diff --git a/rustc.spec b/rustc.spec
index 297b2eb..3a2dee0 100644
--- a/rustc.spec
+++ b/rustc.spec
@@ -1,6 +1,6 @@
 %define stage1 1
 Name:          rustc
-Version:       1.27.0
+Version:       1.47.0
 Release:       1mamba
 Summary:       The Rust programming language, designed to be a safe, concurrent, practical language
 Group:         Applications/Development
@@ -13,10 +13,10 @@ Patch0:        rustc-1.25.0-disable-llvm-ocaml-binding.patch
 License:       MIT
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
-BuildRequires: libcurl-devel
+BuildRequires: ldconfig
 BuildRequires: libgcc
+BuildRequires: libgit2-devel
 BuildRequires: libopenssl-devel
-BuildRequires: libssh2-devel
 BuildRequires: libstdc++6-devel
 BuildRequires: libz-devel
 ## AUTOBUILDREQ-END
@@ -49,14 +49,22 @@ This package contains the documentation for %{name}.
 %setup -q -n %{name}-%{version}-src
 #-D -T
 #:<< _EOF
-%patch0 -p0
+#%patch0 -p0
 
 cat <<EOF > config.toml
 # see config.toml.example for more possible options
 [llvm]
 ninja = true
+%ifarch arm
+ldflags = "-latomic"
+%endif
 
 [build]
+%ifarch arm
+build = "arm-unknown-linux-gnueabi"
+host = ["arm-unknown-linux-gnueabi"]
+target= ["arm-unknown-linux-gnueabi"]
+%endif
 %if "%{stage1}" != "1"
 cargo = "/usr/bin/cargo"
 rustc = "/usr/bin/rustc"
@@ -74,20 +82,22 @@ docdir = "share/doc/rust"
 # 0 or the new default of 16 is faster, but can result in worse performance
 # https://github.com/rust-lang/rust/issues/47745
 codegen-units = 1
-debuginfo = true
-debuginfo-lines = true
+#debuginfo = true
+#debuginfo-lines = true
 channel = "stable"
 rpath = false
 EOF
 
 %build
-:<< _EOF
+#:<< _EOF
 ./x.py build
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 DESTDIR=%{buildroot} ./x.py install
 
+chmod +x %{buildroot}%{_libdir}/lib*.so*
+
 cd %{buildroot}%{_libdir}
 #rm rustlib/{components,manifest-rustc,rust-installer-version}
 %ifarch %{ix86}
@@ -105,13 +115,20 @@ cd -
 %post -n lib%{name} -p /sbin/ldconfig
 %postun -n lib%{name} -p /sbin/ldconfig
 
-%files -f %{name}.lang
+%files
+#-f %{name}.lang
 %defattr(-,root,root)
 %{_sysconfdir}/bash_completion.d/cargo
 %{_bindir}/cargo
 %{_bindir}/cargo-fmt
+%{_bindir}/cargo-clippy
+%{_bindir}/cargo-miri
+%{_bindir}/clippy-driver
+%{_bindir}/miri
 %{_bindir}/rls
+%{_bindir}/rust-analyzer
 %{_bindir}/rust-gdb
+%{_bindir}/rust-gdbgui
 %{_bindir}/rust-lldb
 %{_bindir}/rustc
 %{_bindir}/rustdoc
@@ -124,16 +141,13 @@ cd -
 
 %files -n lib%{name}
 %defattr(-,root,root)
-%{_libdir}/libarena-*.so
-%{_libdir}/libfmt_macros-*.so
-%{_libdir}/libgraphviz-*.so
-%{_libdir}/libproc_macro-*.so
+%{_libdir}/libLLVM-11-rust-%{version}-stable.so*
+%{_libdir}/rustlib/src/rust/Cargo.lock
+%{_libdir}/libchalk_derive-*.so
 %{_libdir}/librustc*.so
-%{_libdir}/libserialize-*.so
 %{_libdir}/libstd-*.so
-%{_libdir}/libsyntax*.so
-%{_libdir}/libterm-*.so
 %{_libdir}/libtest-*.so
+%{_libdir}/libtracing_attributes-*.so
 %dir %{_libdir}/rustlib
 %{_libdir}/rustlib/components
 %{_libdir}/rustlib/rust-installer-version
@@ -143,8 +157,8 @@ cd -
 %{_libdir}/rustlib/manifest-*
 %dir %{_libdir}/rustlib/src
 %dir %{_libdir}/rustlib/src/rust
-%dir %{_libdir}/rustlib/src/rust/src
-%{_libdir}/rustlib/src/rust/src/*
+%dir %{_libdir}/rustlib/src/rust/library
+%{_libdir}/rustlib/src/rust/library/*
 %{_libdir}/rustlib/uninstall.sh
 %ifarch %{ix86}
 %dir %{_libdir}/rustlib/i686-unknown-linux-gnu
@@ -165,9 +179,15 @@ cd -
 %{_datadir}/doc/rust/html/.stamp
 %dir %{_datadir}/doc/rust/html
 %{_datadir}/doc/rust/html/*
-%doc README.md
+#%doc README.md
 
 %changelog
+* Tue Nov 10 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 1.47.0-1mamba
+- update to 1.47.0
+
+* Thu May 21 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 1.43.0-1mamba
+- update to 1.43.0
+
 * Thu Jul 05 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 1.27.0-1mamba
 - update to 1.27.0