Add initial prototype.

3-mid/physics/implement/box2d/library/box2d_contrib.gpr

@@ -0,0 +1,27 @@
+with
+     "lace_shared";
+
+--library
+project Box2d_contrib
+is
+   for Languages       use ("C++");
+   for Source_Dirs     use ("../contrib/src/**");
+   for Object_Dir      use "build";
+   for Library_Dir     use "lib";
+   for Library_Ali_Dir use "objects";
+--   for Library_Name    use "box2d_contrib";
+
+   package Ide      renames Lace_shared.Ide;
+   package Builder  renames Lace_shared.Builder;
+   package Binder   renames Lace_shared.Binder;
+
+   package Naming is
+      for Spec_Suffix ("c++") use ".h";
+      for Body_Suffix ("c++") use ".cpp";
+   end Naming;
+
+   package Compiler is
+      for Default_Switches ("c++") use ("-g", "-I../../contrib/include");
+   end Compiler;
+
+end Box2d_contrib;

3-mid/physics/implement/box2d/library/box2d_thin.gpr

@@ -0,0 +1,23 @@
+with 
+     "box2d_thin_cxx",
+     "c_math_thin",
+     "swig",
+     "math",
+     "lace_shared";
+
+--library
+project Box2d_thin
+is
+   for Languages       use ("Ada");
+   for Source_Dirs     use ("../source/thin");
+   for Object_Dir      use "build";
+   for Library_Dir     use "lib";
+   for Library_Ali_Dir use "objects";
+--   for Library_Name    use "Box2d_thin";
+
+   package Ide      renames Lace_shared.Ide;
+   package Builder  renames Lace_shared.Builder;
+   package Compiler renames Lace_shared.Compiler;
+   package Binder   renames Lace_shared.Binder;
+
+end Box2d_thin;

3-mid/physics/implement/box2d/library/box2d_thin_c.gpr

@@ -0,0 +1,32 @@
+with
+     "c_math_thin_c",
+     "box2d_contrib",
+     "lace_shared";
+
+--library
+project Box2d_Thin_C
+is
+   for Languages       use ("c++");
+   for Source_Dirs     use ("../source/c");
+   for Object_Dir      use "build";
+   for Library_Dir     use "lib";
+   for Library_Ali_Dir use "objects";
+--   for Library_Name    use "box2d_thin_c";
+
+   package Naming is
+      for Spec_Suffix ("c++") use ".h";
+      for Body_Suffix ("c++") use ".cpp";
+   end Naming;
+
+   package Ide     renames Lace_shared.Ide;
+   package Builder renames Lace_shared.Builder;
+   package Binder  renames Lace_shared.Binder;
+
+   package Compiler is
+      for Default_Switches ("c++") use ("-g", 
+                                        "-Wno-return-type-c-linkage",
+                                        "-I../../../c_math/source/c",
+                                        "-I../../contrib/include");
+   end Compiler;
+
+end Box2d_Thin_C;

3-mid/physics/implement/box2d/library/box2d_thin_cxx.gpr

@@ -0,0 +1,31 @@
+with
+     "box2d_thin_c",
+     "lace_shared";
+
+--library
+project Box2d_Thin_Cxx
+is
+   for Languages       use ("C++");
+   for Source_Dirs     use ("../source/thin");
+   for Object_Dir      use "build";
+   for Library_Dir     use "lib";
+   for Library_Ali_Dir use "objects";
+--   for Library_Name    use "box2d_thin_cxx";
+
+   package Ide      renames Lace_shared.Ide;
+   package Builder  renames Lace_shared.Builder;
+   package Binder   renames Lace_shared.Binder;
+
+   package Naming is
+      for Spec_Suffix ("c++") use ".h";
+      for Body_Suffix ("c++") use ".cxx";
+   end Naming;
+
+   package Compiler is
+      for Default_Switches ("c++") use ("-g", 
+                                        "-fPIC",
+                                        "-I../../../c_math/source/c",
+                                        "-Wno-return-type-c-linkage");
+   end Compiler;
+
+end Box2d_Thin_Cxx;