[PATCH] Support extra host compiler flags

[Michael Hope]

# HG changeset patch
# User Michael Hope <michael.hope@linaro.org>
# Date 1317777591 -46800
# Node ID 415f1de11ddcc321d5e6cf2f7cd058973045507f
# Parent  f051032a1070eda28557dd738c35446b44787217
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>

diff -r f051032a1070 -r 415f1de11ddc config/global/build-behave.in
--- a/config/global/build-behave.in	Wed Oct 05 14:15:45 2011 +1300
+++ b/config/global/build-behave.in	Wed Oct 05 14:19:51 2011 +1300
@@ -41,6 +41,16 @@
       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 -r f051032a1070 -r 415f1de11ddc scripts/crosstool-NG.sh.in
--- a/scripts/crosstool-NG.sh.in	Wed Oct 05 14:15:45 2011 +1300
+++ b/scripts/crosstool-NG.sh.in	Wed Oct 05 14:19:51 2011 +1300
@@ -479,7 +479,7 @@
     esac
 
     # Help gcc
-    CT_CFLAGS_FOR_HOST=
+    CT_CFLAGS_FOR_HOST="${CT_EXTRA_FLAGS_FOR_HOST}"
     [ "${CT_USE_PIPES}" = "y" ] && CT_CFLAGS_FOR_HOST="${CT_CFLAGS_FOR_HOST} -pipe"
 
     # Override the configured jobs with what's been given on the command line

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