Added a portable snprintf implementenation in case it's not present.

configure.in

@@ -132,7 +132,7 @@ AC_TYPE_UID_T
 dnl Checks for library functions.
 AC_PROG_GCC_TRADITIONAL
 AC_TYPE_SIGNAL
-AC_CHECK_FUNCS(select socket strdup strerror strtol uname cfmakeraw ioperm)
+AC_CHECK_FUNCS(select socket strdup strerror strtol uname cfmakeraw snprintf)
 
 dnl Check for various defines and features
 

shared/Makefile.am

@@ -1,2 +1,2 @@
 noinst_LIBRARIES = libLCDstuff.a
-libLCDstuff_a_SOURCES = LL.c LL.h sockets.c sockets.h str.c str.h debug.h report.c report.h
+libLCDstuff_a_SOURCES = LL.c LL.h sockets.c sockets.h str.c str.h debug.h report.c report.h snprintf.c snprintf.h

shared/debug.h

@@ -1,6 +1,9 @@
 #ifndef DEBUG_H
 #define DEBUG_H
 
+#include <stdarg.h>
+#include <stdio.h>
+
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
@@ -21,11 +24,6 @@ This way, the global DEBUG macro is off but is locally enabled in
 certains parts of the software.
 */
 
-#ifdef DEBUG
-#include <stdarg.h>
-#include <stdio.h>
-#endif
-
 static inline void debug(const char *format, .../*args*/) {
 #ifdef DEBUG
   va_list ap;

shared/snprintf.h

@@ -0,0 +1,30 @@
+#ifndef _PORTABLE_SNPRINTF_H_
+#define _PORTABLE_SNPRINTF_H_
+
+#define PORTABLE_SNPRINTF_VERSION_MAJOR 2
+#define PORTABLE_SNPRINTF_VERSION_MINOR 2
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#ifdef HAVE_SNPRINTF
+#include <stdio.h>
+#else
+extern int snprintf(char *, size_t, const char *, /*args*/ ...);
+extern int vsnprintf(char *, size_t, const char *, va_list);
+#endif
+
+#if defined(HAVE_SNPRINTF) && defined(PREFER_PORTABLE_SNPRINTF)
+extern int portable_snprintf(char *str, size_t str_m, const char *fmt, /*args*/ ...);
+extern int portable_vsnprintf(char *str, size_t str_m, const char *fmt, va_list ap);
+#define snprintf  portable_snprintf
+#define vsnprintf portable_vsnprintf
+#endif
+
+extern int asprintf  (char **ptr, const char *fmt, /*args*/ ...);
+extern int vasprintf (char **ptr, const char *fmt, va_list ap);
+extern int asnprintf (char **ptr, size_t str_m, const char *fmt, /*args*/ ...);
+extern int vasnprintf(char **ptr, size_t str_m, const char *fmt, va_list ap);
+
+#endif