- GNU make.
- - The GNU C compiler. We generally test with version 4.1, 4.2, or
- 4.3.
+ - A C compiler, such as:
+
+ * GCC 4.x.
+
+ * Clang. Clang 3.4 and later provide useful static semantic
+ analysis and thread-safety checks. For Ubuntu, there are
+ nightly built packages available on clang's website.
- libssl, from OpenSSL, is optional but recommended if you plan to
connect the Open vSwitch to an OpenFlow controller. libssl is
libssl is installed, then Open vSwitch will automatically build
with support for it.
- - clang, from LLVM, is optional. It provides useful static semantic
- analyzer and thread-safety check. clang version must be 3.4 or
- later. For Ubuntu, there are nightly built packages available on
- clang's website.
-
To compile the kernel module on Linux, you must also install the
following. If you cannot build or install the kernel module, you may
use the userspace-only implementation, at a cost in performance. The
- Perl. Version 5.10.1 is known to work. Earlier versions should
also work.
-If you modify the vswitchd database schema, then the E-R diagram in
-the ovs-vswitchd.conf.db(5) manpage will be updated properly only if
-you have the following:
+The ovs-vswitchd.conf.db(5) manpage will include an E-R diagram, in
+formats other than plain text, only if you have the following:
- "dot" from graphviz (http://www.graphviz.org/).