!5 [sync] PR-4: add buildrequires gcc-c++

From: @openeuler-sync-bot 
Reviewed-by: @dwl301 
Signed-off-by: @dwl301

libglademm.spec

@@ -1,6 +1,6 @@
 Name:           libglademm24
 Version:        2.6.7
-Release:        3
+Release:        4
 
 Summary:        C++ wrapper for libglade
 
@@ -14,6 +14,7 @@ Requires(post):   /sbin/ldconfig
 Requires(postun): /sbin/ldconfig
 BuildRequires:  gtkmm24-devel >= 2.6.0
 BuildRequires:  libglade2-devel >= 2.6.1
+BuildRequires:  gcc-c++
 
 %description
 This package provides a C++ interface for libglademm. It is a
@@ -78,5 +79,8 @@ rm -rf $RPM_BUILD_ROOT
 %{_libdir}/pkgconfig/*.pc
 
 %changelog
+* Sat Feb 12 2022 dillon chen <dillon.chen@gmail.com>  - 2.6.7-4
+- add buildrequires gcc-c++
+
 * Wed Jul 8 2020 Dillon Chen <dillon.chen@turbolinux.com.cn> - 2.6.7-1
 - Init package