Warnings during compilation

[jsarenik]

Issue and Steps to Reproduce

Following warnings can be seen while compiling lightning on recent Linux distributions.

$ make
...
  CC       ccan/ccan/crypto/sha512/libwallycore_la-sha512.lo
<command-line>:0:0: warning: "_FORTIFY_SOURCE" redefined
<built-in>: note: this is the location of the previous definition
...
copying selected object files to avoid basename conflicts...
/usr/bin/ar: `u' modifier ignored since `D' is the default (see `U')
...

I am trying to compile rustyrussell/lightning@408dabb

getinfo output

not relevant

[jsarenik]

See https://gist.github.com/jsarenik/deac2376402cfb07ca6726bd7086cef2 for a full log which includes mentioned warnings.

[cdecker]

Seems to me like a dependency throwing some warnings, not much we can do about it on our end.

[jsarenik]

Thanks for pointing out it was in external dependency. I was just focusing on seeing the warnings instead of reading the context.

[jsarenik]

ElementsProject/libwally-core#36

[cdecker]

Thanks @jsarenik the upstream fix got merged and we'll upgrade libwally as soon as possible.