in 3.27
 cmake_minimum_required(VERSION 3.15...3.26)
 
 project(tower_of_babel)

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-cmake_minimum_required(VERSION 3.15...3.26)`
	`1`	`+cmake_minimum_required(VERSION 3.15...4.3)`
`2`	`2`
`3`	`3`	`project(${SKBUILD_PROJECT_NAME} VERSION ${SKBUILD_PROJECT_VERSION} LANGUAGES C)`
`4`	`4`
Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-cmake_minimum_required(VERSION 3.14...3.19)`
	`1`	`+cmake_minimum_required(VERSION 3.14...4.3)`
`2`	`2`
`3`	`3`	`project(hello-user VERSION 0.1.0)`
`4`	`4`
Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,4 @@`
	`1`	`+# Max stays <3.27: find_package(PythonExtensions) needs FindPythonInterp, removed in 3.27`
`1`	`2`	`cmake_minimum_required(VERSION 3.15...3.26)`
`2`	`3`
`3`	`4`	`project(hello)`