diff --git a/ldc.spec b/ldc.spec
index 0284799..8360871 100644
--- a/ldc.spec
+++ b/ldc.spec
@@ -1,6 +1,6 @@
-%define bootstrap 1
+%define bootstrap 0
 Name:          ldc
-Version:       1.29.0
+Version:       1.31.0
 Release:       2mamba
 Summary:       The LLVM-based D Compiler
 Group:         Applications/Development
@@ -11,12 +11,14 @@ URL:           https://wiki.dlang.org/LDC
 Source:        https://github.com/ldc-developers/ldc.git/v%{version}/ldc-%{version}.tar.bz2
 Source1:       https://github.com/ldc-developers/ldc/releases/download/v%{version}/ldc2-%{version}-linux-x86_64.tar.xz
 Source2:       https://github.com/ldc-developers/ldc/releases/download/v1.2.0/ldc2-1.2.0-linux-x86.tar.xz
+Source3:       https://github.com/ldc-developers/ldc/releases/download/v%{version}/ldc2-%{version}-linux-aarch64.tar.xz
 Patch0:        ldc-1.23.0-llvm-11.patch
 License:       BSD
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
 BuildRequires: libgcc
 BuildRequires: libllvm-devel
+BuildRequires: libspirv-llvm-translator-devel
 BuildRequires: libstdc++6-devel
 ## AUTOBUILDREQ-END
 BuildRequires: cmake
@@ -51,6 +53,9 @@ This package contains libraries and header files for developing applications tha
 %ifarch %{ix86}
 %setup -q -a2
 %endif
+%ifarch aarch64
+%setup -q -a3
+%endif
 %else
 %setup -q
 %endif
@@ -58,18 +63,30 @@ This package contains libraries and header files for developing applications tha
 
 %build
 %cmake -d build \
-   -DINCLUDE_INSTALL_DIR=%{_includedir}/d \
+   -DBUILD_SHARED_LIBS=BOTH \
+   -DBUILD_LTO_LIBS=ON \
    -DLDC_WITH_LLD=OFF \
-%if "0%{?bootstrap}"
+%ifarch x86_64 aarch64
+   -DD_COMPILER_FLAGS="-link-defaultlib-shared=false -linker=gold --flto=thin" \
+%else
+   -DD_COMPILER_FLAGS="-link-defaultlib-shared=false --flto=thin" \
+%endif
+   -DADDITIONAL_DEFAULT_LDC_SWITCHES="\"-link-defaultlib-shared\"" \
+   -DINCLUDE_INSTALL_DIR=%{_includedir}/d \
+%if "0%{?bootstrap}" != "0"
 %ifarch x86_64
    -DD_COMPILER=`pwd`/../ldc2-%{version}-linux-x86_64/bin/ldmd2
 %endif
-%ifarch %{ix86}
-   -DD_COMPILER=`pwd`/../ldc2-1.2.0-linux-x86/bin/ldmd2
+%ifarch aarch64
+   -DD_COMPILER=`pwd`/../ldc2-%{version}-linux-aarch64/bin/ldmd2
 %endif
 %endif
 
-%make
+#%ifarch %{ix86}
+#   -DD_COMPILER=`pwd`/../ldc2-1.2.0-linux-x86/bin/ldmd2
+#%endif
+
+%make -j1
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
@@ -117,13 +134,22 @@ This package contains libraries and header files for developing applications tha
 %{_libdir}/ldc_rt.dso.o
 %{_libdir}/libdruntime-ldc-debug-shared.so
 %{_libdir}/libdruntime-ldc-shared.so
-#%{_libdir}/libldc-jit-rt.a
-#%{_libdir}/libldc-jit.so
+%{_libdir}/libdruntime-ldc*.a
 %{_libdir}/libphobos2-ldc-debug-shared.so
 %{_libdir}/libphobos2-ldc-shared.so
+%{_libdir}/libphobos2-ldc*.a
 %doc README.md
 
 %changelog
+* Sun Mar 12 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 1.31.0-2mamba
+- rebuiult with more cmake flags as attempt to fix 'Error: unrecognized trait classInstanceAlignment'
+
+* Sun Feb 12 2023 Automatic Build System <autodist@mambasoft.it> 1.31.0-1mamba
+- automatic version update by autodist
+
+* Thu Jul 21 2022 Automatic Build System <autodist@mambasoft.it> 1.30.0-1mamba
+- automatic version update by autodist
+
 * Mon May 02 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 1.29.0-2mamba
 - rebuilt with llvm 14.0.3