Hi - > According to 'man 3 printf' %j appeared in glibc 2.1 and seems to be C99 > feature. That's decidedly ancient.
OK. > And may I be allowed to suggest, unless elfutils is tested in upstream CI > with decade-old toolchains, you should not be considering its compatibility > with them. Deployment of elfutils is not limited to platforms that happen to be included in upstream CI that you see. RHEL7 uses glibc 2.17 from 2012; RHEL6 years before that. We do not wish to unnecessarily break them. - FChE