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configure.ac: Add big fat warning message with explanation when building against an external copy of ffmpeg. Fixes #4...

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Original commit message from CVS:
* configure.ac:
Add big fat warning message with explanation when building
against an external copy of ffmpeg. Fixes #407779.
This commit is contained in:
Tim-Philipp Müller 2007-10-12 14:44:55 +00:00
parent 8f95bd95cc
commit 62c4f57092
2 changed files with 38 additions and 0 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2007-10-12 Tim-Philipp Müller <tim at centricular dot net>
* configure.ac:
Add big fat warning message with explanation when building
against an external copy of ffmpeg. Fixes #407779.
2007-10-10 Wim Taymans <wim.taymans@gmail.com> 2007-10-10 Wim Taymans <wim.taymans@gmail.com>
Patch by: Tuomas Kulve <tuomas dot kulve at movial dot fi> Patch by: Tuomas Kulve <tuomas dot kulve at movial dot fi>

32
configure.ac
View file

@ -203,6 +203,37 @@ if test "x$with_system_ffmpeg" = "xyes"; then
AC_DEFINE([FFMPEG_SOURCE], ["system install"], [Describes where the FFmpeg libraries come from.]) AC_DEFINE([FFMPEG_SOURCE], ["system install"], [Describes where the FFmpeg libraries come from.])
HAVE_FFMPEG_UNINSTALLED=0 HAVE_FFMPEG_UNINSTALLED=0
AC_MSG_NOTICE([Using system-installed FFMpeg code]) AC_MSG_NOTICE([Using system-installed FFMpeg code])
AC_MSG_WARN([
======================================================================
WARNING: you have chosen to build gst-ffmpeg against a random
external version of ffmpeg instead of building it against the tested
internal ffmpeg snapshot that is included with gst-ffmpeg.
This is a very bad idea. So bad in fact that words cannot express
just how bad it is. Suffice to say that it is BAD.
The GStreamer developers cannot and will not support a gst-ffmpeg
built this way. Any bug reports that indicate there is an external
version of ffmpeg involved will be closed immediately without further
investigation.
The reason such a setup can't be supported is that the ffmpeg API
and ABI is in constant flux, yet there aren't any official releases
of the ffmpeg library to develop against. This makes it impossible
to guarantee that gst-ffmpeg will work reliably, or even compile,
with a randomly picked version ffmpeg. Even if gst-ffmpeg compiles
and superficially appears to work fine against your chosen external
ffmpeg version, that might just not be the case on other systems, or
even the same system at a later time, or when using decoders,
encoders, demuxers or muxers that have not been tested.
Please do not create or distribute binary packages of gst-ffmpeg
that link against an external ffmpeg. Thank you!
======================================================================
])
dnl No, this is not too extreme, we want people to see and read the above
sleep 15
else else
FFMPEG_CFLAGS="-I \$(top_srcdir)/gst-libs/ext/ffmpeg/libavformat \ FFMPEG_CFLAGS="-I \$(top_srcdir)/gst-libs/ext/ffmpeg/libavformat \
-I \$(top_srcdir)/gst-libs/ext/ffmpeg/libavutil \ -I \$(top_srcdir)/gst-libs/ext/ffmpeg/libavutil \
@ -245,3 +276,4 @@ tests/Makefile
tests/check/Makefile tests/check/Makefile
) )
AC_OUTPUT AC_OUTPUT