--- boot0-9.1_rc3.ebuild.orig	2012-11-06 21:52:54.000000000 +0900
+++ boot0-9.1_rc3.ebuild	2012-11-26 20:27:24.000000000 +0900
@@ -4,7 +4,7 @@
 
 EAPI=2
 
-inherit bsdmk freebsd flag-o-matic
+inherit bsdmk freebsd flag-o-matic toolchain-funcs
 
 DESCRIPTION="FreeBSD's bootloader"
 SLOT="0"
@@ -34,11 +34,20 @@
 }
 
 src_prepare() {
-	sed -e '/-fomit-frame-pointer/d' -e '/-mno-align-long-strings/d' \
+	sed -e '/-mno-align-long-strings/d' \
 		-i "${S}"/i386/boot2/Makefile \
 		-i "${S}"/i386/gptboot/Makefile \
 		-i "${S}"/i386/gptzfsboot/Makefile \
 		-i "${S}"/i386/zfsboot/Makefile || die
+
+	# gcc-4.6 or later version support, bug #409815
+	if ( [[ $(gcc-major-version) -eq 4 && $(gcc-minor-version) -ge 6 ]] ) ; then
+		sed -i -e '/-m elf_i386_fbsd/d' "${S}"/i386/Makefile.inc || die
+		for dir in boot2 gptboot gptzfsboot zfsboot; do
+			echo "LDFLAGS+= -m elf_i386_fbsd" >> "${S}"/i386/${dir}/Makefile || die
+		done
+		echo "CFLAGS+= -fno-asynchronous-unwind-tables" >> "${S}"/i386/boot2/Makefile || die
+	fi
 }
 
 src_compile() {