menu "Toolchain options" comment "General toolchain options" config USE_SYSROOT bool prompt "Use sysroot'ed toolchain" default y help Use the 'shinny new' sysroot feature of gcc: libraries split between prefix/target/sys-root/lib and prefix/target/sys-root/usr/lib You definitely want to say 'Y' here. Yes you do. I know you do. Say 'Y'. config SHARED_LIBS bool prompt "Build shared libraries" default y help Say 'y' here, unless you don't want shared libraries. You might not want shared librries if you're building for a target that don't support it (maybe some nommu targets, for example, or bare metal). config TARGET_MULTILIB bool # prompt "Enable 'multilib' support (EXPERIMENTAL)" default n help Enable the so-called 'multilib' support. With the same toolchain, and on some architectures, you will be able to build big and little endian binaries, soft- and hard-float, etc... See the gcc configure manual at http://gcc.gnu.org/install/configure.html to see what multilib your target supports. It's preferable for now to build two (or more) toolchains, one for each configuration you need to support (eg. one for thumb and one for ARM, etc...). You can use the vendor string to diferentiate those toolchains. config TARGET_VENDOR string prompt "Vendor string" default "unknown" help Vendor part of the machine triplet. A triplet is of the form arch-vendor-kernel-system. You can set the second part, vendor, to whatever you see fit. Use a single word, or use underscores "_" to separate words. Keep the default (unkown) if you don't know better. config TARGET_ALIAS string prompt "Target alias" default "" help Normaly, you'd call your toolchain component (especially gcc) by prefixing the target triplet followed by a dash and the component name (eg. armeb-unknown-linux-uclibc-gcc). You can enter a shortcut here. This string will be used to create symbolic links to the toolchain tools (eg. if you enter "foo-bar" here, then gcc for your toolchain will also be available as "foo-bar-gcc" along with the original name). You shouldn't need to enter anything here, unless you plan to manually call the tools (autotools-based ./configure will use the standard name). comment "Toolchain type" choice bool prompt "Type" default CROSS config NATIVE bool prompt "Native (EXPERIMENTAL)" depends on EXPERIMENTAL help Build a native toolchain. See docs/overview.txt config CROSS bool prompt "Cross" help Build a cross-toolchain. See docs/overview.txt config CROSS_NATIVE bool prompt "Croos-native (EXPERIMENTAL)" depends on EXPERIMENTAL help Build a cross-native toolchain. See docs/overview.txt config CANADIAN bool prompt "Canadian (EXPERIMENTAL)" depends on EXPERIMENTAL help Build a canadian-toolchain. See docs/overview.txt endchoice config TOOLCHAIN_TYPE string default "native" if NATIVE default "cross" if CROSS default "cross-native" if CROSS_NATIVE default "canadian" if CANADIAN config BUILD string prompt "Build system triplet" default "" help Canonical name of the machine building the toolchain. You should leave empty, unless you really now what you're doing. config CC_NATIVE string prompt "Native gcc" default "gcc" help The native C compiler. You can set this to an alternative compiler if you have more than one installed (eg. gcc is gcc-4.1.1 and you want to use gcc-3.4.6). You can leave this empty as well, in which case gcc will be used. config HOST string prompt "Host system triplet" default "" depends on NATIVE || CANADIAN help Canonical name of the machine running the toolchain. config HOST_CC string prompt "Cross-compiler prefix for host system" default "${CT_HOST}-" depends on NATIVE || CANADIAN help C compiler targeting the host system. config TARGET_CC string prompt "Cross-compiler prefix for target system" default "${CT_TARGET}-" depends on CANADIAN help C compiler targeting the target system. endmenu