diff --git a/SPECS/gcc.spec b/SPECS/gcc.spec
index 762ad917..70dd6e7d 100644
--- a/SPECS/gcc.spec
+++ b/SPECS/gcc.spec
@@ -5,7 +5,7 @@
 %global gcc_release 28
 %global _unpackaged_files_terminate_build 0
 %global _performance_build 1
-%global multilib_64_archs sparc64 s390x x86_64
+%global multilib_64_archs sparc64 s390x
 %ifarch %{ix86} x86_64 ia64 ppc ppc64 ppc64le ppc64p7 alpha aarch64
 %global build_ada 0
 %else
@@ -46,8 +46,8 @@
 %else
 %global build_libitm 0
 %endif
-%global build_cloog 1
-%global build_libstdcxx_docs 1
+%global build_cloog 0
+%global build_libstdcxx_docs 0
 %ifarch %{ix86} x86_64 ppc ppc64 ppc64le ppc64p7 s390 s390x %{arm} aarch64
 %global attr_ifunc 1
 %else
@@ -68,9 +68,9 @@
 %ifarch ppc
 %global multilib_32_arch ppc
 %endif
-%ifarch x86_64
-%global multilib_32_arch i686
-%endif
+#%ifarch x86_64
+#%global multilib_32_arch i686
+#%endif
 Summary: Various compilers (C, C++, Objective-C, Java, ...)
 Name: gcc
 %global gcc_version 4.8.5
@@ -315,8 +315,8 @@ Patch1406: gcc48-rh1535655-6.patch
 %global gcc_target_platform ppc64-%{_vendor}-%{_target_os}
 %endif
 %ifnarch sparcv9 ppc ppc64p7
-#%global gcc_target_platform %{_target_platform}
-%global gcc_target_platform ppc64-powerel-%{_target_os}
+%global gcc_target_platform %{_target_platform}
+#%global gcc_target_platform x86_64-powerel-%{_target_os}
 %endif
 
 %description
@@ -1394,6 +1394,9 @@ CC="$CC" CFLAGS="$OPT_FLAGS" \
 %ifarch %{ix86} x86_64
 	--with-tune=generic \
 %endif
+%ifarch x86_64
+	--disable-multilib \
+%endif
 %if 0%{?rhel} >= 7
 %ifarch %{ix86}
 	--with-arch=x86-64 \
@@ -2533,7 +2536,7 @@ fi
 %{_prefix}/lib/gcc/%{gcc_target_platform}/%{gcc_version}/include/fxsrintrin.h
 %{_prefix}/lib/gcc/%{gcc_target_platform}/%{gcc_version}/include/xsaveintrin.h
 %{_prefix}/lib/gcc/%{gcc_target_platform}/%{gcc_version}/include/xsaveoptintrin.h
-%{_prefix}/lib/gcc/%{gcc_target_platform}/%{gcc_version}/include/pkuintrin.h
+#%{_prefix}/lib/gcc/%{gcc_target_platform}/%{gcc_version}/include/pkuintrin.h
 %{_prefix}/lib/gcc/%{gcc_target_platform}/%{gcc_version}/include/mm_malloc.h
 %{_prefix}/lib/gcc/%{gcc_target_platform}/%{gcc_version}/include/mm3dnow.h
 %{_prefix}/lib/gcc/%{gcc_target_platform}/%{gcc_version}/include/cpuid.h