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@@ -42,6 +42,12 @@ Version 2.23
 * Optimized string, wcsmbs and memory functions for IBM z13.
   Implemented by Stefan Liebler.
 
+* Newly linked programs that define a variable called signgam will no longer
+  have it set by the lgamma, lgammaf and lgammal functions.  Programs that
+  require signgam to be set by those functions must ensure that they use the
+  variable provided by the GNU C Library and declared in <math.h>, without
+  defining their own copy.
+
 * The minimum GCC version that can be used to build this version of the GNU
   C Library is GCC 4.7.  Older GCC versions, and non-GNU compilers, can
   still be used to compile programs using the GNU C Library.