Sharing tips for GNAT project files

Hello,

I'm posting here my default project file, so interested people can look
at it and suggest improvements.

With this project file I can build a set of files as a library (static
or dynamic), which will compile all source files, or pulling in only the
 "withed" files. It also includes several optimization settings.

--8<--

project Template is

   type Yes_No           is ("Yes",     "No");

   for Languages use ("Ada");
   -- , "C", "C++");

   for Source_Dirs use ("src");
   for Object_Dir  use "obj";
   for Exec_Dir    use "obj";

   Lib_Name    := "template";
   Lib_Version := "20070102";

   type Build_Type   is ("Debug", "Release", "No_Options", "Profile");
   type Linking_Type is ("Dependencies", "Static_Library",
"Dynamic_Library");

   Build : Build_Type   := external ("Template_Build", "Debug");
   Link  : Linking_Type := External ("Template_Link",  "Dependencies");

   case Link is
      when "Dependencies" =>
         null;
      when "Static_Library" =>
         for Library_Dir     use "libstatic";
         for Library_Name    use Lib_Name;
         for Library_Kind    use "Static";
         for Library_Version use Lib_Name & ".a." & Lib_Version;
      when "Dynamic_Library" =>
         for Library_Dir     use "libdynamic";
         for Library_Name    use Lib_Name;
         for Library_Kind    use "Dynamic";
         for Library_Version use Lib_Name & ".so." & Lib_Version;
   end case;

   Include_Test : Yes_No := external ("Template_Include_Test", "Yes");

   case Include_Test is
      when "Yes" => for Source_Dirs use project'Source_Dirs & "test";
      when "No"  => null;
   end case;

   package Ide is
      for Vcs_Kind use "Subversion";
   end Ide;

   package Compiler is
      for Default_Switches ("C")   use ("-g", "-Wall", "-O2");
      for Default_Switches ("C++") use ("-g", "-Wall", "-O2");
      for Default_Switches ("Ada") use
        ("-g", "-gnatf", "-gnat05",
         "-gnatwcfjklmopruvz", "-gnatyacehikn", "-gnatqQ");

      case Build is
         when "Profile" =>
            for Default_Switches ("Ada") use
              Compiler'Default_Switches ("Ada") &
              ("-O2", "-gnato", "-fstack-check", "-gnata", "-gnatpg");
         when "Debug" =>
            for Default_Switches ("Ada") use
              Compiler'Default_Switches ("Ada") &
              ("-O2", "-gnato", "-fstack-check", "-gnata");
         when "Release" =>
            for Default_Switches ("Ada") use
              Compiler'Default_Switches ("Ada") &
              ("-O3", "-gnatn", "-gnatN");
            for Default_Switches ("C")   use
              Compiler'Default_Switches ("C")   & ("-O3");
            for Default_Switches ("C++") use
              Compiler'Default_Switches ("C")   & ("-O3");
         when "No_Options" =>
            for Default_Switches ("Ada") use ("-gnat05");
            --  Deliberately override default switches not to have any!
      end case;
   end Compiler;

   package Binder is
      for Default_Switches ("Ada") use ("-E", "-g"); -- , "-r");
      -- "Show restrictions
   end Binder;

   package Linker is
      for Default_Switches ("Ada") use ("-g", "-Wl,--gc-sections");
      for Default_Switches ("C")   use ("-g");
      for Default_Switches ("C++") use ("-g");
   end Linker;

   package Builder is
      for Default_Switches ("Ada") use ("-g");
      -- , "-j2"); -- Two files at a time
   end Builder;

   package Pretty_Printer is
      for Default_Switches ("Ada") use ("-A1", "-A2", "-A3", "-A4");
   end Pretty_Printer;

   package Naming is
      for Specification_Suffix  ("C") use ".h";
      for Implementation_Suffix ("C") use ".c";
      for Specification_Suffix  ("C++") use ".hh";
      for Implementation_Suffix ("C++") use ".cc";
      for Specification_Suffix  ("Changelog") use "changelog";
      for Specification_Suffix  ("Project file") use ".gpr";
      for Specification_Suffix  ("Python") use ".py";
   end Naming;

end Template;