Do not print any warning from dfu-util

Author: cmaglie

err.h

@@ -0,0 +1,20 @@
+
+/*
+// The original macros are defined as follows:
+# define warnx(...) do {\
+    fprintf(stderr, __VA_ARGS__);\
+    fprintf(stderr, "\n");\ } while (0)
+# define warn(...) do {\
+    fprintf(stderr, "%s: ", strerror(errno));\
+    warnx(__VA_ARGS__); } while (0)
+*/
+// No-OP: do not report any warning
+# define warnx(...)      do { } while(0)
+# define warn(...)       do { } while(0)
+
+# define errx(eval, ...) do {\
+    warnx(__VA_ARGS__);\
+    exit(eval); } while (0)
+# define err(eval, ...) do {\
+    warn(__VA_ARGS__);\
+    exit(eval); } while (0)

main.go

@@ -1,8 +1,8 @@
 package main
 
 /*
-#cgo CPPFLAGS: -DHAVE_UNISTD_H -DHAVE_NANOSLEEP -I. -Idfu-util-0.11/src -I/usr/include/libusb-1.0
-#cgo CFLAGS: -DHAVE_UNISTD_H -DHAVE_NANOSLEEP -I. -Idfu-util-0.11/src -I/usr/include/libusb-1.0
+#cgo CPPFLAGS: -DHAVE_UNISTD_H -DHAVE_NANOSLEEP -DHAVE_ERR -I. -Idfu-util-0.11/src -I/usr/include/libusb-1.0
+#cgo CFLAGS: -DHAVE_UNISTD_H -DHAVE_NANOSLEEP -DHAVE_ERR -I. -Idfu-util-0.11/src -I/usr/include/libusb-1.0
 #cgo LDFLAGS: -lusb-1.0
 
 #include <dfu.h>