Use %{set_build_flags} to set both CFLAGS and LDFLAGS

amtterm.spec

@@ -1,7 +1,7 @@
 Name:         amtterm
 License:      GPLv2+
 Version:      1.6
-Release:      4%{?dist}
+Release:      5%{?dist}
 Summary:      Serial-over-lan (sol) client for Intel AMT
 Group:        Applications/Internet
 URL:          http://www.kraxel.org/blog/linux/amtterm/
@@ -23,7 +23,7 @@ about and remotely control AMT managed computers.
 %setup -q
 
 %build
-export CFLAGS="%{optflags}"
+%{set_build_flags}
 make prefix=/usr
 
 %install
@@ -43,6 +43,9 @@ desktop-file-install --dir=%{buildroot}%{_datadir}/applications/ \
 %{_datadir}/applications/gamt.desktop
 
 %changelog
+* Wed Feb 21 2018 Florian Weimer <fweimer@redhat.com> - 1.6-5
+- Use %%{set_build_flags} to set both CFLAGS and LDFLAGS
+
 * Wed Feb 07 2018 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild