Add BuildRequires: gcc

See https://fedoraproject.org/wiki/Changes/Remove_GCC_from_BuildRoot

ncdu.spec

@@ -1,12 +1,13 @@
 Name:           ncdu
 Version:        1.13
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Text-based disk usage viewer
 
 License:        MIT
 URL:            http://dev.yorhel.nl/ncdu/
 Source0:        http://dev.yorhel.nl/download/ncdu-%{version}.tar.gz
 
+BuildRequires:  gcc
 BuildRequires:  ncurses-devel
 
 %description
@@ -29,6 +30,10 @@ make install DESTDIR=%{buildroot}
 %{_bindir}/ncdu
 
 %changelog
+* Sat Feb 24 2018 Richard Fearn <richardfearn@gmail.com> - 1.13-3
+- Add BuildRequires: gcc
+  (see https://fedoraproject.org/wiki/Changes/Remove_GCC_from_BuildRoot)
+
 * Thu Feb 08 2018 Fedora Release Engineering <releng@fedoraproject.org> - 1.13-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild