Merge branch 'master' into list_caster_pass_generator

.github/workflows/emscripten.yaml

@@ -5,6 +5,8 @@ on:
   pull_request:
     branches:
     - master
+    - stable
+    - v*
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -23,8 +25,6 @@ jobs:
     - uses: pypa/[email protected]
       env:
         PYODIDE_BUILD_EXPORTS: whole_archive
-        CFLAGS: -fexceptions
-        LDFLAGS: -fexceptions
       with:
         package-dir: tests
         only: cp312-pyodide_wasm32

.github/workflows/pip.yml

@@ -102,7 +102,7 @@ jobs:
     - uses: actions/download-artifact@v4
 
     - name: Generate artifact attestation for sdist and wheel
-      uses: actions/attest-build-provenance@210c1913531870065f03ce1f9440dd87bc0938cd # v1.4.0
+      uses: actions/attest-build-provenance@310b0a4a3b0b78ef57ecda988ee04b132db73ef8 # v1.4.1
       with:
         subject-path: "*/pybind11*"
 

docs/changelog.rst

@@ -15,6 +15,64 @@ IN DEVELOPMENT
 
 Changes will be summarized here periodically.
 
+New Features:
+
+* Support for Python 3.7 was removed. (Official end-of-life: 2023-06-27).
+  `#5191 <https://github.com/pybind/pybind11/pull/5191>`_
+
+Support for CMake older than 3.15 and some older compilers will also be removed.
+
+Version 2.13.2 (August 13, 2024)
+--------------------------------
+
+New Features:
+
+* A ``pybind11::detail::type_caster_std_function_specializations`` feature was added, to support specializations for
+  ``std::function``'s with return types that require custom to-Python conversion behavior (to primary use case is to catch and
+  convert exceptions).
+  `#4597 <https://github.com/pybind/pybind11/pull/4597>`_
+
+
+Changes:
+
+
+* Use ``PyMutex`` instead of ``std::mutex`` for internal locking in the free-threaded build.
+  `#5219 <https://github.com/pybind/pybind11/pull/5219>`_
+
+* Add a special type annotation for C++ empty tuple.
+  `#5214 <https://github.com/pybind/pybind11/pull/5214>`_
+
+* When compiling for WebAssembly, add the required exception flags (CMake 3.13+).
+  `#5298 <https://github.com/pybind/pybind11/pull/5298>`_
+
+Bug fixes:
+
+* Make ``gil_safe_call_once_and_store`` thread-safe in free-threaded CPython.
+  `#5246 <https://github.com/pybind/pybind11/pull/5246>`_
+
+* A missing ``#include <algorithm>`` in pybind11/typing.h was added to fix build errors (in case user code does not already depend
+  on that include).
+  `#5208 <https://github.com/pybind/pybind11/pull/5208>`_
+
+* Fix regression introduced in #5201 for GCC<10.3 in C++20 mode.
+  `#5205 <https://github.com/pybind/pybind11/pull/5205>`_
+
+
+.. fix(cmake)
+
+* Remove extra = when assigning flto value in the case for Clang in CMake.
+  `#5207 <https://github.com/pybind/pybind11/pull/5207>`_
+
+
+Tests:
+
+* Adding WASM testing to our CI (Pyodide / Emscripten via scikit-build-core).
+  `#4745 <https://github.com/pybind/pybind11/pull/4745>`_
+
+* clang-tidy (in GitHub Actions) was updated from clang 15 to clang 18.
+  `#5272 <https://github.com/pybind/pybind11/pull/5272>`_
+
+
 Version 2.13.1 (June 26, 2024)
 ------------------------------
 

tests/pyproject.toml

@@ -10,6 +10,10 @@ name = "pybind11_tests"
 version = "0.0.1"
 dependencies = ["pytest", "pytest-timeout", "numpy", "scipy"]
 
+[tool.scikit-build]
+# Hide a warning while we also support CMake < 3.15
+cmake.version = ">=3.15"
+
 [tool.scikit-build.cmake.define]
 PYBIND11_FINDPYTHON = true
 

tools/pybind11Common.cmake

@@ -2,7 +2,7 @@
 
 Adds the following targets::
 
-    pybind11::pybind11 - link to headers and pybind11
+    pybind11::pybind11 - link to Python headers and pybind11::headers
     pybind11::module - Adds module links
     pybind11::embed - Adds embed links
     pybind11::lto - Link time optimizations (only if CMAKE_INTERPROCEDURAL_OPTIMIZATION is not set)
@@ -75,6 +75,32 @@ set_property(
   APPEND
   PROPERTY INTERFACE_LINK_LIBRARIES pybind11::pybind11)
 
+# -------------- emscripten requires exceptions enabled -------------
+# _pybind11_no_exceptions is a private mechanism to disable this addition.
+# Please open an issue if you need to use it; it will be removed if no one
+# needs it.
+if(CMAKE_SYSTEM_NAME MATCHES Emscripten AND NOT _pybind11_no_exceptions)
+  if(CMAKE_VERSION VERSION_LESS 3.13)
+    message(WARNING "CMake 3.13+ is required to build for Emscripten. Some flags will be missing")
+  else()
+    if(_is_config)
+      set(_tmp_config_target pybind11::pybind11_headers)
+    else()
+      set(_tmp_config_target pybind11_headers)
+    endif()
+
+    set_property(
+      TARGET ${_tmp_config_target}
+      APPEND
+      PROPERTY INTERFACE_LINK_OPTIONS -fexceptions)
+    set_property(
+      TARGET ${_tmp_config_target}
+      APPEND
+      PROPERTY INTERFACE_COMPILE_OPTIONS -fexceptions)
+    unset(_tmp_config_target)
+  endif()
+endif()
+
 # --------------------------- link helper ---------------------------
 
 add_library(pybind11::python_link_helper IMPORTED INTERFACE ${optional_global})
@@ -329,7 +355,7 @@ function(_pybind11_generate_lto target prefer_thin_lto)
 
     if(CMAKE_SYSTEM_PROCESSOR MATCHES "ppc64le" OR CMAKE_SYSTEM_PROCESSOR MATCHES "mips64")
       # Do nothing
-    elseif(CMAKE_SYSTEM_PROCESSOR MATCHES emscripten)
+    elseif(CMAKE_SYSTEM_NAME MATCHES Emscripten)
       # This compile is very costly when cross-compiling, so set this without checking
       set(PYBIND11_LTO_CXX_FLAGS "-flto${thin}${cxx_append}")
       set(PYBIND11_LTO_LINKER_FLAGS "-flto${thin}${linker_append}")

tools/pybind11Config.cmake.in

@@ -84,7 +84,7 @@ you can either use the basic targets, or use the FindPython tools:
 
   # Python method:
   Python_add_library(MyModule2 src2.cpp)
-  target_link_libraries(MyModule2 pybind11::headers)
+  target_link_libraries(MyModule2 PUBLIC pybind11::headers)
   set_target_properties(MyModule2 PROPERTIES
                                   INTERPROCEDURAL_OPTIMIZATION ON
                                   CXX_VISIBILITY_PRESET ON