Disable LTO on riscv64

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

lldb.spec

@@ -10,7 +10,7 @@
 
 Name:		lldb
 Version:	%{lldb_version}%{?rc_ver:~rc%{rc_ver}}
-Release:	1%{?dist}
+Release:	1.0.riscv64%{?dist}
 Summary:	Next generation high-performance debugger
 
 License:	Apache-2.0 WITH LLVM-exception OR NCSA
@@ -71,7 +71,11 @@ The package contains the LLDB Python module.
 %autosetup -n %{lldb_srcdir} -p2
 
 %build
+%ifnarch riscv64
 %global _lto_cflags -flto=thin
+%else
+%global _lto_cflags %{nil}
+%endif
 
 %cmake -GNinja \
 	-DCMAKE_BUILD_TYPE=RelWithDebInfo \
@@ -134,6 +138,9 @@ rm -f %{buildroot}%{python3_sitearch}/six.*
 %{python3_sitearch}/lldb
 
 %changelog
+* Thu Mar 28 2024 David Abdurachmanov <davidlt@rivosinc.com> - 18.1.1-1.0.riscv64
+- Disable LTO on riscv64
+
 * Tue Mar 12 2024 Tom Stellard <tstellar@redhat.com> - 18.1.1-1
 - 18.1.1 Release