--- fftw3.spec~	2021-06-08 10:50:19.000000000 +0300
+++ fftw3.spec	2023-11-13 16:28:01.187929262 +0300
@@ -214,18 +214,20 @@ options_double='%{subst_enable sse2} %{s
 
 for m in single double long-double %{?_enable_quad:quad-precision}; do
 	d=${m%%-*}
-	mkdir $d
+	mkdir -p $d
 	pushd $d
 	eval extraoptions="\"\$options_$d\""
 	%configure $options $extraoptions --enable-$m
 	%make_build
 	popd
 done
+%cmake
 
 %install
 for d in single double long %{?_enable_quad:quad}; do
 	%makeinstall_std -C $d
 done
+install -m 0644 %_cmake__builddir/FFTW3LibraryDepends.cmake %buildroot/%_libdir/cmake/fftw3/
 
 # remove non-packaged files
 rm %buildroot%_libdir/*.la