MSVC 2010 (or more precisely, Windows SDK 7.0 which comes with MSVC
2010) sets _WIN32_WINNT to the constant for Windows 7 if nothing is
set. This could lead to the libav configure script detecting and
using functions only present in Windows 7 or newer, which in most
cases isn't desired. If the caller explicitly wants this, the caller
can add the _WIN32_WINNT define via --extra-cflags, setting the desired
version.
---
configure | 1 +
1 file changed, 1 insertion(+)
diff --git a/configure b/configure
index 94804bd..79b0a92 100755
--- a/configure
+++ b/configure
@@ -3197,6 +3197,7 @@ elif check_func_headers stdlib.h _get_doserrno; then
add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf \
_snprintf=avpriv_snprintf \
vsnprintf=avpriv_vsnprintf
+ check_cpp_condition stdlib.h "defined(_WIN32_WINNT)" || add_cppflags
-D_WIN32_WINNT=0x0502
elif check_cpp_condition stddef.h "defined __KLIBC__"; then
libc_type=klibc
fi
--
1.7.9.4
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