From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
Subject: bug#24703: fontconfig keeps obfuscated reference to itself,
	not grafted
Date: Sun, 16 Oct 2016 17:06:55 +0200
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To: Mark H Weaver <mhw@netris.org>
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ludo@gnu.org (Ludovic Court=C3=A8s) skribis:

> Mark H Weaver <mhw@netris.org> skribis:
>
>> It turns out there's an obfuscated self-reference to fontconfig's store
>> directory.  Here's an excerpt of the output of "hexdump -C
>> libfontconfig.so.1.9.0":
>>
>> 0000cca0  00 48 b9 2f 67 6e 75 2f  73 74 6f c6 40 48 00 45  |.H./gnu/sto=
.@H.E|
>> 0000ccb0  31 e4 48 89 08 48 b9 72  65 2f 62 34 38 34 6e 48  |1.H..H.re/b=
484nH|
>> 0000ccc0  89 48 08 48 b9 76 6e 39  6e 6e 72 33 64 48 89 48  |.H.H.vn9nnr=
3dH.H|
>> 0000ccd0  10 48 b9 64 63 6c 70 7a  32 66 6d 48 89 48 18 48  |.H.dclpz2fm=
H.H.H|
>> 0000cce0  b9 61 39 79 78 6d 69 6d  67 48 89 48 20 48 b9 32  |.a9yxmimgH.=
H H.2|
>> 0000ccf0  6a 6a 2d 66 6f 6e 74 48  89 48 28 48 b9 63 6f 6e  |jj-fontH.H(=
H.con|
>> 0000cd00  66 69 67 2d 32 48 89 48  30 48 b9 2e 31 31 2e 39  |fig-2H.H0H.=
.11.9|
>> 0000cd10  34 2f 65 48 89 48 38 48  b9 74 63 2f 66 6f 6e 74  |4/eH.H8H.tc=
/font|
>> 0000cd20  73 48 89 48 40 48 8b 04  24 48 8b 18 48 89 c5 48  |sH.H@H..$H.=
.H..H|
>
> See commit 9d50da70608de32d9db0c29859caec6f2cddb95f in WordNet:
> -fno-builtin-strcpy is the solution I found.

Simple test case:


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Content-Type: text/plain
Content-Disposition: inline; filename=t.c
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#include <string.h>
void foo (char *bar)
{
  strcpy (bar, "this is a very long string that's gonna be split");
}

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Run =E2=80=9Cgcc -c t.c=E2=80=9D with and without -fno-builtin-strcpy.

Ludo=E2=80=99.

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