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linux-7.2.3/net/bluetooth/rfcomm/Kconfig

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+# SPDX-License-Identifier: GPL-2.0-only
+config BT_RFCOMM
+	tristate "RFCOMM protocol support"
+	depends on BT_BREDR
+	help
+	  RFCOMM provides connection oriented stream transport.  RFCOMM
+	  support is required for Dialup Networking, OBEX and other Bluetooth
+	  applications.
+
+	  Say Y here to compile RFCOMM support into the kernel or say M to
+	  compile it as module (rfcomm).
+
+config BT_RFCOMM_TTY
+	bool "RFCOMM TTY support"
+	depends on BT_RFCOMM
+	depends on TTY
+	help
+	  This option enables TTY emulation support for RFCOMM channels.
+

linux-7.2.3/net/bluetooth/rfcomm/Makefile

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+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the Linux Bluetooth RFCOMM layer.
+#
+
+obj-$(CONFIG_BT_RFCOMM) += rfcomm.o
+
+rfcomm-y			:= core.o sock.o
+rfcomm-$(CONFIG_BT_RFCOMM_TTY)	+= tty.o