common/mlx5: add Windows meson file

File drivers/common/mlx5/windows/meson.build is added to enable mlx5
source files compilation under common windows directory.
A Devx SDK tool must be installed to export two external H files:
mlx5devx.h and mlx5_ifc_devx.h. The installation is based on environment
variable DEVX_INC_PATH. In addition a DLL lib file is installed based on
environment variable DEVX_LIB_PATH. The meson file is using the
environment variables for compilation and linkage.

Signed-off-by: Tal Shnaiderman <talshn@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>

drivers/common/mlx5/windows/meson.build

@@ -0,0 +1,40 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2019 Mellanox Technologies, Ltd
+
+includes += include_directories('.')
+
+sources += files(
+	'mlx5_glue.c',
+)
+
+res_lib = run_command(python3, '-c', 'import os; print(os.environ["DEVX_LIB_PATH"])')
+res_inc = run_command(python3, '-c', 'import os; print(os.environ["DEVX_INC_PATH"])')
+
+if (res_lib.returncode() != 0 or res_inc.returncode() != 0)
+	build = false
+	reason = 'DevX environment variables are not set, DEVX_LIB_PATH and DEVX_INC_PATH vars must be exported'
+	subdir_done()
+endif
+
+devx_lib_dir = res_lib.stdout().strip()
+devx_inc_dir = res_inc.stdout().strip()
+
+ext_deps += cc.find_library('mlx5devx', dirs: devx_lib_dir, required: true)
+includes += include_directories(devx_inc_dir)
+cflags_options = [
+	'-std=c11',
+	'-Wno-strict-prototypes',
+	'-D_BSD_SOURCE',
+	'-D_DEFAULT_SOURCE',
+	'-D_XOPEN_SOURCE=600'
+]
+foreach option:cflags_options
+	if cc.has_argument(option)
+		cflags += option
+	endif
+endforeach
+if get_option('buildtype').contains('debug')
+	cflags += [ '-pedantic', '-DPEDANTIC' ]
+else
+	cflags += [ '-UPEDANTIC' ]
+endif