Victor Paesa wrote: > I found another way: leverage the llrint() implementation in MinGW. > > a) We need first to download the mingw-runtime Cygwin package. > > b) Then we create a small library: > > ar x /usr/lib/mingw/libmingwex.a llrint.o > ar cq /usr/local/lib/libllrint.a llrint.o > > c) And finally, we use that library in FFmpeg configure line: > > --extra-ldflags='-L /usr/local/lib' --extra-libs='-l llrint' > > It might not be the most elegant solution, but it is strightforward, and > it works.
This is a very, very bad idea. MinGW uses a completely different and incompatible C runtime (MSVCRT) and so any MinGW object that calls into the runtime (e.g. malloc(), open(), printf(), etc) will crash and burn hard when linked to the Cygwin runtime. It is simple blind luck that llrint() is apparently a self-contained function that has no calls to any C runtime support functions, but this is not a practical technique in general. If you want to re-use the MinGW implementation, do it by compiling the source with Cygwin's gcc, not by extracting an object from a library. Brian -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
