diff --git a/baselibs.conf b/baselibs.conf
new file mode 100644
index 0000000..e4a7a4d
--- /dev/null
+++ b/baselibs.conf
@@ -0,0 +1 @@
+libxxhash0
diff --git a/xxhash.changes b/xxhash.changes
index 6ad13f8..d8ee869 100644
--- a/xxhash.changes
+++ b/xxhash.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Wed Aug 14 15:06:38 UTC 2024 - Jan Engelhardt <jengelh@inai.de>
+
+- Build hwcap_libs (x86-64-v3) for xxhash, apparently there is
+  something to gain.
+
 -------------------------------------------------------------------
 Sun May  5 19:35:03 UTC 2024 - Bruno Pitrus <brunopitrus@hotmail.com>
 
diff --git a/xxhash.spec b/xxhash.spec
index c133161..1b9ece8 100644
--- a/xxhash.spec
+++ b/xxhash.spec
@@ -24,9 +24,11 @@ License:        BSD-2-Clause AND GPL-2.0-only
 Group:          Productivity/Security
 URL:            https://github.com/Cyan4973/xxHash
 Source0:        https://github.com/Cyan4973/xxHash/archive/v%{version}.tar.gz#/xxHash-%{version}.tar.gz
-Patch0:         test-tools-do-not-override-cflags.patch
+Source9:        baselibs.conf
+Patch1:         test-tools-do-not-override-cflags.patch
 BuildRequires:  gcc-c++
-BuildRequires:  pkgconfig
+BuildRequires:  pkg-config
+%{?suse_build_hwcaps_libs}
 
 %description
 xxHash is a hash algorithm. It completes the SMHasher test suite which
@@ -34,38 +36,37 @@ evaluates collision, dispersion and randomness qualities of hash functions.
 Hashes are identical on all platforms.
 
 %package -n libxxhash0
-Summary:        Shared library for xxHash - a non-cryptographic hash algorithm
+Summary:        Non-cryptographic hash algorithm
 License:        BSD-2-Clause
 Group:          System/Libraries
 
 %description -n libxxhash0
-Shared library for xxHash - a hash algorithm. It completes the SMHasher test
-suite which evaluates collision, dispersion and randomness qualities of hash
-functions. Hashes are identical on all platforms.
+xxHash is a hash algorithm. It completes the SMHasher test suite which
+evaluates collision, dispersion and randomness qualities of hash functions.
+Hashes are identical on all platforms.
 
 %package devel
-Summary:        Development files for xxHash - a non-cryptographic hash algorithm
+Summary:        Headers for xxHash, a non-cryptographic hash algorithm
 License:        BSD-2-Clause
 Group:          Development/Libraries/C and C++
 Requires:       %{name} = %{version}
 Requires:       libxxhash0 = %{version}
 
 %description devel
-Development files for xxHash - a hash algorithm. It completes the SMHasher test
-suite which evaluates collision, dispersion and randomness qualities of hash
-functions. Hashes are identical on all platforms.
+Headers and other development files for xxHash.
 
 %prep
 %autosetup -p1 -n xxHash-%{version}
 
 %build
-export CFLAGS="%{optflags}"
-export CXXFLAGS="%{optflags}"
+# ALLOW_AVX just means "we guarantee we policed our %%optflags".
+export CFLAGS="%{optflags} -DXXH_X86DISPATCH_ALLOW_AVX=1"
+export CXXFLAGS="$CFLAGS"
 export LDFLAGS="%{?build_ldflags}"
 %make_build prefix=%{_prefix} libdir=%{_libdir}
 
 %install
-export CFLAGS="%{optflags}"
+export CFLAGS="%{optflags} -DXXH_X86DISPATCH_ALLOW_AVX=1"
 export CXXFLAGS="%{optflags}"
 export LDFLAGS="%{?build_ldflags}"
 %make_install prefix=%{_prefix} libdir=%{_libdir}