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Leverage MinGW's llrint() in Cygwin compilations.

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Originally committed as revision 10878 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Víctor Paesa 2007-10-30 20:07:31 +00:00
parent e76e2bbc09
commit 29c3d42b42
1 changed files with 13 additions and 4 deletions
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doc/general.texi
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@ -530,27 +530,36 @@ Then you can easily test FFmpeg with Wine
@subsection Compilation under Cygwin
Cygwin works very much like Unix.
The main issue with Cygwin is that newlib, its C library, does not
contain llrint(). However, it is possible to leverage the
implementation in MinGW.
Just install your Cygwin with all the "Base" packages, plus the
following "Devel" ones:
@example
binutils, gcc-core, make, subversion
binutils, gcc-core, make, subversion, mingw-runtime
@end example
Do not install binutils-20060709-1 (they are buggy on shared builds);
use binutils-20050610-1 instead.
Then create a small library that just contains llrint():
@example
ar x /usr/lib/mingw/libmingwex.a llrint.o
ar cq /usr/local/lib/libllrint.a llrint.o
@end example
Then run
@example
./configure --enable-static --disable-shared
./configure --enable-static --disable-shared --extra-ldflags='-L /usr/local/lib' --extra-libs='-l llrint'
@end example
to make a static build or
@example
./configure --enable-shared --disable-static
./configure --enable-shared --disable-static --extra-ldflags='-L /usr/local/lib' --extra-libs='-l llrint'
@end example
to build shared libraries.