Re: SDL Ada package fails to compile on Mac, gnat 13.1, missing "SDL2_ttf/SDL_ttf.h"

["Luke A. Guest" <laguest@archeia.com>]

On 04/07/2023 00:01, Kenneth Wolcott wrote:
> ./gen/release/tools/gen_keyboard > gen/src/sdl-events-keyboards.ads
> gprbuild -p -gnat2012 -XSDL_MODE=release -XSDL_PLATFORM=macos_ports \
> 		-Psdlada.gpr
> sdlada.gpr:16:07: undefined attribute "default_swiches"
> sdlada.gpr:17:03: ";" after declarative items expected
> sdlada.gpr:26:09: a variable cannot be declared for the first time here
> sdlada.gpr:26:23: unknown variable "C_Switches"
> sdlada.gpr:34:08: undefined attribute "languages"
> sdlada.gpr:35:08: undefined attribute "source_dirs"
> sdlada.gpr:42:08: undefined attribute "library_name"
> sdlada.gpr:43:08: undefined attribute "object_dir"
> sdlada.gpr:44:08: undefined attribute "library_dir"
> sdlada.gpr:45:08: undefined attribute "library_kind"
> sdlada.gpr:47:04: a package cannot be declared here
> sdlada.gpr:79:04: a package cannot be declared here
> sdlada.gpr:108:05: expected "builder"
> gprbuild: "sdlada.gpr" processing failed
> make: *** [lib/libadasdl.a] Error 5
> 
> Ken

I don't know what's going on about, here's the gpr I have:

library project SDLAda is
    type Platform_Type is ("linux",
                           "bsd",
                           "windows",
                           "macosx",
                           "macos_homebrew",
                           "macos_ports",
                           "ios",
                           "android");
    type Mode_Type is ("debug", "release");

    Platform : Platform_Type := external ("SDL_PLATFORM", "linux");
    Mode     : Mode_Type     := external ("SDL_MODE", "debug");

    package Builder is
       for Default_Switches ("Ada") use ("-gnat2012", "-gnata");
    end Builder;

    Source_Platform := "";

    case Platform is
       when "macos_homebrew" =>
          Source_Platform := "../../src/macosx";

       when others =>
          Source_Platform := "../../src/" & Platform;
    end case;

    for Languages    use ("Ada", "C");
    for Source_Dirs  use ("../../src", Source_Platform, "gen/src/",

                          --  For SDL.Image.
                          "../../src/image",

                          --  For SDL.TTF.
                          "../../src/ttf");
    for Library_Name use "sdlada";
    for Object_Dir   use "gen/" & Mode & "/lib/.obj";
    for Library_Dir  use "gen/" & Mode &  "/lib";
    for Library_Kind use "static";

    package Compiler is
       Common_Switches := ("-ffunction-sections", "-fdata-sections");
       C_Switches      := ();
       Ada_Switches    := ("-gnat2012", "-gnata", "-gnato", "-gnatE", 
"-gnatwa",
                           "-gnaty", "-gnaty-s", "-gnatyO", 
"-gnatyM120", "-gnatyx");

       case Mode is
          when "debug" =>
             Common_Switches := Common_Switches  & ("-O0", "-g", "-ggdb");

          when "release" =>
             Common_Switches := Common_Switches & ("-O2");
       end case;

       --  These flags require checking on all platforms as they're 
taken directly from sdl2-config.
       case Platform is
          when "linux" | "bsd" | "android" | "windows" =>
             C_Switches   := C_Switches & ("-I/usr/include/SDL2", 
"-D_REENTRANT");

          when "macos_homebrew" =>
             C_Switches   := C_Switches & ("-DSDL_HOMEBREW",
                                           "-I/usr/local/include",
                                           "-D_REENTRANT");

          when "macos_ports" =>
             C_Switches   := C_Switches & ("-DSDL_MACPORTS",
                                           "-I/opt/local/include",
                                           "-D_THREAD_SAFE");

          when others =>
             null;
       end case;

       for Default_Switches ("C") use Common_Switches & C_Switches;
       for Default_Switches ("Ada") use Common_Switches & Ada_Switches;
    end Compiler;

    package Linker is
       Linker_Switches := ();

       case Platform is
          when "linux" | "bsd" | "android" | "windows" =>
             Linker_Switches := Linker_Switches & ("-lSDL2",
                                                   "-lSDL2_ttf",
                                                   "-lSDL2_image",
                                                   "-L/usr/lib64");

          when "macos_homebrew" =>
             Linker_Switches := Linker_Switches & ("-lSDL2",
                                                   "-lSDL2_ttf",
                                                   "-lSDL2_image",
                                                   "-L/usr/local/lib");

          when "macos_ports" =>
             Linker_Switches := Linker_Switches & ("-lSDL2",
                                                   "-lSDL2_ttf",
                                                   "-lSDL2_image",
                                                   "-L/opt/local/lib");

          when others =>
             null;
       end case;

       for Switches ("Ada") use Linker_Switches;
    end Linker;
end SDLAda;