CONFIG_CDROM (not configurable)

modulename: cdrom.ko

configname: CONFIG_CDROM

Linux Kernel Configuration
└─>Device Drivers
└─>Block devices
└─>CDROM
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
drivers/cdrom/cdrom.c

depends
CONFIG_BLK_DEV

is depended by
CONFIG_BLK_DEV_IDECD