X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=README.md;h=02b903a2e18ea9d533cc4cd31e0b6288a32cc3b6;hp=2b89ffa0af9f35469f7839568706829a20a6d3ac;hb=835b9ab3ca3777fe42e37e92096226ebd19ca75b;hpb=afb6113ffba9d494ec90d773aed3e83acd299473

diff --git a/README.md b/README.md
index 2b89ffa..02b903a 100644
--- a/README.md
+++ b/README.md
@@ -58,7 +58,7 @@ Tested on:
   - FreeBSD 8.2/8.3/9.0/9.1/10.0 i386/amd64
   - Solaris 10/11 i386
   - Cygwin i386/amd64
-  - MacOSX amd64
+  - MacOS amd64/arm64
 
 Should also work on:
 
@@ -91,16 +91,8 @@ supported, with the following exceptions:
 
 Clang version 3.0 (based on LLVM 3.0) is supported.
 
-Building on MacOS X (Darwin) requires a work-around for processor
-detection:
-
-  - 32-bit:
-
-        ./configure --build=i686-apple-darwin11
-
-  - 64-bit:
-
-        ./configure --build=x86_64-apple-darwin11
+Glibc >= 2.4 should work but the older version we test against is
+currently 2.17.
 
 For developers using the Git tree:
 
@@ -441,6 +433,33 @@ In addition to the usual `make check` target, Userspace RCU features
   - `make bench`: long (many hours) benchmarks.
 
 
+Known issues
+------------
+
+There is an application vs library compatibility issue between
+applications built using Userspace RCU 0.10 headers linked against
+Userspace RCU 0.11 or 0.12 shared objects. The problem occurs as
+follows:
+
+  - An application executable is built with _LGPL_SOURCE defined, includes
+    any of the Userspace RCU 0.10 urcu flavor headers, and is built
+    without the -fpic compiler option.
+
+  - The Userspace RCU 0.10 library shared objects are updated to 0.11
+    or 0.12 without rebuilding the application.
+
+  - The application will hang, typically when RCU grace period
+    (synchronize_rcu) is invoked.
+
+Some possible work-arounds for this are:
+
+  - Rebuild the application against Userspace RCU 0.11+.
+
+  - Rebuild the application with -fpic.
+
+  - Upgrade Userspace RCU to 0.13+ without installing 0.11 nor 0.12.
+
+
 Contacts
 --------