Our RHEL 3 systems have a libusb installed, but it doesn't have any
usb_get_string symbols. Check for the function that is used -
usb_get_string_simple.

cupsTempFile2 returns a pointer and NULL on error, the HP compilers
errored comparing a pointer to <0

IRIX cc wants initializers to be constants.

Index: config-scripts/cups-common.m4
===================================================================
--- config-scripts/cups-common.m4.orig	2011-01-06 22:27:54.000000000 +0000
+++ config-scripts/cups-common.m4	2011-01-11 03:22:55.818583630 +0000
@@ -207,7 +226,7 @@
 fi
 
 if test $check_libusb = yes; then
-	AC_CHECK_LIB(usb, usb_init,[
+	AC_CHECK_LIB(usb, usb_get_string_simple,[
 		AC_CHECK_HEADER(usb.h,
 			AC_DEFINE(HAVE_USB_H)
 			LIBUSB="-lusb")])
Index: systemv/lpadmin.c
===================================================================
--- systemv/lpadmin.c.orig	2010-08-13 01:34:04.000000000 +0000
+++ systemv/lpadmin.c	2011-01-10 21:47:11.397588001 +0000
@@ -1240,7 +1240,7 @@
     ppdMarkDefaults(ppd);
     cupsMarkOptions(ppd, num_options, options);
 
-    if ((out = cupsTempFile2(tempfile, sizeof(tempfile))) < 0)
+    if ((out = cupsTempFile2(tempfile, sizeof(tempfile))) == NULL)
     {
       _cupsLangPrintError(_("ERROR: Unable to create temporary file"));
       ippDelete(request);
Index: scheduler/ipp.c
===================================================================
--- scheduler/ipp.c.orig	2010-10-06 20:07:44.000000000 +0000
+++ scheduler/ipp.c	2011-01-11 03:22:07.374292099 +0000
@@ -5001,7 +5001,8 @@
 	  case IPP_TAG_ENUM :
 	      if (!strncmp(s, "time-at-", 8))
 	      {
-	        struct timeval tv = { attr->values[i].integer, 0 };
+	        struct timeval tv = { 0, 0 };
+	        tv.tv_sec = attr->values[i].integer;
 	        cupsFilePuts(out, cupsdGetDateTime(&tv, CUPSD_TIME_STANDARD));
 	      }
 	      else