Re-enable LTO

libcaca.spec

@@ -6,7 +6,7 @@
 Summary: Library for Colour AsCii Art, text mode graphics
 Name: libcaca
 Version: 0.99
-Release: 0.50.%{beta}%{?dist}
+Release: 0.51.%{beta}%{?dist}
 License: WTFPL
 URL: http://caca.zoy.org/wiki/libcaca
 Source: http://caca.zoy.org/files/libcaca/libcaca-%{version}.%{beta}.tar.gz
@@ -99,10 +99,12 @@ done
 %build
 # This package has a configure test which uses ASMs, but does not link the
 # resultant .o files.  As such the ASM test is always successful, even on
-# architectures were the ASM is not valid.   The test should be fixed,
-# or alternately we could consider using -ffat-lto-objects, though we
-# generally recommend against that.  For now, disable LTO.
-%define _lto_cflags %{nil}
+# architectures were the ASM is not valid when compiling with LTO.
+#
+# -ffat-lto-objects is sufficient to address this issue.  It is the default
+# for F33, but is expected to only be enabled for packages that need it in
+# F34, so we use it here explicitly
+%define _lto_cflags -flto=auto -ffat-lto-objects
 
 export LDFLAGS="$(pkg-config --libs gio-2.0) $LDFLAGS"
 
@@ -176,6 +178,9 @@ rm -f %{buildroot}%{_docdir}/libcucul-dev
 
 
 %changelog
+* Fri Aug 21 2020 Jeff Law <aw@redhat.com> - 0.99-0.51.beta19
+- Re-enable LTO
+
 * Tue Jul 28 2020 Fedora Release Engineering <releng@fedoraproject.org> - 0.99-0.50.beta19
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild