--- gcc/config/rs6000/t-linux
+++ gcc/config/rs6000/t-linux
@@ -2,7 +2,8 @@
 # or soft-float.
 ifeq (,$(filter $(with_cpu),$(SOFT_FLOAT_CPUS))$(findstring soft,$(with_float)))
 ifneq (,$(findstring powerpc64,$(target)))
-MULTILIB_OSDIRNAMES := .=../lib64$(call if_multiarch,:powerpc64-linux-gnu)
+MULTILIB_OSDIRNAMES := m64=../lib
+MULTILIB_OSDIRNAMES += m32=../lib32
 else
 ifneq (,$(findstring spe,$(target)))
 MULTIARCH_DIRNAME := powerpc-linux-gnuspe$(if $(findstring 8548,$(with_cpu)),,v1)
@@ -14,7 +15,8 @@
 MULTIARCH_DIRNAME := $(subst -linux,le-linux,$(MULTIARCH_DIRNAME))
 endif
 ifneq (,$(findstring powerpc64le,$(target)))
-MULTILIB_OSDIRNAMES := $(subst -linux,le-linux,$(MULTILIB_OSDIRNAMES))
+MULTILIB_OSDIRNAMES := m64=../lib
+MULTILIB_OSDIRNAMES += m32=../lib32
 endif
 endif
 
--- gcc/config/rs6000/t-linux64
+++ gcc/config/rs6000/t-linux64
@@ -28,8 +28,8 @@
 MULTILIB_OPTIONS    := m64/m32
 MULTILIB_DIRNAMES   := 64 32
 MULTILIB_EXTRA_OPTS := 
-MULTILIB_OSDIRNAMES := m64=../lib64$(call if_multiarch,:powerpc64-linux-gnu)
-MULTILIB_OSDIRNAMES += m32=$(if $(wildcard $(shell echo $(SYSTEM_HEADER_DIR))/../../usr/lib32),../lib32,../lib)$(call if_multiarch,:powerpc-linux-gnu)
+MULTILIB_OSDIRNAMES := m64=../lib
+MULTILIB_OSDIRNAMES += m32=../lib32
 
 rs6000-linux.o: $(srcdir)/config/rs6000/rs6000-linux.c
 	$(COMPILE) $<
--- gcc/config/rs6000/t-linux64bele
+++ gcc/config/rs6000/t-linux64bele
@@ -2,6 +2,6 @@
 
 MULTILIB_OPTIONS    += mlittle
 MULTILIB_DIRNAMES   += le
-MULTILIB_OSDIRNAMES += $(subst =,.mlittle=,$(subst lible32,lib32le,$(subst lible64,lib64le,$(subst lib,lible,$(subst -linux,le-linux,$(MULTILIB_OSDIRNAMES))))))
-MULTILIB_OSDIRNAMES += $(subst $(if $(findstring 64,$(target)),m64,m32).,,$(filter $(if $(findstring 64,$(target)),m64,m32).mlittle%,$(MULTILIB_OSDIRNAMES)))
+MULTILIB_OSDIRNAMES = m64=../lib
+MULTILIB_OSDIRNAMES+= m32=../lib32
 MULTILIB_MATCHES    := ${MULTILIB_MATCHES_ENDIAN}
--- gcc/config/rs6000/t-linux64lebe
+++ gcc/config/rs6000/t-linux64lebe
@@ -2,6 +2,6 @@
 
 MULTILIB_OPTIONS    += mbig
 MULTILIB_DIRNAMES   += be
-MULTILIB_OSDIRNAMES += $(subst =,.mbig=,$(subst libbe32,lib32be,$(subst libbe64,lib64be,$(subst lib,libbe,$(subst le-linux,-linux,$(MULTILIB_OSDIRNAMES))))))
-MULTILIB_OSDIRNAMES += $(subst $(if $(findstring 64,$(target)),m64,m32).,,$(filter $(if $(findstring 64,$(target)),m64,m32).mbig%,$(MULTILIB_OSDIRNAMES)))
+MULTILIB_OSDIRNAMES := m64=../lib
+MULTILIB_OSDIRNAMES += m32=../lib32
 MULTILIB_MATCHES    := ${MULTILIB_MATCHES_ENDIAN}