From 2f821b036c7689c1e1bc6a8da96a28e8772f7668 Mon Sep 17 00:00:00 2001 From: Víctor Paesa Date: Tue, 16 Mar 2010 18:32:52 +0000 Subject: Add compilation hints for Cygwin 1.7 and remove the ones for 1.5 Originally committed as revision 22567 to svn://svn.ffmpeg.org/ffmpeg/trunk --- doc/general.texi | 33 ++++++++++----------------------- 1 file changed, 10 insertions(+), 23 deletions(-) (limited to 'doc/general.texi') diff --git a/doc/general.texi b/doc/general.texi index def9965d81..53af7caed1 100644 --- a/doc/general.texi +++ b/doc/general.texi @@ -924,14 +924,13 @@ Then you can easily test FFmpeg with Wine @subsection Compilation under Cygwin -The main issue with the 1.5.x Cygwin versions is that newlib, its C library, -does not contain llrint(). You need to upgrade to the unstable 1.7.x versions, -or leverage the implementation in MinGW (as explained below). +Please use Cygwin 1.7.x as the obsolete 1.5.x Cygwin versions lack +llrint() in its C library. -Just install your Cygwin with all the "Base" packages, plus the +Install your Cygwin with all the "Base" packages, plus the following "Devel" ones: @example -binutils, gcc-core, make, subversion, mingw-runtime +binutils, gcc4-core, make, subversion, mingw-runtime, texi2html @end example And the following "Utils" one: @@ -939,33 +938,21 @@ And the following "Utils" one: diffutils @end example -The experimental gcc4 package is still buggy, hence please -use the official gcc 3.4.4 or a 4.2.x compiled from source by yourself. - -Install the current binutils-20080624-2 as they work fine (the old -binutils-20060709-1 proved buggy on shared builds). - -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 --extra-ldflags='-L /usr/local/lib' --extra-libs='-l llrint' +./configure --enable-static --disable-shared @end example -to make a static build or +to make a static build. + +The current @code{gcc4-core} package is buggy and needs this flag to build +shared libraries: @example -./configure --enable-shared --disable-static --extra-ldflags='-L /usr/local/lib' --extra-libs='-l llrint' +./configure --enable-shared --disable-static --extra-cflags=-fno-reorder-functions @end example -to build shared libraries. - If you want to build FFmpeg with additional libraries, download Cygwin "Devel" packages for Ogg and Vorbis from any Cygwin packages repository: @example -- cgit v1.2.3