Fix Library_Options for macOS.

[Blady-Com]

Hello, small fix for macOS build, HTH Pascal.

[CLAassistant]

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[Blady-Com]

It seems that Library_Options is only desired by gprbuild for relocatable build and not for static nor static-pic builds, so I made the following changes:

--- ./sqlite/gnatcoll_sqlite.gpr.0	2019-08-15 09:31:09.000000000 +0200
+++ ./sqlite/gnatcoll_sqlite.gpr	2019-08-15 10:08:56.000000000 +0200
@@ -51,20 +51,19 @@
    case Library_Type is
       when "relocatable" =>
          for Library_Interface use ("gnatcoll.sql.sqlite");
+         case OS is
+            when "windows" =>
+               Lib_Opt_Ext := ("-lsqlite3");
+            when "osx" =>
+               Lib_Opt_Ext := ("-lsqlite3");
+            when others =>
+               Thread_Lib := ("-lpthread");
+               Lib_Opt_Ext := ("-lsqlite3") & Thread_Lib;
+         end case;
       when others =>
          null;
    end case;
 
-   case OS is
-      when "windows" =>
-         Lib_Opt_Ext := ("-lsqlite3");
-      when "osx" =>
-         null;
-      when others =>
-         Thread_Lib := ("-lpthread");
-         Lib_Opt_Ext := ("-lsqlite3") & Thread_Lib;
-   end case;
-
    type Sqlite_Dep_Kind is ("embedded", "external");
    Sqlite_Dep : Sqlite_Dep_Kind := External ("GNATCOLL_SQLITE", "embedded");

HTH, Pascal