+ fix and enable compilation of libjack for Win32 and Win64

packages/libjack/fpmake.pp

@@ -24,7 +24,7 @@ begin
     P.Email := '';
     P.Description := 'Headers for the JACK Audio Connection Kit library';
     P.NeedLibC:= true;  // true for headers that indirectly link to libc?
-    P.OSes := AllUnixOSes-[qnx];
+    P.OSes := AllUnixOSes+[win32,win64]-[qnx];
     P.SourcePath.Add('src');
     P.IncludePath.Add('src');
 

packages/libjack/src/jack.pp

@@ -34,7 +34,13 @@ uses
 {$ENDIF FPC_DOTTEDUNITS}
 
 const
+{$if defined(win32)}
+  libjack = 'libjack';
+{$else if defined(win64)}
+  libjack = 'libjack64';
+{$else}
   libjack = 'jack';
+{$endif}
 
 type
   uint64_t = System.UInt64;

packages/libjack/src/weakmacros.inc

@@ -40,7 +40,7 @@
 {$define JACK_NET_OPTIONAL_WEAK_EXPORT := external libjacknet}
 {$define JACK_NET_OPTIONAL_WEAK_DEPRECATED_EXPORT := external libjacknet; deprecated}
 
-{$if defined(haiku) or defined(aix)}
+{$if defined(haiku) or defined(aix) or defined(win32) or defined(win64)}
   // target does not support weakexternal
   {$define JACK_WEAK_EXPORT := external libjack}
 {$else}