make: fix GCC warnings

@@ -206,11 +206,11 @@
         extern  char            verstring[];
 #endif
 
 jmp_buf jmpbuffer;
 #if !defined(linux)
-nl_catd catd;
+extern nl_catd catd;
 #endif
 
 /*
  *      main(argc, argv)
  *

@@ -1445,58 +1445,58 @@
                                 if (k) {
                                         argv[k] = NULL;
                                 }
                                 break;
                         case 1: /* -f seen */
-                                argv[i] = NOCATGETS("-f");
+                                argv[i] = (char *)NOCATGETS("-f");
                                 break;
                         case 2: /* -c seen */
-                                argv[i] = NOCATGETS("-c");
+                                argv[i] = (char *)NOCATGETS("-c");
 #ifndef TEAMWARE_MAKE_CMN
                                 warning(catgets(catd, 1, 281, "Ignoring DistributedMake -c option"));
 #endif
                                 break;
                         case 4: /* -g seen */
-                                argv[i] = NOCATGETS("-g");
+                                argv[i] = (char *)NOCATGETS("-g");
 #ifndef TEAMWARE_MAKE_CMN
                                 warning(catgets(catd, 1, 282, "Ignoring DistributedMake -g option"));
 #endif
                                 break;
                         case 8: /* -j seen */
-                                argv[i] = NOCATGETS("-j");
+                                argv[i] = (char *)NOCATGETS("-j");
 #ifndef TEAMWARE_MAKE_CMN
                                 warning(catgets(catd, 1, 283, "Ignoring DistributedMake -j option"));
 #endif
                                 break;
                         case 16: /* -M seen */
-                                argv[i] = NOCATGETS("-M");
+                                argv[i] = (char *)NOCATGETS("-M");
 #ifndef TEAMWARE_MAKE_CMN
                                 warning(catgets(catd, 1, 284, "Ignoring ParallelMake -M option"));
 #endif
                                 break;
                         case 32: /* -m seen */
-                                argv[i] = NOCATGETS("-m");
+                                argv[i] = (char *)NOCATGETS("-m");
 #ifndef TEAMWARE_MAKE_CMN
                                 warning(catgets(catd, 1, 285, "Ignoring DistributedMake -m option"));
 #endif
                                 break;
 #ifndef PARALLEL
                         case 128: /* -O seen */
-                                argv[i] = NOCATGETS("-O");
+                                argv[i] = (char *)NOCATGETS("-O");
                                 break;
 #endif
                         case 256: /* -K seen */
-                                argv[i] = NOCATGETS("-K");
+                                argv[i] = (char *)NOCATGETS("-K");
                                 break;
                         case 512:       /* -o seen */
-                                argv[i] = NOCATGETS("-o");
+                                argv[i] = (char *)NOCATGETS("-o");
 #ifndef TEAMWARE_MAKE_CMN
                                 warning(catgets(catd, 1, 311, "Ignoring DistributedMake -o option"));
 #endif
                                 break;
                         case 1024: /* -x seen */
-                                argv[i] = NOCATGETS("-x");
+                                argv[i] = (char *)NOCATGETS("-x");
 #ifndef TEAMWARE_MAKE_CMN
                                 warning(catgets(catd, 1, 353, "Ignoring DistributedMake -x option"));
 #endif
                                 break;
                         default: /* > 1 of -c, f, g, j, K, M, m, O, o, x seen */

@@ -1648,11 +1648,11 @@
                         }
                 }
         }
         /* Allocate memory for the new MAKEFLAGS argv */
         mf_argv = (char **) malloc((mf_argc + 1) * sizeof(char *));
-        mf_argv[0] = NOCATGETS("MAKEFLAGS");
+        mf_argv[0] = (char *)NOCATGETS("MAKEFLAGS");
         /*
          * Convert the MAKEFLAGS string value into a vector of char *,
          * similar to argv.
          */
         cp = cp_orig;

@@ -3018,11 +3018,11 @@
  * Append the DMake option and value to the MAKEFLAGS string.
  */
 static void
 append_makeflags_string(Name name, register String makeflags_string)
 {
-        char            *option;
+        const char      *option;
 
         if (strcmp(name->string_mb, NOCATGETS("DMAKE_GROUP")) == 0) {
                 option = NOCATGETS(" -g ");
         } else if (strcmp(name->string_mb, NOCATGETS("DMAKE_MAX_JOBS")) == 0) {
                 option = NOCATGETS(" -j ");