[pybind11] Fixed compiling errors for pybind11 `-Wmissing-field-initi…

…alizers` under gcc8 and python312 (PaddlePaddle#63949)

cmake/external/pybind11.cmake

@@ -22,6 +22,23 @@ set(SOURCE_INCLUDE_DIR ${SOURCE_DIR}/include)
 
 include_directories(${PYBIND_INCLUDE_DIR})
 
+# It can be safely removed in gcc9.1+
+set(PYBIND_PATCH_COMMAND "")
+if(LINUX
+   AND (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+   AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 9)
+  set(PYBIND_TAG v2.12.0)
+  file(TO_NATIVE_PATH
+       ${PADDLE_SOURCE_DIR}/patches/pybind/detail/internals.h.patch native_dst)
+  # Note: [Why calling some `git` commands before `patch`?]
+  # Paddle's CI uses cache to accelerate the make process. However, error might raise when patch codes in two scenarios:
+  # 1. Patch to the wrong version: the tag version of CI's cache falls behind PYBIND_TAG, use `git checkout ${PYBIND_TAG}` to solve this.
+  # 2. Patch twice: the tag version of cache == PYBIND_TAG, but patch has already applied to cache.
+  set(PYBIND_PATCH_COMMAND
+      git checkout -- . && git checkout ${PYBIND_TAG} && patch -Nd
+      ${SOURCE_INCLUDE_DIR}/pybind11/detail < ${native_dst})
+endif()
+
 ExternalProject_Add(
   extern_pybind
   ${EXTERNAL_PROJECT_LOG_ARGS} ${SHALLOW_CLONE}
@@ -33,6 +50,7 @@ ExternalProject_Add(
   # third-party library version changes cannot be incorporated.
   # reference: https://cmake.org/cmake/help/latest/module/ExternalProject.html
   UPDATE_COMMAND ""
+  PATCH_COMMAND ${PYBIND_PATCH_COMMAND}
   CONFIGURE_COMMAND ""
   # I intentionally preserved an extern_pybind/include/pybind11 directory
   # to site-packages, so that you could discern that you intended to

patches/pybind/detail/internals.h.patch

@@ -0,0 +1,22 @@
+diff --git a/include/pybind11/detail/internals.h b/include/pybind11/detail/internals.h
+index c1047e4a..e09a6495 100644
+--- a/include/pybind11/detail/internals.h
++++ b/include/pybind11/detail/internals.h
+@@ -193,11 +193,18 @@ struct internals {
+     PyTypeObject *default_metaclass;
+     PyObject *instance_base;
+ #if defined(WITH_THREAD)
++#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ <= 8
++#pragma GCC diagnostic push
++#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
++#endif
+     // Unused if PYBIND11_SIMPLE_GIL_MANAGEMENT is defined:
+     PYBIND11_TLS_KEY_INIT(tstate)
+ #    if PYBIND11_INTERNALS_VERSION > 4
+     PYBIND11_TLS_KEY_INIT(loader_life_support_tls_key)
+ #    endif // PYBIND11_INTERNALS_VERSION > 4
++#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ <= 8
++#pragma GCC diagnostic pop
++#endif
+     // Unused if PYBIND11_SIMPLE_GIL_MANAGEMENT is defined:
+     PyInterpreterState *istate = nullptr;