- [INSTALL.RHEL.md]
- [INSTALL.XenServer.md]
- [INSTALL.NetBSD.md]
+ - [INSTALL.Windows.md]
- [INSTALL.DPDK.md]
Build Requirements
analysis and thread-safety checks. For Ubuntu, there are
nightly built packages available on clang's website.
+ * MSVC 2013. See [INSTALL.Windows] for additional Windows build
+ instructions.
+
While OVS may be compatible with other compilers, optimal
support for atomic operations may be missing, making OVS very
slow (see lib/ovs-atomic.h).
`% ./configure CC=clang`
+To supply special flags to the C compiler, specify them as CFLAGS on
+the configure command line. If you want the default CFLAGS, which
+include "-g" to build debug symbols and "-O2" to enable optimizations,
+you must include them yourself. For example, to build with the
+default CFLAGS plus "-mssse3", you might run configure as follows:
+
+ `% ./configure CFLAGS="-g -O2 -mssse3"`
+
+Note that these CFLAGS are not applied when building the Linux
+kernel module. Custom CFLAGS for the kernel module are supplied
+using the EXTRA_CFLAGS variable when running make. So, for example:
+
+ `% make EXTRA_CFLAGS="-Wno-error=date-time"
+
To build the Linux kernel module, so that you can run the
kernel-based switch, pass the location of the kernel build
directory on --with-linux. For example, to build for a running
For improved warnings if you installed "sparse" (see "Prerequisites"),
add C=1 to the command line.
+ Some versions of Clang and ccache are not completely compatible.
+ If you see unusual warnings when you use both together, consider
+ disabling ccache for use with Clang.
+
2. Consider running the testsuite. Refer to "Running the Testsuite"
below, for instructions.