VLC @3.0.8: error: The document “(null)” requires Xcode 8.0 or later

[ryandesign (Ryan Carsten Schmidt)]

​VLC fails to build at least on Yosemite:

/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_multimedia_VLC/VLC/work/vlc-3.0.8/modules/gui/macosx/UI/About.xib: error: The document “(null)” requires Xcode 8.0 or later.
    Recovery Suggestion: This version does not support documents saved in the Xcode 8 format. Open this document with Xcode 8.0 or later.

The latest version of Xcode that is compatible with Yosemite is 7.2.1.

The port should error out early (using known_fail yes and a pre-fetch block advising the user of the problem) on systems that can't build it.

[RJVB (René Bertin)]

If "3.current" no longer builds on 10.10 there are 2 options:

• ship an earlier 3.x for 10.10 (but which?)
• use the "fix" also used for 10.9 and earlier:

diff --git a/multimedia/VLC/Portfile b/multimedia/VLC/Portfile
index 8bed6fa85961eeaa67d332b2117ff540be743cf3..721a2ea19ed9c562a5a9044dad1384c73a1a4fe7 100644
--- a/multimedia/VLC/Portfile
+++ b/multimedia/VLC/Portfile
@@ -38,7 +38,7 @@ subport lib${name} {
 }
 
 if {${subport} eq ${name}} {
-    if {${os.platform} eq "darwin" && ${os.major} < 14} {
+    if {${os.platform} eq "darwin" && ${os.major} < 15} {
         replaced_by VLC2
         PortGroup   obsolete 1.0
         # given the Portfile design it's easier to shunt the entire patch phase