Index: Modules/_multiprocessing/multiprocessing.h
===================================================================
--- Modules/_multiprocessing/multiprocessing.h	(revision 66181)
+++ Modules/_multiprocessing/multiprocessing.h	(working copy)
@@ -37,6 +37,17 @@
 #endif
 
 /*
+ * Issue 3110 - Solaris does not define SEM_VALUE_MAX
+ */
+#ifndef SEM_VALUE_MAX
+#  ifdef _SEM_VALUE_MAX
+#    define SEM_VALUE_MAX _SEM_VALUE_MAX
+#  else
+#    define SEM_VALUE_MAX INT_MAX
+#  endif
+#endif
+
+/*
  * Make sure Py_ssize_t available
  */