From 84360c191f418bf8682b35e0c8235fcc3bd19a06 Mon Sep 17 00:00:00 2001
From: Peter Carbonetto
Date: Thu, 27 Jul 2017 13:30:08 -0500
Subject: Added note about GSL version in installation instructions.

---
 INSTALL.md | 2 +-
 README.md  | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/INSTALL.md b/INSTALL.md
index 05b0eb8..e60a25a 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -14,7 +14,7 @@ GEMMA runs on Linux and MAC OSX and the runtime has the following
 dependencies:
 
 * C++ tool chain
-* GNU Science library (GSL)
+* GNU Science library (GSL) 1.x (does not currently work with GSL >= 2).
 * blas
 * [Eigen library](http://eigen.tuxfamily.org/dox/)
 * zlib
diff --git a/README.md b/README.md
index b8779e5..9a51770 100644
--- a/README.md
+++ b/README.md
@@ -179,7 +179,9 @@ Autotools.*
 You will need a standard C/C++ compiler such as GNU gcc, as well as
 [GSL](http://www.gnu.org/s/gsl) and
 [LAPACK](http://www.netlib.org/lapack) libraries. You will need to
-change the library paths in the Makefile accordingly.
+change the library paths in the Makefile accordingly. *Note that GEMMA
+currently does not work with GSL 2.x. We recommend linking to the
+latest version of GSL 1.x, which is GSL 1.16 as of this writing.*
 
 *Revise this step:* You will need to download the
 [Eigen C++ library](http://eigen.tuxfamily.org), and copy the `Eigen`
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