update README: drop up until clang 3.4 restriction
@@ -16,18 +16,17 @@ PREREQUISITES
A Linux distribution. Pluto has been tested on x86 and x86-64 machines
running Fedora, Ubuntu, and RedHat Enterprise Server. Solaris should also
be fine if you have GNU utilities. In order to use the development version
-from Pluto's git repository, automatic build system tools including
-autoconf, automake, and libtool are needed. LLVM/Clang 3.4 is needed for
-the pet submodule. GMP (GNU multi precision arithmetic library) is
-needed by ISL (one of the included libraries). If it's not already on
-your system, it can be installed easily with, for eg., 'sudo yum -y
-install gmp gmp-devel' on a Fedora ('sudo apt-get install libgmp3-dev'
-or something similar on an Ubuntu). It is also recommended astyle and
-indent be installed if a user wishes to browse through generated code.
-
-Pluto includes all polyhedral libraries that it depends on. The pet
-submodule included in Pluto will only work with LLVM/Clang versions up
-until 3.4. See pet/README for pet's pre-requisites.
+from Pluto's git repository, automatic build system tools including autoconf,
+automake, and libtool are needed. LLVM/Clang (2.9 or higher) is needed for the
+pet submodule. GMP (GNU multi precision arithmetic library) is needed by ISL
+(one of the included libraries). If it's not already on your system, it can be
+installed easily with, for eg., 'sudo yum -y install gmp gmp-devel' on a Fedora
+('sudo apt-get install libgmp3-dev' or something similar on an Ubuntu). It is
+also recommended astyle and indent be installed if a user wishes to browse
+through generated code.
+
+Pluto includes all polyhedral libraries that it depends on. See pet/README for
+pet's pre-requisites.
BUILDING PLUTO
