Index: histrap.c
===================================================================
RCS file: /cvs/src/bin/mksh/histrap.c,v
retrieving revision 1.111
diff -u -r1.111 histrap.c
--- histrap.c	7 Sep 2011 15:24:40 -0000	1.111
+++ histrap.c	21 Nov 2011 10:17:25 -0000
@@ -1127,7 +1127,9 @@
 	/* SIGTERM is not fatal for interactive */
 	sigtraps[SIGTERM].flags |= TF_DFL_INTR;
 	sigtraps[SIGHUP].flags |= TF_FATAL;
+#ifdef SIGCLD
 	sigtraps[SIGCHLD].flags |= TF_SHELL_USES;
+#endif
 
 	/* these are always caught so we can clean up any temporary files. */
 	setsig(&sigtraps[SIGINT], trapsig, SS_RESTORE_ORIG);
Index: jobs.c
===================================================================
RCS file: /cvs/src/bin/mksh/jobs.c,v
retrieving revision 1.81
diff -u -r1.81 jobs.c
--- jobs.c	27 Aug 2011 18:07:10 -0000	1.81
+++ jobs.c	21 Nov 2011 10:21:14 -0000
@@ -171,7 +171,9 @@
 	    SS_RESTORE_ORIG|SS_FORCE|SS_SHTRAP);
 #else
 	/* Make sure SIGCHLD isn't ignored - can do odd things under SYSV */
+# ifdef SIGCHLD
 	setsig(&sigtraps[SIGCHLD], SIG_DFL, SS_RESTORE_ORIG|SS_FORCE);
+# endif
 #endif
 
 #ifndef MKSH_UNEMPLOYED
@@ -1078,7 +1080,9 @@
 #ifndef MKSH_NOPROSPECTOFWORK
 		sigsuspend(&sm_default);
 #else
+# ifdef SIGCHLD
 		j_sigchld(SIGCHLD);
+# endif
 #endif
 		if (fatal_trap) {
 			int oldf = j->flags & (JF_WAITING|JF_W_ASYNCNOTIFY);
Index: misc.c
===================================================================
RCS file: /cvs/src/bin/mksh/misc.c,v
retrieving revision 1.177
diff -u -r1.177 misc.c
--- misc.c	26 Oct 2011 20:46:39 -0000	1.177
+++ misc.c	21 Nov 2011 10:46:30 -0000
@@ -249,9 +249,14 @@
 		DO_SETUID(setresuid, (ksheuid, ksheuid, ksheuid));
 #else
 		/* seteuid, setegid, setgid don't EAGAIN on Linux */
-		seteuid(ksheuid = kshuid = getuid());
+		ksheuid = kshuid = getuid();
+#ifndef DJGPP
+		seteuid(ksheuid);
+#endif
 		DO_SETUID(setuid, (ksheuid));
+#ifndef DJGPP
 		setegid(kshegid);
+#endif
 		setgid(kshegid);
 #endif
 	} else if ((f == FPOSIX || f == FSH) && newval) {