From dac71de305ea729c539a007931878e4fd1a26e73 Mon Sep 17 00:00:00 2001
From: nu774 <honeycomb77@gmail.com>
Date: Fri, 11 Jan 2013 17:33:54 +0900
Subject: [PATCH] support for i686-pc-mingw32 (missing _vscprintf)

---
 configure.ac       |  2 +-
 src/compat_win32.c | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 4685cca..e065b00 100644
--- a/configure.ac
+++ b/configure.ac
@@ -32,7 +32,7 @@ AC_CHECK_TYPES([ptrdiff_t])
 
 AC_SYS_LARGEFILE
 AC_FUNC_FSEEKO
-AC_CHECK_FUNCS([gettimeofday nl_langinfo strdup])
+AC_CHECK_FUNCS([gettimeofday nl_langinfo strdup _vscprintf])
 AC_CHECK_FUNC(getopt_long)
 AM_CONDITIONAL([FDK_NO_GETOPT_LONG],[test "$ac_cv_func_getopt_long" != "yes"])
 AC_SEARCH_LIBS([aacEncOpen],[fdk-aac],[],[],[])
diff --git a/src/compat_win32.c b/src/compat_win32.c
index 6802730..25c13f0 100644
--- a/src/compat_win32.c
+++ b/src/compat_win32.c
@@ -12,6 +12,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdarg.h>
+#include <assert.h>
 #include <io.h>
 #include <fcntl.h>
 #include <sys/timeb.h>
@@ -92,6 +93,20 @@ char *aacenc_to_utf8(const char *s)
     return _strdup(s);
 }
 
+#if defined(__MINGW32__) && !defined(HAVE__VSCPRINTF)
+int _vscprintf(const char *fmt, va_list ap) 
+{
+    static int (*fp_vscprintf)(const char *, va_list) = 0;
+    if (!fp_vscprintf) {
+        HANDLE h = GetModuleHandleA("msvcrt.dll");
+        FARPROC fp = GetProcAddress(h, "_vscprintf");
+        InterlockedCompareExchangePointer(&fp_vscprintf, fp, 0);
+    }
+    assert(fp_vscprintf);
+    return fp_vscprintf(fmt, ap);
+}
+#endif
+
 int aacenc_fprintf(FILE *fp, const char *fmt, ...)
 {
     va_list ap;
-- 
2.30.2