[Bug debuginfod/27983] debuginfod client should eliminate duplicate outgoing server urls

https://sourceware.org/bugzilla/show_bug.cgi?id=27983 Frank Ch. Eigler changed: What|Removed |Added Status|NEW |RESOLVED Resolution|---

[PATCH v2] configure.ac: rework gnu99 ext check to allow clang

It is true that Clang does not support all gnu99 extensions [1], but not all of them are used in the codebase and over time there have been code cleanup efforts to improve Clang support. For example after commit 779c57ea ("readelf: Pull advance_pc() in file scope") there are no more nested functio