gprbuild-2017-gentoo.patch

--- gprbuild-2017/gpr/gpr.gpr.old	2017-05-27 20:59:07.061135892 +0200
+++ gprbuild-2017/gpr/gpr.gpr	2017-05-27 20:59:38.022638398 +0200
@@ -67,6 +67,7 @@
             for Switches ("gpr*.ad?") use
               Compiler'Default_Switches ("Ada") & ("-g1");
       end case;
+      for Driver ("C") use External ("CC", "gcc");
    end Compiler;
 
 end GPR;
--- gprbuild-17.0/src/gprbuild-post_compile.adb.old	2017-05-18 14:17:06.114797015 +0200
+++ gprbuild-17.0/src/gprbuild-post_compile.adb	2017-05-18 14:18:55.466956852 +0200
@@ -4744,7 +4744,9 @@
                                  No_Create => Proj.Is_Aggregated);
                            end if;
 
-                           Shared_Libs := not Is_Static (Proj.Proj);
+                           if not Is_Static (Proj.Proj) then
+                              Shared_Libs := True;
+                           end if;
 
                         end if;
                      end if;