X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=readme.md;h=fa9237cfc4bd42d490434dae09deed1e9d739c4f;hb=59cb651402874a22500cab3ec586565b48f76059;hp=565ce1126a54b312e4edda9d8a76dfc3ec83e9a9;hpb=e1c3a8744d3f78cac977b10f8f07532d3087dc4b;p=libcds.git

diff --git a/readme.md b/readme.md
index 565ce112..fa9237cf 100644
--- a/readme.md
+++ b/readme.md
@@ -2,11 +2,8 @@ CDS C++ library
 ===============
 [![GitHub version](https://badge.fury.io/gh/khizmax%2Flibcds.svg)](http://badge.fury.io/gh/khizmax%2Flibcds)
 [![License](https://img.shields.io/:license-bsd-blue.svg?style=round-square)](https://github.com/khizmax/libcds/blob/master/LICENSE)
-
-<!---
-The build time for lib and hdr-test is exceed the limit of 50 minutes
 [![Build Status](https://travis-ci.org/khizmax/libcds.svg?branch=dev)](https://travis-ci.org/khizmax/libcds)
--->
+
 <!---
 The coverity dataset is about 4G of size and about 1G in compressed state so it is a problem to upload it to the coverity server
 [![Coverity Scan Build Status](https://scan.coverity.com/projects/4445/badge.svg)](https://scan.coverity.com/projects/4445)
@@ -46,6 +43,16 @@ Evolution of libcds (Gource visualization by Landon Wilkins): https://www.youtub
    - *nix: [use CMake](build/cmake/readme.md)
    - Windows: use MS Visual C++ 2015 project
 
+Some parts of libcds may depend on DCAS (double-width compare-and-swap) atomic primitive if
+the target architecture supports it. For x86, cmake build script enables `-mcx16` compiler flag that
+switches DCAS support on. You may manually disable DCAS support with the following command line flags
+in GCC/clang (for MS VC++ compiler DCAS is not supported):
+  - `-DCDS_DISABLE_128BIT_ATOMIC` - for 64bit build
+  - `-DCDS_DISABLE_64BIT_ATOMIC` - for 32bit build
+
+**All your projects AND libcds MUST be compiled with the same flags - either with DCAS support or without it.**
+   
+   
 **Pull request requirements**
 - Pull-request to *master* branch will be unconditionally rejected
 - *integration* branch is intended for pull-request. Usually, *integration* branch is the same as *master*