diff --git a/Makefile b/Makefile
index d973413a..80f4c89f 100644
--- a/Makefile
+++ b/Makefile
@@ -18,11 +18,12 @@ config:
 	ROOT="${ROOT}" ${ROOT}/util/genconfig
 
 deb-dep:
-	apt-get -qq install build-essential debhelper libxext-dev x11proto-xext-dev libx11-dev
+	apt-get -qq install build-essential debhelper libxext-dev x11proto-xext-dev libx11-dev libxrandr-dev
 
 deb:
 	dpkg-buildpackage -rfakeroot
 
 include ${ROOT}/mk/dir.mk
 INSTDIRS = ${PDIRS}
+.PHONY: config
 
diff --git a/cmd/wmii/area.c b/cmd/wmii/area.c
index 62aee514..9437e82e 100644
--- a/cmd/wmii/area.c
+++ b/cmd/wmii/area.c
@@ -4,7 +4,7 @@
 #include "dat.h"
 #include <assert.h>
 #include <math.h>
-#include <sys/limits.h>
+#include <limits.h>
 #include "fns.h"
 
 Client*
diff --git a/cmd/wmii/bar.c b/cmd/wmii/bar.c
index 25a56d4e..254b4981 100644
--- a/cmd/wmii/bar.c
+++ b/cmd/wmii/bar.c
@@ -120,6 +120,7 @@ bar_draw(WMScreen *s) {
 				b->smaller = *pb;
 				*pb = b;
 			}
+		SET(shrink);
 		for(tb = largest; tb; tb = tb->smaller) {
 			width -= Dx(tb->r);
 			tw += Dx(tb->r);
@@ -128,7 +129,6 @@ bar_draw(WMScreen *s) {
 				if(Dx(tb->r) * shrink >= Dx(tb->smaller->r))
 					break;
 		}
-		SET(shrink);
 		if(tb)
 			for(b = largest; b != tb->smaller; b = b->smaller)
 				b->r.max.x *= shrink;
diff --git a/cmd/wmii/ewmh.c b/cmd/wmii/ewmh.c
index e67f9e4f..5ec54a83 100644
--- a/cmd/wmii/ewmh.c
+++ b/cmd/wmii/ewmh.c
@@ -3,7 +3,7 @@
  */
 #include "dat.h"
 #include <assert.h>
-#include <sys/limits.h>
+#include <limits.h>
 #include "fns.h"
 
 Window *ewmhwin;
diff --git a/cmd/wmii/float.c b/cmd/wmii/float.c
index fa44466b..c7d22910 100644
--- a/cmd/wmii/float.c
+++ b/cmd/wmii/float.c
@@ -2,7 +2,7 @@
  * See LICENSE file for license details.
  */
 #include "dat.h"
-#include <sys/limits.h>
+#include <limits.h>
 #include "fns.h"
 
 static void float_placeframe(Frame*);
@@ -123,6 +123,7 @@ float_placeframe(Frame *f) {
 		vp2 = vptemp;
 	}
 
+	p = ZP; /* SET(p) */
 	if(vp->n == 0) {
 		p.x = random() % max(0, Dx(a->r) - dim.x);
 		p.y = random() % max(0, Dy(a->r) - dim.y);
diff --git a/cmd/wmii/key.c b/cmd/wmii/key.c
index 04d5e970..dbf9f9b9 100644
--- a/cmd/wmii/key.c
+++ b/cmd/wmii/key.c
@@ -169,7 +169,8 @@ static Key *
 match_keys(Key *k, ulong mod, KeyCode keycode, bool seq) {
 	Key *ret = nil, *next;
 
-	for(next = k->tnext; k; (k=next) && (next=k->tnext)) {
+	/* I *hate* GCC 4. */
+	for(next = k->tnext; k; (void)((k=next) && (next=k->tnext))) {
 		if(seq)
 			k = k->next;
 		if(k && (k->mod == mod) && (k->key == keycode)) {
diff --git a/cmd/wmii/mouse.c b/cmd/wmii/mouse.c
index b9aaef59..ad145b48 100644
--- a/cmd/wmii/mouse.c
+++ b/cmd/wmii/mouse.c
@@ -719,6 +719,9 @@ mouse_resize(Client *c, bool grabbox, Align align) {
 	hr = subpt(frect.max, frect.min);
 	hr = divpt(hr, Pt(2, 2));
 
+	SET(hrx);
+	SET(hry);
+
 	if(align != Center) {
 		d = hr;
 		if(align&North) d.y -= hr.y;
@@ -757,8 +760,6 @@ mouse_resize(Client *c, bool grabbox, Align align) {
 			d.y = ev.xmotion.y_root;
 
 			if(align == Center && !grabbox) {
-				SET(hrx);
-				SET(hry);
 				d.x = (d.x * hrx) - pt.x;
 				d.y = (d.y * hry) - pt.y;
 			}else
diff --git a/include/util.h b/include/util.h
index 94793276..0e1e7af3 100644
--- a/include/util.h
+++ b/include/util.h
@@ -76,5 +76,6 @@ _used(long a, ...) {
 #  undef USED
 #  undef SET
 #  define USED(...) _used((long)__VA_ARGS__)
-#  define SET(x) USED(&x)
+#  define SET(x) (x = 0)
+/* # define SET(x) USED(&x) GCC 4 is 'too smart' for this. */
 #endif
diff --git a/mk/hdr.mk b/mk/hdr.mk
index 9394a9ad..4600119d 100644
--- a/mk/hdr.mk
+++ b/mk/hdr.mk
@@ -77,8 +77,9 @@ install: printinstall mkdirs
 depend: cleandep
 
 FILTER = cat
-COMPILE= CC="$(CC)" CFLAGS="$(CFLAGS)" $(ROOT)/util/compile
-COMPILEPIC= CC="$(CC)" CFLAGS="$(CFLAGS) $(SOCFLAGS)" $(ROOT)/util/compile
+EXCFLAGS = -I$$(echo $(INCPATH)|sed 's/:/ -I/g') -D_XOPEN_SOURCE=600
+COMPILE= CC="$(CC)" CFLAGS="$(EXCFLAGS) $(CFLAGS)" $(ROOT)/util/compile
+COMPILEPIC= CC="$(CC)" CFLAGS="$(EXCFLAGS) $(CFLAGS) $(SOCFLAGS)" $(ROOT)/util/compile
 LINK= LD="$(LD)" LDFLAGS="$(LDFLAGS)" $(ROOT)/util/link
 LINKSO= LD="$(LD)" LDFLAGS="$(SOLDFLAGS)" $(ROOT)/util/link
 CLEANNAME=$(ROOT)/util/cleanname
@@ -91,6 +92,5 @@ MKCFG:=${shell $(MKCFGSH)}
 MKCFG!=${MKCFGSH}
 include $(MKCFG)
 
-CFLAGS += -I$$(echo $(INCPATH)|sed 's/:/ -I/g')
 include $(ROOT)/mk/common.mk
 
diff --git a/util/link b/util/link
index 5ad0c0e7..a3ab6f94 100755
--- a/util/link
+++ b/util/link
@@ -26,7 +26,7 @@ $LD -o $outfile $ofiles $LDFLAGS $args >$xtmp 2>&1
 status=$?
 
 sed 's/.*: In function `[^:]*: *//' $xtmp | egrep . | 
-egrep -v 'is almost always misused|is dangerous, better use' 
+egrep -v 'is almost always misused|is dangerous, better use|in statically linked applications requires at runtime'
 rm -f $xtmp
 
 exit $status