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f6a4d74d8b
linker should add -lssp to linker cmdline when -fstack-protector therefore add this knowledge to libtool otherwise packages will fail to link (From OE-Core rev: d1756ff379ab310bfa6323d8643b7e9d764f94bf) Signed-off-by: Khem Raj <raj.khem@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
54 lines
2.3 KiB
Diff
54 lines
2.3 KiB
Diff
Source: http://permalink.gmane.org/gmane.comp.gnu.libtool.bugs/7341
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Bug confirmed. When code is compiled with -fstack-protector{,-all},
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GCC "emits extra code to check for buffer overflows, such as stack
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smashing attacks". This extra code uses symbols from libssp, and
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therefore (at least) Cygwin's GCC specs contain:
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*link_ssp:
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%{fstack-protector|fstack-protector-all:-lssp_nonshared -lssp}
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Therefore, when libtool fails to pass -fstack-protector{,-all} at link
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stage, the link fails.
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Patch attached. (Yes, I have a copyright assignment on file.)
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Yaakov
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Cygwin/X
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From b79f4e117b6f73cc461a2e232063e08481d33300 Mon Sep 17 00:00:00 2001
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From: Yaakov Selkowitz <yselkowitz <at> users.sourceforge.net>
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Date: Tue, 1 Jun 2010 22:18:51 -0500
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Subject: [PATCH] Fix linking with -fstack-protector
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* libltdl/config/ltmain.m4sh (func_mode_link): Pass -fstack-protector*
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to the linker as it is required at link time to resolve libssp symbols.
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Signed-off-by: Yaakov Selkowitz <yselkowitz <at> users.sourceforge.net>
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---
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libltdl/config/ltmain.m4sh | 4 +++-
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1 files changed, 3 insertions(+), 1 deletions(-)
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Signed-off-by: Khem Raj <raj.khem@gmail.com>
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Upstream-Status: Pending
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Index: libtool-2.4.2/libltdl/config/ltmain.m4sh
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===================================================================
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--- libtool-2.4.2.orig/libltdl/config/ltmain.m4sh 2012-06-01 12:35:44.089638130 -0700
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+++ libtool-2.4.2/libltdl/config/ltmain.m4sh 2012-06-01 12:37:25.789643055 -0700
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@@ -5067,13 +5067,14 @@
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# -m*, -t[45]*, -txscale* architecture-specific flags for GCC
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# -F/path path to uninstalled frameworks, gcc on darwin
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# -p, -pg, --coverage, -fprofile-* profiling flags for GCC
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+ # -fstack-protector* stack protector flags for GCC
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# @file GCC response files
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# -tp=* Portland pgcc target processor selection
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# --sysroot=* for sysroot support
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# -O*, -flto*, -fwhopr*, -fuse-linker-plugin GCC link-time optimization
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-64|-mips[0-9]|-r[0-9][0-9]*|-xarch=*|-xtarget=*|+DA*|+DD*|-q*|-m*| \
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-t[45]*|-txscale*|-p|-pg|--coverage|-fprofile-*|-F*|@*|-tp=*|--sysroot=*| \
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- -O*|-flto*|-fwhopr*|-fuse-linker-plugin)
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+ -O*|-flto*|-fwhopr*|-fuse-linker-plugin|-fstack-protector*)
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func_quote_for_eval "$arg"
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arg="$func_quote_for_eval_result"
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func_append compile_command " $arg"
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