From 27a4852201a41e7d6f8098cc05b7b0949ebc6af4 Mon Sep 17 00:00:00 2001
From: Tristan Gingold <gingold@adacore.com>
Date: Sun, 22 Nov 2015 19:02:05 +0100
Subject: backtrace: add support for windows and for llvm (via libbacktrace).

---
 README | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'README')

diff --git a/README b/README
index 0354db12d..16bd9a78b 100644
--- a/README
+++ b/README
@@ -132,6 +132,13 @@ First configure ghdl and specify where llvm is installed
 $ ./configure --with-llvm=PREFIX
   where PREFIX/bin/llvm-config is present
 
+If you want to have stack backtraces on errors (like assert failure or
+index of out bounds), you need to configure and build libbacktrace from gcc
+(you don't need to configure gcc), and add to configure:
+  --with-backtrace-lib=/path-to-gcc-build/libbacktrace/.libs/libbacktrace.a
+
+Then build with 'make' and install with 'make install'.
+
 Notes for developpers
 *********************
 
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