On Fri, Feb 5, 2021 at 4:00 PM Andrew Morton akpm@linux-foundation.org wrote:
On Fri, 5 Feb 2021 12:22:18 -0800 Nick Desaulniers ndesaulniers@google.com wrote:
We expect toolchains to produce these new debug info sections as part of DWARF v5. Add explicit placements to prevent the linker warnings from --orphan-section=warn.
Compilers may produce such sections with explicit -gdwarf-5, or based on the implicit default version of DWARF when -g is used via DEBUG_INFO. This implicit default changes over time, and has changed to DWARF v5 with GCC 11.
.debug_sup was mentioned in review, but without compilers producing it today, let's wait to add it until it becomes necessary.
There isn't anything in this changelog which explains why a -stable backport was requested? Or is there? Irritating linker warnings? More than that?
Users adopting GCC 11 will start to see warnings from the linker due to --orphan-section=warn when building the branches of the stable tree. Stable has IME accepted patches for permitting newer toolchains to continue to compile warning free.