Fix reported build errors with gcc 4.3

Add missing includes to cstring et al.

elab_net.cc

@@ -28,6 +28,7 @@
 # include  "compiler.h"
 
 # include  <iostream>
+# include  <cstring>
 
 /*
  * This is a state flag that determines whether an elaborate_net must

elab_scope.cc

@@ -24,6 +24,7 @@
 # include  "compiler.h"
 # include  <iostream>
 # include  <stdio.h>
+# include  <cstring>
 
 /*
  * Elaboration happens in two passes, generally. The first scans the

elab_sig.cc

@@ -23,6 +23,7 @@
 # include "config.h"
 
 # include  <iostream>
+# include  <cstdlib>
 
 # include  "Module.h"
 # include  "PExpr.h"

emit.cc

@@ -32,6 +32,7 @@
 # include  "netlist.h"
 # include  <typeinfo>
 # include  <cassert>
+# include  <cstring>
 
 bool NetNode::emit_node(struct target_t*tgt) const
 {

load_module.cc

@@ -31,6 +31,8 @@
 # include  <dirent.h>
 # include  <ctype.h>
 # include  <assert.h>
+# include  <cstdlib>
+# include  <cstring>
 
 /*
  * The module library items are maps of key names to file name within

net_design.cc

@@ -33,6 +33,7 @@
 # include  "util.h"
 # include  "compiler.h"
 # include  <sstream>
+# include  <cstring>
 
 Design:: Design()
 : errors(0), nodes_(0), procs_(0), lcounter_(0)

net_link.cc

@@ -27,6 +27,7 @@
 # include  "netlist.h"
 # include  <sstream>
 # include  <string>
+# include  <cstring>
 # include  <typeinfo>
 #ifdef HAVE_MALLOC_H
 # include  <malloc.h>

net_scope.cc

@@ -25,6 +25,7 @@
 
 # include  "netlist.h"
 # include  <sstream>
+# include  <cstring>
 
 /*
  * The NetScope class keeps a scope tree organized. Each node of the

pform.h

@@ -37,6 +37,8 @@
 # include  <string>
 # include  <list>
 # include  <stdio.h>
+# include  <cstring>
+# include  <cstdlib>
 
 /*
  * These classes implement the parsed form (P-form for short) of the

synth2.cc

@@ -28,6 +28,7 @@
 #include <cassert>
 #include "NetLatch.h"
 #include <climits>
+#include <cstdlib>
 
 #include <new> // standard operator new
 using std::bad_alloc;

sys_funcs.cc

@@ -23,6 +23,8 @@
 # include  "config.h"
 # include  "compiler.h"
 # include  <stdio.h>
+# include  <cstdlib>
+# include  <cstring>
 
 /*
  * Manage the information about system functions. This information is

t-dll-expr.cc

@@ -30,7 +30,8 @@
 #ifdef HAVE_MALLOC_H
 # include  <malloc.h>
 #endif
-# include  <stdlib.h>
+# include  <cstdlib>
+# include  <cstring>
 
 /*
  * This is a little convenience function for converting a NetExpr

t-dll-proc.cc

@@ -32,7 +32,8 @@
 #ifdef HAVE_MALLOC_H
 # include  <malloc.h>
 #endif
-# include  <stdlib.h>
+# include  <cstdlib>
+# include  <cstring>
 
 
 bool dll_target::process(const NetProcTop*net)

t-dll.cc

@@ -31,7 +31,8 @@
 #ifdef HAVE_MALLOC_H
 # include  <malloc.h>
 #endif
-# include  <stdlib.h>
+# include  <cstdlib>
+# include  <cstring>
 
 #include <new> // standard operator new
 using std::bad_alloc;

verireal.cc

@@ -24,7 +24,8 @@
 
 # include  "verireal.h"
 # include  "verinum.h"
-# include  <stdlib.h>
+# include  <cstdlib>
+# include  <cstring>
 # include  <ctype.h>
 # include  <iostream>
 # include  <math.h>