Build a statically linked version of kmod

By providing a statically linked kmod, containers can mount it
and load kernel modules without compatibility issues

packages/kmod/kmod.spec

@@ -27,6 +27,27 @@ cp COPYING COPYING.LGPL
 cp tools/COPYING COPYING.GPL
 
 %build
+
+mkdir static-build
+pushd static-build
+
+%define _configure ../configure
+export LDFLAGS="-static -lz -lzstd"
+export CFLAGS="%{_cross_cflags} -static"
+
+%cross_configure \
+  --with-zlib \
+  --with-zstd \
+  --without-openssl
+
+%make_build LDFLAGS="-all-static"
+
+popd
+
+%define _configure ./configure
+export LDFLAGS="%{_cross_ldflags}"
+export CFLAGS="%{_cross_cflags}"
+
 %cross_configure \
   --with-zlib \
   --with-zstd \
@@ -44,6 +65,11 @@ done
 install -d %{buildroot}%{_cross_sbindir}
 ln -s ../bin/kmod %{buildroot}%{_cross_sbindir}/modprobe
 
+pushd static-build
+install -d %{buildroot}%{_cross_libexecdir}
+cp tools/kmod %{buildroot}%{_cross_libexecdir}/kmod
+popd
+
 %files
 %license COPYING.LGPL COPYING.GPL
 %{_cross_attribution_file}
@@ -56,6 +82,7 @@ ln -s ../bin/kmod %{buildroot}%{_cross_sbindir}/modprobe
 %{_cross_bindir}/rmmod
 %{_cross_sbindir}/modprobe
 %{_cross_libdir}/*.so.*
+%{_cross_libexecdir}/kmod
 %exclude %{_cross_datadir}/bash-completion
 %exclude %{_cross_mandir}