From: Dmitry Kozlyuk Date: Thu, 27 Feb 2020 04:25:34 +0000 (+0300) Subject: build: support MinGW-w64 with Meson X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=4816484bab8eeb05e83bcf4787772eb3b75fa6ee;p=dpdk.git build: support MinGW-w64 with Meson MinGW-w64 linker does not mimic MS linker options, so the build system must differentiate between linkers on Windows. Use GNU linker options with GCC and MS linker options with Clang. MinGW-w64 by default uses MSVCRT stdio, which does not comply to ANSI, most notably its formatting and string handling functions. MinGW-w64 support for the Universal CRT (UCRT) is ongoing, but the toolchain provides its own standard-complying implementation of stdio. The latter is used in the patch to support formatting in DPDK. Signed-off-by: Dmitry Kozlyuk Tested-by: William Tu Tested-by: Pallavi Kadam --- diff --git a/config/meson.build b/config/meson.build index d3d2370ce4..68aeb84703 100644 --- a/config/meson.build +++ b/config/meson.build @@ -14,6 +14,10 @@ foreach env:supported_exec_envs set_variable('is_' + env, exec_env == env) endforeach +# MS linker requires special treatment. +# TODO: use cc.get_linker_id() with Meson >= 0.54 +is_ms_linker = is_windows and (cc.get_id() == 'clang') + # set the major version, which might be used by drivers and libraries # depending on the configuration options pver = meson.project_version().split('.') @@ -247,6 +251,16 @@ if is_freebsd add_project_arguments('-D__BSD_VISIBLE', language: 'c') endif +if is_windows + # Minimum supported API is Windows 7. + add_project_arguments('-D_WIN32_WINNT=0x0601', language: 'c') + + # Use MinGW-w64 stdio, because DPDK assumes ANSI-compliant formatting. + if cc.get_id() == 'gcc' + add_project_arguments('-D__USE_MINGW_ANSI_STDIO', language: 'c') + endif +endif + if get_option('b_lto') if cc.has_argument('-ffat-lto-objects') add_project_arguments('-ffat-lto-objects', language: 'c') diff --git a/doc/guides/windows_gsg/build_dpdk.rst b/doc/guides/windows_gsg/build_dpdk.rst index 6711e07e21..a0e51dfcb3 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 `_. @@ -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 +41,18 @@ 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 `_. +On Windows, install to a folder without spaces in its name, like ``C:\MinGW``. +This path is assumed for the rest of this guide. + +Version 4.0.4 for Ubuntu 16.04 cannot be used due to a +`MinGW-w64 bug `_. + + Install the Build System ------------------------ @@ -43,6 +62,8 @@ 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 +Recommended version is either Meson 0.47.1 (baseline) or the latest release. + Install the Backend ------------------- @@ -56,23 +77,30 @@ 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 + Run the helloworld example ========================== @@ -87,3 +115,8 @@ 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). diff --git a/lib/meson.build b/lib/meson.build index 0af3efab29..9c3cc55d5e 100644 --- a/lib/meson.build +++ b/lib/meson.build @@ -148,12 +148,16 @@ foreach l:libraries command: [map_to_def_cmd, '@INPUT@', '@OUTPUT@'], input: version_map, output: 'rte_@0@_exports.def'.format(name)) - lk_deps = [version_map, def_file] - if is_windows + + if is_ms_linker lk_args = ['-Wl,/def:' + def_file.full_path(), '-Wl,/implib:lib\\' + implib] else lk_args = ['-Wl,--version-script=' + version_map] + endif + + lk_deps = [version_map, def_file] + if not is_windows # on unix systems check the output of the # experimental syms script, using it as a # dependency of the .so build