Andreas Schwab <schwab@xxxxxxxxxxxxxx> writes: > On Mai 19 2020, Eric W. Biederman wrote: > >> I am wondering if there are source trees for libc4 or libc5 around >> anywhere that we can look at to see how usage of uselib evolved. > > libc5 is available from archive.debian.org. > > http://archive.debian.org/debian-archive/debian/pool/main/libc/libc/libc_5.4.46.orig.tar.gz Interesting. It appears that the old a.out code to make use of uselib remained in the libc5 sources but it was all conditional on the being compiled not to use ELF. libc5 did provide a wrapper for the uselib system call. It appears glibc also provides a wrapper for the uselib system call named: uselib@GLIBC_2.2.5. I don't see a glibc header file that provides a declaration for uselib though. So the question becomes did anyone use those glibc wrappers. Eric