The pmars package currently relies on an implicit declaration of the sighandler function for compiling src/xwindisp.c. Fixing this is kind of involved and likely not upstreamable given the prototype selection logic for sighandler, see src/pmars.c. So we should build this package in C89 mode for now.
I see a commit and a build, is this resolved?
Yes, indeed it is, I forgot to close the bug.