meson.build

   1 # Copyright © 2017 Intel Corporation
   2
   3 # Permission is hereby granted, free of charge, to any person obtaining a copy
   4 # of this software and associated documentation files (the "Software"), to deal
   5 # in the Software without restriction, including without limitation the rights
   6 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   7 # copies of the Software, and to permit persons to whom the Software is
   8 # furnished to do so, subject to the following conditions:
   9
  10 # The above copyright notice and this permission notice shall be included in
  11 # all copies or substantial portions of the Software.
  12
  13 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  16 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  17 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  18 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  19 # SOFTWARE.
  20
  21 project('mesa', ['c', 'cpp'], version : '17.3.0-devel', license : 'MIT',
  22         default_options : ['c_std=c99', 'cpp_std=c++11'])
  23
  24 # Arguments for the preprocessor, put these in a separate array from the C and
  25 # C++ (cpp in meson terminology) arguments since they need to be added to the
  26 # default arguments for both C and C++.
  27 pre_args = [
  28   '-D__STDC_CONSTANT_MACROS',
  29   '-D__STDC_FORMAT_MACROS',
  30   '-D__STDC_LIMIT_MACROS',
  31   '-DVERSION="@0@"'.format(meson.project_version()),
  32   '-DPACKAGE_VERSION=VERSION',
  33   '-DPACKAGE_BUGREPORT="https://bugs.freedesktop.org/enter_bug.cgi?product=Mesa"',
  34 ]
  35
  36 with_vulkan_icd_dir = get_option('vulkan-icd-dir')
  37 with_tests = get_option('build-tests')
  38 with_valgrind = get_option('valgrind')
  39 with_asm = get_option('asm')
  40
  41 # XXX: yeah, do these
  42 with_appledri = false
  43 with_windowsdri = false
  44
  45 dri_drivers_path = get_option('dri-drivers-path')
  46 if dri_drivers_path == ''
  47   dri_drivers_path = join_paths(get_option('libdir'), 'dri')
  48 endif
  49
  50 with_gles1 = get_option('gles1')
  51 with_gles2 = get_option('gles2')
  52 with_opengl = get_option('opengl')
  53 with_any_opengl = with_opengl or with_gles1 or with_gles2
  54 # Only build shared_glapi if at least one OpenGL API is enabled
  55 with_shared_glapi = get_option('shared-glapi') and with_any_opengl
  56
  57 # TODO: these will need options, but at the moment they just control header
  58 # installs
  59 with_osmesa = false
  60
  61 # shared-glapi is required if at least two OpenGL APIs are being built
  62 if not with_shared_glapi
  63   if ((with_gles1 and with_gles2) or (with_gles1 and with_opengl)
  64       or (with_gles2 and with_opengl))
  65     error('shared-glapi required for building two or more of OpenGL, OpenGL ES 1.x, OpenGL ES 2.x')
  66   endif
  67 endif
  68
  69 # We require OpenGL for OpenGL ES
  70 if (with_gles1 or with_gles2) and not with_opengl
  71   error('building OpenGL ES without OpenGL is not supported.')
  72 endif
  73
  74 with_dri = false
  75 with_dri_i965 = false
  76 _drivers = get_option('dri-drivers')
  77 if _drivers != ''
  78   _split = _drivers.split(',')
  79   with_dri_i965 = _split.contains('i965')
  80   with_dri = true
  81 endif
  82
  83 if not with_dri
  84   with_gles1 = false
  85   with_gles2 = false
  86   with_opengl = false
  87   with_any_opengl = false
  88   with_shared_glapi = false
  89 endif
  90
  91 # TODO: other OSes
  92 with_dri_platform = 'drm'
  93
  94 with_gallium = false
  95 # TODO: gallium drivers
  96
  97 # TODO: conditionalize libdrm requirement
  98 dep_libdrm = dependency('libdrm', version : '>= 2.4.75')
  99 pre_args += '-DHAVE_LIBDRM'
 100
 101 with_dri2 = with_dri_platform == 'drm' and dep_libdrm.found()
 102 with_dri3 = get_option('dri3')
 103 if with_dri3 == 'auto'
 104   if host_machine.system() == 'linux'
 105     with_dri3 = true
 106   else
 107     with_dri3 = false
 108  endif
 109 elif with_dri3 == 'yes'
 110   with_dri3 = true
 111 else
 112   with_dri3 = false
 113 endif
 114
 115 # TODO: there are more platforms required for non-vulkan drivers
 116 with_platform_wayland = false
 117 with_platform_x11 = false
 118 _platforms = get_option('platforms')
 119 if _platforms != ''
 120   _split = _platforms.split(',')
 121   with_platform_x11 = _split.contains('x11')
 122   with_platform_wayland = _split.contains('wayland')
 123 endif
 124
 125 with_glx = get_option('glx')
 126 if with_glx != 'disabled'
 127   pre_args += '-DGLX_USE_TLS'
 128   if not (with_platform_x11 and with_any_opengl) and with_glx != 'auto'
 129     error('Cannot build GLX support without X11 platform support and at least one OpenGL API')
 130   elif with_glx == 'gallium-xlib'
 131     if not with_gallium
 132       error('Gallium-xlib based GLX requires at least one gallium driver')
 133     elif with_dri
 134       error('gallium-xlib conflicts with any dri driver')
 135     endif
 136   elif with_glx == 'dri' and not with_dri
 137     error('dri based GLX requires at least one DRI driver')
 138   elif with_glx == 'auto'
 139     if with_dri
 140       with_glx = 'dri'
 141     elif with_gallium
 142       with_glx = 'gallium-xlib'
 143     elif with_platform_x11 and with_any_opengl
 144       with_glx = 'xlib'
 145     else
 146       with_glx = 'disabled'
 147     endif
 148   endif
 149 endif
 150
 151 with_glvnd = get_option('glvnd')
 152 if with_glvnd and with_glx != 'dri'
 153   message('glvnd requires dri based glx')
 154 endif
 155
 156 # TODO: toggle for this
 157 with_glx_direct = true
 158
 159 if with_vulkan_icd_dir == ''
 160   with_vulkan_icd_dir = join_paths(get_option('datadir'), 'vulkan/icd.d')
 161 endif
 162
 163 with_intel_vk = false
 164 with_amd_vk = false
 165 with_any_vk = false
 166 _vulkan_drivers = get_option('vulkan-drivers')
 167 if _vulkan_drivers != ''
 168   _split = _vulkan_drivers.split(',')
 169   with_intel_vk = _split.contains('intel')
 170   with_amd_vk = _split.contains('amd')
 171   with_any_vk = with_amd_vk or with_intel_vk
 172   if not (with_platform_x11 or with_platform_wayland)
 173     error('Vulkan requires at least one platform (x11, wayland)')
 174   endif
 175   if with_platform_x11 and not with_dri3
 176     error('Vulkan drivers require dri3 for X11 support')
 177   endif
 178 endif
 179
 180 if with_dri # TODO: or gallium
 181   if with_glx == 'disabled' # TODO: or egl
 182     error('building dri or gallium drivers require at least one window system')
 183   endif
 184 endif
 185
 186 prog_python2 = find_program('python2')
 187 has_mako = run_command(prog_python2, '-c', 'import mako')
 188 if has_mako.returncode() != 0
 189   error('Python (2.x) mako module required to build mesa.')
 190 endif
 191
 192 cc = meson.get_compiler('c')
 193 if cc.get_id() == 'gcc' and cc.version().version_compare('< 4.4.6')
 194   error('When using GCC, version 4.4.6 or later is required.')
 195 endif
 196
 197 # Define DEBUG for debug and debugoptimized builds
 198 if get_option('buildtype').startswith('debug')
 199   pre_args += '-DDEBUG'
 200 endif
 201
 202 if get_option('shader-cache')
 203   pre_args += '-DENABLE_SHADER_CACHE'
 204 elif with_amd_vk
 205   error('Radv requires shader cache support')
 206 endif
 207
 208 # Check for GCC style builtins
 209 foreach b : ['bswap32', 'bswap64', 'clz', 'clzll', 'ctz', 'expect', 'ffs',
 210              'ffsll', 'popcount', 'popcountll', 'unreachable']
 211   if cc.has_function(b)
 212     pre_args += '-DHAVE___BUILTIN_@0@'.format(b.to_upper())
 213   endif
 214 endforeach
 215
 216 # check for GCC __attribute__
 217 foreach a : ['const', 'flatten', 'malloc', 'pure', 'unused',
 218              'warn_unused_result', 'weak',]
 219   if cc.compiles('int foo(void) __attribute__((@0@));'.format(a),
 220                  name : '__attribute__((@0@))'.format(a))
 221     pre_args += '-DHAVE_FUNC_ATTRIBUTE_@0@'.format(a.to_upper())
 222   endif
 223 endforeach
 224 if cc.compiles('int foo(const char *p, ...) __attribute__((format(printf, 1, 2)));',
 225                name : '__attribute__((format(...)))')
 226   pre_args += '-DHAVE_FUNC_ATTRIBUTE_FORMAT'
 227 endif
 228 if cc.compiles('struct __attribute__((packed)) foo { int bar; };',
 229                name : '__attribute__((packed))')
 230   pre_args += '-DHAVE_FUNC_ATTRIBUTE_PACKED'
 231 endif
 232 if cc.compiles('int *foo(void) __attribute__((returns_nonnull));',
 233                name : '__attribute__((returns_nonnull))')
 234   pre_args += '-DHAVE_FUNC_ATTRIBUTE_NONNULL'
 235 endif
 236 if cc.compiles('''int foo_def(void) __attribute__((visibility("default")));
 237                   int foo_hid(void) __attribute__((visibility("hidden")));
 238                   int foo_int(void) __attribute__((visibility("internal")));
 239                   int foo_pro(void) __attribute__((visibility("protected")));''',
 240                name : '__attribute__((visibility(...)))')
 241   pre_args += '-DHAVE_FUNC_ATTRIBUTE_VISBILITY'
 242 endif
 243 if cc.compiles('int foo(void) { return 0; } int bar(void) __attribute__((alias("foo")));',
 244                name : '__attribute__((alias(...)))')
 245   pre_args += '-DHAVE_FUNC_ATTRIBUTE_ALIAS'
 246 endif
 247
 248 # TODO: this is very incomplete
 249 if host_machine.system() == 'linux'
 250   pre_args += '-D_GNU_SOURCE'
 251 endif
 252
 253 # Check for generic C arguments
 254 c_args = []
 255 foreach a : ['-Wall', '-Werror=implicit-function-declaration',
 256              '-Werror=missing-prototypes', '-fno-math-errno',
 257              '-fno-trapping-math', '-Qunused-arguments']
 258   if cc.has_argument(a)
 259     c_args += a
 260   endif
 261 endforeach
 262 c_vis_args = []
 263 if cc.has_argument('-fvisibility=hidden')
 264   c_vis_args += '-fvisibility=hidden'
 265 endif
 266
 267 # Check for generic C++ arguments
 268 cpp = meson.get_compiler('cpp')
 269 cpp_args = []
 270 foreach a : ['-Wall', '-fno-math-errno', '-fno-trapping-math',
 271              '-Qunused-arguments', '-Wno-non-virtual-dtor']
 272   if cpp.has_argument(a)
 273     cpp_args += a
 274   endif
 275 endforeach
 276 cpp_vis_args = []
 277 if cpp.has_argument('-fvisibility=hidden')
 278   cpp_vis_args += '-fvisibility=hidden'
 279 endif
 280
 281 # Check for C and C++ arguments for MSVC2013 compatibility. These are only used
 282 # in parts of the mesa code base that need to compile with old versions of
 283 # MSVC, mainly common code
 284 c_msvc_compat_args = []
 285 cpp_msvc_compat_args = []
 286 foreach a : ['-Werror=pointer-arith', '-Werror=vla']
 287   if cc.has_argument(a)
 288     c_msvc_compat_args += a
 289   endif
 290   if cpp.has_argument(a)
 291     cpp_msvc_compat_args += a
 292   endif
 293 endforeach
 294
 295 no_override_init_args = []
 296 foreach a : ['-Wno-override-init', '-Wno-initializer-overrides']
 297   if cc.has_argument(a)
 298     no_override_init_args += a
 299   endif
 300 endforeach
 301
 302 # TODO: SSE41 (which is only required for core mesa)
 303
 304 # Check for GCC style atomics
 305 if cc.compiles('int main() { int n; return __atomic_load_n(&n, __ATOMIC_ACQUIRE); }',
 306                name : 'GCC atomic builtins')
 307   pre_args += '-DUSE_GCC_ATOMIC_BUILTINS'
 308 endif
 309 if not cc.links('''#include <stdint.h>
 310                    uint64_t v;
 311                    int main() {
 312                      return __sync_add_and_fetch(&v, (uint64_t)1);
 313                    }''',
 314                 name : 'GCC 64bit atomics')
 315   pre_args += '-DMISSING_64_BIT_ATOMICS'
 316 endif
 317
 318 # TODO: endian
 319 # TODO: powr8
 320 # TODO: shared/static? Is this even worth doing?
 321
 322 # I don't think that I need to set any of the debug stuff, I think meson
 323 # handles that for us
 324
 325 # TODO: ldflags
 326
 327 # TODO: texture-float (gallium/mesa only)
 328
 329 # TODO: cross-compiling. I don't think this is relavent to meson
 330
 331 # FIXME: enable asm when cross compiler
 332 # This is doable (autotools does it), but it's not of immediate concern
 333 if meson.is_cross_build()
 334   message('Cross compiling, disabling asm')
 335   with_asm = false
 336 endif
 337
 338 with_asm_arch = ''
 339 if with_asm
 340   # TODO: SPARC and PPC
 341   if host_machine.cpu_family() == 'x86'
 342     if ['linux', 'bsd'].contains(host_machine.system()) # FIXME: hurd?
 343       with_asm_arch = 'x86'
 344       pre_args += ['-DUSE_X86_ASM', '-DUSE_MMX_ASM', '-DUSE_3DNOW_ASM',
 345                    '-DUSE_SSE_ASM']
 346     endif
 347   elif host_machine.cpu_family() == 'x86_64'
 348     if host_machine.system() == 'linux'
 349       with_asm_arch = 'x86_64'
 350       pre_args += ['-DUSE_X86_64_ASM']
 351     endif
 352   elif host_machine.cpu_family() == 'arm'
 353     if host_machine.system() == 'linux'
 354       with_asm_arch = 'arm'
 355       pre_args += ['-DUSE_ARM_ASM']
 356     endif
 357   elif host_machine.cpu_family() == 'aarch64'
 358     if host_machine.system() == 'linux'
 359       with_asm_arch = 'aarch64'
 360       pre_args += ['-DUSE_AARCH64_ASM']
 361     endif
 362   endif
 363 endif
 364
 365 # Check for standard headers and functions
 366 if cc.has_header_symbol('sys/sysmacros.h', 'major')
 367   pre_args += '-DMAJOR_IN_SYSMACROS'
 368 elif cc.has_header_symbol('sys/mkdev.h', 'major')
 369   pre_args += '-DMAJOR_IN_MKDEV'
 370 endif
 371
 372 foreach h : ['xlocale.h', 'sys/sysctl.h']
 373   if cc.has_header(h)
 374     pre_args += '-DHAVE_@0@'.format(h.to_upper().underscorify())
 375   endif
 376 endforeach
 377
 378 foreach f : ['strtof', 'mkostemp', 'posix_memalign']
 379   if cc.has_function(f)
 380     pre_args += '-DHAVE_@0@'.format(f.to_upper())
 381   endif
 382 endforeach
 383
 384 # strtod locale support
 385 if cc.links('''
 386     #define _GNU_SOURCE
 387     #include <stdlib.h>
 388     #include <locale.h>
 389     #ifdef HAVE_XLOCALE_H
 390     #include <xlocale.h>
 391     #endif
 392     int main() {
 393       locale_t loc = newlocale(LC_CTYPE_MASK, "C", NULL);
 394       const char *s = "1.0";
 395       char *end;
 396       double d = strtod_l(s, end, loc);
 397       float f = strtod_l(s, end, loc);
 398       freelocale(loc);
 399       return 0;
 400     }''',
 401     extra_args : pre_args,
 402     name : 'strtod has locale support')
 403   pre_args += '-DHAVE_STRTOD_L'
 404 endif
 405
 406 # Check for some linker flags
 407 ld_args_bsymbolic = []
 408 if cc.links('int main() { return 0; }', args : '-Wl,-Bsymbolic')
 409   ld_args_bsymbolic += '-Wl,-Bsymbolic'
 410 endif
 411 ld_args_gc_sections = []
 412 if cc.links('static char unused() { return 5; } int main() { return 0; }',
 413             args : '-Wl,--gc-sections')
 414   ld_args_gc_sections += '-Wl,--gc-sections'
 415 endif
 416
 417 # check for dl support
 418 if cc.has_function('dlopen')
 419   dep_dl = []
 420 else
 421   dep_dl = cc.find_library('dl')
 422 endif
 423 if cc.has_function('dladdr', dependencies : dep_dl)
 424   # This is really only required for megadrivers
 425   pre_args += '-DHAVE_DLADDR'
 426 endif
 427
 428 if cc.has_function('dl_iterate_phdr')
 429   pre_args += '-DHAVE_DL_ITERATE_PHDR'
 430 else
 431   # TODO: this is required for vulkan
 432 endif
 433
 434 # Determine whether or not the rt library is needed for time functions
 435 if cc.has_function('clock_gettime')
 436   dep_clock = []
 437 else
 438   dep_clock = cc.find_library('rt')
 439 endif
 440
 441 # TODO: some of these may be conditional
 442 dep_zlib = dependency('zlib', version : '>= 1.2.3')
 443 dep_thread = dependency('threads')
 444 pre_args += '-DHAVE_PTHREAD'
 445 dep_elf = dependency('libelf', required : false)
 446 if not dep_elf.found()
 447   dep_elf = cc.find_library('elf', required : with_amd_vk) # TODO: clover, r600, radeonsi
 448 endif
 449 dep_expat = dependency('expat')
 450 # this only exists on linux so either this is linux and it will be found, or
 451 # its not linux and and wont
 452 dep_m = cc.find_library('m', required : false)
 453
 454 dep_libdrm_amdgpu = []
 455 if with_amd_vk
 456   dep_libdrm_amdgpu = dependency('libdrm_amdgpu', version : '>= 2.4.82')
 457 endif
 458
 459 llvm_modules = ['bitwriter', 'engine', 'mcdisassembler', 'mcjit']
 460 if with_amd_vk
 461   llvm_modules += ['amdgpu', 'bitreader', 'ipo']
 462 endif
 463 dep_llvm = dependency(
 464   'llvm', version : '>= 3.9.0', required : false, modules : llvm_modules,
 465 )
 466 if not dep_llvm.found()
 467   if with_amd_vk
 468     error('Radv requires llvm.')
 469   endif
 470 else
 471   _llvm_version = dep_llvm.version().split('.')
 472   # Development versions of LLVM have an 'svn' suffix, we don't want that for
 473   # our version checks.
 474   _llvm_patch = _llvm_version[2]
 475   if _llvm_patch.endswith('svn')
 476     _llvm_patch = _llvm_patch.split('s')[0]
 477   endif
 478   pre_args += [
 479     '-DHAVE_LLVM=0x0@0@@1@@2@'.format(_llvm_version[0], _llvm_version[1], _llvm_patch),
 480     '-DMESA_LLVM_VERSION_PATCH=@0@'.format(_llvm_patch),
 481   ]
 482 endif
 483
 484 dep_glvnd = []
 485 if with_glvnd
 486   dep_glvnd = dependency('libglvnd', version : '>= 0.2.0')
 487   pre_args += '-DUSE_LIBGLVND=1'
 488 endif
 489
 490 # TODO: make this conditional
 491 dep_valgrind = dependency('valgrind', required : false)
 492 if dep_valgrind.found() and with_valgrind
 493   pre_args += '-DHAVE_VALGRIND'
 494 endif
 495
 496 # pthread stubs. Lets not and say we didn't
 497
 498 prog_bison = find_program('bison', required : with_any_opengl)
 499 prog_flex = find_program('flex', required : with_any_opengl)
 500
 501 # TODO: selinux
 502 dep_selinux = []
 503
 504 # TODO: llvm-prefix and llvm-shared-libs
 505
 506 # TODO: unwind (llvm [radeon, gallivm] and gallium)
 507
 508 # TODO: flags for opengl, gles, dri
 509
 510 # TODO: gallium-hud
 511
 512 # TODO: glx provider
 513
 514 # TODO: osmesa provider
 515
 516 # TODO: flags for xa, egl, gbm, nin, xvmc, vdpau, omx, va, opencl,
 517 #       gallium-tests,
 518
 519 # TODO: gallium drivers
 520
 521 # TODO: symbol mangling
 522
 523 # TODO: egl configuration
 524
 525 if with_platform_wayland
 526   prog_wl_scanner = find_program('wayland-scanner')
 527   dep_wl_protocols = dependency('wayland-protocols', version : '>= 1.8')
 528   dep_wayland_client = dependency('wayland-client', version : '>=1.11')
 529   dep_wayland_server = dependency('wayland-server', version : '>=1.11')
 530 else
 531   prog_wl_scanner = []
 532   dep_wl_protocols = []
 533   dep_wayland_client = []
 534   dep_wayland_server = []
 535 endif
 536
 537 dep_xcb_dri2 = []
 538 dep_xcb_dri3 = []
 539 dep_dri2proto = []
 540 dep_glproto = []
 541 dep_x11 = []
 542 dep_xf86vm = []
 543 if with_platform_x11
 544   if with_glx == 'xlib'
 545     # TODO
 546     error('TODO')
 547   elif with_glx == 'gallium-xlib'
 548     # TODO
 549     error('TODO')
 550   else
 551     pre_args += '-DGLX_INDIRECT_RENDERING'
 552     if with_glx_direct
 553       pre_args += '-DGLX_DIRECT_RENDERING'
 554     endif
 555     if with_dri_platform == 'drm'
 556       pre_args += '-DGLX_USE_DRM'
 557       dep_dri2proto = dependency('dri2proto', version : '>= 2.8')
 558       dep_x11 = [
 559         dependency('x11'),
 560         dependency('xext'),
 561         dependency('xdamage', version : '>= 1.1'),
 562         dependency('xfixes'),
 563         dependency('x11-xcb'),
 564         dependency('xcb'),
 565         dependency('xcb-glx', version : '>= 1.8.1'),
 566       ]
 567
 568       dep_xf86vm = dependency('xf86vm', required : false)
 569     endif
 570     # TODO: XF86VIDMODE
 571   endif
 572   if with_glx != 'disabled'
 573     dep_glproto = dependency('glproto', version : '>= 1.4.14')
 574   endif
 575   if with_any_vk or (with_glx == 'dri' and with_dri_platform == 'drm')
 576     dep_xcb_dri2 = [
 577       dependency('x11-xcb'),
 578       dependency('xcb'),
 579       dependency('xcb-dri2', version : '>= 1.8'),
 580       dependency('xcb-xfixes'),
 581     ]
 582     pre_args += '-DHAVE_X11_PLATFORM'
 583     if with_dri3
 584       pre_args += '-DHAVE_DRI3'
 585       dep_xcb_dri3 = [
 586         dep_xcb_dri2,
 587         dependency('xcb-dri3'),
 588         dependency('xcb-present'),
 589         dependency('xcb-sync'),
 590         dependency('xshmfence', version : '>= 1.1'),
 591       ]
 592     endif
 593   endif
 594 endif
 595
 596 # TODO: platforms for !vulkan
 597
 598 # TODO: osmesa
 599
 600 # TODO: egl
 601
 602 # TODO: xa
 603
 604 # TODO: vallium G3DVL
 605
 606 # TODO: nine
 607
 608 # TODO: clover
 609
 610 # TODO: egl sans x11
 611
 612 # TODO: xvmc
 613
 614 # TODO: gallium tests
 615
 616 # TODO: various libdirs
 617
 618 # TODO: swr
 619
 620 # TODO: gallium driver dirs
 621
 622 # FIXME: this is a workaround for #2326
 623 prog_touch = find_program('touch')
 624 dummy_cpp = custom_target(
 625   'dummy_cpp',
 626   output : 'dummy.cpp',
 627   command : [prog_touch, '@OUTPUT@'],
 628 )
 629
 630 foreach a : pre_args
 631   add_project_arguments(a, language : ['c', 'cpp'])
 632 endforeach
 633 foreach a : c_args
 634   add_project_arguments(a, language : ['c'])
 635 endforeach
 636 foreach a : cpp_args
 637   add_project_arguments(a, language : ['cpp'])
 638 endforeach
 639
 640 inc_include = include_directories('include')
 641
 642 pkg = import('pkgconfig')
 643
 644 subdir('include')
 645 subdir('src')