Disable LTO on riscv64

Signed-off-by: David Abdurachmanov <davidlt@rivosinc.com>

tcl.spec

@@ -5,7 +5,7 @@
 Summary: Tool Command Language, pronounced tickle
 Name: tcl
 Version: %{vers}
-Release: 3%{?dist}
+Release: 3.0.riscv64%{?dist}
 Epoch: 1
 License: TCL
 URL: http://tcl.sourceforge.net/
@@ -69,6 +69,10 @@ chmod -x generic/tclStrToD.c
 %patch3 -p1 -b .tcltests-path-fix
 
 %build
+%ifarch riscv64
+%define _lto_cflags %{nil}
+%endif
+
 pushd unix
 autoconf
 %configure \
@@ -144,6 +148,9 @@ rm -rf %{buildroot}/%{_datadir}/%{name}%{majorver}/ldAix
 %{_datadir}/%{name}%{majorver}/tclAppInit.c
 
 %changelog
+* Mon Sep 05 2022 David Abdurachmanov <davidlt@rivosinc.com> - 1:8.6.12-3.0.riscv64
+- Disable LTO for riscv64
+
 * Sat Jul 23 2022 Fedora Release Engineering <releng@fedoraproject.org> - 1:8.6.12-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_37_Mass_Rebuild