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patches/gcc/4.3.2/100-alpha-mieee-default.patch
author "Yann E. MORIN" <yann.morin.1998@free.fr>
Sat Jan 04 01:02:57 2014 +0100 (2014-01-04)
changeset 3271 c65dc9b98841
parent 746 b150d6f590fc
permissions -rw-r--r--
cc/gcc: diable libsanitizer without NPTL

gcc-4.8 comes with a new library to sanitise memory access:
- heap-, stack-, and global-buffer overflow, use-after-free
- data-races between threads

This library requires some _np parts of the API, which are not
implemented in the (old) LinuxThreads, which is still available
in uClibc.

Since NPTL requires a i486 or above, i386 are stuck with using LT,
which precludes building the libsanitizer.

Disable libsanitizer, a bit like libatomic is.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Niels Penneman <niels@penneman.org> 
     1 Original patch from gentoo: gentoo/src/patchsets/gcc/4.3.1/gentoo/00_all_gcc-4.1-alpha-mieee-default.patch

     2 Set the default behavior on alpha to use -mieee since the large majority of

     3 time we want this (bad/weird things can happen with packages built without

     4 -mieee).

     5 

     6 To satisfy those people who may not want -mieee forced on them all the time,

     7 we also provide -mno-ieee.

     8 

     9 Patch by Mike Frysinger <vapier@gentoo.org>

    10 

    11 diff -durN gcc-4.3.1.orig/gcc/config/alpha/alpha.h gcc-4.3.1/gcc/config/alpha/alpha.h

    12 --- gcc-4.3.1.orig/gcc/config/alpha/alpha.h	2007-12-06 14:25:37.000000000 +0100

    13 +++ gcc-4.3.1/gcc/config/alpha/alpha.h	2008-06-10 14:56:36.000000000 +0200

    14 @@ -95,6 +95,8 @@

    15    while (0)

    16  #endif

    17  

    18 +#define CPP_SPEC "%{!no-ieee:-mieee}"

    19 +

    20  #define WORD_SWITCH_TAKES_ARG(STR)		\

    21   (!strcmp (STR, "rpath") || DEFAULT_WORD_SWITCH_TAKES_ARG(STR))

    22  

    23 diff -durN gcc-4.3.1.orig/gcc/config/alpha/alpha.opt gcc-4.3.1/gcc/config/alpha/alpha.opt

    24 --- gcc-4.3.1.orig/gcc/config/alpha/alpha.opt	2007-08-02 12:49:31.000000000 +0200

    25 +++ gcc-4.3.1/gcc/config/alpha/alpha.opt	2008-06-10 14:56:36.000000000 +0200

    26 @@ -39,7 +39,7 @@

    27  Request IEEE-conformant math library routines (OSF/1)

    28  

    29  mieee

    30 -Target Report RejectNegative Mask(IEEE)

    31 +Target Report Mask(IEEE)

    32  Emit IEEE-conformant code, without inexact exceptions

    33  

    34  mieee-with-inexact
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