[ci skip] Document GC_C() → zend_gc_get_status()

diff --git a/UPGRADING.INTERNALS b/UPGRADING.INTERNALS
index d110589b02529fa6c656c71fecd383074702ccb2..99d2250d1ae4009b9cf300654a1a8f1cde1e18b0 100644 (file)
--- a/UPGRADING.INTERNALS
+++ b/UPGRADING.INTERNALS
@@ -21,6 +21,7 @@ PHP 7.3 INTERNALS UPGRADE NOTES
   r. php_url
   s. zend_function.reserved[]
   t. zif_handler
+  u. GC_G
 
 2. Build system changes
   a. Unix build system changes
@@ -138,6 +139,9 @@ PHP 7.3 INTERNALS UPGRADE NOTES
  t. For internal functions the typedef zif_handler has been introduced.  It is
     recommended to use this from now on, instead of defining own handler types.
 
+ u. The GC globals (GC_G) are now private. Use the new zend_gc_get_status() to
+    retrieve status information of the GC.
+
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 2. Build system changes
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