Re: [dpdk-dev] [PATCH v3 6/7] doc: guide for Windows build using MinGW-w64

[William Tu <u9012063@gmail.com>]

On Mon, Feb 17, 2020 at 4:03 PM Dmitry Kozlyuk <dmitry.kozliuk@gmail.com> wrote:
>
> Instructions for different toolchains presented as options on the
> corresponging steps of the guide, so that common parts may be reused.
>
> Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
> ---
>  doc/guides/windows_gsg/build_dpdk.rst | 63 +++++++++++++++++++++++----
>  1 file changed, 54 insertions(+), 9 deletions(-)
>
> diff --git a/doc/guides/windows_gsg/build_dpdk.rst b/doc/guides/windows_gsg/build_dpdk.rst
> index 6711e07e2..c77384785 100644
> --- a/doc/guides/windows_gsg/build_dpdk.rst
> +++ b/doc/guides/windows_gsg/build_dpdk.rst
> @@ -7,15 +7,22 @@ Compiling the DPDK Target from Source
>  System Requirements
>  -------------------
>
> -The DPDK and its applications require the Clang-LLVM C compiler
> -and Microsoft MSVC linker.
> +Building the DPDK and its applications requires one of the following
> +environments:
> +
> +* The Clang-LLVM C compiler and Microsoft MSVC linker.
> +* The MinGW-w64 toolchain (either native or cross).
> +
>  The Meson Build system is used to prepare the sources for compilation
>  with the Ninja backend.
>  The installation of these tools is covered in this section.
>
>
> +Option 1. Clang-LLVM C Compiler and Microsoft MSVC Linker
> +---------------------------------------------------------
> +
>  Install the Compiler
> ---------------------
> +~~~~~~~~~~~~~~~~~~~~
>
>  Download and install the clang compiler from
>  `LLVM website <http://releases.llvm.org/download.html>`_.
> @@ -25,7 +32,7 @@ For example, Clang-LLVM direct download link::
>
>
>  Install the Linker
> -------------------
> +~~~~~~~~~~~~~~~~~~
>
>  Download and install the Build Tools for Visual Studio to link and build the
>  files on windows,
> @@ -34,6 +41,15 @@ When installing build tools, select the "Visual C++ build tools" option
>  and ensure the Windows SDK is selected.
>
>
> +Option 2. MinGW-w64 Toolchain
> +-----------------------------
> +
> +Obtain the latest version from
> +`MinGW-w64 website <http://mingw-w64.org/doku.php/download>`_.
> +On Windows, install to a folder without spaces in its name, like ``C:\MinGW``.
> +This path is assumed for the rest of this guide.
> +
> +
>  Install the Build System
>  ------------------------
>
> @@ -43,6 +59,12 @@ A good option to choose is the MSI installer for both meson and ninja together::
>
>         http://mesonbuild.com/Getting-meson.html#installing-meson-and-ninja-with-the-msi-installer%22
>
> +.. warning::
> +
> +    Meson 0.47.1 is recommended, Meson 0.52 is the latest version known
> +    to build DPDK successfully. Meson 0.53 has fatal issues with Clang
> +    that prevent both native and cross-compilation.
> +
>  Install the Backend
>  -------------------
>
> @@ -56,23 +78,41 @@ Build the code
>  The build environment is setup to build the EAL and the helloworld example by
>  default.
>
> -Using the ninja backend
> -~~~~~~~~~~~~~~~~~~~~~~~~
> +Option 1. Native Build on Windows
> +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> -Specifying the compiler might be required to complete the meson command.
> +When using Clang-LLVM, specifying the compiler might be required to complete
> +the meson command:
>
>  .. code-block:: console
>
>      set CC=clang
>
> +When using MinGW-w64, it is sufficient to have toolchain executables in PATH:
> +
> +.. code-block:: console
> +
> +    set PATH=C:\MinGW\mingw64\bin;%PATH%
> +
>  To compile the examples, the flag ``-Dexamples`` is required.
>
>  .. code-block:: console
>
>      cd C:\Users\me\dpdk
>      meson -Dexamples=helloworld build
> -    cd build
> -    ninja
> +    ninja -C build
> +
> +Option 2. Cross-Compile with MinGW-w64
> +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> +
> +The cross-file option must be specified for Meson.
> +Depending on the distribution, paths in this file may need adjustments.
> +
> +.. code-block:: console
> +
> +    meson --cross-file config/x86/meson_mingw.txt -Dexamples=helloworld build
> +    ninja -C build
> +
>
>  Run the helloworld example
>  ==========================
> @@ -87,3 +127,8 @@ Navigate to the examples in the build directory and run `dpdk-helloworld.exe`.
>      hello from core 3
>      hello from core 0
>      hello from core 2
> +
> +Note for MinGW-w64: applications are linked to ``libwinpthread-1.dll``
> +by default. To run the example, either add toolchain executables directory
> +to the PATH or copy the library to the working directory.
> +Alternatively, static linking may be used (mind the LGPLv2.1 license).
> --

btw, just share my experience.

Using mingw-w64 4.0.4 on ubuntu 1604 does not work due to
lib/librte_eal.a(librte_eal_common_eal_common_thread.c.obj):eal_common_thread.c:(.text+0x1f):
undefined reference to `EnterSynchronizationBarrier'
https://sourceforge.net/p/mingw-w64/bugs/562/

This is fixed in mingw-w64 5.0.3 ubuntu 1804.
William