Configure languages in the top-level CMakeLists.txt

On some platforms, enabling languages in a subproject or via
FetchContent module, doesn't work ok, so these must be (for now, at
least) enabled (also) in the top-level CMakeLists.txt.

Author: petk

CMakeLists.txt

@@ -72,9 +72,31 @@ project(
   VERSION 8.3
   DESCRIPTION "CMake-based PHP build system"
   HOMEPAGE_URL "https://github.com/petk/php-build-system"
-  LANGUAGES NONE
+  LANGUAGES C
 )
 
+################################################################################
+# Configure languages.
+################################################################################
+
+# Optionally enable C++ language for PHP extensions.
+include(CheckLanguage)
+check_language(CXX)
+if(CMAKE_CXX_COMPILER)
+  enable_language(CXX)
+endif()
+
+# Enable Assembly language dialect.
+if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
+  if(CMAKE_SYSTEM_PROCESSOR MATCHES "^ARM")
+    enable_language(ASM_MARMASM)
+  else()
+    enable_language(ASM_MASM)
+  endif()
+else()
+  enable_language(ASM)
+endif()
+
 # Configuration.
 block(PROPAGATE phpUrl)
   set(