Re: [PATCH] Use sigaction and SA_RESTART in read-tree.c; add option in Makefile.

Jason Riedy [off-list ref] writes:

Also add a NO_SA_RESTART option in the Makefile in case someone
doesn't have SA_RESTART but does restart (maybe older HP/UX?).
We want the builder to chose this specifically in case the
system both lacks SA_RESTART and does not restart stdio calls;
a compat #define in git-compat-utils.h would silently allow
broken systems.

What am I missing...?