diff -r 32b6354d2ae6 -r b054472db5b7 SConstruct
--- a/SConstruct	Tue Jan 18 16:30:06 2011 -0600
+++ b/SConstruct	Wed Jan 19 01:46:44 2011 -0800
@@ -704,8 +704,11 @@
     Exit(1)
 
 # Check for librt.
-have_posix_clock = conf.CheckLib(None, 'clock_nanosleep', 'time.h') or \
-    conf.CheckLib('rt', 'clock_nanosleep', 'time.h')
+have_posix_clock = \
+    conf.CheckLibWithHeader(None, 'time.h', 'C',
+                            'clock_nanosleep(0,0,NULL,NULL);') or \
+    conf.CheckLibWithHeader('rt', 'time.h', 'C',
+                            'clock_nanosleep(0,0,NULL,NULL);')
 
 if not have_posix_clock:
     print "Can't find library for POSIX clocks."