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patches/gcc/4.3.1/110-trampolinewarn.patch
author "Yann E. MORIN" <yann.morin.1998@free.fr>
Tue Mar 11 22:11:43 2014 +0100 (2014-03-11)
changeset 3293 e11a8a2e225d
parent 746 b150d6f590fc
permissions -rw-r--r--
comptools: do not force build of make-3.81 unless really needed

On systems with make-3.82, we forcibly force the build and the use
of make-3.81

But some newer tools break when building with make-3.81. For example,
eglibc-3.18 breaks.

Introduce a new blind options that tools may select if they require
make-3.81. If the system does not have make-3.81, and this option is
selected, then we force the build of make-3.81. Otherwise, we leave
it to the user to decide on his own.

Note that no component selects this option for now. It will come in
later patches as we find them.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> 
     1 Original patch from gentoo: gentoo/src/patchsets/gcc/4.3.1/gentoo/00_all_gcc-trampolinewarn.patch

     2 	This trivial patch causes gcc to emit a warning whenever

     3 	it generates a trampoline.  These are otherwise hard to

     4 	locate.  It is rigged to default ON - to have it default

     5 	to OFF remove the text 'Init(1)' from the common.opt

     6 	patch, leaving just 'Common Var(warn_trampolines)'.

     7 	Kevin F. Quinn <kevquinn@gentoo.org> 17 Jan 2006

     8 

     9 diff -durN gcc-4.3.1.orig/gcc/builtins.c gcc-4.3.1/gcc/builtins.c

    10 --- gcc-4.3.1.orig/gcc/builtins.c	2008-04-23 00:36:27.000000000 +0200

    11 +++ gcc-4.3.1/gcc/builtins.c	2008-06-10 14:56:54.000000000 +0200

    12 @@ -5662,6 +5662,9 @@

    13    trampolines_created = 1;

    14    INITIALIZE_TRAMPOLINE (r_tramp, r_func, r_chain);

    15  

    16 +  if (warn_trampolines)

    17 +    warning (OPT_Wtrampolines, "generating trampoline in object (requires executable stack)");

    18 +

    19    return const0_rtx;

    20  }

    21  

    22 diff -durN gcc-4.3.1.orig/gcc/common.opt gcc-4.3.1/gcc/common.opt

    23 --- gcc-4.3.1.orig/gcc/common.opt	2008-01-22 15:11:44.000000000 +0100

    24 +++ gcc-4.3.1/gcc/common.opt	2008-06-10 14:56:54.000000000 +0200

    25 @@ -182,6 +182,10 @@

    26  Common Var(warn_system_headers) Warning

    27  Do not suppress warnings from system headers

    28  

    29 +Wtrampolines

    30 +Common Var(warn_trampolines) Init(1)

    31 +Warn whenever a trampoline is generated

    32 +

    33  Wuninitialized

    34  Common Var(warn_uninitialized) Warning

    35  Warn about uninitialized automatic variables
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