igb_uio: build with meson

Support building igb_uio using meson and ninja. For this, we still use the
kernel's kbuild system, by calling out to make, since it's safer and easier
than trying to reproduce that in meson. A list of suitable file
dependencies is given so that we have a reasonable chance of a rebuild when
necessary.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Reviewed-by: Harry van Haaren <harry.van.haaren@intel.com>
Acked-by: Keith Wiles <keith.wiles@intel.com>
Acked-by: Luca Boccassi <luca.boccassi@gmail.com>

diff --git a/lib/librte_eal/linuxapp/igb_uio/Kbuild b/lib/librte_eal/linuxapp/igb_uio/Kbuild
new file mode 100644 (file)
index 0000000..98c98fe
--- /dev/null
+++ b/lib/librte_eal/linuxapp/igb_uio/Kbuild
@@ -0,0 +1 @@
+obj-m := igb_uio.o

diff --git a/lib/librte_eal/linuxapp/igb_uio/meson.build b/lib/librte_eal/linuxapp/igb_uio/meson.build
new file mode 100644 (file)
index 0000000..4712756
--- /dev/null
+++ b/lib/librte_eal/linuxapp/igb_uio/meson.build
@@ -0,0 +1,46 @@
+#   BSD LICENSE
+#
+#   Copyright(c) 2017 Intel Corporation.
+#   All rights reserved.
+#
+#   Redistribution and use in source and binary forms, with or without
+#   modification, are permitted provided that the following conditions
+#   are met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in
+#       the documentation and/or other materials provided with the
+#       distribution.
+#     * Neither the name of Intel Corporation nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+mkfile = custom_target('igb_uio_makefile',
+       output: 'Makefile',
+       command: ['touch', '@OUTPUT@'])
+
+custom_target('igb_uio',
+       input: ['igb_uio.c', 'Kbuild'],
+       output: 'igb_uio.ko',
+       command: ['make', '-C', kernel_dir,
+               'M=' + meson.current_build_dir(),
+               'src=' + meson.current_source_dir(),
+               'EXTRA_CFLAGS=-I' + meson.current_source_dir() +
+                       '/../../common/include',
+               'modules'],
+       depends: mkfile,
+       build_by_default: true)

diff --git a/lib/librte_eal/linuxapp/meson.build b/lib/librte_eal/linuxapp/meson.build
index bda974a..16a3f6b 100644 (file)
--- a/lib/librte_eal/linuxapp/meson.build
+++ b/lib/librte_eal/linuxapp/meson.build
@@ -30,3 +30,13 @@
 #   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 subdir('eal')
+
+if get_option('enable_kmods')
+       kernel_dir = get_option('kernel_dir')
+       if kernel_dir == ''
+               kernel_version = run_command('uname', '-r').stdout().strip()
+               kernel_dir = '/lib/modules/' + kernel_version + '/build'
+       endif
+
+       subdir('igb_uio')
+endif

diff --git a/meson_options.txt b/meson_options.txt
index c03b79f..9c45b81 100644 (file)
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -4,3 +4,5 @@ option('max_numa_nodes', type: 'string', value: '4', description: 'maximum numbe
 option('use_hpet', type: 'boolean', value: false, description: 'use HPET timer in EAL')
 option('allow_invalid_socket_id', type: 'boolean', value: false,
        description: 'allow out-of-range NUMA socket id\'s for platforms that don\'t report the value correctly')
+option('enable_kmods', type: 'boolean', value: true, description: 'build kernel modules')
+option('kernel_dir', type: 'string', value: '', description: 'path to the kernel for building kernel modules')