From bfe6c4d35c898d4d4805dcf570dc1fc19a2568c9 Mon Sep 17 00:00:00 2001
From: Karel Miko <karel.miko@gmail.com>
Date: Wed, 12 Jul 2017 23:15:26 +0200
Subject: [PATCH] improved README - building instructions

[skip ci]
---
 README.md | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/README.md b/README.md
index 1cf505b..2f30df2 100644
--- a/README.md
+++ b/README.md
@@ -24,3 +24,21 @@ Please be aware, that all branches besides _master_ and _develop_ __can__ and __
 
 If you want to rely on such an _unstable_ branch, create your own fork of this repository to make sure nothing breaks for you.
 
+Building
+--------
+
+If you have `libtommath` installed on your system:
+
+    make CFLAGS="-DUSE_LTM -DLTM_DESC" EXTRALIBS="-ltommath" all
+
+For building a shared library use:
+
+    make -f makefile.shared CFLAGS="-DUSE_LTM -DLTM_DESC" EXTRALIBS="-ltommath" all
+
+If you have `libtommath` in a non-standard location:
+
+    make CFLAGS="-DUSE_LTM -DLTM_DESC -I/opt/devel/ltm" EXTRALIBS="/opt/devel/ltm/libtommath.a" all
+
+On unusual UNIX platforms, or if you do not have GNU make, have a look at `makefile.unix`.
+
+On MS Windows try `libtomcrypt_VS2008.sln` (Visual Studio) or `makefile.mingw` or `makefile.msvc`.