The makefile has this: edid-decode: edid-decode.c $(CC) -g -Wall -o $@ $< So the CFLAGS/LDFLAGS are ignored. See https://src.fedoraproject.org/rpms/redhat-rpm-config/blob/master/f/buildflags.md for information on RPM macros and environment variables provided by the build environment.
Fixed in the upstream makefile, built a new snapshot in xorg-x11-utils-7.5-27.fc28
Would you please put this into Fedora 28 as well?
xorg-x11-utils-7.5-28.fc28 has been submitted as an update to Fedora 28. https://bodhi.fedoraproject.org/updates/FEDORA-2018-aaa5020a20
xorg-x11-utils-7.5-28.fc28 has been pushed to the Fedora 28 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-aaa5020a20
xorg-x11-utils-7.5-28.fc28 has been pushed to the Fedora 28 stable repository. If problems still persist, please make note of it in this bug report.
My automated testing says that this was fixed properly, and now also verified manually. Thanks.