[mkbundle] Link against Objective-C runtime and Foundation framework on OSX (#5642)

Without it you get errors like the following in old-style mkbundle:

```
Undefined symbols for architecture x86_64:
  "_CFLocaleCopyCurrent", referenced from:
      _ves_icall_System_Globalization_CultureInfo_get_current_locale_name in libmono-2.0.a(libmonoruntimesgen_la-locales.o)
  "_CFLocaleGetIdentifier", referenced from:
      _ves_icall_System_Globalization_CultureInfo_get_current_locale_name in libmono-2.0.a(libmonoruntimesgen_la-locales.o)
  "_CFLocaleGetValue", referenced from:
      _ves_icall_System_Globalization_CultureInfo_get_current_locale_name in libmono-2.0.a(libmonoruntimesgen_la-locales.o)
  "_CFRelease", referenced from:
      _ves_icall_System_Globalization_CultureInfo_get_current_locale_name in libmono-2.0.a(libmonoruntimesgen_la-locales.o)
...
```

We actually documented this in the 3.4 release notes: http://www.mono-project.com/docs/about-mono/releases/3.4.0/#breaking-changes

However this means that you had to use the "-c" mkbundle option
to only generate the .c stub so you could pass those additional libraries.

diff --git a/mcs/tools/mkbundle/mkbundle.cs b/mcs/tools/mkbundle/mkbundle.cs
index 8680e0bbf8160f8f502a3705956eb7ebc06b88cb..d4ef1cbb5520e4f8c493fdcce14d61e2b21730f1 100755 (executable)
--- a/mcs/tools/mkbundle/mkbundle.cs
+++ b/mcs/tools/mkbundle/mkbundle.cs
@@ -1009,6 +1009,7 @@ void          mono_register_config_for_assembly (const char* assembly_name, cons
                        else
                        {
                                string zlib = (compress ? "-lz" : "");
+                               string objc = (style == "osx" ? "-framework CoreFoundation -lobjc" : "");
                                string debugging = "-g";
                                string cc = GetEnv("CC", "cc");
                                string cmd = null;
@@ -1022,16 +1023,16 @@ void          mono_register_config_for_assembly (const char* assembly_name, cons
                                                smonolib = "`pkg-config --variable=libdir mono-2`/libmono-2.0.a ";
                                        else
                                                smonolib = "-Wl,-Bstatic -lmono-2.0 -Wl,-Bdynamic ";
-                                       cmd = String.Format("{4} -o '{2}' -Wall `pkg-config --cflags mono-2` {0} {3} " +
+                                       cmd = String.Format("{4} -o '{2}' -Wall {5} `pkg-config --cflags mono-2` {0} {3} " +
                                                "`pkg-config --libs-only-L mono-2` " + smonolib +
                                                "`pkg-config --libs-only-l mono-2 | sed -e \"s/\\-lmono-2.0 //\"` {1}",
-                                               temp_c, temp_o, output, zlib, cc);
+                                               temp_c, temp_o, output, zlib, cc, objc);
                                }
                                else
                                {
 
-                                       cmd = String.Format("{4} " + debugging + " -o '{2}' -Wall {0} `pkg-config --cflags --libs mono-2` {3} {1}",
-                                               temp_c, temp_o, output, zlib, cc);
+                                       cmd = String.Format("{4} " + debugging + " -o '{2}' -Wall {5} {0} `pkg-config --cflags --libs mono-2` {3} {1}",
+                                               temp_c, temp_o, output, zlib, cc, objc);
                                }
                                Execute (cmd);
                        }