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[PATCH] cc/gcc: Apply CT_CC_GCC_DISABLE_PCH to do_cc_core

# HG changeset patch
# User Zhenqiang Chen <zhenqiang.chen@linaro.org>
# Date 1321587170 -28800
# Node ID 034050d2fbe6af17d4e89b9d32ef2f68d8f7c041
# Parent  a6c68712024f406df7d2da4af377f51982615833
cc/gcc: Apply CT_CC_GCC_DISABLE_PCH to do_cc_core.

Otherwise, users have to input --disable-libstdcxx-pch option
when building bare-metal CANADIAN C++ compiler.

Reviewed-by: Michael Hope
Signed-off-by: Zhenqiang Chen <zhenqiang.chen@linaro.org>

diff --git a/scripts/build/cc/gcc.sh b/scripts/build/cc/gcc.sh
--- a/scripts/build/cc/gcc.sh
+++ b/scripts/build/cc/gcc.sh
@@ -289,6 +289,8 @@
     extra_config+=(--disable-libgomp)
     extra_config+=(--disable-libmudflap)

+    [ "${CT_CC_GCC_DISABLE_PCH}" = "y" ] && extra_config+=("--disable-libstdcxx-pch")
+
     CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"

# Use --with-local-prefix so older gccs don't look in /usr/local (http://gcc.gnu.org/PR10532)

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