ae2f2fee24
Rename the cross files for meson compilation from having linuxapp in the name to just linux in the name. Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
207 lines
7.7 KiB
Plaintext
207 lines
7.7 KiB
Plaintext
INSTALLING DPDK USING THE MESON BUILD SYSTEM
|
|
---------------------------------------------
|
|
|
|
Summary
|
|
--------
|
|
For many platforms, compiling and installing DPDK should work using the
|
|
following set of commands::
|
|
|
|
meson build
|
|
cd build
|
|
ninja
|
|
ninja install
|
|
|
|
This will compile DPDK in the ``build`` subdirectory, and then install the
|
|
resulting libraries, drivers and header files onto the system - generally
|
|
in /usr/local. A package-config file, ``libdpdk.pc``, for DPDK will also
|
|
be installed to allow ease of compiling and linking with applications.
|
|
|
|
After installation, to use DPDK, the necessary CFLAG and LDFLAG variables
|
|
can be got from pkg-config::
|
|
|
|
pkg-config --cflags libdpdk
|
|
pkg-config --libs libdpdk
|
|
|
|
More detail on each of these steps can be got from the following sections.
|
|
|
|
|
|
Getting the Tools
|
|
------------------
|
|
|
|
The ``meson`` tool is used to configure a DPDK build. On most Linux
|
|
distributions this can be got using the local package management system,
|
|
e.g. ``dnf install meson`` or ``apt-get install meson``. If meson is not
|
|
available as a suitable package, it can also be installed using the Python
|
|
3 ``pip`` tool, e.g. ``pip3 install meson``. Version 0.42 of meson is
|
|
recommended - if the version packaged is too old, the latest version is
|
|
generally available from "pip".
|
|
|
|
The other dependency for building is the ``ninja`` tool, which acts similar
|
|
to make and performs the actual build using information provided by meson.
|
|
Installing meson will, in many cases, also install ninja, but, if not
|
|
already installed, it too is generally packaged by most Linux distributions.
|
|
If not available as a package, it can be downloaded as source or binary from
|
|
https://ninja-build.org/
|
|
|
|
|
|
Configuring the Build
|
|
----------------------
|
|
|
|
To configure a build, run the meson tool, passing the path to the directory
|
|
to be used for the build e.g. ``meson build``, as shown above. If calling
|
|
meson from somewhere other than the root directory of the DPDK project the
|
|
path to the root directory should be passed as the first parameter, and the
|
|
build path as the second. For example, to build DPDK in /tmp/dpdk-build::
|
|
|
|
user@host:/tmp$ meson ~user/dpdk dpdk-build
|
|
|
|
Meson will then configure the build based on settings in the project's
|
|
meson.build files, and by checking the build environment for e.g. compiler
|
|
properties or the presence of dependencies, such as libpcap, or openssl
|
|
libcrypto libraries. Once done, meson writes a ``build.ninja`` file in the
|
|
build directory to be used to do the build itself when ninja is called.
|
|
|
|
Tuning of the build is possible, both as part of the original meson call,
|
|
or subsequently using ``meson configure`` command (``mesonconf`` in some
|
|
older versions). Some options, such as ``buildtype``, or ``werror`` are
|
|
built into meson, while others, such as ``max_lcores``, or the list of
|
|
examples to build, are DPDK-specific. To have a list of all options
|
|
available run ``meson configure`` in the build directory.
|
|
|
|
Examples of adjusting the defaults when doing initial meson configuration.
|
|
Project-specific options are passed used -Doption=value::
|
|
|
|
meson --werror werrorbuild # build with warnings as errors
|
|
|
|
meson --buildtype=debug debugbuild # build for debugging
|
|
|
|
meson -Dexamples=l3fwd,l2fwd fwdbuild # build some examples as
|
|
# part of the normal DPDK build
|
|
|
|
meson -Dmax_lcores=8 smallbuild # scale build for smaller systems
|
|
|
|
meson -Denable_docs=true fullbuild # build and install docs
|
|
|
|
Examples of setting the same options using meson configure::
|
|
|
|
meson configure -Dwerror=true
|
|
|
|
meson configure -Dbuildtype=debug
|
|
|
|
meson configure -Dexamples=l3fwd,l2fwd
|
|
|
|
meson configure -Dmax_lcores=8
|
|
|
|
NOTE: once meson has been run to configure a build in a directory, it
|
|
cannot be run again on the same directory. Instead ``meson configure``
|
|
should be used to change the build settings within the directory, and when
|
|
``ninja`` is called to do the build itself, it will trigger the necessary
|
|
re-scan from meson.
|
|
|
|
As well as those settings taken from ``meson configure``, other options
|
|
such as the compiler to use can be passed via environment variables. For
|
|
example::
|
|
|
|
CC=clang meson clang-build
|
|
|
|
NOTE: for more comprehensive overriding of compilers or other environment
|
|
settings, the tools for cross-compilation may be considered. However, for
|
|
basic overriding of the compiler etc., the above form works as expected.
|
|
|
|
|
|
Performing the Build
|
|
---------------------
|
|
|
|
Use ``ninja`` to perform the actual build inside the build folder
|
|
previously configured. In most cases no arguments are necessary.
|
|
|
|
Ninja accepts a number of flags which are similar to make. For example, to
|
|
call ninja from outside the build folder, you can use ``ninja -C build``.
|
|
Ninja also runs parallel builds by default, but you can limit this using
|
|
the ``-j`` flag, e.g. ``ninja -j1 -v`` to do the build one step at a time,
|
|
printing each command on a new line as it runs.
|
|
|
|
|
|
Installing the Compiled Files
|
|
------------------------------
|
|
|
|
Use ``ninja install`` to install the required DPDK files onto the system.
|
|
The install prefix defaults to ``/usr/local`` but can be used as with other
|
|
options above. The environment variable ``DESTDIR`` can be used to adjust
|
|
the root directory for the install, for example when packaging.
|
|
|
|
With the base install directory, the individual directories for libraries
|
|
and headers are configurable. By default, the following will be the
|
|
installed layout::
|
|
|
|
headers -> /usr/local/include
|
|
libraries -> /usr/local/lib64
|
|
drivers -> /usr/local/lib64/dpdk/drivers
|
|
libdpdk.pc -> /usr/local/lib64/pkgconfig
|
|
|
|
For the drivers, these will also be symbolically linked into the library
|
|
install directory, so that ld.so can find them in cases where one driver may
|
|
depend on another, e.g. a NIC PMD depending upon the PCI bus driver. Within
|
|
the EAL, the default search path for drivers will be set to the configured
|
|
driver install path, so dynamically-linked applications can be run without
|
|
having to pass in ``-d /path/to/driver`` options for standard drivers.
|
|
|
|
|
|
Cross Compiling DPDK
|
|
--------------------
|
|
|
|
To cross-compile DPDK on a desired target machine we can use the following
|
|
command::
|
|
|
|
meson cross-build --cross-file <target_machine_configuration>
|
|
|
|
For example if the target machine is arm64 we can use the following
|
|
command::
|
|
meson arm-build --cross-file config/arm/arm64_armv8_linux_gcc
|
|
|
|
where config/arm/arm64_armv8_linux_gcc contains the following
|
|
parameters::
|
|
|
|
[binaries]
|
|
c = 'aarch64-linux-gnu-gcc'
|
|
cpp = 'aarch64-linux-gnu-cpp'
|
|
ar = 'aarch64-linux-gnu-ar'
|
|
|
|
[host_machine]
|
|
system = 'linux'
|
|
cpu_family = 'aarch64'
|
|
cpu = 'armv8-a'
|
|
endian = 'little'
|
|
|
|
|
|
Using the DPDK within an Application
|
|
-------------------------------------
|
|
|
|
To compile and link against DPDK within an application, pkg-config should
|
|
be used to query the correct parameters. Examples of this are given in the
|
|
makefiles for the example applications included with DPDK. They demonstrate
|
|
how to link either against the DPDK shared libraries, or against the static
|
|
versions of the same.
|
|
|
|
From examples/helloworld/Makefile::
|
|
|
|
PC_FILE := $(shell pkg-config --path libdpdk)
|
|
CFLAGS += -O3 $(shell pkg-config --cflags libdpdk)
|
|
LDFLAGS_SHARED = $(shell pkg-config --libs libdpdk)
|
|
LDFLAGS_STATIC = -Wl,-Bstatic $(shell pkg-config --static --libs libdpdk)
|
|
|
|
build/$(APP)-shared: $(SRCS-y) Makefile $(PC_FILE) | build
|
|
$(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_SHARED)
|
|
|
|
build/$(APP)-static: $(SRCS-y) Makefile $(PC_FILE) | build
|
|
$(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_STATIC)
|
|
|
|
build:
|
|
@mkdir -p $@
|
|
|
|
NOTE: for --static builds, DPDK needs to be built with Meson >= 0.46 in order to
|
|
fully generate the list of private dependencies. If DPDK is built with an older
|
|
version of Meson, it might be necessary to manually specify dependencies of DPDK
|
|
PMDs/libraries, for example -lmlx5 -lmnl for librte-pmd-mlx5, or the static link
|
|
step might fail.
|