slackware-current (32bit version) missing acpid after build, but slackware64-current has it. and both of them have kacpidmon, why is 32bit version missing acpid?
edit: missing header file, and missed a error message in 32bit build.
error was related to "KEY_MICMUTE undeclared" in input_layer.c file, which was input header file from older version linux/input.h file, need to upgrade it with newer version.
make sure you read this following part about slackware kernel-headers package, it is related to glibc. modified it cautiously.