[PATCH libevdev v1] fix program_invocation_short_name undeclared

[Peter Seiderer]

Add fallback in case program_invocation_short_name is undeclared,
e.g. in case of some uclibc configurations.

See [1] for a detailed buildroot failure description.

[1] http://lists.busybox.net/pipermail/buildroot/2015-March/122715.html

Signed-off-by: Peter Seiderer <ps.report at gmx.net>
---
 configure.ac                   | 8 ++++++++
 tools/libevdev-tweak-device.c  | 4 ++++
 tools/mouse-dpi-tool.c         | 4 ++++
 tools/touchpad-edge-detector.c | 4 ++++
 4 files changed, 20 insertions(+)

diff --git a/configure.ac b/configure.ac
index 59c691b..e8abcc1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -144,6 +144,14 @@ fi
 
 AM_CONDITIONAL(ENABLE_STATIC_SYMBOL_LEAKS_TEST, [test "x$static_symbol_leaks_test" = "xyes"])
 
+AC_MSG_CHECKING([for program_invocation_short_name])
+AC_TRY_COMPILE([#define _GNU_SOURCE
+		#include <errno.h>],
+	[strlen(program_invocation_short_name)],
+	AC_DEFINE(HAVE_PROGRAM_INVOCATION_SHORT_NAME, 1,
+		[Defined if program_invocation_short_name is defined])
+	AC_MSG_RESULT(yes), AC_MSG_RESULT(no))
+
 AC_CONFIG_FILES([Makefile
 		 libevdev/Makefile
 		 doc/Makefile
diff --git a/tools/libevdev-tweak-device.c b/tools/libevdev-tweak-device.c
index f2031c2..3dacb4e 100644
--- a/tools/libevdev-tweak-device.c
+++ b/tools/libevdev-tweak-device.c
@@ -36,6 +36,10 @@
 
 #include "libevdev.h"
 
+#ifndef HAVE_PROGRAM_INVOCATION_SHORT_NAME
+static char *program_invocation_short_name = "libevdev-tweak-device";
+#endif
+
 static unsigned int changes; /* bitmask of changes */
 static struct input_absinfo absinfo;
 static int axis;
diff --git a/tools/mouse-dpi-tool.c b/tools/mouse-dpi-tool.c
index be30a4d..4e396b2 100644
--- a/tools/mouse-dpi-tool.c
+++ b/tools/mouse-dpi-tool.c
@@ -41,6 +41,10 @@
 #define min(a, b) (((a) < (b)) ? (a) : (b))
 #define max(a, b) (((a) > (b)) ? (a) : (b))
 
+#ifndef HAVE_PROGRAM_INVOCATION_SHORT_NAME
+static char *program_invocation_short_name = "mouse-dpi-tool";
+#endif
+
 struct measurements {
 	int distance;
 	double frequency;
diff --git a/tools/touchpad-edge-detector.c b/tools/touchpad-edge-detector.c
index e5420cf..12e1127 100644
--- a/tools/touchpad-edge-detector.c
+++ b/tools/touchpad-edge-detector.c
@@ -41,6 +41,10 @@
 #define min(a, b) (((a) < (b)) ? (a) : (b))
 #define max(a, b) (((a) > (b)) ? (a) : (b))
 
+#ifndef HAVE_PROGRAM_INVOCATION_SHORT_NAME
+static char *program_invocation_short_name = "touchpad-edge-detector";
+#endif
+
 static int
 usage(void) {
 	printf("Usage: %s /dev/input/event0\n", program_invocation_short_name);
-- 
2.1.4