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From 9673dcd70489c1c9df22aa0eb7a98afbccc0ced3 Mon Sep 17 00:00:00 2001
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From: Andreas Schneider <asn@samba.org>
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Date: Mon, 3 Sep 2018 10:35:08 +0200
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Subject: [PATCH 1/2] waf: Check for -fstack-protect-strong support
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The -fstack-protector* flags are compiler only flags, don't pass them to
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the linker.
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https://developers.redhat.com/blog/2018/03/21/compiler-and-linker-flags-gcc/
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BUG: https://bugzilla.samba.org/show_bug.cgi?id=13601
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Signed-off-by: Andreas Schneider <asn@samba.org>
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Reviewed-by: Andrew Bartlett <abartlet@samba.org>
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(cherry picked from commit 38e97f8b52e85bdfcf2d74a4fb3c848fa46ba371)
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---
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buildtools/wafsamba/samba_autoconf.py | 36 ++++++++++++++-------------
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1 file changed, 19 insertions(+), 17 deletions(-)
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diff --git a/buildtools/wafsamba/samba_autoconf.py b/buildtools/wafsamba/samba_autoconf.py
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index c4391d0c4dc..bfd6f9710db 100644
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--- a/buildtools/wafsamba/samba_autoconf.py
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+++ b/buildtools/wafsamba/samba_autoconf.py
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@@ -674,23 +674,25 @@ def SAMBA_CONFIG_H(conf, path=None):
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return
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# we need to build real code that can't be optimized away to test
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- if conf.check(fragment='''
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- #include <stdio.h>
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-
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- int main(void)
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- {
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- char t[100000];
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- while (fgets(t, sizeof(t), stdin));
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- return 0;
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- }
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- ''',
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- execute=0,
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- ccflags='-fstack-protector',
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- ldflags='-fstack-protector',
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- mandatory=False,
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- msg='Checking if toolchain accepts -fstack-protector'):
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- conf.ADD_CFLAGS('-fstack-protector')
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- conf.ADD_LDFLAGS('-fstack-protector')
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+ stack_protect_list = ['-fstack-protector-strong', '-fstack-protector']
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+ for stack_protect_flag in stack_protect_list:
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+ flag_supported = conf.check(fragment='''
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+ #include <stdio.h>
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+
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+ int main(void)
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+ {
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+ char t[100000];
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+ while (fgets(t, sizeof(t), stdin));
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+ return 0;
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+ }
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+ ''',
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+ execute=0,
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+ ccflags=[ '-Werror', '-Wp,-D_FORTIFY_SOURCE=2', stack_protect_flag],
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+ mandatory=False,
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+ msg='Checking if compiler accepts %s' % (stack_protect_flag))
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+ if flag_supported:
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+ conf.ADD_CFLAGS('-Wp,-D_FORTIFY_SOURCE=2 %s' % (stack_protect_flag))
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+ break
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if Options.options.debug:
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conf.ADD_CFLAGS('-g', testflags=True)
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--
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2.18.0
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From 5cfefc8d4c7fc4aba5b1dc2b7ea6f02c126d4070 Mon Sep 17 00:00:00 2001
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From: Andreas Schneider <asn@samba.org>
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Date: Mon, 3 Sep 2018 10:49:52 +0200
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Subject: [PATCH 2/2] waf: Add -fstack-clash-protection
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https://developers.redhat.com/blog/2018/03/21/compiler-and-linker-flags-gcc/
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BUG: https://bugzilla.samba.org/show_bug.cgi?id=13601
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Signed-off-by: Andreas Schneider <asn@samba.org>
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Reviewed-by: Andrew Bartlett <abartlet@samba.org>
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(cherry picked from commit fc4df251c88365142515a81bea1120b2b84cc4a0)
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---
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buildtools/wafsamba/samba_autoconf.py | 17 +++++++++++++++++
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1 file changed, 17 insertions(+)
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diff --git a/buildtools/wafsamba/samba_autoconf.py b/buildtools/wafsamba/samba_autoconf.py
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index bfd6f9710db..f2b3ec8db8d 100644
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--- a/buildtools/wafsamba/samba_autoconf.py
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+++ b/buildtools/wafsamba/samba_autoconf.py
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@@ -694,6 +694,23 @@ def SAMBA_CONFIG_H(conf, path=None):
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conf.ADD_CFLAGS('-Wp,-D_FORTIFY_SOURCE=2 %s' % (stack_protect_flag))
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break
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+ flag_supported = conf.check(fragment='''
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+ #include <stdio.h>
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+
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+ int main(void)
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+ {
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+ char t[100000];
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+ while (fgets(t, sizeof(t), stdin));
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+ return 0;
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+ }
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+ ''',
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+ execute=0,
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+ ccflags=[ '-Werror', '-fstack-clash-protection'],
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+ mandatory=False,
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+ msg='Checking if compiler accepts -fstack-clash-protection')
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+ if flag_supported:
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+ conf.ADD_CFLAGS('-fstack-clash-protection')
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+
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if Options.options.debug:
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conf.ADD_CFLAGS('-g', testflags=True)
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--
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2.18.0
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