Index: gcc/config.gcc
===================================================================
--- gcc/config.gcc	(revision 201658)
+++ gcc/config.gcc	(working copy)
@@ -991,7 +991,7 @@
	;;
 avr-*-rtems*)
	tm_file="elfos.h avr/elf.h avr/avr-arch.h avr/avr.h dbxelf.h avr/rtems.h rtems.h newlib-stdint.h"
-	tmake_file="avr/t-avr avr/t-multilib t-rtems avr/t-rtems"
+	tmake_file="${tmake_file} avr/t-avr avr/t-multilib t-rtems avr/t-rtems"
	extra_gcc_objs="driver-avr.o avr-devices.o"
	extra_objs="avr-devices.o avr-log.o"
	;;
@@ -1001,7 +1001,7 @@
	    tm_file="${tm_file} ${cpu_type}/avrlibc.h"
	    tm_defines="${tm_defines} WITH_AVRLIBC"
	fi
-	tmake_file="avr/t-avr avr/t-multilib"
+	tmake_file="${tmake_file} avr/t-avr avr/t-multilib"
	use_gcc_stdint=wrap
	extra_gcc_objs="driver-avr.o avr-devices.o"
	extra_objs="avr-devices.o avr-log.o"
@@ -1053,7 +1053,7 @@
 crisv32-*-linux* | cris-*-linux*)
	tm_file="dbxelf.h elfos.h ${tm_file} gnu-user.h linux.h glibc-stdint.h cris/linux.h"
	# We need to avoid using t-linux, so override default tmake_file
-	tmake_file="cris/t-cris cris/t-linux t-slibgcc"
+	tmake_file="${tmake_file} cris/t-cris cris/t-linux t-slibgcc"
	extra_options="${extra_options} cris/linux.opt"
	case $target in
	  cris-*-*)
@@ -1705,8 +1705,7 @@
	;;
 m32r-*-linux*)
	tm_file="dbxelf.h elfos.h gnu-user.h linux.h glibc-stdint.h ${tm_file} m32r/linux.h"
-	# We override the tmake_file for linux -- why?
-	tmake_file="m32r/t-linux t-slibgcc"
+	tmake_file="${tmake_file} m32r/t-linux t-slibgcc"
	gnu_ld=yes
	if test x$enable_threads = xyes; then
		thread_file='posix'
@@ -1714,8 +1713,7 @@
	;;
 m32rle-*-linux*)
	tm_file="dbxelf.h elfos.h gnu-user.h linux.h glibc-stdint.h m32r/little.h ${tm_file} m32r/linux.h"
-	# We override the tmake_file for linux -- why?
-	tmake_file="m32r/t-linux t-slibgcc"
+	tmake_file="${tmake_file} m32r/t-linux t-slibgcc"
	gnu_ld=yes
	if test x$enable_threads = xyes; then
		thread_file='posix'
@@ -1778,7 +1776,7 @@
	tm_file="${tm_file} dbxelf.h elfos.h gnu-user.h linux.h glibc-stdint.h flat.h m68k/linux.h m68k/uclinux.h ./sysroot-suffix.h"
	extra_options="${extra_options} m68k/uclinux.opt"
	tm_defines="${tm_defines} MOTOROLA=1"
-	tmake_file="m68k/t-floatlib m68k/t-uclinux m68k/t-mlibs"
+	tmake_file="${tmake_file} m68k/t-floatlib m68k/t-uclinux m68k/t-mlibs"
	;;
 m68k-*-linux*)			# Motorola m68k's running GNU/Linux
				# with ELF format using glibc 2