CONFIG_MACH_GUMSTIX_F is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_MACH_GUMSTIX_F.
Result is shown for kernelversion 5.3.7

Basix, Connex, ws-200ax, ws-400ax systems

configname: CONFIG_MACH_GUMSTIX_F

Linux Kernel Configuration
└─>Intel PXA2xx/PXA3xx Implementations
└─>Basix, Connex, ws-200ax, ws-400ax systems
In linux kernel since version 2.6.26 (release Date: 2008-07-13)