Merge branch 'PHP-8.3'

Author: petk

cmake/cmake/modules/PHP/CheckBuiltin.cmake

@@ -10,6 +10,13 @@ php_check_builtin(<builtin> <result_var>)
 If builtin `<builtin>` is supported by the C compiler, store the check result in
 the cache variable `<result_var>`.
 
+For example:
+
+```cmake
+include(PHP/CheckBuiltin)
+
+php_check_builtin(__builtin_clz PHP_HAVE_BUILTIN_CLZ)
+```
 #]=============================================================================]
 
 include_guard(GLOBAL)

cmake/cmake/modules/PHP/CheckCompilerFlag.cmake

@@ -30,6 +30,14 @@ Check that the <flag> is accepted by the <lang> compiler without issuing any
 diagnostic message. The result is stored in an internal cache entry named
 `<result_var>`. The language `<lang>` can be one of the supported languages by
 the CMake's `CheckCompilerFlag` module.
+
+For example:
+
+```cmake
+include(PHP/CheckCompilerFlag)
+
+php_check_compiler_flag(C -Wno-clobbered PHP_HAVE_WNO_CLOBBERED)
+```
 #]=============================================================================]
 
 include_guard(GLOBAL)

cmake/cmake/modules/PHP/SearchLibraries.cmake

@@ -77,6 +77,21 @@ of `<headers>`) and store the result in an internal cache variable
   checked elsewhere in the application using the `check_header_include()`. In
   most cases this won't be needed.
 
+For example:
+
+```cmake
+include(PHP/SearchLibraries)
+
+php_search_libraries(
+  dlopen
+  HAVE_LIBDL
+  HEADERS dlfcn.h
+  LIBRARIES
+    ${CMAKE_DL_LIBS}
+  TARGET php_configuration INTERFACE
+)
+```
+
 The following variables may be set before calling this function to modify the
 way the check is run. See
 https://cmake.org/cmake/help/latest/module/CheckSymbolExists.html