buildroot/toolchain/external-toolchain/Config.in

#

if BR2_TOOLCHAIN_EXTERNAL
choice
	prompt "External toolchain C library"
	default BR2_TOOLCHAIN_EXTERNAL_UCLIBC

config BR2_TOOLCHAIN_EXTERNAL_UCLIBC
	bool "uClibc"

config BR2_TOOLCHAIN_EXTERNAL_GLIBC
	bool "glibc"

endchoice

config BR2_TOOLCHAIN_EXTERNAL_STRIP
        bool
        default y
        prompt "Strip shared libraries"
	help
	  Strip shared libraries copied from the external toolchain.
endif