diff --git a/ChangeLog b/ChangeLog
index 559dfaef..53697ebd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,21 @@
+2007-11-19  Nicolas François  <nicolas.francois@centraliens.net>
+
+	Fix some compilation warnings:
+	* src/login.c: "dereferencing type-punned pointer will break
+	strict-aliasing rules", add a variable indirection: ptr_pam_user.
+	* lib/commonio.c: do not initialize the sb stat structure.
+	* lib/pwio.c, lib/shadowio.c, lib/sgroupio.c, lib/groupio.c:
+	initialize the security context if WITH_SELINUX.
+	* lib/nscd.c: The service argument is not const (used in the exec*
+	parameters). This matches with the prototype definition.
+	* src/groupmems.c: Avoid ++i when i is also used in the same line.
+	* src/newusers.c: i is positive every time it is compared. Add
+	cast to unsigned int.
+	* src/nologin.c: Use a main() prototype with no arguments.
+	* libmisc/getdate.y: Initialize the type and value fields of the
+	terminating entry for each TABLE.
+	* libmisc/tz.c: Use "TZ=CST6CDT" as the default timezone.
+
 2007-11-19  Nicolas François  <nicolas.francois@centraliens.net>
 
 	* man/pl/Makefile.am: Add getspnam.3 to EXTRA_DIST since it is
diff --git a/lib/commonio.c b/lib/commonio.c
index 85eb7c41..a1e7e1ef 100644
--- a/lib/commonio.c
+++ b/lib/commonio.c
@@ -53,7 +53,7 @@ int lrename (const char *old, const char *new)
 	int res;
 
 #if defined(S_ISLNK)
-	struct stat sb = { 0 };
+	struct stat sb;
 	if (lstat (new, &sb) == 0 && S_ISLNK (sb.st_mode)) {
 		if (realpath (new, resolved_path) == NULL) {
 			perror ("realpath in lrename()");
diff --git a/lib/groupio.c b/lib/groupio.c
index 18a8f49a..686dca95 100644
--- a/lib/groupio.c
+++ b/lib/groupio.c
@@ -63,6 +63,9 @@ static struct commonio_db group_db = {
 	GROUP_FILE,		/* filename */
 	&group_ops,		/* ops */
 	NULL,			/* fp */
+#ifdef WITH_SELINUX
+	NULL,			/* scontext */
+#endif
 	NULL,			/* head */
 	NULL,			/* tail */
 	NULL,			/* cursor */
diff --git a/lib/nscd.c b/lib/nscd.c
index d897af74..baa5f6e5 100644
--- a/lib/nscd.c
+++ b/lib/nscd.c
@@ -16,7 +16,7 @@
 /*
  * nscd_flush_cache - flush specified service buffer in nscd cache
  */
-int nscd_flush_cache (const char *service)
+int nscd_flush_cache (char *service)
 {
 	pid_t pid, termpid;
 	int err, status;
diff --git a/lib/pwio.c b/lib/pwio.c
index 14702ff5..ae99b411 100644
--- a/lib/pwio.c
+++ b/lib/pwio.c
@@ -64,6 +64,9 @@ static struct commonio_db passwd_db = {
 	PASSWD_FILE,		/* filename */
 	&passwd_ops,		/* ops */
 	NULL,			/* fp */
+#ifdef WITH_SELINUX
+	NULL,			/* scontext */
+#endif
 	NULL,			/* head */
 	NULL,			/* tail */
 	NULL,			/* cursor */
diff --git a/lib/sgroupio.c b/lib/sgroupio.c
index 4666b085..cf3f2dd1 100644
--- a/lib/sgroupio.c
+++ b/lib/sgroupio.c
@@ -107,6 +107,9 @@ static struct commonio_db gshadow_db = {
 	SGROUP_FILE,		/* filename */
 	&gshadow_ops,		/* ops */
 	NULL,			/* fp */
+#ifdef WITH_SELINUX
+	NULL,			/* scontext */
+#endif
 	NULL,			/* head */
 	NULL,			/* tail */
 	NULL,			/* cursor */
diff --git a/lib/shadowio.c b/lib/shadowio.c
index b7bd2e1b..d22f0c6e 100644
--- a/lib/shadowio.c
+++ b/lib/shadowio.c
@@ -61,6 +61,9 @@ static struct commonio_db shadow_db = {
 	SHADOW_FILE,		/* filename */
 	&shadow_ops,		/* ops */
 	NULL,			/* fp */
+#ifdef WITH_SELINUX
+	NULL,			/* scontext */
+#endif
 	NULL,			/* head */
 	NULL,			/* tail */
 	NULL,			/* cursor */
diff --git a/libmisc/getdate.y b/libmisc/getdate.y
index e4504e3e..134b3f19 100644
--- a/libmisc/getdate.y
+++ b/libmisc/getdate.y
@@ -464,7 +464,7 @@ static TABLE const MonthDayTable[] = {
     { "thurs",		tDAY, 4 },
     { "friday",		tDAY, 5 },
     { "saturday",	tDAY, 6 },
-    { NULL }
+    { NULL, 0, 0 }
 };
 
 /* Time units table. */
@@ -479,7 +479,7 @@ static TABLE const UnitsTable[] = {
     { "min",		tMINUTE_UNIT,	1 },
     { "second",		tSEC_UNIT,	1 },
     { "sec",		tSEC_UNIT,	1 },
-    { NULL }
+    { NULL, 0, 0 }
 };
 
 /* Assorted relative-time words. */
@@ -504,7 +504,7 @@ static TABLE const OtherTable[] = {
     { "eleventh",	tUNUMBER,	11 },
     { "twelfth",	tUNUMBER,	12 },
     { "ago",		tAGO,	1 },
-    { NULL }
+    { NULL, 0, 0 }
 };
 
 /* The timezone table. */
@@ -559,7 +559,7 @@ static TABLE const TimezoneTable[] = {
     { "nzst",	tZONE,     -HOUR (12) },	/* New Zealand Standard */
     { "nzdt",	tDAYZONE,  -HOUR (12) },	/* New Zealand Daylight */
     { "idle",	tZONE,     -HOUR (12) },	/* International Date Line East */
-    {  NULL  }
+    { NULL, 0, 0 }
 };
 
 /* Military timezone table. */
@@ -589,7 +589,7 @@ static TABLE const MilitaryTable[] = {
     { "x",	tZONE,	HOUR (-11) },
     { "y",	tZONE,	HOUR (-12) },
     { "z",	tZONE,	HOUR (  0) },
-    { NULL }
+    { NULL, 0, 0 }
 };
 
 
diff --git a/libmisc/tz.c b/libmisc/tz.c
index 73829d75..6ea0fceb 100644
--- a/libmisc/tz.c
+++ b/libmisc/tz.c
@@ -45,7 +45,7 @@ char *tz (const char *fname)
 {
 	FILE *fp = 0;
 	static char tzbuf[BUFSIZ];
-	const char *def_tz;
+	const char *def_tz = "TZ=CST6CDT";
 
 	if ((fp = fopen (fname, "r")) == NULL ||
 	    fgets (tzbuf, sizeof (tzbuf), fp) == NULL) {
diff --git a/src/groupmems.c b/src/groupmems.c
index 97252e9d..cb78ce24 100644
--- a/src/groupmems.c
+++ b/src/groupmems.c
@@ -126,7 +126,8 @@ static void rmfromgroup (char *user, char **members)
 	}
 
 	while (found && NULL != members[i]) {
-		members[i] = members[++i];
+		members[i] = members[i+1];
+		i++;
 	}
 
 	if (!found) {
diff --git a/src/login.c b/src/login.c
index beb55f83..1120d263 100644
--- a/src/login.c
+++ b/src/login.c
@@ -348,6 +348,7 @@ int main (int argc, char **argv)
 	int retcode;
 	pid_t child;
 	char *pam_user;
+	char **ptr_pam_user = &pam_user;
 #else
 	struct spwd *spwd = NULL;
 #endif
@@ -620,7 +621,7 @@ int main (int argc, char **argv)
 			/* if we didn't get a user on the command line,
 			   set it to NULL */
 			pam_get_item (pamh, PAM_USER,
-				      (const void **) &pam_user);
+				      (const void **)ptr_pam_user);
 			if (pam_user[0] == '\0')
 				pam_set_item (pamh, PAM_USER, NULL);
 
@@ -644,7 +645,7 @@ int main (int argc, char **argv)
 			  retcode = pam_authenticate (pamh, 0);
 
 			  pam_get_item (pamh, PAM_USER,
-					(const void **) &pam_user);
+					(const void **) ptr_pam_user);
 
 			  if (pam_user && pam_user[0]) {
 			    pwd = xgetpwnam(pam_user);
@@ -737,7 +738,7 @@ int main (int argc, char **argv)
 		   First get the username that we are actually using, though.
 		 */
 		retcode =
-		    pam_get_item (pamh, PAM_USER, (const void **) &pam_user);
+		    pam_get_item (pamh, PAM_USER, (const void **)ptr_pam_user);
 		setpwent ();
 		pwd = xgetpwnam (pam_user);
 		if (!pwd) {
diff --git a/src/newusers.c b/src/newusers.c
index f2885902..ce27fb9c 100644
--- a/src/newusers.c
+++ b/src/newusers.c
@@ -116,11 +116,11 @@ static int add_group (const char *name, const char *gid, gid_t * ngid)
 	if (gid[0] == '\0') {
 		i = 100;
 		for (pw_rewind (); (pwd = pw_next ());) {
-			if (pwd->pw_uid >= i)
+			if (pwd->pw_uid >= (unsigned int)i)
 				i = pwd->pw_uid + 1;
 		}
 		for (gr_rewind (); (grp = gr_next ());) {
-			if (grp->gr_gid == i) {
+			if (grp->gr_gid == (unsigned int)i) {
 				i = -1;
 				break;
 			}
@@ -133,7 +133,7 @@ static int add_group (const char *name, const char *gid, gid_t * ngid)
 		 */
 		i = atoi (gid);
 		for (gr_rewind (); (grp = gr_next ());)
-			if (grp->gr_gid == i)
+			if (grp->gr_gid == (unsigned int)i)
 				goto add_member;
 	} else
 		/*
@@ -149,7 +149,7 @@ static int add_group (const char *name, const char *gid, gid_t * ngid)
 	 */
 	if (i == -1) {
 		for (i = 100, gr_rewind (); (grp = gr_next ());)
-			if (grp->gr_gid >= i)
+			if (grp->gr_gid >= (unsigned int)i)
 				i = grp->gr_gid + 1;
 	}
 
diff --git a/src/nologin.c b/src/nologin.c
index 85d54631..3fa7edb4 100644
--- a/src/nologin.c
+++ b/src/nologin.c
@@ -30,7 +30,7 @@
 #include <unistd.h>
 #include "exitcodes.h"
 
-int main (int argc, char **argv)
+int main ()
 {
 	const char *user, *tty;