ENH: add support for the Syllable OS (http://www.syllable.org)

major issues:
-access() doesn't return false for an empty string (#ifdefed in cmake)
-dlopen() doesn't return 0 on failure (#ifdefed in cmake and fixed now in Syllable)
-the kwsys and Bootstrap tests fail with timeout due to the fact that I'm doing all that in qemu, which is quite slow
-RPATH is now supported, so without modifying the test adapting DLL_PATH in Syllable is required for the tests to succeed
-the Plugin test fails with an undefined reference to example_exe_function() in example_mod_1, it seems this isn't supported under Syllable

Alex

Source/kwsys/SystemTools.cxx

@@ -818,6 +818,14 @@ bool SystemTools::FileExists(const char* filename)
 #ifndef R_OK
 # define R_OK 04
 #endif
+
+#ifdef __SYLLABLE__
+  if ((filename !=0) && (*filename == 0))
+    {
+    return false;
+  }
+#endif
+
   if ( access(filename, R_OK) != 0 )
     {
     return false;

Source/kwsys/testDynamicLoader.cxx

@@ -97,17 +97,22 @@ int testDynamicLoader(int argc, char *argv[])
 #elif defined(__BEOS__)
   disable_debugger(1);
 #endif
-  int res;
+  int res = 0;
   if( argc == 3 )
     {
     // User specify a libname and symbol to check.
     res = TestDynamicLoader(argv[1], argv[2],1,1,1);
     return res;
     }
+
+// dlopen() on Syllable before 11/22/2007 doesn't return 0 on error
+#ifndef __SYLLABLE__
   // Make sure that inexistant lib is giving correct result
-  res = TestDynamicLoader("azerty_", "foo_bar",0,0,0);
+  res += TestDynamicLoader("azerty_", "foo_bar",0,0,0);
   // Make sure that random binary file cannnot be assimilated as dylib
   res += TestDynamicLoader(TEST_SYSTEMTOOLS_BIN_FILE, "wp",0,0,0);
+#endif
+
 #ifdef __linux__
   // This one is actually fun to test, since dlopen is by default loaded...wonder why :)
   res += TestDynamicLoader("foobar.lib", "dlopen",0,1,0);