Three correctness fixes to the --shared build path:
- Only skipped rebuilding a .pic.o when it existed at all, never checking
whether the source .cpp was newer - confirmed live: Tag.pic.o (and 6
other JetCore objects) sat uncompiled since 2026-08-25 while Tag.cpp
itself picked up same-day fixes, so every .jtc silently ran yesterday's
JetCore code.
- Only re-archive libCoreUtils_pic.a when a member object actually changed,
instead of unconditionally on every build.
- Link to a temp file in the same directory, then rename() it into place,
instead of linking directly onto the live .jtc path. A running APIServer
may already have that exact path dlopen()ed (hot-reload watches this
directory) - overwriting it in place corrupts the live mapping's code
pages out from under the process, causing a dlclose() SIGSEGV the next
time it reloads. rename() never touches the old inode, so anything with
it still mapped keeps seeing the unmodified original.
Brad Arant
54b6e522f9