Version 2.5.7

[lttng-ust.git] / README

diff --git a/README b/README
index 4b3053c84d523eaa5b45eca2941d8f7e8206b239..1d731ab76c4d8d8ab1fe787f12d51d4adda7bc8a 100644 (file)
--- a/README
+++ b/README
@@ -21,7 +21,7 @@ PREREQUISITES:
       * Website:  http://lttng.org/urcu
       * Releases: http://lttng.org/files/urcu
       * GitWeb:   http://lttng.org/cgi-bin/gitweb.cgi?p=userspace-rcu.git;a=summary
-      * Git:      git://lttng.org/userspace-rcu.git
+      * Git:      git://git.urcu.so/userspace-rcu.git
 
 For developers using the git tree:
 
@@ -52,6 +52,13 @@ INSTALLATION INSTRUCTIONS:
   If compiling from the git repository, run ./bootstrap before running
   the configure script, to generate it.
 
+  Note that configure sets '/usr/local' as the default prefix for files it
+  installs. However, this path is not part of most distributions' default
+  library path which will cause builds depending on liblttng-ust to fail unless
+  '-L/usr/local/lib' is added to LDFLAGS. You may provide a custom prefix to
+  configure by using the --prefix switch. Note that LTTng-UST needs to
+  be a shared library, even if the tracepoint probe provider is statically
+  linked into the application.
 
 USAGE:
 
@@ -105,9 +112,9 @@ USAGE:
     object.
   - Enable instrumentation and control tracing with the "lttng" command
     from lttng-tools. See lttng-tools doc/quickstart.txt.
-  - Note for C++ support: although an application instrumented with
-    tracepoints can be compiled with g++, tracepoint probes should be
-    compiled with gcc (only tested with gcc so far).
+  - Note for C++ support: since LTTng-UST 2.3, both tracepoints and
+    tracepoint probes can be compiled in C++. To compile tracepoint probes
+    in C++, you need g++ >= 4.7 or Clang.
 
 
 ENVIRONMENT VARIABLES: