id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc	blockedby	blocking	reproduced	analyzed
2049	"msvc: --extra-cflags=""-MD"" leads to unresolved externals"	Piroxiljin		"Summary of the bug:
Compilation ffmpeg with toolchain=msvc leads to unresolved external simbols.

How to reproduce:
I use guide from this page: http://blogs.gnome.org/rbultje/2012/09/27/microsoft-visual-studio-support-in-ffmpeg-and-libav/

I.e.
* Open MSVC2010 command prompt
* Run mingw-msys shell 
{{{c:\mingw\msys\1.0\msys.bat}}}
* configure ffmpeg
{{{./configure --toolchain=msvc --extra-cflags=""-MD""}}}
Waiting, while configuration has done.
* make

At the end of building I have error messages:
{{{
LD      ffmpeg_g.exe
LINK : warning LNK4098: defaultlib 'LIBCMT' conflicts with use of other libs; us
e /NODEFAULTLIB:library
libavutil.a(opt.o) : error LNK2001: unresolved external symbol __imp__avpriv_snp
rintf
libavutil.a(pixdesc.o) : error LNK2001: unresolved external symbol __imp__avpriv
_snprintf
libavutil.a(samplefmt.o) : error LNK2001: unresolved external symbol __imp__avpr
iv_snprintf

...

ffmpeg.o : error LNK2019: unresolved external symbol __imp__avpriv_vsnprintf ref
erenced in function _update_benchmark
libavformat.a(aviobuf.o) : error LNK2001: unresolved external symbol __imp__avpr
iv_vsnprintf
libavformat.a(utils.o) : error LNK2001: unresolved external symbol __imp__avpriv
_vsnprintf
libavformat.a(rtpproto.o) : error LNK2001: unresolved external symbol __imp__avp
riv_vsnprintf
libavformat.a(rtmpproto.o) : error LNK2019: unresolved external symbol __imp__av
priv_strtod referenced in function _rtmp_write_amf_data
libavformat.a(sbgdec.o) : error LNK2001: unresolved external symbol __imp__avpri
v_strtod
libavutil.a(parseutils.o) : error LNK2001: unresolved external symbol __imp__avp
riv_strtod
libavutil.a(eval.o) : error LNK2001: unresolved external symbol __imp__avpriv_st
rtod
ffmpeg_g.exe : fatal error LNK1120: 3 unresolved externals
make: *** [ffmpeg_g.exe] Error 1
}}}"	defect	closed	normal	build system	git-master	fixed	msvc				0	0