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2eb99e4ea5
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4543 b3059339-0415-0410-9bf9-f77b7e298cf2
123 lines
4.0 KiB
HTML
123 lines
4.0 KiB
HTML
<HTML>
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<BODY BGCOLOR=WHITE>
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<FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
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<P>
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<B>Question:</B> What is GCC 2.96 ? I can't find it at GNU site.
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</P>
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<P>
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<B>Answer:</B> Read the <A HREF="http://gcc.gnu.org/gcc-2.96.html">official answer from GNU GCC team.</A>
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</P>
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<P>
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<B>Question:</B> What is the problem with GCC 2.96 ? And with 3.x ?
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</P>
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<P>
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<B>Answer:</B>
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</P>
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<P>Read in MySQL documentation :</P>
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<P><I>
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Compiler Advisory: Several of our users have reported random crashes and
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table corruption with MySQL binaries compiled with gcc two-dot-nine-six on
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the x86 Linux platform. Although we were unable to duplicate the problems
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ourselves or understand their exact cause, we suspect with a great degree of
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confidence that the problem was compiler related. Replacing the faulty binary
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with our binary always eliminated the problem.
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</I></P>
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<P>
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And for the people, who periodically asks what are the exact problems with
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gcc 2.96, my answer: <I>we don't know exactly.</I>
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There were various problems and new problems / bugs come up periodically.
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It is <I>not a single bug/problem</I>. We just see various bugreports, mostly
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gcc internal bugs, compiler syntax errors in source or bad code compiled. They
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all are solved using different version of gcc. I understand that gcc 2.96
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has different default optimization flags and they conflicts with our inline
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asm code, but we can't fix them, and we really don't want to fix them as they
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work with other compilers or gcc versions, and the fix may cause speed loss.
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</P>
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<P>
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I think that the gcc 2.96 should be fixed to be option-compatible with other
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releases, but redhat guys refused to do it. If someone interested - ask
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Eugene K., avifile author, he has a long mailing with them, because they had
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the same problems with avifile. Finally he changed avifile source to
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<I>workaround</I> gcc 2.96 bugs...
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We simply has no interest and time to do it.
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</P>
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<P>
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Ah, and about the pipe-in-comment bug: it wasn't really our bug.
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I've talked one of gcc maintainers, and he told me that gcc 2.96 and 3.x
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supports intel asm syntax, and it caused the pipe bug. But it <I>is</I> a bug,
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because gcc <I>silently</I>, without any warning, ignored the whole asm block!
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</P>
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<P>
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Other gcc 3.x problems comes from broken libstdc++ or glibc header (std_*.h)
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installation. They are not our fault. MPlayer compiles and works well with
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gcc 3.x versions. <B>Only 2.96 is broken</B>, but it depends on many environment
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elements, including gcc 2.96 release number, enabled mplayer features, etc.
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<I>If it works for you using gcc 2.96, it doesn't mean it will work for everyone.</I>
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</P>
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<P><B>Answer 2:</B></P>
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<P>
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Also read <A HREF="users_against_developers.html">this</A> text !!!</P>
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<P>
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<B>Question:</B> No! You are wrong! Everything works with gcc 2.96 <I>but</I> MPlayer
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</P>
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<P>
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<B>Answer:</B>
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</P>
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<P>
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No. You are wrong!
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Several projects (mainly which source contains high optimized inline asm code)
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had problems with gcc 2.96. For example: avifile, MESA / DRI, Wine, ffmpeg, lame, NuppelVideo.
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But other projects already workarounded gcc bugs (changed code which
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triggered compiler bugs) so they work for now.
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</P>
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<P>
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<B>Question:</B> No! You are wrong! Everything works with gcc 2.96 <I>including</I> MPlayer
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</P>
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<P>
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<B>Answer:</B>
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</P>
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Good. Be happy. But you must know, it depends on many environment
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elements, including gcc 2.96 release number, enabled mplayer features, etc.
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<I>If it works for you using gcc 2.96, it doesn't mean it will work for everyone!</I>
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It only means that you are lucky, until you find a problem. But don't forget the
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<B>No.1 rule of gcc 2.96 users: NEVER REPORT BUGS OR PROBLEMS IF YOU ARE USING GCC 2.96</B>
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<P>
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<B>Question:</B> Ok. Understood. But I want to give it a try... how to compile with gcc 2.96?
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</P>
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<P>
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<B>Answer:</B> Really? Are you sure? Ok. You know... here is it: ./configure --disable-gcc-checking
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</P>
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<P>
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<B>Question:</B> No! I don't agree with you, because ...
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</P>
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<P>
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<B>Answer:</B> It doesn't matter. Keep your commets for yourself. We're not interested in gcc 2.96 stories.
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</P>
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</BODY>
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