Use gcc-toolset-13-gdb for gdb-add-index

Resolves: rhbz#2188418

clang.spec

@@ -2,6 +2,8 @@
 # See https://docs.fedoraproject.org/en-US/packaging-guidelines/#_compiler_macros
 %global toolchain clang
 
+%global gts_version 13
+
 %bcond_with compat_build
 %bcond_without bundle_compat_lib
 %bcond_without check
@@ -45,7 +47,7 @@
 
 Name:		%pkg_name
 Version:	%{clang_version}%{?rc_ver:~rc%{rc_ver}}
-Release:	4%{?dist}
+Release:	5%{?dist}
 Summary:	A C language family front-end for LLVM
 
 License:	Apache-2.0 WITH LLVM-exception OR NCSA
@@ -103,9 +105,11 @@ Patch201:   0001-clang-tools-extra-Make-test-dependency-on-LLVMHello-.patch
 #   tools statically to some static libraries from LLVM, we
 #   need to use libstdc++12 as well. So, use gcc-toolset-12
 #   to compile clang.
+# TODO: Update to use gts_version.
 BuildRequires: gcc-toolset-12-gcc-c++
 BuildRequires: gcc-toolset-12-annobin-plugin-gcc
 BuildRequires: gcc-toolset-12-libatomic-devel
+BuildRequires: gcc-toolset-%{gts_version}-gdb
 BuildRequires:	clang
 BuildRequires:	cmake
 BuildRequires:	ninja-build
@@ -441,6 +445,10 @@ mv ../cmake-%{compat_ver}.src ../cmake
 
 %install
 
+# Use newer GDB for gdb-add-index step, as system GDB can't handle the LTO debuginfo.
+source scl_source enable gcc-toolset-%{gts_version}
+export GDB=`which gdb`
+
 %cmake_install
 
 %if %{with bundle_compat_lib}
@@ -686,6 +694,9 @@ mv ./libclang-cpp.so.%{compat_maj_ver} "$compat_lib"
 
 %endif
 %changelog
+* Thu Jun 29 2023 Nikita Popov <npopov@redhat.com> - 16.0.1-5
+- Use gcc-toolset-13-gdb for gdb-add-index
+
 * Fri Jun 02 2023 Nikita Popov <npopov@redhat.com> - 16.0.1-4
 - Build with LTO