Add Chromium-only Blender WebEngine parity work

blender-5.2.0/build_files/cmake/have_features.cmake

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+# SPDX-FileCopyrightText: 2022 Blender Authors
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+# This file is used to test the system for headers & symbols.
+# Variables should use the `HAVE_` prefix.
+# Defines should use the same name as the CMAKE variable.
+
+include(CheckSymbolExists)
+
+# Used for: `intern/guardedalloc/intern/mallocn_intern.hh`.
+# Function `malloc_stats` is only available on GLIBC,
+# so check that before defining `HAVE_MALLOC_STATS`.
+check_symbol_exists(malloc_stats "malloc.h" HAVE_MALLOC_STATS_H)
+
+# Used for: `source/creator/creator_signals.c`.
+# The function `feenableexcept` is not present non-GLIBC systems,
+# hence we need to check if it's available in the `fenv.h` file.
+if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+  check_symbol_exists(feenableexcept "fenv.h" HAVE_FEENABLEEXCEPT)
+endif()
+if(NOT DEFINED HAVE_FEENABLEEXCEPT)
+  set(HAVE_FEENABLEEXCEPT 0)
+endif()
+
+# Used for: `source/blender/blenlib/intern/system.c`.
+# `execinfo` is not available on non-GLIBC systems (at least not on MUSL-LIBC),
+# so check the presence of the header before including it and using it for back-trace.
+if(NOT MSVC)
+  include(CheckIncludeFiles)
+  check_include_files("execinfo.h" HAVE_EXECINFO_H)
+  if(HAVE_EXECINFO_H)
+    add_definitions(-DHAVE_EXECINFO_H)
+  endif()
+endif()
+if(NOT DEFINED HAVE_EXECINFO_H)
+  set(HAVE_EXECINFO_H 0)
+endif()