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Viewing changes to debian/patches/05-armel-no-finite-math-only.diff

  • Committer: Bazaar Package Importer
  • Author(s): Andres Mejia
  • Date: 2011-07-28 19:14:03 UTC
  • mfrom: (1.2.1 upstream) (10 maverick)
  • mto: This revision was merged to the branch mainline in revision 11.
  • Revision ID: james.westby@ubuntu.com-20110728191403-jbdct7czfqvei8q6
Tags: 3.98.4+repack2-1
* Update debian/copyright to reflect replacement of portableio code from
  upstream.
* Update README.source to mention change of portableio code.

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debian/patches/05-armel-no-finite-math-only.diff
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A bug present in gcc-4.[123] up to 4.3.3 makes a buggy optimization for
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single-precision floats when -ffinite-math-only (enabled by -ffast-math)
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Symptom: lame -V0 produces silent output files.
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Refs:
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https://sourceforge.net/tracker/index.php?func=detail&aid=2681646&group_id=290&atid=100290
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https://trac.xiph.org/ticket/1526
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39501
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        Martin Guy <martinwguy@yahoo.it> 19 March 2009
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--- lame-3.98.2/configure.old   2008-06-29 22:40:05.000000000 +0100
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+++ lame-3.98.2/configure       2009-03-19 19:00:42.000000000 +0000
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@@ -30189,6 +30189,15 @@
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                CFLAGS="-Wall ${CFLAGS}"
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        fi
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+       # Work round buggy softfloat optimization in ARM EABI compilers
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+       # -gnueabi in only gcc-4.1 onwards
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+       FAST_MATH="-ffast-math"
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+       case "${host}" in
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+       arm*-gnueabi)
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+               FAST_MATH="-ffast-math -fno-finite-math-only"
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+               ;;
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+       esac
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+
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        # GCC version specific generic options
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        case "${GCC_version}" in
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        2.96*)
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@@ -30217,12 +30226,12 @@
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                        ;;
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                esac
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-               OPTIMIZATION="-O3 ${OMIT_FRAME_POINTER} -ffast-math"
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+               OPTIMIZATION="-O3 ${OMIT_FRAME_POINTER} ${FAST_MATH}"
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                OPTIMIZATION_FULL="-fmove-all-movables -freduce-all-givs \
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                        -fbranch-count-reg -fforce-addr -fforce-mem"
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                ;;
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        4.*)
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-               OPTIMIZATION="-O3 -fomit-frame-pointer -ffast-math"
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+               OPTIMIZATION="-O3 -fomit-frame-pointer ${FAST_MATH}"
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                OPTIMIZATION_FULL="-fbranch-count-reg -fforce-addr"
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                ;;
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        *)