Add missing err.h on Windows

Author: ikspress

configure.ac

@@ -37,6 +37,17 @@ AC_CHECK_FUNCS([memset])
 # C99
 CFLAGS="$CFLAGS -std=c99"
 
+case "${host}" in
+  *-cygwin* | *-mingw*)
+  os_win32=yes
+  ;;
+  *)
+  os_win32=no
+  ;;
+esac
+
+AM_CONDITIONAL([OS_WIN32], [test "x$os_win32" = "xyes"])
+
 AC_CONFIG_FILES([Makefile
                  src/Makefile])
 AC_OUTPUT

src/Makefile.am

@@ -8,3 +8,7 @@ mfoc_SOURCES = crapto1.c crypto1.c mfoc.c mifare.c nfc-utils.c
 mfoc_LDADD   = @libnfc_LIBS@
 
 dist_man_MANS = mfoc.1
+
+if OS_WIN32
+  AM_CFLAGS += -I@srcdir@/win32
+endif

src/win32/err.h

@@ -0,0 +1,19 @@
+#ifndef _ERR_H_
+#define _ERR_H_
+
+#include <stdlib.h>
+
+#define warnx(...) do { \
+    fprintf (stderr, __VA_ARGS__); \
+    fprintf (stderr, "\n"); \
+  } while (0)
+
+#define errx(code, ...) do { \
+    fprintf (stderr, __VA_ARGS__); \
+    fprintf (stderr, "\n"); \
+    exit (code); \
+  } while (0)
+
+#define err errx
+
+#endif /* !_ERR_H_ */