meson: Enable building shm plugin

sys/meson.build

@@ -16,7 +16,7 @@ subdir('kms')
 subdir('msdk')
 #subdir('nvenc')
 #subdir('opensles')
-#subdir('shm')
+subdir('shm')
 subdir('uvch264')
 #subdir('vcd')
 #subdir('vdpau')

sys/shm/meson.build

@@ -0,0 +1,28 @@
+shm_sources = [
+  'shmpipe.c',
+  'shmalloc.c',
+  'gstshm.c',
+  'gstshmsrc.c',
+  'gstshmsink.c',
+]
+
+rt_dep = cc.find_library ('rt', required: false)
+
+if cc.has_header ('sys/socket.h') and (host_system == 'osx' or
+    host_system == 'bsd' or rt_dep.found())
+
+  deps = [gstbase_dep]
+
+  if rt_dep.found()
+    deps += [rt_dep]
+  endif
+  
+  gstshm = library('gstshm',
+    shm_sources,
+    c_args : gst_plugins_bad_args + ['-DSHM_PIPE_USE_GLIB'],
+    include_directories : [configinc],
+    dependencies : deps,
+    install : true,
+    install_dir : plugins_install_dir,
+  )
+endif