From 1c7e195c94764d680a12a49b870f04cd58860f81 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Sat, 10 Jun 2017 07:51:58 -0700
Subject: gcc: Introduce a knob to configure gcc to default to PIE
GCCPIE flag which is empty by default adds "--enable-default-pie"
configure option for harderned distros
We do not require to add -fpie -pie flag externally anymore
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
meta/conf/distro/include/security_flags.inc | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
(limited to 'meta/conf')
diff --git a/meta/conf/distro/include/security_flags.inc b/meta/conf/distro/include/security_flags.inc
index 38164d08b8..f2eb224a77 100644
--- a/meta/conf/distro/include/security_flags.inc
+++ b/meta/conf/distro/include/security_flags.inc
@@ -5,6 +5,8 @@
# From a Yocto Project perspective, this file is included and tested
# in the DISTRO="poky-lsb" configuration.
+GCCPIE ?= "--enable-default-pie"
+
# _FORTIFY_SOURCE requires -O1 or higher, so disable in debug builds as they use
# -O0 which then results in a compiler warning.
lcl_maybe_fortify = "${@base_conditional('DEBUG_BUILD','1','','-D_FORTIFY_SOURCE=2',d)}"
@@ -12,7 +14,7 @@ lcl_maybe_fortify = "${@base_conditional('DEBUG_BUILD','1','','-D_FORTIFY_SOURCE
# Error on use of format strings that represent possible security problems
SECURITY_STRINGFORMAT ?= "-Wformat -Wformat-security -Werror=format-security"
-SECURITY_CFLAGS ?= "-fstack-protector-strong -pie -fpie ${lcl_maybe_fortify} ${SECURITY_STRINGFORMAT}"
+SECURITY_CFLAGS ?= "-fstack-protector-strong ${lcl_maybe_fortify} ${SECURITY_STRINGFORMAT}"
SECURITY_NO_PIE_CFLAGS ?= "-fstack-protector-strong ${lcl_maybe_fortify} ${SECURITY_STRINGFORMAT}"
SECURITY_LDFLAGS ?= "-fstack-protector-strong -Wl,-z,relro,-z,now"
--
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