HPLIP 3.15.4: hp_ipp.c needs '#define _GNU_SOURCE'

[Johannes Meixner]

At least on openSUSE I need this patch to build HPLIP 3.15.4:

##############################################################
--- protocol/hp_ipp.c.orig 2015-04-14 11:53:09.000000000 +0200
+++ protocol/hp_ipp.c 2015-05-19 13:12:47.000000000 +0200
@@ -18,6 +18,9 @@ Boston, MA 02110-1301, USA.

 \******************************************************************************/

+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif

 #include <cups/cups.h>
 #include <cups/language.h>

##############################################################

Without it there are various issues, primarily compiler warnings about strcasestr
that lead to SUSE build errors because strcasestr needs '#define _GNU_SOURCE'
in addition to '#include <string.h>' - see "man strcasestr":

##############################################################

       #define _GNU_SOURCE

       #include <string.h>

       char *strcasestr(const char *haystack, const char *needle);

##############################################################

[Johannes Meixner (jsmeix)]

FYI:

There are some more missing '#include <...>'
because I get those compiler warnings:

prnt/cupsext/cupsext.c:108:5: warning:
implicit declaration of function '_releaseCupsInstance'

prnt/cupsext/cupsext.c:390:5: warning:
implicit declaration of function 'addCupsPrinter'

prnt/cupsext/cupsext.c:414:5: warning:
implicit declaration of function 'delCupsPrinter'

prnt/cupsext/cupsext.c:440:5: warning:
implicit declaration of function 'setDefaultCupsPrinter'

prnt/cupsext/cupsext.c:461:5: warning:
implicit declaration of function 'controlCupsPrinter'

io/hpmud/jd.c:77:7: warning:
implicit declaration of function 'strtol'

scan/sane/hpaio.c:336:5: warning:
implicit declaration of function 'InitDbus'

scan/sane/bb_ledm.c:1008:6: warning:
implicit declaration of function 'usleep'

scan/sane/sclpml.c:435:13: warning:
implicit declaration of function 'gettimeofday'

scan/sane/sclpml.c:1887:5: warning:
implicit declaration of function 'strcasestr'

The follwing patch fixes them - except those in prnt/cupsext/cupsext.c which
I leave for you HPLIP authors at upstream because I won't try to guess what
your preferred way is how to fix it (add them to protocol/hp_ipp.h or
protocol/hp_ipp_i.h or something else...?)

##############################################################################
--- protocol/hp_ipp.c.orig 2015-04-14 11:53:09.000000000 +0200
+++ protocol/hp_ipp.c 2015-05-19 13:12:47.000000000 +0200
@@ -18,6 +18,9 @@ Boston, MA 02110-1301, USA.

 \******************************************************************************/

+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif

 #include <cups/cups.h>
 #include <cups/language.h>
--- scan/sane/sclpml.c.orig 2015-04-14 11:53:17.000000000 +0200
+++ scan/sane/sclpml.c 2015-05-19 13:45:44.000000000 +0200
@@ -25,11 +25,16 @@

 \************************************************************************************/

+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <string.h>
+#include <sys/time.h>
 #include "sane.h"
 #include "saneopts.h"
 #include "common.h"
--- scan/sane/bb_ledm.c.orig 2015-05-19 13:47:53.000000000 +0200
+++ scan/sane/bb_ledm.c 2015-05-19 13:48:42.000000000 +0200
@@ -26,7 +26,7 @@
 # include "http.h"
 # include "xml.h"
 # include <stdlib.h>
-
+# include <unistd.h>
 # include <stdint.h>

 # define _STRINGIZE(x) #x
--- scan/sane/hpaio.c.orig 2015-04-14 11:53:17.000000000 +0200
+++ scan/sane/hpaio.c 2015-05-19 13:51:21.000000000 +0200
@@ -43,6 +43,7 @@
 #include "hpaio.h"
 # include "ledm.h"
 #include "sclpml.h"
+#include "io.h"

 #define DEBUG_DECLARE_ONLY
 #include "sanei_debug.h"
--- io/hpmud/jd.c.orig 2015-05-19 13:46:39.000000000 +0200
+++ io/hpmud/jd.c 2015-05-19 13:47:01.000000000 +0200
@@ -31,6 +31,7 @@
 #endif

 #include <signal.h>
+#include <stdlib.h>
 #include "hpmud.h"
 #include "hpmudi.h"

##############################################################################