Add POSIX_SC_CHILD_MAX and POSIX_SC_CLK_TCK constants

Closes GH-12689

Author: bukka

NEWS

@@ -33,6 +33,9 @@ Phar:
   . Fixed bug GH-12532 (PharData created from zip has incorrect timestamp).
     (nielsdos)
 
+POSIX:
+  . Added POSIX_SC_CHILD_MAX and POSIX_SC_CLK_TCK constants. (Jakub Zelenka)
+
 SimpleXML:
   . Fixed bug GH-12192 (SimpleXML infinite loop when getName() is called
     within foreach). (nielsdos)

UPGRADING

@@ -108,6 +108,10 @@ PHP 8.4 UPGRADE NOTES
 - Phar:
   . Added support for the unix timestamp extension for zip archives.
 
+- POSIX:
+  . Added constant POSIX_SC_CHILD_MAX
+  . Added constant POSIX_SC_CLK_TCK
+
 - SOAP:
   . Added support for clark notation for namespaces in class map.
     It is now possible to specify entries in a class map with clark notation

ext/posix/posix.stub.php

@@ -198,6 +198,20 @@
  */
 const POSIX_SC_ARG_MAX = UNKNOWN;
 #endif
+#ifdef _SC_CHILD_MAX
+/**
+ * @var int
+ * @cvalue _SC_CHILD_MAX
+ */
+const POSIX_SC_CHILD_MAX = UNKNOWN;
+#endif
+#ifdef _SC_CLK_TCK
+/**
+ * @var int
+ * @cvalue _SC_CLK_TCK
+ */
+const POSIX_SC_CLK_TCK = UNKNOWN;
+#endif
 #ifdef _SC_PAGESIZE
 /**
  * @var int