build: remove architecture flag as default C flag

Any flags added to the project args are automatically added to all builds,
both native and cross-compiled. This is not what we want for the -march
flag as a valid -march for the cross-compile is not valid for pmdinfogen
which is a native-build tool.

Instead we store the march flag as a variable, and add it to the default
cflags for all libs, drivers, examples, etc. This will allow pmdinfogen to
compile successfully in a cross-compilation environment.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Luca Boccassi <bluca@debian.org>

diff --git a/app/test-pmd/meson.build b/app/test-pmd/meson.build
index a242703..4614e35 100644 (file)
--- a/app/test-pmd/meson.build
+++ b/app/test-pmd/meson.build
@@ -45,7 +45,7 @@ endif
 
 executable('dpdk-testpmd',
        sources,
-       c_args: '-DALLOW_EXPERIMENTAL_API',
+       c_args: [machine_arg, '-DALLOW_EXPERIMENTAL_API'],
        link_whole: link_libs,
        dependencies: dep_objs,
        install_rpath: join_paths(get_option('prefix'), driver_install_path),

diff --git a/buildtools/pmdinfogen/meson.build b/buildtools/pmdinfogen/meson.build
index ea37370..a219a8e 100644 (file)
--- a/buildtools/pmdinfogen/meson.build
+++ b/buildtools/pmdinfogen/meson.build
@@ -6,5 +6,4 @@ pmdinfogen_inc += include_directories('../../lib/librte_pci')
 pmdinfogen = executable('pmdinfogen',
        'pmdinfogen.c',
        include_directories: pmdinfogen_inc,
-       native: true,
-       c_args: cflags)
+       native: true)

diff --git a/config/meson.build b/config/meson.build
index 4f65117..9522304 100644 (file)
--- a/config/meson.build
+++ b/config/meson.build
@@ -2,9 +2,13 @@
 # Copyright(c) 2017 Intel Corporation
 
 # set the machine type and cflags for it
-machine = get_option('machine')
+if meson.is_cross_build()
+       machine = host_machine.cpu()
+else
+       machine = get_option('machine')
+endif
 dpdk_conf.set('RTE_MACHINE', machine)
-add_project_arguments('-march=@0@'.format(machine), language: 'c')
+machine_arg = '-march=' + machine
 
 # use pthreads
 add_project_link_arguments('-pthread', language: 'c')

diff --git a/doc/guides/contributing/coding_style.rst b/doc/guides/contributing/coding_style.rst
index 3734bf0..d5fe67f 100644 (file)
--- a/doc/guides/contributing/coding_style.rst
+++ b/doc/guides/contributing/coding_style.rst
@@ -800,7 +800,7 @@ build
 
 
 cflags
-       **Default Value = []**.
+       **Default Value = [<-march/-mcpu flags>]**.
        Used to specify any additional cflags that need to be passed to compile
        the sources in the library.
 

diff --git a/drivers/meson.build b/drivers/meson.build
index f6680ce..5ee0026 100644 (file)
--- a/drivers/meson.build
+++ b/drivers/meson.build
@@ -23,7 +23,7 @@ foreach class:driver_classes
                allow_experimental_apis = false
                sources = []
                objs = []
-               cflags = []
+               cflags = [machine_arg]
                includes = [include_directories(drv_path)]
                # set up internal deps. Drivers can append/override as necessary
                deps = std_deps

diff --git a/drivers/net/i40e/meson.build b/drivers/net/i40e/meson.build
index 42a8a1d..504bfdd 100644 (file)
--- a/drivers/net/i40e/meson.build
+++ b/drivers/net/i40e/meson.build
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2017 Intel Corporation
 
-cflags = ['-DPF_DRIVER',
+cflags += ['-DPF_DRIVER',
        '-DVF_DRIVER',
        '-DINTEGRATED_VF',
        '-DX722_A0_SUPPORT']

diff --git a/drivers/net/ixgbe/meson.build b/drivers/net/ixgbe/meson.build
index 36aaff5..60af0ba 100644 (file)
--- a/drivers/net/ixgbe/meson.build
+++ b/drivers/net/ixgbe/meson.build
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2017 Intel Corporation
 
-cflags = ['-DRTE_LIBRTE_IXGBE_BYPASS']
+cflags += ['-DRTE_LIBRTE_IXGBE_BYPASS']
 
 subdir('base')
 objs = [base_objs]

diff --git a/examples/meson.build b/examples/meson.build
index b660b4b..cef48fa 100644 (file)
--- a/examples/meson.build
+++ b/examples/meson.build
@@ -10,7 +10,7 @@ foreach example: get_option('examples').split(',')
        name = example
        sources = []
        allow_experimental_apis = false
-       cflags = []
+       cflags = [machine_arg]
        ext_deps = []
        includes = [include_directories(example)]
        deps = ['eal', 'mempool', 'net', 'mbuf', 'ethdev', 'cmdline']

diff --git a/lib/meson.build b/lib/meson.build
index de75162..e8302fb 100644 (file)
--- a/lib/meson.build
+++ b/lib/meson.build
@@ -33,7 +33,7 @@ foreach l:libraries
        sources = []
        headers = []
        includes = []
-       cflags = []
+       cflags = [machine_arg]
        objs = [] # other object files to link against, used e.g. for
                  # instruction-set optimized versions of code
 

diff --git a/meson.build b/meson.build
index 56a8c64..f572d93 100644 (file)
--- a/meson.build
+++ b/meson.build
@@ -65,5 +65,5 @@ pkg.generate(name: meson.project_name(),
                        ['-Wl,-Bdynamic'] + dpdk_extra_ldflags,
        description: 'The Data Plane Development Kit (DPDK)',
        subdirs: [get_option('include_subdir_arch'), '.'],
-       extra_cflags: ['-include', 'rte_config.h', '-march=@0@'.format(machine)]
+       extra_cflags: ['-include', 'rte_config.h', machine_arg]
 )