!9 [sync] PR-7: Fix syntax error when macro is not defined

From: @openeuler-sync-bot
Reviewed-by: @wang_yue111,@small_leek
Signed-off-by: @small_leek

qt5-qtserialport.spec

@@ -1,13 +1,13 @@
 Name:           qt5-qtserialport
 Version:        5.11.1
-Release:        5
+Release:        6
 Summary:        Serialport component of qt5
 License:        LGPLv2 with exceptions or LGPLv3 with exceptions
 URL:            http://www.qt.io
 Source0:        https://download.qt.io/new_archive/qt/5.11/5.11.1/submodules/qtserialport-everywhere-src-5.11.1.tar.xz
 
 BuildRequires:  qt5-qtbase-devel >= %{version} pkgconfig(libudev)
-Requires:       %{_qt5} = %{_qt5_version}
+%{?_qt5:Requires: %{_qt5} = %{_qt5_version}}
 
 %description
 Qt Serial Port provides the basic functionality, which includes configuring, I/O operations,
@@ -59,8 +59,11 @@ popd
 %{_qt5_examplesdir}/
 
 %changelog
-* Fri Sep 18 2020 liuweibo <liuweibo10@huawei.com> - 5.11.1-5
-- Fix Source0
+* Thu Mar 18 2021 maminjie <maminjie1@huawei.com> - 5.11.1-6
+- Fix syntax error when macro is not defined
+
+* Mon Sep 14 2020 liuweibo <liuweibo10@huawei.com> - 5.11.1-5
+- Fix Source0 
 
 * Fri Feb 14 2020 lingsheng <lingsheng@huawei.com> - 5.11.1-4
 - Package init