On FreeBSD, add dependency on epoll-shim library.

FreeBSD doesn't provide timerfd and eventfd functions. These are implemented in
3rd party library called epoll-shim. Link targets requiring these functions to
this library.

meson.build

@@ -207,8 +207,12 @@ if get_option('gstreamer')
              dependency('gstreamer-allocators-1.0'),]
 endif
 
-subdir('spa')
+# On FreeBSD, epoll-shim library is required for eventfd() and timerfd()
+epoll_shim_dep = (build_machine.system() == 'freebsd'
+    ? dependency('epoll-shim', required: true)
+    : dependency('', required: false))
 
+subdir('spa')
 subdir('src')
 
 if get_option('pipewire-jack')

spa/examples/meson.build

@@ -7,5 +7,5 @@ endif
 
 executable('example-control', 'example-control.c',
              include_directories : [spa_inc ],
-	     dependencies : [dl_lib, pthread_lib, mathlib],
+             dependencies : [dl_lib, pthread_lib, mathlib, epoll_shim_dep],
              install : false)

spa/plugins/alsa/meson.build

@@ -10,6 +10,6 @@ spa_alsa_sources = ['alsa.c',
 spa_alsa = shared_library('spa-alsa',
                            spa_alsa_sources,
                            include_directories : [spa_inc],
-                           dependencies : [ alsa_dep, libudev_dep, mathlib ],
+                           dependencies : [ alsa_dep, libudev_dep, mathlib, epoll_shim_dep ],
                            install : true,
                            install_dir : '@0@/spa/alsa'.format(get_option('libdir')))

spa/plugins/audiotestsrc/meson.build

@@ -3,6 +3,6 @@ audiotestsrc_sources = ['audiotestsrc.c', 'plugin.c']
 audiotestsrclib = shared_library('spa-audiotestsrc',
                           audiotestsrc_sources,
                           include_directories : [spa_inc],
-                          dependencies : mathlib,
+                          dependencies : [mathlib, epoll_shim_dep],
                           install : true,
                           install_dir : '@0@/spa/audiotestsrc'.format(get_option('libdir')))

spa/plugins/support/meson.build

@@ -8,7 +8,7 @@ spa_support_lib = shared_library('spa-support',
 			spa_support_sources,
 			c_args : [ '-D_GNU_SOURCE' ],
 			include_directories : [ spa_inc ],
-			dependencies : [ pthread_lib ],
+			dependencies : [ pthread_lib, epoll_shim_dep ],
 			install : true,
 			install_dir : '@0@/spa/support'.format(get_option('libdir')))
 
@@ -35,6 +35,6 @@ spa_dbus_sources = ['dbus.c']
 spa_dbus_lib = shared_library('spa-dbus',
 			spa_dbus_sources,
 			include_directories : [ spa_inc],
-			dependencies : dbus_dep,
+			dependencies : [dbus_dep, epoll_shim_dep],
 			install : true,
 			install_dir : '@0@/spa/support'.format(get_option('libdir')))

spa/plugins/test/meson.build

@@ -3,6 +3,6 @@ test_sources = ['fakesrc.c', 'fakesink.c', 'plugin.c']
 testlib = shared_library('spa-test',
                           test_sources,
                           include_directories : [ spa_inc],
-                          dependencies : pthread_lib,
+                          dependencies : [pthread_lib, epoll_shim_dep],
                           install : true,
                           install_dir : '@0@/spa/test'.format(get_option('libdir')))

spa/plugins/v4l2/meson.build

@@ -6,6 +6,6 @@ v4l2_sources = ['v4l2.c',
 v4l2lib = shared_library('spa-v4l2',
                           v4l2_sources,
                           include_directories : [ spa_inc ],
-                          dependencies : [ libudev_dep ],
+                          dependencies : [ libudev_dep, epoll_shim_dep ],
                           install : true,
                           install_dir : '@0@/spa/v4l2'.format(get_option('libdir')))

spa/plugins/videotestsrc/meson.build

@@ -3,6 +3,6 @@ videotestsrc_sources = ['videotestsrc.c', 'plugin.c']
 videotestsrclib = shared_library('spa-videotestsrc',
                                  videotestsrc_sources,
                                  include_directories : [ spa_inc],
-                                 dependencies : pthread_lib,
+                                 dependencies : [pthread_lib, epoll_shim_dep],
                                  install : true,
                                  install_dir : '@0@/spa/videotestsrc'.format(get_option('libdir')))

spa/tests/meson.build

@@ -20,7 +20,7 @@ endforeach
 if have_cpp
 test_cpp = executable('spa-test-cpp', 'test-cpp.cpp',
                         include_directories : [spa_inc ],
-                        dependencies : [],
+                        dependencies : [epoll_shim_dep],
                         install : false)
 test('spa-test-cpp', test_cpp)
 endif

spa/tools/meson.build

@@ -1,9 +1,9 @@
 executable('spa-inspect', 'spa-inspect.c',
            include_directories : [spa_inc],
-           dependencies : [dl_lib],
+           dependencies : [dl_lib, epoll_shim_dep],
            install : true)
 
 executable('spa-monitor', 'spa-monitor.c',
            include_directories : [spa_inc],
-           dependencies : [dl_lib],
+           dependencies : [dl_lib, epoll_shim_dep],
            install : true)

src/daemon/meson.build

@@ -30,7 +30,7 @@ executable('pipewire',
   install: true,
   c_args : pipewire_c_args,
   include_directories : [configinc, spa_inc],
-  dependencies : [pipewire_dep],
+  dependencies : [pipewire_dep, epoll_shim_dep],
 )
 
 if get_option('systemd') and systemd.found()

src/pipewire/meson.build

@@ -75,10 +75,15 @@ install_headers(pipewire_headers, subdir : 'pipewire')
 
 libpipewire_c_args = [
   '-DHAVE_CONFIG_H',
-  '-D_GNU_SOURCE',
-  '-D_POSIX_C_SOURCE',
 ]
 
+if build_machine.system() != 'freebsd'
+  libpipewire_c_args += [
+    '-D_GNU_SOURCE',
+    '-D_POSIX_C_SOURCE'
+  ]
+endif
+
 libpipewire_name = 'pipewire-@0@'.format(apiversion)
 libpipewire = shared_library(libpipewire_name, pipewire_sources,
   version : libversion,
@@ -86,12 +91,12 @@ libpipewire = shared_library(libpipewire_name, pipewire_sources,
   c_args : libpipewire_c_args,
   include_directories : [pipewire_inc, configinc, spa_inc],
   install : true,
-  dependencies : [dl_lib, mathlib, pthread_lib],
+  dependencies : [dl_lib, mathlib, pthread_lib, epoll_shim_dep],
 )
 
 pipewire_dep = declare_dependency(link_with : libpipewire,
   include_directories : [pipewire_inc, configinc, spa_inc],
-  dependencies : [pthread_lib],
+  dependencies : [pthread_lib, epoll_shim_dep],
 )
 
 pkgconfig.generate(filebase : 'lib@0@'.format(libpipewire_name),