From e5ded6e946074aeda1a82b4d01c5cc16954a2f64 Mon Sep 17 00:00:00 2001
From: "Yann E. MORIN\"" <yann.morin.1998@anciens.enib.fr>
Date: Wed, 29 Dec 2010 17:58:35 +0100
Subject: cc/gcc: build lto-plugin if binutils' gold is built

To properly enable LTO with gold, gcc has to install a plugin that gold
uses to handle the LTO information.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

diff --git a/scripts/build/cc/gcc.sh b/scripts/build/cc/gcc.sh
index 405186c..152335e 100644
--- a/scripts/build/cc/gcc.sh
+++ b/scripts/build/cc/gcc.sh
@@ -481,6 +481,16 @@ do_cc() {
         "") extra_config+=("--without-long-double-128");;
     esac
 
+    # If LTO is selected and binutils has gold, then enable
+    # building the lto plugin with the --enable-gold option,
+    # but only if gold has support for plugins.
+    if [    "${CT_BINUTILS_GOLD_INSTALLED}" = "y"   \
+         -a "${CT_BINUTILS_GOLD_PLUGINS}" = "y"     \
+         -a "${CT_CC_GCC_USE_LTO}" = "y"            \
+       ]; then
+        extra_config+=( --enable-gold )
+    fi
+
     CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
 
     # --enable-symvers=gnu really only needed for sh4 to work around a
-- 
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