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@intel.com
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!