Build with LTO

Resolves: rhbz#2188418

lldb.spec

@@ -2,12 +2,9 @@
 %global lldb_version 16.0.1
 %global lldb_srcdir %{name}-%{lldb_version}.src
 
-# LTO disabled for now to fix the build
-%global _lto_cflags %{nil}
-
 Name:		lldb
 Version:	%{lldb_version}
-Release:	1%{?dist}
+Release:	2%{?dist}
 Summary:	Next generation high-performance debugger
 
 License:	Apache-2.0 WITH LLVM-exception OR NCSA
@@ -18,13 +15,6 @@ Source2:	release-keys.asc
 
 Patch0: 0001-lldb-Change-LLVM_COMMON_CMAKE_UTILS-usage.patch
 
-# RHEL only: We build LLVM with clang, which now defaults to using the
-#   libstdc++ from gcc-toolset-12. Since we're linking some clang
-#   tools statically to some static libraries from LLVM, we
-#   need to use libstdc++12 as well. So, use gcc-toolset-12
-#   to compile clang.
-BuildRequires: gcc-toolset-12-gcc-c++
-BuildRequires: gcc-toolset-12-annobin-plugin-gcc
 BuildRequires:	clang
 BuildRequires:	cmake
 BuildRequires:	ninja-build
@@ -137,6 +127,9 @@ rm -f %{buildroot}%{python3_sitearch}/six.*
 %{python3_sitearch}/lldb
 
 %changelog
+* Fri May 05 2023 Nikita Popov <npopov@redhat.com> - 16.0.1-2
+- Build with LTO
+
 * Tue Apr 18 2023 Nikita Popov <npopov@redhat.com> - 16.0.1-1
 - Update to LLVM 16.0.1