meson: fix build on FreeBSD of terminology.

The option generated file causes lot of issues when it's
included in source files via private.h. Linux needs these
but FreeBSD breaks. Other option is to change header
inclusion ordering but that is messy.

meson.build

@@ -26,13 +26,18 @@ config_data.set_quoted('PACKAGE_DATA_DIR',
 config_data.set_quoted('PACKAGE_LIB_DIR',
                        join_paths(prefix, get_option('libdir')))
 config_data.set_quoted('LOCALEDIR', join_paths(prefix, get_option('localedir')))
-config_data.set('_GNU_SOURCE', 1)
-config_data.set('__EXTENSIONS__', 1)
-config_data.set('_POSIX_PTHREAD_SEMANTICS', 1)
-config_data.set('_TANDEM_SOURCE', 1)
-config_data.set('_ALL_SOURCE', 1)
-config_data.set('_POSIX_SOURCE', 1)
-config_data.set('_POSIX_1_SOURCE', 1)
+
+host_os = host_machine.system()
+
+if host_os == 'linux'
+   config_data.set('_GNU_SOURCE', 1)
+   config_data.set('__EXTENSIONS__', 1)
+   config_data.set('_POSIX_PTHREAD_SEMANTICS', 1)
+   config_data.set('_TANDEM_SOURCE', 1)
+   config_data.set('_ALL_SOURCE', 1)
+   config_data.set('_POSIX_SOURCE', 1)
+   config_data.set('_POSIX_1_SOURCE', 1)
+endif
 
 efl_version = '1.8.0'
 efl_deps = ['edje',
@@ -58,6 +63,7 @@ edj_files = []
 
 if get_option('nls') == true
   subdir('po')
+  terminology_dependencies += cc.find_library('intl', required: false)
 endif
 
 foreach efl_dep: efl_deps