diff --git a/.xsimd.metadata b/.xsimd.metadata
new file mode 100644
index 0000000..02c506a
--- /dev/null
+++ b/.xsimd.metadata
@@ -0,0 +1 @@
+8675eb36e75fd342e8ffb00af4e195ae1aada3a9  SOURCES/xsimd-7.4.9.tar.gz
diff --git a/SOURCES/415.patch b/SOURCES/415.patch
new file mode 100644
index 0000000..8173ea7
--- /dev/null
+++ b/SOURCES/415.patch
@@ -0,0 +1,22 @@
+From 20bfc0d2b8f70995877e7606a9fd8f7c839ccc3b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Miro=20Hron=C4=8Dok?= <miro@hroncok.cz>
+Date: Thu, 18 Feb 2021 10:58:08 +0100
+Subject: [PATCH] Fix missing include for gcc-11
+
+Required for std::numeric_limits
+---
+ include/xsimd/types/xsimd_complex_base.hpp | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/include/xsimd/types/xsimd_complex_base.hpp b/include/xsimd/types/xsimd_complex_base.hpp
+index 80beda37..e3545047 100644
+--- a/include/xsimd/types/xsimd_complex_base.hpp
++++ b/include/xsimd/types/xsimd_complex_base.hpp
+@@ -13,6 +13,7 @@
+ 
+ #include <complex>
+ #include <cstddef>
++#include <limits>
+ #include <ostream>
+ 
+ #ifdef XSIMD_ENABLE_XTL_COMPLEX
diff --git a/SPECS/xsimd.spec b/SPECS/xsimd.spec
new file mode 100644
index 0000000..7f5c6d5
--- /dev/null
+++ b/SPECS/xsimd.spec
@@ -0,0 +1,107 @@
+Name:           xsimd
+Version:        7.4.9
+Release:        3%{?dist}
+Summary:        C++ wrappers for SIMD intrinsics
+License:        BSD
+URL:            https://xsimd.readthedocs.io/
+%global github  https://github.com/QuantStack/xsimd
+Source0:        %{github}/archive/%{version}/%{name}-%{version}.tar.gz
+
+# Fix missing include for gcc-11
+# https://bugzilla.redhat.com/show_bug.cgi?id=1923608
+Patch1:         %{github}/pull/415.patch
+
+BuildRequires:  cmake
+BuildRequires:  gcc-c++
+BuildRequires:  gtest-devel
+BuildRequires:  gmock-devel
+
+%ifarch %{arm}
+# Only used for testing, as it's a header-only package.
+%global optflags %(echo %{optflags} -mfpu=neon)
+%endif
+
+# there is no actual arched content - this is a header only library
+%global debug_package %{nil}
+
+# Get Fedora 33++ behavior on anything older
+%undefine __cmake_in_source_build
+
+%global _description \
+SIMD (Single Instruction, Multiple Data) is a feature of microprocessors that \
+has been available for many years. SIMD instructions perform a single operation \
+on a batch of values at once, and thus provide a way to significantly \
+accelerate code execution. However, these instructions differ between \
+microprocessor vendors and compilers. \
+ \
+xsimd provides a unified means for using these features for library authors. \
+Namely, it enables manipulation of batches of numbers with the same arithmetic \
+operators as for single values. It also provides accelerated implementation \
+of common mathematical functions operating on batches. \
+
+%description %_description
+
+%package devel
+Summary:        %{summary}
+Provides:       %{name} = %{version}-%{release}
+Provides:       %{name}-static = %{version}-%{release}
+%description devel %_description
+
+
+%prep
+%autosetup -p1
+
+%build
+%cmake -DBUILD_TESTS=ON
+%cmake_build
+
+%install
+%cmake_install
+
+%check
+# Explicitly not supported upstream for simd mode. Still valuable for scalar mode layer.
+%ifnarch ppc64le s390x
+%cmake_build -- xtest
+%endif
+
+%files devel
+%doc README.md
+%license LICENSE
+%{_includedir}/%{name}/
+%{_libdir}/cmake/%{name}/
+%{_libdir}/pkgconfig/%{name}.pc
+
+%changelog
+* Thu Jan 13 2022  Kaleb S. KEITHLEY <kkeithle [at] redhat.com> - 7.4.9-3
+- rebuild from lookaside
+
+* Thu Jan 28 2021 Fedora Release Engineering <releng@fedoraproject.org> - 7.4.9-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
+
+* Mon Oct 26 2020 sguelton@redhat.com - 7.4.9-1
+- Update to latest version
+
+* Sat Oct 17 2020 sguelton@redhat.com - 7.4.8-2
+- Fix missing #include for gcc-11
+
+* Sat Oct 3 2020 sguelton@redhat.com - 7.4.8-1
+- Update to latest version
+
+* Wed Jul 29 2020 Fedora Release Engineering <releng@fedoraproject.org> - 7.4.6-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild
+
+* Thu Jan 16 2020 sguelton@redhat.com - 7.4.6-1
+- Update to latest version
+
+* Sat Jul 27 2019 Fedora Release Engineering <releng@fedoraproject.org> - 7.2.3-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild
+
+* Thu Jul 04 2019 Miro Hrončok <mhroncok@redhat.com> - 7.2.3-3
+- Allow all architectures
+
+* Wed Jul 03 2019 Miro Hrončok <mhroncok@redhat.com> - 7.2.3-2
+- Apply upstream workaround for armv7
+- Reenable tests (commented out by mistake)
+
+* Fri Jun 28 2019 Miro Hrončok <mhroncok@redhat.com> - 7.2.3-1
+- Initial package