Generify source code

Previously we would fail in some parts of the code if we did not have a
premade configuration, now we use any code that was marked as Linux, BSD and
Solaris as our basis in order to support building unknown Unix systems.

cde/programs/ttsnoop/tt_c++.h

@@ -29,12 +29,8 @@
 #ifndef TT_CXX_H
 #define TT_CXX_H
 
-#if defined(__linux__) || defined(CSRG_BASED) || defined(sun)
 #include <iostream>
 using namespace std;
-#else
-#include <iostream.h>
-#endif
 
 #include <Tt/tt_c.h>
 

cde/programs/ttsnoop/ttsnoop.C.src

@@ -190,12 +190,10 @@ signalHandler(
 	}
 }
 
-#if defined(SVR4) || defined(aix) || defined(__linux__) || defined(CSRG_BASED)
 #if !defined(SIG_PF)
 typedef void (*sig_pf_t)(int);
 #define SIG_PF sig_pf_t
 #endif
-#endif
 
 int
 _tt_sigset(