1 \input texinfo @c -*- texinfo -*-
3 @settitle Platform Specific information
5 @center @titlefont{Platform Specific information}
14 Some parts of FFmpeg cannot be built with version 2.15 of the GNU
15 assembler which is still provided by a few AMD64 distributions. To
16 make sure your compiler really uses the required version of gas
17 after a binutils upgrade, run:
20 $(gcc -print-prog-name=as) --version
23 If not, then you should install a different compiler that has no
24 hard-coded path to gas. In the worst case pass @code{--disable-asm}
29 BSD make will not build FFmpeg, you need to install and use GNU Make
32 @section (Open)Solaris
34 GNU Make is required to build FFmpeg, so you have to invoke (@command{gmake}),
35 standard Solaris Make will not work. When building with a non-c99 front-end
36 (gcc, generic suncc) add either @code{--extra-libs=/usr/lib/values-xpg6.o}
37 or @code{--extra-libs=/usr/lib/64/values-xpg6.o} to the configure options
38 since the libc is not c99-compliant by default. The probes performed by
39 configure may raise an exception leading to the death of configure itself
40 due to a bug in the system shell. Simply invoke a different shell such as
41 bash directly to work around this:
48 @section Darwin (Mac OS X, iPhone)
50 The toolchain provided with Xcode is sufficient to build the basic
53 Mac OS X on PowerPC or ARM (iPhone) requires a preprocessor from
54 @url{http://github.com/yuvi/gas-preprocessor} to build the optimized
55 assembler functions. Just download the Perl script and put it somewhere
56 in your PATH, FFmpeg's configure will pick it up automatically.
58 Mac OS X on amd64 and x86 requires @command{yasm} to build most of the
59 optimized assembler functions. @uref{http://www.finkproject.org/, Fink},
60 @uref{http://www.gentoo.org/proj/en/gentoo-alt/prefix/bootstrap-macos.xml, Gentoo Prefix},
61 @uref{http://mxcl.github.com/homebrew/, Homebrew}
62 or @uref{http://www.macports.org, MacPorts} can easily provide it.
67 Using a cross-compiler is preferred for various reasons.
68 @url{http://www.delorie.com/howto/djgpp/linux-x-djgpp.html}
73 For information about compiling FFmpeg on OS/2 see
74 @url{http://www.edm2.com/index.php/FFmpeg}.
79 To get help and instructions for building FFmpeg under Windows, check out
80 the FFmpeg Windows Help Forum at
81 @url{http://ffmpeg.arrozcru.org/}.
83 @section Native Windows compilation using MinGW or MinGW-w64
85 FFmpeg can be built to run natively on Windows using the MinGW or MinGW-w64
86 toolchains. Install the latest versions of MSYS and MinGW or MinGW-w64 from
87 @url{http://www.mingw.org/} or @url{http://mingw-w64.sourceforge.net/}.
88 You can find detailed installation instructions in the download section and
95 @item Building natively using MSYS can be sped up by disabling implicit rules
96 in the Makefile by calling @code{make -r} instead of plain @code{make}. This
97 speed up is close to non-existent for normal one-off builds and is only
98 noticeable when running make for a second time (for example during
101 @item In order to compile FFplay, you must have the MinGW development library
102 of @uref{http://www.libsdl.org/, SDL} and @code{pkg-config} installed.
104 @item By using @code{./configure --enable-shared} when configuring FFmpeg,
105 you can build the FFmpeg libraries (e.g. libavutil, libavcodec,
106 libavformat) as DLLs.
110 @section Microsoft Visual C++
112 FFmpeg can be built with MSVC using a C99-to-C89 conversion utility and
115 You will need the following prerequisites:
118 @item @uref{https://github.com/rbultje/c99-to-c89/, C99-to-C89 Converter & Wrapper}
119 @item @uref{http://code.google.com/p/msinttypes/, msinttypes}
120 @item @uref{http://www.mingw.org/, MSYS}
121 @item @uref{http://yasm.tortall.net/, YASM}
122 @item @uref{http://gnuwin32.sourceforge.net/packages/bc.htm, bc for Windows} if
123 you want to run @uref{fate.html, FATE}.
126 To set up a proper MSVC environment in MSYS, you simply need to run
127 @code{msys.bat} from the Visual Studio command prompt.
129 Place @code{makedef}, @code{c99wrap.exe}, @code{c99conv.exe}, and @code{yasm.exe}
130 somewhere in your @code{PATH}.
132 Next, make sure @code{inttypes.h} and any other headers and libs you want to use
133 are located in a spot that MSVC can see. Do so by modifying the @code{LIB} and
134 @code{INCLUDE} environment variables to include the @strong{Windows} paths to
135 these directories. Alternatively, you can try and use the
136 @code{--extra-cflags}/@code{--extra-ldflags} configure options.
141 ./configure --toolchain=msvc
146 If you wish to compile static libraries, add @code{--enable-shared} to your
147 configure options. Note that due to the way MSVC handles DLL imports and
148 exports, you cannot compile static and shared libraries at the same time, and
149 enabling shared libraries will automatically disable the static ones.
155 @item It is possible that coreutils' @code{link.exe} conflicts with MSVC's linker.
156 You can find out by running @code{which link} to see which @code{link.exe} you
157 are using. If it is located at @code{/bin/link.exe}, then you have the wrong one
158 in your @code{PATH}. Either move or remove that copy, or make sure MSVC's
159 @code{link.exe} takes precedence in your @code{PATH} over coreutils'.
161 @item If you wish to build with zlib support, you will have to grab a compatible
162 zlib binary from somewhere, with an MSVC import lib, or if you wish to link
163 statically, you can follow the instructions below to build a compatible
164 @code{zlib.lib} with MSVC. Regardless of which method you use, you must still
165 follow step 3, or compilation will fail.
167 @item Grab the @uref{http://zlib.net/, zlib sources}.
168 @item Edit @code{win32/Makefile.msc} so that it uses -MT instead of -MD, since
169 this is how FFmpeg is built as well.
170 @item Edit @code{zconf.h} and remove its inclusion of @code{unistd.h}. This gets
171 erroneously included when building FFmpeg.
172 @item Run @code{nmake -f win32/Makefile.msc}.
173 @item Move @code{zlib.lib}, @code{zconf.h}, and @code{zlib.h} to somewhere MSVC
177 @item FFmpeg has been tested with Visual Studio 2010 and 2012, Pro and Express.
178 Anything else is not officially supported.
182 @subsection Linking to FFmpeg with Microsoft Visual C++
184 If you plan to link with MSVC-built static libraries, you will need
185 to make sure you have @code{Runtime Library} set to
186 @code{Multi-threaded (/MT)} in your project's settings.
188 FFmpeg headers do not declare global data for Windows DLLs through the usual
189 dllexport/dllimport interface. Such data will be exported properly while
190 building, but to use them in your MSVC code you will have to edit the
191 appropriate headers and mark the data as dllimport. For example, in
192 libavutil/pixdesc.h you should have:
194 extern __declspec(dllimport) const AVPixFmtDescriptor av_pix_fmt_descriptors[];
197 You will also need to define @code{inline} to something MSVC understands:
199 #define inline __inline
202 Also note, that as stated in @strong{Microsoft Visual C++}, you will need
203 an MSVC-compatible @uref{http://code.google.com/p/msinttypes/, inttypes.h}.
205 If you plan on using import libraries created by dlltool, you must
206 set @code{References} to @code{No (/OPT:NOREF)} under the linker optimization
207 settings, otherwise the resulting binaries will fail during runtime.
208 This is not required when using import libraries generated by @code{lib.exe}.
209 This issue is reported upstream at
210 @url{http://sourceware.org/bugzilla/show_bug.cgi?id=12633}.
212 To create import libraries that work with the @code{/OPT:REF} option
213 (which is enabled by default in Release mode), follow these steps:
217 @item Open the @emph{Visual Studio Command Prompt}.
219 Alternatively, in a normal command line prompt, call @file{vcvars32.bat}
220 which sets up the environment variables for the Visual C++ tools
221 (the standard location for this file is something like
222 @file{C:\Program Files (x86_\Microsoft Visual Studio 10.0\VC\bin\vcvars32.bat}).
224 @item Enter the @file{bin} directory where the created LIB and DLL files
227 @item Generate new import libraries with @command{lib.exe}:
230 lib /machine:i386 /def:..\lib\foo-version.def /out:foo.lib
233 Replace @code{foo-version} and @code{foo} with the respective library names.
237 @anchor{Cross compilation for Windows with Linux}
238 @section Cross compilation for Windows with Linux
240 You must use the MinGW cross compilation tools available at
241 @url{http://www.mingw.org/}.
243 Then configure FFmpeg with the following options:
245 ./configure --target-os=mingw32 --cross-prefix=i386-mingw32msvc-
247 (you can change the cross-prefix according to the prefix chosen for the
250 Then you can easily test FFmpeg with @uref{http://www.winehq.com/, Wine}.
252 @section Compilation under Cygwin
254 Please use Cygwin 1.7.x as the obsolete 1.5.x Cygwin versions lack
255 llrint() in its C library.
257 Install your Cygwin with all the "Base" packages, plus the
258 following "Devel" ones:
260 binutils, gcc4-core, make, git, mingw-runtime, texi2html
263 In order to run FATE you will also need the following "Utils" packages:
268 If you want to build FFmpeg with additional libraries, download Cygwin
269 "Devel" packages for Ogg and Vorbis from any Cygwin packages repository:
271 libogg-devel, libvorbis-devel
274 These library packages are only available from
275 @uref{http://sourceware.org/cygwinports/, Cygwin Ports}:
278 yasm, libSDL-devel, libfaac-devel, libaacplus-devel, libgsm-devel, libmp3lame-devel,
279 libschroedinger1.0-devel, speex-devel, libtheora-devel, libxvidcore-devel
282 The recommendation for x264 is to build it from source, as it evolves too
283 quickly for Cygwin Ports to be up to date.
285 @section Crosscompilation for Windows under Cygwin
287 With Cygwin you can create Windows binaries that do not need the cygwin1.dll.
289 Just install your Cygwin as explained before, plus these additional
292 gcc-mingw-core, mingw-runtime, mingw-zlib
295 and add some special flags to your configure invocation.
297 For a static build run
299 ./configure --target-os=mingw32 --extra-cflags=-mno-cygwin --extra-libs=-mno-cygwin
302 and for a build with shared libraries
304 ./configure --target-os=mingw32 --enable-shared --disable-static --extra-cflags=-mno-cygwin --extra-libs=-mno-cygwin