On 10/29/21 10:09 AM, Reinette Chatre wrote: > On 10/28/2021 5:26 PM, Dave Hansen wrote: >> On 10/28/21 1:37 PM, Reinette Chatre wrote: >>> From: Sean Christopherson <sean.j.christopherson@xxxxxxxxx> >>> >>> Pass a build id of "none" to the linker to suppress a warning about the >>> build id being ignored: >>> >>> /usr/bin/ld: warning: .note.gnu.build-id section discarded, >>> --build-id >>> ignored. >> >> Do we have a good grasp on why this is producing a warning in the first >> place? This seems like something that could get merged quickly with one >> more sentence in the changelog. >> > > How about a new changelog as below: > > The enclave binary (test_encl.elf) is built with only three sections > (tcs, text, and data) as controlled by its custom linker script. > > If gcc is built with "--enable-linker-build-id" (this appears to be a > common configuration even if it is by default off) then gcc will pass > "--build-id" to the linker that will prompt it (the linker) to to write > unique bits identifying the linked file to a ".note.gnu.build-id" section. > > The section ".note.gnu.build-id" does not exist in the test enclave > resulting in the following warning emitted by the linker: > > /usr/bin/ld: warning: .note.gnu.build-id section discarded, --build-id > ignored > > The test enclave does not use the build id within the binary so fix the > warning by passing a build id of "none" to the linker that will disable > the setting from any earlier "--build-id" options and thus disable the > attempt to write the build id to a ".note.gnu.build-id" section that > does not exist. Looks great, thanks for putting that together!
