X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/07243717e26bda497d5a8b325c2e6acf4ee033cf..52c71b808f1c7fd161bb0bc5082683320f15dbb2:/include/wx/wxchar.h

diff --git a/include/wx/wxchar.h b/include/wx/wxchar.h
index 03a406d0ff..88ea300646 100644
--- a/include/wx/wxchar.h
+++ b/include/wx/wxchar.h
@@ -594,6 +594,15 @@ WXDLLEXPORT bool wxOKlibc(); // for internal use
 // printf() family saga
 // ----------------------------------------------------------------------------
 
+/*
+   For some systems vsnprintf() exists in the system libraries but not in the
+   headers, so we need to declare it ourselves to be able to use it.
+ */
+#ifndef HAVE_VSNPRINTF_DECL
+    extern "C"
+    int vsnprintf(char *str, size_t size, const char *format, va_list ap);
+#endif // !HAVE_VSNPRINTF_DECL
+
 /*
    First of all, we always want to define safe snprintf() function to be used
    instead of sprintf(). Some compilers already have it (or rather vsnprintf()