gcc: fully installable in chroot this time, for real.

srcpkgs/gcc/template

@@ -53,27 +53,23 @@ if [ -n "$BOOTSTRAP_PKG_REBUILD" ]; then
 	Add_dependency build sed
 	Add_dependency build texinfo
 	Add_dependency build gettext
+	Add_dependency build flex
 fi
 
 do_build()
 {
-	local BPATH
-
 	if [ -n "$BOOTSTRAP_PKG_REBUILD" ]; then
-		BPATH="/usr/local/sbin:/bin:/usr/bin:/sbin:/usr/sbin"
-		BPATH="$BPATH:/usr/local/bin:/tools/bin"
-	else
-		BPATH=$PATH
+		unset LD_LIBRARY_PATH LDLIBPATH LDFLAGS CPPFLAGS
+		local SAVEDPATH=$PATH
+		export PATH="/bin:/usr/bin:/sbin:/usr/sbin:/tools/bin"
 	fi
 
 	# As specified in the LFS book, disable installing libiberty.
 	sed -i 's/install_to_$(INSTALL_DEST) //' libiberty/Makefile.in
-	# "Add" ppl-0.11 compatibility
-	sed -i "/ppl_minor_version=/s#10#11#" configure
 	# Do not run fixincludes
 	sed -i 's@\./fixinc\.sh@-c true@' gcc/Makefile.in
 
-	PATH=$BPATH ./configure --prefix=/usr \
+	./configure ${CONFIGURE_SHARED_ARGS} \
 		--enable-clocale=gnu --disable-bootstrap \
 		--enable-threads=posix --enable-__cxa_atexit --disable-multilib \
 		--enable-languages=c,c++,objc,obj-c++,fortran,go,lto --enable-tls \
@@ -85,6 +81,7 @@ do_build()
 		--enable-checking=release
 
 	make ${makejobs}
+	[ -n "$BOOTSTRAP_PKG_REBUILD" ] && export PATH=$SAVEDPATH
 }
 
 do_install()