-> install build dependencies:
$ tce-load -wi compiletc 

-> per TC wiki, for maximum compatibility:
$ export CFLAGS="-mtune=generic -Os -pipe"
$ export CXXFLAGS="-mtune=generic -Os -pipe"
$ export LDFLAGS="-Wl,-O1"

-> fix hardwired path:
$ sed -i 's|/etc/acpi/events|/usr/local/etc/acpi/events|' acpid.h

-> finally:
$ ./configure --prefix=/usr/local
$ make
$ mkdir /opt/dest; sudo make DESTDIR=/opt/dest install

-> copy these directories from existing acpid.tcz extension:
/usr/local/share/etc/
/usr/local/share/share/
/usr/local/share/tce.installed/