1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
Source: http://permalink.gmane.org/gmane.comp.gnu.libtool.bugs/7341
Bug confirmed. When code is compiled with -fstack-protector{,-all},
GCC "emits extra code to check for buffer overflows, such as stack
smashing attacks". This extra code uses symbols from libssp, and
therefore (at least) Cygwin's GCC specs contain:
*link_ssp:
%{fstack-protector|fstack-protector-all:-lssp_nonshared -lssp}
Therefore, when libtool fails to pass -fstack-protector{,-all} at link
stage, the link fails.
Patch attached. (Yes, I have a copyright assignment on file.)
Yaakov
Cygwin/X
From b79f4e117b6f73cc461a2e232063e08481d33300 Mon Sep 17 00:00:00 2001
From: Yaakov Selkowitz <yselkowitz <at> users.sourceforge.net>
Date: Tue, 1 Jun 2010 22:18:51 -0500
Subject: [PATCH] Fix linking with -fstack-protector
* libltdl/config/ltmain.m4sh (func_mode_link): Pass -fstack-protector*
to the linker as it is required at link time to resolve libssp symbols.
Signed-off-by: Yaakov Selkowitz <yselkowitz <at> users.sourceforge.net>
---
libltdl/config/ltmain.m4sh | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Upstream-Status: Pending
Index: libtool-2.4.2/libltdl/config/ltmain.m4sh
===================================================================
--- libtool-2.4.2.orig/libltdl/config/ltmain.m4sh 2012-06-01 12:35:44.089638130 -0700
+++ libtool-2.4.2/libltdl/config/ltmain.m4sh 2012-06-01 12:37:25.789643055 -0700
@@ -5067,13 +5067,14 @@
# -m*, -t[45]*, -txscale* architecture-specific flags for GCC
# -F/path path to uninstalled frameworks, gcc on darwin
# -p, -pg, --coverage, -fprofile-* profiling flags for GCC
+ # -fstack-protector* stack protector flags for GCC
# @file GCC response files
# -tp=* Portland pgcc target processor selection
# --sysroot=* for sysroot support
# -O*, -flto*, -fwhopr*, -fuse-linker-plugin GCC link-time optimization
-64|-mips[0-9]|-r[0-9][0-9]*|-xarch=*|-xtarget=*|+DA*|+DD*|-q*|-m*| \
-t[45]*|-txscale*|-p|-pg|--coverage|-fprofile-*|-F*|@*|-tp=*|--sysroot=*| \
- -O*|-flto*|-fwhopr*|-fuse-linker-plugin)
+ -O*|-flto*|-fwhopr*|-fuse-linker-plugin|-fstack-protector*)
func_quote_for_eval "$arg"
arg="$func_quote_for_eval_result"
func_append compile_command " $arg"
|
