!6 fix cmake build error

From: @tanyulong2021 
Reviewed-by: @small_leek, @yangzhao_kl, @sinever 
Signed-off-by: @small_leek, @yangzhao_kl, @sinever

eigen3.spec

@@ -2,7 +2,7 @@
 
 Name:           eigen3
 Version:        3.3.8
-Release:        2
+Release:        3
 Summary:        A lightweight C++ template library for vector and matrix math
 
 License:        MPLv2.0 and LGPLv2+ and BSD
@@ -33,17 +33,26 @@ Provides:       %{name}-static = %{version}-%{release}
 %autosetup -p1 -n eigen-%{version}
 
 %build
+mkdir build_dir
+pushd build_dir
+%cmake ../ -DINCLUDE_INSTALL_DIR=include/%{name}
+popd
 
 %install
-install -d -p -m 0755 %{buildroot}%{_includedir}/%{name}
-cp -r Eigen unsupported %{buildroot}%{_includedir}/%{name}/
+mkdir -p %{buildroot}%{_includedir}/%{name}/
+cp -r unsupported %{buildroot}%{_includedir}/%{name}/
+cp -r Eigen  %{buildroot}%{_includedir}/%{name}/
+%make_install -C build_dir
 
 %files devel
 %license COPYING.README COPYING.BSD COPYING.MPL2 COPYING.LGPL
 %defattr(0644, root, root, 0755)
 %{_includedir}/%{name}
-
+%{_datadir}
 %changelog
+* Fri Mar 18 2022 tanyulong <tanyulong@kylinos.cn> - 3.3.8-3
+- fix cmake build error 
+
 * Sat Mar 27 2021 herengui <herengui@uniontech.com> - 3.3.8-2
 - fix empty include directory issue