win32: Fix *printf & require mingw32-runtime version > 3.13

[vlc] / configure.ac

diff --git a/configure.ac b/configure.ac
index 592bc90ec35383fbc00c749b7a22ac3b42cd99b8..280ed5f4dde122d517142ce542098e48c66cd69f 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -453,6 +453,24 @@ AM_ICONV
 VLC_ADD_CFLAGS([libvlc],[${INCICONV}])
 VLC_ADD_LIBS([libvlc],[${LTLIBICONV}])
 
+dnl Check for broken versions of mingw-runtime compatability library
+if test "${SYS}" = "mingw32"
+then
+    AC_MSG_CHECKING(for broken mingw-runtime)
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <_mingw.h>
+#if (__MINGW32_MAJOR_VERSION == 3) && (__MINGW32_MINOR_VERSION < 14)
+# error Attempting to use mingw-runtime with broken vsnprintf support
+#endif
+        ]])],
+        [AC_MSG_RESULT([Ok])],
+        [AC_MSG_ERROR([Broken mingw-runtime, need > 3.13])],
+])
+    dnl force use of mingw provided c99 *printf over msvcrt
+    CPPFLAGS="${CPPFLAGS} -D__USE_MINGW_ANSI_STDIO=1"
+    CPPFLAGS_save="${CPPFLAGS_save} -D__USE_MINGW_ANSI_STDIO=1"
+fi
+
 dnl Check for the need to include the mingwex lib for mingw32
 if test "${SYS}" = "mingw32"
 then