Add missing BR for gcc-c++

wxGTK3.spec

@@ -18,7 +18,7 @@
 
 Name:           %{wxgtkname}
 Version:        3.0.3
-Release:        9%{?snapshottag}%{?dist}
+Release:        10%{?snapshottag}%{?dist}
 Summary:        GTK port of the wxWidgets GUI library
 License:        wxWidgets
 Group:          System Environment/Libraries
@@ -42,6 +42,7 @@ Patch1:         %{name}-%{version}-webkit2.patch
 # https://github.com/wxWidgets/wxWidgets/commit/ce1dce113c5eda42f49ba3278bb21c61872ca37d
 Patch2:         %{name}-%{version}-avoid-tlw-destroy-assert.patch
 
+BuildRequires:  gcc-c++
 BuildRequires:  gtk2-devel
 BuildRequires:  gtk3-devel
 BuildRequires:  webkit2gtk3-devel
@@ -514,6 +515,9 @@ fi
 %doc docs/doxygen/out/xml/*
 
 %changelog
+* Mon Feb 19 2018 Scott Talbert <swt@techie.net> - 3.0.3-10
+- Add missing BR for gcc-c++
+
 * Fri Feb 09 2018 Fedora Release Engineering <releng@fedoraproject.org> - 3.0.3-9
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild