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+---
+layout: default
+title: Kernel non-obvious options for custom build
+date: 2026-02-08 17:44 +0100
+tags: kernel
+---
+Option names and configuration symbols based on kernel v6.12.
+
+
+h2. Bluetooth
+
+Sending files over e.g. @blueman@:
+
+* RFCOMM protocol support (@BT_RFCOMM@)
+
+h2. Security hardening
+
+Control flow Enforcement Technology, used when @cet@ USE flag is enabled for
+build toolchain:
+* Indirect Branch Tracking (@X86_KERNEL_IBT@)
+* X86 userspace shadow stack (@X86_USER_SHADOW_STACK@)
+
+h2. Wireguard
+
+* IP: policy routing (@IP_MULTIPLE_TABLES@)