[debian] Allow /usr/share as an installation directory. See #2890

genneko.ml

@@ -730,7 +730,14 @@ let generate_libs_init = function
 			var @b = if( @s == "Windows" )
 				@env("HAXEPATH") + "\\lib\\"
 				else try $loader.loadprim("std@file_contents",1)(@env("HOME")+"/.haxelib") + "/"
-				catch e if( @s == "Linux" ) "/usr/lib/haxe/lib/" else "/usr/local/lib/haxe/lib/";
+				catch e
+					if( @s == "Linux" )
+						if( $loader(loadprim("std@sys_exists",1))("/usr/lib/haxe/lib") )
+							"/usr/lib/haxe/lib"
+						else
+							"/usr/share/haxe/lib/"
+					else
+						"/usr/local/lib/haxe/lib/";
 			if( $loader.loadprim("std@sys_is64",0)() ) @s = @s + 64;
 			@s = @s + "/"
 		*)
@@ -752,7 +759,9 @@ let generate_libs_init = function
 						op "+" (call p (loadp "file_contents" 1) [op "+" (call p (ident p "@env") [str p "HOME"]) (str p "/.haxelib")]) (str p "/"),
 						"e",
 						(EIf (op "==" es (str p "Linux"),
-							str p "/usr/lib/haxe/lib/",
+							(EIf (call p (loadp "sys_exists" 1) [ str p "/usr/lib/haxe/lib" ],
+								str p "/usr/lib/haxe/lib/",
+								Some (str p "/usr/share/haxe/lib/")),p),
 							Some (str p "/usr/local/lib/haxe/lib/")
 						),p)
 					),p)

main.ml

@@ -954,7 +954,7 @@ try
 	with
 		Not_found ->
 			if Sys.os_type = "Unix" then
-				com.class_path <- ["/usr/lib/haxe/std/";"/usr/local/lib/haxe/std/";"/usr/lib/haxe/extraLibs/";"/usr/local/lib/haxe/extraLibs/";""]
+				com.class_path <- ["/usr/lib/haxe/std/";"/usr/share/haxe/std/";"/usr/local/lib/haxe/std/";"/usr/lib/haxe/extraLibs/";"/usr/local/lib/haxe/extraLibs/";""]
 			else
 				let base_path = normalize_path (get_real_path (try executable_path() with _ -> "./")) in
 				com.class_path <- [base_path ^ "std/";base_path ^ "extraLibs/";""]);