X-Git-Url: http://plrg.eecs.uci.edu/git/?p=libcds.git;a=blobdiff_plain;f=readme.md;h=fa9237cfc4bd42d490434dae09deed1e9d739c4f;hp=54c6f15b6e71c596ce456e0dc75d492c7bd379b7;hb=48b2020bfe3a4effd945bea5193b5746388d2562;hpb=f3d39e46e726ffb4620f2a50898815ffc15b538c

diff --git a/readme.md b/readme.md
index 54c6f15b..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)
@@ -24,7 +21,7 @@ The library contains the implementations of the following containers:
   - several algo for lock-free queue, including classic Michael & Scott algorithm and its derivatives,
     the flat combining queue, the segmented queue.
   - several implementation of unordered set/map - lock-free and fine-grained lock-based
-  - [flat-combining] (http://mcg.cs.tau.ac.il/projects/projects/flat-combining) technique
+  - [flat-combining](http://mcg.cs.tau.ac.il/projects/projects/flat-combining) technique
   - lock-free [skip-list](http://en.wikipedia.org/wiki/Skip_list)
   - lock-free FeldmanHashMap/Set [Multi-Level Array Hash](http://samos-conference.com/Resources_Samos_Websites/Proceedings_Repository_SAMOS/2013/Files/2013-IC-20.pdf)
     with thread-safe bidirectional iterator support
@@ -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*