diff --git a/.gitignore b/.gitignore
index 77bd07b..1dbb136 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,5 @@
 /libcxxabi-8.0.0.src.tar.xz
 /libcxxabi-9.0.0.src.tar.xz
 /libcxxabi-9.0.1.src.tar.xz
+/libcxxabi-10.0.0rc1.src.tar.xz
+/libcxxabi-10.0.0rc1.src.tar.xz.sig
diff --git a/hans-gpg-key.asc b/hans-gpg-key.asc
new file mode 100644
index 0000000..4b3cdde
--- /dev/null
+++ b/hans-gpg-key.asc
@@ -0,0 +1,52 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+
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+=ADVe
+-----END PGP PUBLIC KEY BLOCK-----
diff --git a/libcxxabi.spec b/libcxxabi.spec
index 4d5faad..197558e 100644
--- a/libcxxabi.spec
+++ b/libcxxabi.spec
@@ -1,15 +1,18 @@
-#%%global rc_ver 4
-%global baserelease 2
+%global rc_ver 1
+%global baserelease 0.1
 %global libcxxabi_srcdir libcxxabi-%{version}%{?rc_ver:rc%{rc_ver}}.src
 
 
 Name:		libcxxabi
-Version:	9.0.1
+Version:	10.0.0
 Release:	%{baserelease}%{?rc_ver:.rc%{rc_ver}}%{?dist}
 Summary:	Low level support for a standard C++ library
 License:	MIT or NCSA
 URL:		http://libcxxabi.llvm.org/
 Source0:	http://%{?rc_ver:pre}releases.llvm.org/%{version}/%{?rc_ver:rc%{rc_ver}}/%{libcxxabi_srcdir}.tar.xz
+Source3:	https://%{?rc_ver:pre}releases.llvm.org/%{version}/%{?rc_ver:rc%{rc_ver}}/%{libcxxabi_srcdir}.tar.xz.sig
+Source4:	https://prereleases.llvm.org/%{version}/hans-gpg-key.asc
+
 BuildRequires:	clang llvm-devel cmake llvm-static
 BuildRequires:	libcxx-devel >= %{version}
 %if 0%{?rhel}
@@ -93,6 +96,9 @@ cp -a include/* %{buildroot}%{_includedir}
 %{_libdir}/libc++abi.a
 
 %changelog
+* Fri Jan 31 2020 sguelton@redhat.com - 10.0.0-0.1.rc1
+- 10.0.0 rc1
+
 * Wed Jan 29 2020 Fedora Release Engineering <releng@fedoraproject.org> - 9.0.1-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild
 
diff --git a/sources b/sources
index 205f7f9..7829c9c 100644
--- a/sources
+++ b/sources
@@ -1 +1,2 @@
-SHA512 (libcxxabi-9.0.1.src.tar.xz) = b5dbe4379a13046e7b9003e6913b0435271476feef0acbfd4e8207fca6d4a580182628866bd2032ce84a55d524fee8620841f17214bc79c8f46a3fde2f57627a
+SHA512 (libcxxabi-10.0.0rc1.src.tar.xz) = 23dce9ff5019f350c0950adc86518e453670ab4e2695fc29f9247c60c1bb301ccd6ae38ea9721d67ed736e64a135ecef95ab6617a02853da790dc0b8c105ac7c
+SHA512 (libcxxabi-10.0.0rc1.src.tar.xz.sig) = 2e0e66944443f067bea4e130aee51c20fa64b176393091c71024fcc97a27043e34af08b34c046861f026c443178502905b246a751e56efc03fe7a84e4d3aa0cc