globe_3d.gpr

--  This is a GNAT, GCC or GNAT Programming Studio (GPS) project file
--  for the GLOBE_3D project.
--
--        GLOBE_3D Web site:   http://globe3d.sf.net/
--         GLOBE_3D Mirror:    https://github.com/zertovitch/globe-3d
--
--  Build me with "gnatmake -P globe_3d", "gprbuild -P globe_3d",
--  or open me with GNAT Studio.
--
--  This variant is a single project, which handles all sources, including
--  libraries (zip-ada, gid) which are also available as standalone projects
--  and made visible withthe Source_Dir_List variable below.
--
--  See "globe_3d_project_tree.gpr" for the other variant of
--  the GLOBE_3D project.

project GLOBE_3D is

   type G3D_OS_Kind is
      ("win32", "win64", "linux", "macosx");

   G3D_OS : G3D_OS_Kind := external ("G3D_OS", "win64");

   type G3D_Build_Mode_Type is
      ("debug",
       "fast",
       "small");

   G3D_Build_Mode : G3D_Build_Mode_Type := external ("G3D_Build_Mode", "debug");

   type G3D_Styles_Checks_Type is
      ("off",
       "level_1",
       "level_2");

   G3D_Styles_Checks : G3D_Styles_Checks_Type := external ("G3D_Styles_Checks", "off");

   Binder_Options := ("-Es");  --  -Es: Store tracebacks in exception occurrences, and enable symbolic tracebacks

   Common_Compiler_Options :=
     ("-gnatwa",
      "-fno-strict-aliasing");

   Style_Checks_1 := 
     ("-gnatyaknpr",   --  Style: check all casings: a:attribute, k:keywords, n:package Standard identifiers, p:pragma, r:identifier references
      "-gnatyO",       --  Style: check overriding indicators
      "-gnatyM120",    --  Style: check line length <= 100 characters
      "-gnatyx");      --  Style: check x:no extra parens

   Style_Checks_2 := 
     ("-gnatybfhiu",   --  Style: check b:no blanks at end of lines, f:no ff/vtabs, h: no htabs, i:if-then layout, u:no unnecessary blank lines
      "-gnatye",       --  Style: check e:end/exit labels present
      "-gnatytc",      --  Style: check t:token separation rules, c:comment format (two spaces)
      "-gnatwh");      --  Warnings switches (h:turn on warnings for hiding declarations)

   case G3D_Styles_Checks is
      when "off"   => null;
      when "level_1" => Common_Compiler_Options := Common_Compiler_Options & Style_Checks_1;
      when "level_2" => Common_Compiler_Options := Common_Compiler_Options & Style_Checks_1 & Style_Checks_2;
   end case;


   Debug_Options :=
     Common_Compiler_Options &
     "-gnato" &
     "-fstack-check" &
     "-g";

   case G3D_OS is
      when "win32" | "win64" =>
         Debug_Options := Debug_Options & "-fno-inline"
                                        & "-gnatVcdeimoprst";
--                                      & "-gnatVf"             -- (2016) turned off floating point validity check, seems to give false positives on a scalar product for collision detection
      when others =>
         Debug_Options := Debug_Options & "-gnatVa";
   end case;

   Fast_Options :=
     Common_Compiler_Options & 
       ("-O2", 
        "-gnatn",
        "-gnatp",
        "-funroll-loops",
        "-fpeel-loops",
        "-ftracer",
        "-funswitch-loops",
        "-fweb",
        "-frename-registers"); 

   Small_Options :=
     Common_Compiler_Options & 
       ("-Os",
        "-gnatp",
        "-fno-inline",
        "-ffunction-sections");

   Compiler_Options := ();

   case G3D_Build_Mode 
   is
      when "debug" =>
         Compiler_Options := Debug_Options;

      when "fast" =>
         case G3D_OS
         is
            when "linux"  =>
               Compiler_Options := 
                  Fast_Options &
                  "-fomit-frame-pointer";
            when "win32" | "win64" =>
               Compiler_Options := 
                  Fast_Options &
                    ("-fipa-cp-clone",
                     "-fgcse-after-reload",
                     "-ftree-vectorize",
                     "-mfpmath=sse",
                     "-msse3");
            when others =>
               Compiler_Options := Fast_Options;
         end case;

      when "small" =>
         case G3D_OS
         is
            when "linux"  =>
               Compiler_Options :=
                 Small_Options & "-fdata-sections";
            when others  =>
               Compiler_Options := Small_Options;
         end case;
   end case;

   case G3D_OS
   is
      when "macosx" =>
         Compiler_Options :=
           Compiler_Options &
             ("-gnatf", 
              "-gnatE",
              "-gnatVcfimorst",
              "-gnatyhiknp");
      when "linux" =>
         Binder_Options :=
           Binder_Options & "-static";

      when others =>
         null;
   end case;

   G3D_GNAT_Obj_Suffix := external ("G3D_Build_Mode", "debug");

   for Library_Name    use "globe3d";
   for Library_Dir     use "lib/gnat_" & G3D_GNAT_Obj_Suffix;
   for Library_Ali_Dir use "lib/gnat_" & G3D_GNAT_Obj_Suffix;
   for Object_Dir      use "obj/gnat_" & G3D_GNAT_Obj_Suffix;

   Source_Dir_List :=
     ("bindings",
      "src",
      "src/culler",
      "src/gaming",
      "src/gl",
      "src/models",
      "src/objects",
      --  Here are external projects's sources:
      "src/gid",
      "src/unzip");

   case G3D_OS is
      when "win64"  => for Source_Dirs use Source_Dir_List & ("bindings/win32");
      when others   => for Source_Dirs use Source_Dir_List & ("bindings/" & external ("G3D_OS", "win32"));
   end case;

   package Ide is
      case G3D_OS
      is
         when "linux"            =>   for Default_Switches ("adacontrol") use ("-Ftgnat_short");
         when "win32" | "win64"  =>   for Default_Switches ("adacontrol") use ("-F", "gnat_short");
         when "macosx"           =>   for Default_Switches ("adacontrol") use ();
      end case;
   end Ide;

   package Builder is
      --   "If -j0 is used, then the maximum number of simultaneous compilation
      --    jobs is the number of core processors on the platform."
      for Default_Switches ("ada") use ("-C", "-j0");

      case G3D_Build_Mode 
      is
         when "debug" =>   for Global_Configuration_Pragmas use "obj/debug.pra";
         when "fast"  =>   null;
         when "small" =>   null;
      end case;
   end Builder;

   package Compiler is
      for Default_Switches ("ada") use Compiler_Options;
   end Compiler;

   package Binder is
      for Default_Switches ("ada") use Binder_Options;
   end Binder;

   package Linker is
      case G3D_OS
      is
         when "linux"  =>   for Linker_Options use ("-g", "-lGL", "-lGLU", "-lglut");
         when "win32"  =>   for Linker_Options use ("-g", "-Wl,--gc-sections", "obj/libwin32/glee.o", "-lopengl32", "-lglu32", "-lfreeglut", "-Lobj/libwin32", "-Xlinker", "--stack=0x40000000,0x400000");
         when "win64"  =>   for Linker_Options use ("-g", "-Wl,--gc-sections", "obj/libwin64/glee.o", "-lopengl32", "-lglu32", "-lfreeglut", "-Lobj/libwin64", "-Xlinker", "--stack=0x40000000,0x400000");
         when "macosx" =>   for Linker_Options use ("-g", "-bind_at_load", "-framework", "/GLUT", "-framework", "/OpenGL", "-lm");
      end case;
   end Linker;

end GLOBE_3D;