From 04da3418caa214af2c486e6a731cd70489ef8f14 Mon Sep 17 00:00:00 2001
From: "Yann E. MORIN\"" <yann.morin.1998@anciens.enib.fr>
Date: Wed, 5 Oct 2011 14:19:51 +1300
Subject: scripts: support extra host compiler flags

Allow the user to configure extra flags to pass to the host compiler
at build time.  Applies to both C and C++.

Useful on Ubuntu to turn off the stack protector and fortify defaults
so the program stands a better chance of running on other distros.

Signed-off-by: Michael Hope <michael.hope@linaro.org>
[yann.morin.1998@anciens.enib.fr: put the custom flags at the end]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

diff --git a/config/global/build-behave.in b/config/global/build-behave.in
index 7092a7f..fae9917 100644
--- a/config/global/build-behave.in
+++ b/config/global/build-behave.in
@@ -41,6 +41,16 @@ config USE_PIPES
       Use gcc's option -pipe to use pipes rather than temp files when building
       the toolchain.
 
+config EXTRA_FLAGS_FOR_HOST
+    string
+    prompt "Extra host compiler flags"
+    default ""
+    help
+      Extra flags to pass to the host C and C++ compiler.
+
+      May be used to change the default features of the host
+      compiler such as turning off the stack protector or fortify.
+
 choice
     bool
     prompt "Shell to use as CONFIG_SHELL"
diff --git a/scripts/crosstool-NG.sh.in b/scripts/crosstool-NG.sh.in
index 6b6aa0e..4499f71 100644
--- a/scripts/crosstool-NG.sh.in
+++ b/scripts/crosstool-NG.sh.in
@@ -476,7 +476,8 @@ if [ -z "${CT_RESTART}" ]; then
 
     # Help gcc
     CT_CFLAGS_FOR_HOST=
-    [ "${CT_USE_PIPES}" = "y" ] && CT_CFLAGS_FOR_HOST="${CT_CFLAGS_FOR_HOST} -pipe"
+    [ "${CT_USE_PIPES}" = "y" ] && CT_CFLAGS_FOR_HOST+=" -pipe"
+    CT_CFLAGS_FOR_HOST+="${CT_EXTRA_FLAGS_FOR_HOST}"
 
     # Override the configured jobs with what's been given on the command line
     [ -n "${CT_JOBS}" ] && CT_PARALLEL_JOBS="${CT_JOBS}"
-- 
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