Make so many libraries as modules in the SFML library

The problem with this approach is that the list of sources has to be
specified and that the documentation is not generated by gnatdoc, so it is
left in this experimental branch, until a solution is found.

See issue #6

Makefile

@@ -4,4 +4,4 @@ all:
 	gprbuild -j0 -P asfml.gpr
 
 doc:
-	gnatdoc -P asfml.gpr
+	gnatdoc -P asfml_doc.gpr

asfml.gpr

@@ -1,40 +1,17 @@
+aggregate library project ASFML is
 
-library project ASFML is
-
-   type T_OS is ("Windows_NT", "Linux");
-   V_OS : T_OS := external ("OS", "Linux");
-
-   for Languages use ("Ada");
-
-   for Create_Missing_Dirs use "True";
-
-   for Source_Dirs use ("include");
-   for Object_Dir  use "obj";
+   for Project_Files use
+      ("asfml_system.gpr",
+       "asfml_audio.gpr",
+       "asfml_window.gpr",
+       "asfml_graphics.gpr");
 
    for Library_Name use "asfml";
 
    for Library_Dir  use "lib";
    for Library_ALI_Dir use "lib";
    for Library_Kind use "static";
 
-
-  package Linker is
-    case V_OS is
-      when "Windows_NT" =>
-        for Linker_Options use
-           ("-LD:\Libraries\CSFML-2.5\lib\gcc",
-            "-lcsfml-system", "-lcsfml-audio", "-lcsfml-network",
-            "-lcsfml-audio", "-lcsfml-graphics", "-lcsfml-window",
-            "-lasfml");
-      when others =>
-        for Linker_Options use
-           ("-lcsfml-system", "-lcsfml-audio", "-lcsfml-network",
-            "-lcsfml-audio", "-lcsfml-graphics", "-lcsfml-window",
-            "-lasfml");
-    end case;
-  end Linker;
-
-
   package Documentation is
     for Documentation_Dir use "doc";
     for Doc_Pattern use "^/ |^/< ";

asfml_audio.gpr

@@ -0,0 +1,60 @@
+with "asfml_system.gpr";
+
+library project ASFML_Audio is
+
+   type T_OS is ("Windows_NT", "Linux");
+   V_OS : T_OS := external ("OS", "Linux");
+
+   for Languages use ("Ada");
+
+   for Create_Missing_Dirs use "True";
+
+   for Source_Dirs use ("include");
+   for Source_Files use
+       ("sf-audio.ads",
+        "sf-audio-listener.ads",
+        "sf-audio-music.adb",
+        "sf-audio-music.ads",
+        "sf-audio-sound.ads",
+		"sf-audio-soundbuffer.adb",
+		"sf-audio-soundbuffer.ads",
+		"sf-audio-soundbufferrecorder.adb",
+		"sf-audio-soundbufferrecorder.ads",
+		"sf-audio-soundrecorder.adb",
+		"sf-audio-soundrecorder.ads",
+		"sf-audio-soundstatus.ads",
+		"sf-audio-soundstream.ads",
+		"sf-audio-types.ads");
+   for Object_Dir  use "obj";
+
+   for Library_Name use "asfml-audio";
+
+   for Library_Dir use "lib/audio";
+   for Library_ALI_Dir use "lib/audio";
+   for Library_Kind use "static";
+
+
+  package Linker is
+    case V_OS is
+      when "Windows_NT" =>
+        for Linker_Options use
+           ("-LD:\Libraries\CSFML-2.5\lib\gcc",
+            "-lcsfml-audio",
+            "-lasfml-audio");
+      when others =>
+        for Linker_Options use
+           ("-lcsfml-audio",
+            "-lasfml-audio");
+    end case;
+  end Linker;
+
+
+  package Documentation is
+    for Documentation_Dir use "doc";
+    for Doc_Pattern use "^/ |^/< ";
+    --  This considers comments beginning with "--/ " to be documentation
+    for Custom_Tags_Definition use "tools/sfml-doc-tags.py";
+    --  GNATdoc loads provided file on startup to process custom tags
+  end Documentation;
+
+end ASFML_Audio;

asfml_doc.gpr

@@ -0,0 +1,27 @@
+-- This project is only for generating documentation, not for building.
+-- When using gnatdoc (Ubuntu 18.04) with asfml.gpr there are errors.
+
+library project ASFML_doc is
+
+   for Languages use ("Ada");
+
+   for Create_Missing_Dirs use "True";
+
+   for Source_Dirs use ("include");
+   for Object_Dir  use "obj";
+
+   for Library_Name use "asfml";
+
+   for Library_Dir use "lib";
+   for Library_ALI_Dir use "lib";
+   for Library_Kind use "static";
+
+  package Documentation is
+    for Documentation_Dir use "doc";
+    for Doc_Pattern use "^/ |^/< ";
+    --  This considers comments beginning with "--/ " to be documentation
+    for Custom_Tags_Definition use "tools/sfml-doc-tags.py";
+    --  GNATdoc loads provided file on startup to process custom tags
+  end Documentation;
+
+end ASFML_doc;

asfml_graphics.gpr

@@ -0,0 +1,79 @@
+with "asfml_system.gpr";
+with "asfml_window.gpr";
+
+library project ASFML_Graphics is
+
+   type T_OS is ("Windows_NT", "Linux");
+   V_OS : T_OS := external ("OS", "Linux");
+
+   for Languages use ("Ada");
+
+   for Create_Missing_Dirs use "True";
+
+   for Source_Dirs use ("include");
+   for Source_Files use
+       ("sf-graphics.ads",
+        "sf-graphics-blendmode.ads",
+        "sf-graphics-circleshape.ads",
+        "sf-graphics-color.ads",
+        "sf-graphics-convexshape.ads",
+        "sf-graphics-font.adb",
+        "sf-graphics-font.ads",
+        "sf-graphics-fontinfo.ads",
+        "sf-graphics-glsl.ads",
+        "sf-graphics-glyph.ads",
+        "sf-graphics-image.adb",
+        "sf-graphics-image.ads",
+        "sf-graphics-primitivetype.ads",
+        "sf-graphics-rect.ads",
+        "sf-graphics-rectangleshape.ads",
+        "sf-graphics-renderstates.ads",
+        "sf-graphics-rendertexture.ads",
+        "sf-graphics-renderwindow.adb",
+        "sf-graphics-renderwindow.ads",
+        "sf-graphics-shader.ads",
+        "sf-graphics-shape.ads",
+        "sf-graphics-sprite.ads",
+        "sf-graphics-text.adb",
+        "sf-graphics-text.ads",
+        "sf-graphics-texture.adb",
+        "sf-graphics-texture.ads",
+        "sf-graphics-transformable.ads",
+        "sf-graphics-transform.ads",
+        "sf-graphics-types.ads",
+        "sf-graphics-vertex.ads",
+        "sf-graphics-vertexarray.ads",
+        "sf-graphics-view.ads");
+   for Object_Dir  use "obj";
+
+   for Library_Name use "asfml-graphics";
+
+   for Library_Dir use "lib/graphics";
+   for Library_ALI_Dir use "lib/graphics";
+   for Library_Kind use "static";
+
+
+  package Linker is
+    case V_OS is
+      when "Windows_NT" =>
+        for Linker_Options use
+           ("-LD:\Libraries\CSFML-2.5\lib\gcc",
+            "-lcsfml-graphics",
+            "-lasfml-graphics");
+      when others =>
+        for Linker_Options use
+           ("-lcsfml-graphics",
+            "-lasfml-graphics");
+    end case;
+  end Linker;
+
+
+  package Documentation is
+    for Documentation_Dir use "doc";
+    for Doc_Pattern use "^/ |^/< ";
+    --  This considers comments beginning with "--/ " to be documentation
+    for Custom_Tags_Definition use "tools/sfml-doc-tags.py";
+    --  GNATdoc loads provided file on startup to process custom tags
+  end Documentation;
+
+end ASFML_Graphics;

asfml_network.gpr

@@ -0,0 +1,61 @@
+with "asfml_system.gpr";
+
+library project ASFML_Network is
+
+   type T_OS is ("Windows_NT", "Linux");
+   V_OS : T_OS := external ("OS", "Linux");
+
+   for Languages use ("Ada");
+
+   for Create_Missing_Dirs use "True";
+
+   for Source_Dirs use ("include");
+   for Source_Files use
+       ("sf-network.ads",
+        "sf-network-ftp.adb",
+        "sf-network-ftp.ads",
+        "sf-network-http.adb",
+        "sf-network-http.ads",
+        "sf-network-ipaddress.adb",
+        "sf-network-ipaddress.ads",
+        "sf-network-packet.adb",
+        "sf-network-packet.ads",
+        "sf-network-socketselector.ads",
+        "sf-network-socketstatus.ads",
+        "sf-network-tcplistener.ads",
+        "sf-network-tcpsocket.ads",
+        "sf-network-types.ads",
+        "sf-network-udpsocket.ads");
+   for Object_Dir  use "obj";
+
+   for Library_Name use "asfml-network";
+
+   for Library_Dir use "lib";
+   for Library_ALI_Dir use "lib";
+   for Library_Kind use "static";
+
+
+  package Linker is
+    case V_OS is
+      when "Windows_NT" =>
+        for Linker_Options use
+           ("-LD:\Libraries\CSFML-2.5\lib\gcc",
+            "-lcsfml-network",
+            "-lasfml-network");
+      when others =>
+        for Linker_Options use
+           ("-lcsfml-network",
+            "-lasfml-network");
+    end case;
+  end Linker;
+
+
+  package Documentation is
+    for Documentation_Dir use "doc";
+    for Doc_Pattern use "^/ |^/< ";
+    --  This considers comments beginning with "--/ " to be documentation
+    for Custom_Tags_Definition use "tools/sfml-doc-tags.py";
+    --  GNATdoc loads provided file on startup to process custom tags
+  end Documentation;
+
+end ASFML_Network;

asfml_system.gpr

@@ -0,0 +1,58 @@
+
+library project ASFML_System is
+
+   type T_OS is ("Windows_NT", "Linux");
+   V_OS : T_OS := external ("OS", "Linux");
+
+   for Languages use ("Ada");
+
+   for Create_Missing_Dirs use "True";
+
+   for Source_Dirs use ("include");
+   for Source_Files use
+       ("sf.ads",
+        "sf-config.ads",
+        "sf-system.ads",
+        "sf-system-clock.ads",
+        "sf-system-inputstream.ads",
+        "sf-system-mutex.ads",
+        "sf-system-sleep.adb",
+        "sf-system-sleep.ads",
+        "sf-system-thread.ads",
+        "sf-system-time.ads",
+        "sf-system-types.ads",
+        "sf-system-vector2.ads",
+        "sf-system-vector3.ads");
+   for Object_Dir  use "obj";
+
+   for Library_Name use "asfml-system";
+
+   for Library_Dir  use "lib/system";
+   for Library_ALI_Dir use "lib/system";
+   for Library_Kind use "static";
+
+
+  package Linker is
+    case V_OS is
+      when "Windows_NT" =>
+        for Linker_Options use
+           ("-LD:\Libraries\CSFML-2.5\lib\gcc",
+            "-lcsfml-system",
+            "-lasfml-system");
+      when others =>
+        for Linker_Options use
+           ("-lcsfml-system",
+            "-lasfml-system");
+    end case;
+  end Linker;
+
+
+  package Documentation is
+    for Documentation_Dir use "doc";
+    for Doc_Pattern use "^/ |^/< ";
+    --  This considers comments beginning with "--/ " to be documentation
+    for Custom_Tags_Definition use "tools/sfml-doc-tags.py";
+    --  GNATdoc loads provided file on startup to process custom tags
+  end Documentation;
+
+end ASFML_System;