add Buildrequires: gcc

https://fedoraproject.org/wiki/Packaging:C_and_C++

alpine.spec

@@ -6,7 +6,7 @@
 Summary: powerful, easy to use console email client
 Name: alpine
 Version: 2.21
-Release: 5%{?dist}
+Release: 6%{?dist}
 
 License: ASL 2.0
 # Upstream change - see https://groups.google.com/forum/#!msg/comp.mail.pine/4w_f1ro6GRA/faiu1Egw_ywJ
@@ -50,6 +50,7 @@ Requires: hunspell
 Requires: mailcap
 Requires: /usr/sbin/sendmail
 
+BuildRequires: gcc
 
 %description
 Alpine -- an Alternatively Licensed Program for Internet
@@ -120,6 +121,10 @@ touch $RPM_BUILD_ROOT%{_sysconfdir}/pine.conf.fixed
 
 
 %changelog
+* Tue Mar 06 2018 josef radinger <cheese@nosuchhost.net> - 2.21-6
+- add Buildrequires: gcc
+  https://fedoraproject.org/wiki/Packaging:C_and_C++
+
 * Wed Feb 07 2018 Fedora Release Engineering <releng@fedoraproject.org> - 2.21-5
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild