1 files changed, 4 insertions, 0 deletions
diff --git a/ANNOUNCE b/ANNOUNCE
index d8f35e032..3acc953b4 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -132,6 +132,10 @@ sha256sum < groff-1.23.0.tar.gz | cut -f1 -d\  | xxd -r -p | base64
 Caveats
 =======
 
+o GNU tools, or otherwise POSIX-conforming ones, are generally required
+  to build on Solaris 10 or 11.  See the "PROBLEMS" file in the
+  distribution archive.
+
 o A failure in automated testing occurs (if you run "make check") for
   gdiffmk if GNU diffutils 3.9 is used.  This is a known problem with
   that release; see <https://debbugs.gnu.org/db/61/61193.html>.