drivers/meson.build

   1 # SPDX-License-Identifier: BSD-3-Clause
   2 # Copyright(c) 2017-2019 Intel Corporation
   3
   4 if is_windows
   5         subdir_done()
   6 endif
   7
   8 # Defines the order in which the drivers are buit.
   9 dpdk_driver_classes = ['common',
  10                'bus',
  11                'mempool', # depends on common and bus.
  12                'net',     # depends on common, bus and mempool.
  13                'crypto',  # depends on common, bus and mempool (net in future).
  14                'compress', # depends on common, bus, mempool.
  15                'event',   # depends on common, bus, mempool and net.
  16                'baseband', # depends on common and bus.
  17                'raw']     # depends on common, bus, mempool, net and event.
  18
  19 disabled_drivers = get_option('disable_drivers').split(',')
  20
  21 default_cflags = machine_args
  22 if cc.has_argument('-Wno-format-truncation')
  23         default_cflags += '-Wno-format-truncation'
  24 endif
  25
  26 foreach class:dpdk_driver_classes
  27         drivers = []
  28         std_deps = []
  29         config_flag_fmt = '' # format string used to set the value in dpdk_conf
  30         driver_name_fmt = '' # format string for driver name, used to name
  31                              # the library, the dependency and to find the
  32                              # version file for linking
  33
  34         subdir(class)
  35         class_drivers = []
  36
  37         foreach drv:drivers
  38                 drv_path = join_paths(class, drv)
  39
  40                 # set up empty variables used for build
  41                 build = true # set to false to disable, e.g. missing deps
  42                 reason = '<unknown reason>' # set if build == false to explain
  43                 name = drv
  44                 version = 1
  45                 allow_experimental_apis = false
  46                 sources = []
  47                 objs = []
  48                 cflags = default_cflags
  49                 includes = [include_directories(drv_path)]
  50                 # set up internal deps. Drivers can append/override as necessary
  51                 deps = std_deps
  52                 # ext_deps: Stores external library dependency got
  53                 # using dependency() (preferred) or find_library().
  54                 # For the find_library() case (but not with dependency()) we also
  55                 # need to specify the "-l" flags in pkgconfig_extra_libs variable
  56                 # too, so that it can be reflected in the pkgconfig output for
  57                 # static builds.
  58                 ext_deps = []
  59                 pkgconfig_extra_libs = []
  60
  61                 # pull in driver directory which should assign to each of the above
  62                 subdir(drv_path)
  63
  64                 # skip disabled drivers. For meson 0.49 change this to use
  65                 # "in" keyword
  66                 foreach disable_path: disabled_drivers
  67                         if drv_path == disable_path
  68                                 build = false
  69                                 reason = 'Explicitly disabled via build config'
  70                         endif
  71                 endforeach
  72                 if build
  73                         # get dependency objs from strings
  74                         shared_deps = ext_deps
  75                         static_deps = ext_deps
  76                         foreach d:deps
  77                                 if not is_variable('shared_rte_' + d)
  78                                         build = false
  79                                         reason = 'Missing internal dependency, "@0@"'.format(d)
  80                                         message('Disabling @1@ [@2@]: missing internal dependency "@0@"'
  81                                                         .format(d, name, 'drivers/' + drv_path))
  82                                 else
  83                                         shared_deps += [get_variable('shared_rte_' + d)]
  84                                         static_deps += [get_variable('static_rte_' + d)]
  85                                 endif
  86                         endforeach
  87                 endif
  88
  89                 if not build
  90                         # some driver directories are placeholders which
  91                         # are never built, so we allow suppression of the
  92                         # component disable printout in those cases
  93                         if reason != ''
  94                                 dpdk_drvs_disabled += drv_path
  95                                 set_variable(drv_path.underscorify() +
  96                                                 '_disable_reason', reason)
  97                         endif
  98                 else
  99                         class_drivers += name
 100
 101                         dpdk_conf.set(config_flag_fmt.format(name.to_upper()),1)
 102                         lib_name = driver_name_fmt.format(name)
 103
 104                         if allow_experimental_apis
 105                                 cflags += '-DALLOW_EXPERIMENTAL_API'
 106                         endif
 107
 108                         dpdk_extra_ldflags += pkgconfig_extra_libs
 109
 110                         # generate pmdinfo sources by building a temporary
 111                         # lib and then running pmdinfogen on the contents of
 112                         # that lib. The final lib reuses the object files and
 113                         # adds in the new source file.
 114                         out_filename = lib_name + '.pmd.c'
 115                         tmp_lib = static_library('tmp_' + lib_name,
 116                                         sources,
 117                                         include_directories: includes,
 118                                         dependencies: static_deps,
 119                                         c_args: cflags)
 120                         objs += tmp_lib.extract_all_objects()
 121                         sources = custom_target(out_filename,
 122                                         command: [pmdinfo, tmp_lib.full_path(),
 123                                                 '@OUTPUT@', pmdinfogen],
 124                                         output: out_filename,
 125                                         depends: [pmdinfogen, tmp_lib])
 126
 127                         if get_option('per_library_versions')
 128                                 lib_version = '@0@.1'.format(version)
 129                                 so_version = '@0@'.format(version)
 130                         else
 131                                 lib_version = major_version
 132                                 so_version = major_version
 133                         endif
 134
 135                         # now build the static driver
 136                         static_lib = static_library(lib_name,
 137                                 sources,
 138                                 objects: objs,
 139                                 include_directories: includes,
 140                                 dependencies: static_deps,
 141                                 c_args: cflags,
 142                                 install: true)
 143
 144                         # now build the shared driver
 145                         version_map = '@0@/@1@/@2@_version.map'.format(
 146                                         meson.current_source_dir(),
 147                                         drv_path, lib_name)
 148                         shared_lib = shared_library(lib_name,
 149                                 sources,
 150                                 objects: objs,
 151                                 include_directories: includes,
 152                                 dependencies: shared_deps,
 153                                 c_args: cflags,
 154                                 link_args: '-Wl,--version-script=' + version_map,
 155                                 link_depends: version_map,
 156                                 version: lib_version,
 157                                 soversion: so_version,
 158                                 install: true,
 159                                 install_dir: driver_install_path)
 160
 161                         # create a dependency object and add it to the global dictionary so
 162                         # testpmd or other built-in apps can find it if necessary
 163                         shared_dep = declare_dependency(link_with: shared_lib,
 164                                         include_directories: includes,
 165                                         dependencies: shared_deps)
 166                         static_dep = declare_dependency(link_with: static_lib,
 167                                         include_directories: includes,
 168                                         dependencies: static_deps)
 169
 170                         dpdk_drivers += static_lib
 171
 172                         set_variable('shared_@0@'.format(lib_name), shared_dep)
 173                         set_variable('static_@0@'.format(lib_name), static_dep)
 174                         dependency_name = ''.join(lib_name.split('rte_'))
 175                         message('drivers/@0@: Defining dependency "@1@"'.format(
 176                                         drv_path, dependency_name))
 177                 endif # build
 178         endforeach
 179
 180         set_variable(class + '_drivers', class_drivers)
 181 endforeach