Merge pull request #32 from brain-hackers/ci-build20220125

Fix CI build

.github/workflows/build.yml

@@ -87,6 +87,41 @@ jobs:
           asset_name: listconfig
           asset_content_type: text/plain
 
+  build-linux-x1:
+    runs-on: ubuntu-20.04
+    needs: [create_release]
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - name: Workaround for apt update failure
+        run: sudo rm /etc/apt/sources.list.d/github_git-lfs.*
+      - name: Install deps
+        run: sudo apt update && sudo apt install build-essential bison flex libncurses5-dev gcc-arm-linux-gnueabihf libssl-dev lzop qemu-user-static debootstrap
+      - name: Configure for Linux
+        run: make ldefconfig-x1
+      - name: Build Linux
+        run: make lbuild
+      - name: Setup releases
+        id: release_name
+        run: |
+          mkdir release
+          cp ./linux-brain/arch/arm/boot/dts/imx7ulp-pwh*.dtb release/
+          cp ./linux-brain/arch/arm/boot/zImage release/zImage
+          zip -r release.zip release/
+      - name: Generate archive name
+        id: archive_name
+        run: echo ::set-output name=name::linux-x1-${GITHUB_REF/refs\/*s\//}
+      - name: Upload release.zip
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ needs.create_release.outputs.upload_url }}
+          asset_path: release.zip
+          asset_name: ${{ steps.archive_name.outputs.name }}.zip
+          asset_content_type: application/zip
+
   build-uboot:
     runs-on: ubuntu-20.04
     needs: [create_release]
@@ -145,6 +180,45 @@ jobs:
           asset_name: ${{ steps.archive_name.outputs.name }}.zip
           asset_content_type: application/zip
 
+  build-uboot-x1:
+    runs-on: ubuntu-20.04
+    needs: [create_release]
+    strategy:
+      matrix:
+        include:
+          - model: h1
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - name: Workaround for apt update failure
+        run: sudo rm /etc/apt/sources.list.d/github_git-lfs.*
+      - name: Install deps
+        run: sudo apt update && sudo apt install build-essential bison flex libncurses5-dev gcc-arm-linux-gnueabihf libssl-dev lzop qemu-user-static debootstrap
+      - name: Configure for U-Boot
+        run: make udefconfig-${{ matrix.model }}
+      - name: Build U-Boot
+        run: make ubuild
+      - name: Setup releases
+        id: release_name
+        run: |
+          mkdir release
+          cp ./u-boot-brain/u-boot.bin release/u-boot.bin
+          zip -r release.zip release/
+      - name: Generate archive name
+        id: archive_name
+        run: echo ::set-output name=name::uboot-${{ matrix.model }}-${GITHUB_REF/refs\/*s\//}
+      - name: Upload release.zip
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ needs.create_release.outputs.upload_url }}
+          asset_path: release.zip
+          asset_name: ${{ steps.archive_name.outputs.name }}.zip
+          asset_content_type: application/zip
+
   build-sd:
     runs-on: ubuntu-20.04
     needs: [create_release]
@@ -181,3 +255,46 @@ jobs:
           asset_name: ${{ steps.image_name.outputs.name }}.zip
           asset_content_type: application/zip
 
+  build-sd-x1:
+    runs-on: ubuntu-20.04
+    needs: [create_release]
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - name: Workaround for apt update failure
+        run: sudo rm /etc/apt/sources.list.d/github_git-lfs.*
+      - name: Install deps
+        run: sudo apt update && sudo apt install kpartx build-essential bison flex libncurses5-dev gcc-arm-linux-gnueabihf libssl-dev lzop qemu-user-static debootstrap
+      - name: Upgrade pip and setuptools
+        run: pip3 install -U pip setuptools
+      - name: Install pyelftools
+        run: pip3 install pyelftools
+      - name: Build Boot4u
+        run: make boot4ubuild
+      - name: Configure for U-Boot
+        run: make udefconfig-h1
+      - name: Build U-Boot
+        run: make ubuild
+      - name: Configure for Linux
+        run: make ldefconfig-x1
+      - name: Build Linux
+        run: make lbuild
+      - name: Build Debian Root
+        run: make brainux
+      - name: Generate image name
+        id: image_name
+        run: echo ::set-output name=name::sdimage-x1-${GITHUB_REF/refs\/*s\//}
+      - name: Build SD image
+        run: make image/sd_x1.img && mv image/sd_x1.img ${{ steps.image_name.outputs.name }}.img
+      - name: Compress
+        run: zip ${{ steps.image_name.outputs.name }}.zip ${{ steps.image_name.outputs.name }}.img
+      - name: Upload the image
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ needs.create_release.outputs.upload_url }}
+          asset_path: ${{ steps.image_name.outputs.name }}.zip
+          asset_name: ${{ steps.image_name.outputs.name }}.zip
+          asset_content_type: application/zip

.gitmodules

@@ -7,3 +7,6 @@
 [submodule "nkbin_maker"]
 	path = nkbin_maker
 	url = https://github.com/brain-hackers/nkbin_maker.git
+[submodule "boot4u"]
+	path = boot4u
+	url = https://github.com/brain-hackers/boot4u

Makefile

@@ -1,7 +1,9 @@
 JOBS=$(shell grep -c '^processor' /proc/cpuinfo)
 
+UBOOT_CROSS=$(shell ./tools/getcross u-boot)
+LINUX_CROSS=$(shell ./tools/getcross linux)
+ROOTFS_CROSS=$(shell ./tools/getcross rootfs)
 export ARCH=arm
-export CROSS_COMPILE=arm-linux-gnueabi-
 
 .PHONY:
 setup:
@@ -33,11 +35,11 @@ udefconfig-%:
 
 .PHONY:
 usavedefconfig:
-	make -C ./u-boot-brain savedefconfig
+	make CROSS_COMPILE=$(UBOOT_CROSS) -C ./u-boot-brain savedefconfig
 
 .PHONY:
 umenuconfig:
-	make -C ./u-boot-brain menuconfig
+	make CROSS_COMPILE=$(UBOOT_CROSS) -C ./u-boot-brain menuconfig
 
 .PHONY:
 uclean:
@@ -45,28 +47,65 @@ uclean:
 
 .PHONY:
 ubuild:
-	make -j$(JOBS) -C ./u-boot-brain u-boot.sb
+	if [ "$(UBOOT_CROSS)" = "arm-linux-gnueabi-" ]; then \
+		make CROSS_COMPILE=$(UBOOT_CROSS) -j$(JOBS) -C ./u-boot-brain u-boot.sb; \
+	else \
+		make CROSS_COMPILE=$(UBOOT_CROSS) -j$(JOBS) -C ./u-boot-brain u-boot.imx; \
+	fi
 
 .PHONY:
 ldefconfig:
 	make -C ./linux-brain brain_defconfig
 
+.PHONY:
+ldefconfig-x1:
+	make -C ./linux-brain imx_v7_defconfig
+
 .PHONY:
 lmenuconfig:
-	make -C ./linux-brain menuconfig
+	make CROSS_COMPILE=$(LINUX_CROSS) -C ./linux-brain menuconfig
 
 .PHONY:
 lsavedefconfig:
-	make -C ./linux-brain savedefconfig
+	make CROSS_COMPILE=$(LINUX_CROSS) -C ./linux-brain savedefconfig
 	mv ./linux-brain/defconfig ./linux-brain/arch/arm/configs/brain_defconfig
 
+.PHONY:
+lsavedefconfig-x1:
+	make CROSS_COMPILE=$(LINUX_CROSS) -C ./linux-brain savedefconfig
+	mv ./linux-brain/defconfig ./linux-brain/arch/arm/configs/imx_v7_defconfig
+
 .PHONY:
 lclean:
 	make -C ./linux-brain distclean
 
 .PHONY:
 lbuild:
-	make -j$(JOBS) -C ./linux-brain
+	make CROSS_COMPILE=$(LINUX_CROSS) -j$(JOBS) -C ./linux-brain
+
+.PHONY:
+ldebpkg:
+	$(MAKE) ldebpkg-build || $(MAKE) ldebpkg-clean
+	mkdir -p debian
+	mv linux-*.buildinfo debian/
+	mv linux-*.changes debian/
+	mv linux-*.diff.gz debian/
+	mv linux-*.dsc debian/
+	mv linux-*.orig.tar.gz debian/
+	mv linux-*.deb debian/
+
+.PHONY:
+ldebpkg-build:
+	make -j$(JOBS) -C ./linux-brain deb-pkg
+
+.PHONY:
+ldebpkg-clean:
+	rm -f linux-*.buildinfo
+	rm -f linux-*.changes
+	rm -f linux-*.diff.gz
+	rm -f linux-*.dsc
+	rm -f linux-*.orig.tar.gz
+	rm -f linux-*.deb
 
 .PHONY:
 uuu:
@@ -80,17 +119,25 @@ nkbin-maker:
 nk.bin:
 	./nkbin_maker/bsd-ce ./u-boot-brain/u-boot.bin
 
+.PHONY:
+boot4ubuild:
+	make -C ./boot4u
+
+.PHONY:
+boot4uclean:
+	make -C ./boot4u clean
+
 brainux:
 	@if [ "$(shell uname)" != "Linux" ]; then \
 		echo "Debootstrap is only available in Linux!"; \
 		exit 1; \
 	fi
-	mkdir -p brainux
+	sudo mkdir -p brainux
 	@if [ "$(CI)" = "true" ]; then \
 		echo "I'm in CI and debootstrap without cache."; \
-		sudo debootstrap --arch=armel --foreign buster brainux/; \
+		sudo debootstrap --arch=$(ROOTFS_CROSS) --foreign buster brainux/; \
 	else \
-		sudo debootstrap --arch=armel --foreign buster brainux/ http://localhost:65432/debian/; \
+		sudo debootstrap --arch=$(ROOTFS_CROSS) --foreign buster brainux/ http://localhost:65432/debian/; \
 	fi
 	sudo cp /usr/bin/qemu-arm-static brainux/usr/bin/
 	sudo cp ./os-brainux/setup_brainux.sh brainux/
@@ -101,6 +148,9 @@ brainux:
 image/sd.img: clean_work
 	./image/build_image.sh
 
+image/sd_x1.img: clean_work
+	./image/build_image_x1.sh
+
 .PHONY:
 clean_work:
 	sudo rm -rf image/work

README.md

@@ -3,7 +3,7 @@ buildbrain
 
 This repository includes:
 
- - linux-brain, u-boot-brain and nkbin_maker as submodules
+ - linux-brain, u-boot-brain, nkbin_maker and boot4u as submodules
  - Useful build targets in Makefile
  - r3build.toml to watch changes that occur in submodules
 
@@ -12,6 +12,7 @@ Confirmed environments
 ----------------------
 
 - Debian 10 (buster) amd64
+- Debian 11 (bullseye) amd64
 
 
 Getting Started
@@ -20,7 +21,7 @@ Getting Started
 1. Install dependencies.
 
     ```
-    $ sudo apt install build-essential bison flex libncurses5-dev gcc-arm-linux-gnueabi
+    $ sudo apt install build-essential bison flex libncurses5-dev gcc-arm-linux-gnueabi gcc-arm-linux-gnueabihf libssl-dev bc lzop qemu-user-static debootstrap kpartx libyaml-dev python3-pyelftools
     ```
 
 1. Clone this repository with recursive clone enabled.
@@ -41,34 +42,47 @@ Getting Started
     - Put `uuu` where the PATH executable points to.
 
 
-Build and inject U-Boot
+Build U-Boot
 -----------------------
 
 1. Run `make udefconfig-sh*` to generate `.config`.
 
     - For Sx1: `make udefconfig-sh1`
     - For Sx6: `make udefconfig-sh6`
+    - For x1:  `make udefconfig-h1`
 
-2. Run `make ubuild` to build whole repository and generate `u-boot.sb`.
+2. Run `make ubuild` to build whole repository and generate `u-boot.sb` or `u-boot.bin`.
 
     - i.MX283 loads a packed U-Boot executable called `u-boot.sb`.
 
-3. To inject the executable into i.MX283 in recovery mode, run `make uuu`.
 
+Inject U-Boot into i.MX283 in recovery mode
+-----------------------
+1. Follow `Build U-Boot` procedure to make U-Boot binary.
+
+1. Run `make uuu`
 
 Build and make NK.bin
 -----------------------
 
-1. Run `make udefconfig` to generate `.config`.
+1. Follow `Build U-Boot` procedure to make U-Boot binary.
 
-2. Run `make ubuild` to build whole repository and generate `u-boot.bin`.
+1. Run `make nkbin-maker`.
 
-3. Run `make nkbin-maker`.
-
-4. To make `nk.bin`, run `make nk.bin`.
+1. To make `nk.bin`, run `make nk.bin`.
 
     - nkbin_maker packs `u-boot.bin` into `nk.bin`.
 
+Build and deploy boot4u
+-----------------------
+
+1. Run `make boot4u`
+
+1. Create index.din and copy AppMain.bin
+    - `mkdir /path/to/your/sd/1st/partition/App/boot4u`
+    - `touch /path/to/your/sd/1st/partition/App/boot4u/index.din`
+    - `cp boot4u/AppMain.bin  /path/to/your/sd/1st/partition/App/boot4u/`
+
 
 Build Linux
 -----------
@@ -80,8 +94,8 @@ Build Linux
 1. Confirm that `linux-brain/arch/arm/boot/zImage` exists.
 
 
-Bootstrap Debian 10 (buster)
-----------------------------
+Bootstrap Debian 11 (bullseye)
+------------------------------
 
 1. Run `make ldefconfig lbuild`.
 
@@ -89,10 +103,15 @@ Bootstrap Debian 10 (buster)
 
 1. Run `make brainux`.
 
-1. Run `make image.sd.img`
+1. Run `make image/sd.img`
 
 1. Confirm that `image/sd.img` is built and burn it to an SD card.
 
+Known issues
+----------------------------------------
+If you using gcc 10 for host compiler, `make ubuild` may fail.  
+To complete build, open `/u-boot-brain/scripts/dtc/dtc-lexer.lex.c` or `/u-boot-brain/scripts/dtc/dtc-parser.tab.c` then comment out `YYLTYPE yylloc;`
+
 Watch changes in submodules & auto-build
 ----------------------------------------
 

image/build_image.sh

@@ -6,6 +6,7 @@ REPO=$(git rev-parse --show-toplevel)
 WORK=${REPO}/image/work
 LINUX=${REPO}/linux-brain
 IMG=${REPO}/image/sd.img
+export CROSS_COMPILE=arm-linux-gnueabi-
 
 mkdir -p ${WORK}
 
@@ -40,7 +41,7 @@ sfdisk ${IMG} < ${WORK}/part.sfdisk
 
 sudo kpartx -av ${IMG}
 
-LOOPDEV=$(losetup -l | grep sd.img | grep -o 'loop.')
+LOOPDEV=$(losetup -l | grep sd.img | grep -o 'loop.' | tail -n 1)
 
 sudo mkfs.fat -F32 -v -I /dev/mapper/${LOOPDEV}p1
 sudo mkfs.ext4 /dev/mapper/${LOOPDEV}p2

image/build_image_x1.sh

@@ -0,0 +1,52 @@
+#!/bin/bash
+set -uex -o pipefail
+
+JOBS=$(nproc)
+REPO=$(git rev-parse --show-toplevel)
+WORK=${REPO}/image/work
+LINUX=${REPO}/linux-brain
+IMG=${REPO}/image/sd_x1.img
+export CROSS_COMPILE=arm-linux-gnueabihf-
+
+mkdir -p ${WORK}
+
+dd if=/dev/zero of=${IMG} bs=1M count=3072
+
+START1=2048
+SECTORS1=$((1024 * 1024 * 64 / 512))
+START2=$((2048 + ${SECTORS1}))
+
+cat <<EOF > ${WORK}/part.sfdisk
+${IMG}1 : start=${START1}, size=${SECTORS1}, type=b
+${IMG}2 : start=${START2}, type=83
+EOF
+
+sfdisk ${IMG} < ${WORK}/part.sfdisk
+
+sudo kpartx -av ${IMG}
+
+LOOPDEV=$(losetup -l | grep sd_x1.img | grep -o 'loop.')
+
+sudo mkfs.fat -F32 -v -I /dev/mapper/${LOOPDEV}p1
+sudo mkfs.ext4 /dev/mapper/${LOOPDEV}p2
+
+mkdir -p ${WORK}/p1 ${WORK}/p2
+sudo mount /dev/mapper/${LOOPDEV}p1 ${WORK}/p1
+sudo mount /dev/mapper/${LOOPDEV}p2 ${WORK}/p2
+
+sudo cp ${LINUX}/arch/arm/boot/zImage ${WORK}/p1/
+sudo cp ${LINUX}/arch/arm/boot/dts/imx7ulp-pwh*.dtb ${WORK}/p1/
+
+sudo cp ${REPO}/u-boot-brain/u-boot.bin ${WORK}/p1/
+
+sudo mkdir -p ${WORK}/p1/App/boot4u
+sudo cp ${REPO}/boot4u/AppMain.bin ${WORK}/p1/App/boot4u/
+sudo touch ${WORK}/p1/App/boot4u/index.din
+
+sudo cp -ra ${REPO}/brainux/* ${WORK}/p2/
+
+sudo umount ${WORK}/p1 ${WORK}/p2
+sudo kpartx -d ${IMG}
+
+rmdir ${WORK}/p1 ${WORK}/p2
+

os-brainux/override.sh

@@ -15,5 +15,9 @@ install -g root -o root -m 0644 $SRC/etc/X11/Xsession.d/96calibrate $DST/etc/X11
 
 install -g root -o root -m 0644 -D $SRC/etc/xdg/weston/weston.ini $DST/etc/xdg/weston/weston.ini
 
-install -g root -o root -m 0644 -D $SRC/home/user/lxterminal/lxterminal.conf $DST/home/user/lxterminal/lxterminal.conf
+install -g 1000 -o 1000 -m 0644 $SRC/home/user/.xprofile $DST/home/user/.xprofile
+sudo -u#1000 -g#1000 mkdir -p $DST/home/user/.config/fcitx
+install -g 1000 -o 1000 -m 0644 $SRC/home/user/.config/fcitx/profile $DST/home/user/.config/fcitx/profile
+sudo -u#1000 -g#1000 mkdir -p $DST/home/user/lxterminal
+install -g 1000 -o 1000 -m 0644 $SRC/home/user/lxterminal/lxterminal.conf $DST/home/user/lxterminal/lxterminal.conf
 install -g root -o root -m 0644 -D $SRC/etc/jwm/system.jwmrc $DST/etc/jwm/system.jwmrc

os-brainux/override/home/user/.xprofile

@@ -0,0 +1,7 @@
+export GTK_IM_MODULE=fcitx
+export QT_IM_MODULE=fcitx
+export XMODIFIERS=@im=fcitx
+
+# Uncomment the following line to enable fcitx-mozc
+# fcitx-autostart &
+

os-brainux/override/usr/lib/os-release

@@ -1,8 +1,8 @@
-PRETTY_NAME="Brainux GNU/Linux 10 (buster)"
+PRETTY_NAME="Brainux GNU/Linux 11 (bullseye)"
 NAME="Brainux GNU/Linux"
-VERSION_ID="10"
-VERSION="10 (buster)"
-VERSION_CODENAME=buster
+VERSION_ID="11"
+VERSION="11 (bullseye)"
+VERSION_CODENAME=bullseye
 ID=debian
 HOME_URL="https://github.com/brain-hackers/README"
 SUPPORT_URL="https://github.com/brain-hackers/buildbrain"

os-brainux/setup_brainux.sh

@@ -20,12 +20,12 @@ else
 fi
 
 cat <<EOF > /etc/apt/sources.list
-deb http://${REPO}/debian buster main contrib non-free
-deb-src http://${REPO}/debian buster main contrib non-free
-deb http://${REPO}/debian buster-updates main contrib non-free
-deb-src http://${REPO}/debian buster-updates main contrib non-free
-deb http://${REPO_SECURITY}/debian-security buster/updates main contrib non-free
-deb-src http://${REPO_SECURITY}/debian-security buster/updates main contrib non-free
+deb http://${REPO}/debian bullseye main contrib non-free
+deb-src http://${REPO}/debian bullseye main contrib non-free
+deb http://${REPO}/debian bullseye-updates main contrib non-free
+deb-src http://${REPO}/debian bullseye-updates main contrib non-free
+deb http://${REPO_SECURITY}/debian-security bullseye-security/updates main contrib non-free
+deb-src http://${REPO_SECURITY}/debian-security bullseye-security/updates main contrib non-free
 EOF
 
 cat <<EOF > /etc/apt/apt.conf.d/90-norecommend
@@ -34,7 +34,8 @@ APT::Install-Suggests "0";
 EOF
 
 apt update -y
-apt install -y locales
+DEBIAN_FRONTEND=noninteractive \
+    apt install -y locales
 
 echo "$TIMEZONE" > /etc/timezone && \
     dpkg-reconfigure -f noninteractive tzdata && \
@@ -43,26 +44,36 @@ echo "$TIMEZONE" > /etc/timezone && \
     dpkg-reconfigure -f noninteractive locales && \
     update-locale LANG=en_US.UTF-8
 
+LANG=en_US.UTF-8
+
+rm /etc/localtime
+ln -s /usr/share/zoneinfo/Asia/Tokyo /etc/localtime
+
 echo "brain" > /etc/hostname
 DEBIAN_FRONTEND=noninteractive \
     apt install -y dialog sudo \
                    libjpeg-dev libfreetype6 libfreetype6-dev zlib1g-dev \
                    xserver-xorg xserver-xorg-video-fbdev xserver-xorg-dev xserver-xorg-input-evdev xinput-calibrator xorg-dev x11-apps xinit \
-                   openbox obconf obmenu jwm \
+                   jwm \
                    weston xwayland \
                    bash tmux vim htop \
                    midori pcmanfm lxterminal xterm gnome-terminal fbterm uim-fep uim-anthy fonts-noto-cjk \
-                   dbus udev alsa-utils usbutils iw \
+                   dbus udev alsa-utils usbutils iw fake-hwclock\
                    build-essential flex bison pkg-config autotools-dev libtool autoconf automake device-tree-compiler \
                    python3 python3-dev python3-setuptools python3-wheel python3-pip python3-smbus \
                    resolvconf net-tools ssh openssh-client avahi-daemon curl wget git
 
+DEBIAN_FRONTEND=noninteractive \
+    apt install -y --install-recommends fcitx-anthy
+
+systemctl enable fake-hwclock
+
 # Ly
-apt install -y libpam0g-dev libxcb-xkb-dev
+DEBIAN_FRONTEND=noninteractive \
+    apt install -y libpam0g-dev libxcb-xkb-dev
 cd /
-git clone https://github.com/nullgemm/ly.git
+git clone --recurse-submodules https://github.com/nullgemm/ly.git
 cd ly
-make github
 make
 make install
 cd /
@@ -92,15 +103,16 @@ usermod -a -G video user
 # Allow root login via UART
 cat <<EOF >> /etc/securetty
 ttymxc0
+ttyLP0
 EOF
 
 # Get wild
 cat <<EOF > /etc/apt/sources.list
-deb http://deb.debian.org/debian buster main contrib non-free
-deb-src http://deb.debian.org/debian buster main contrib non-free
-deb http://deb.debian.org/debian buster-updates main contrib non-free
-deb-src http://deb.debian.org/debian buster-updates main contrib non-free
-deb http://deb.debian.org/debian-security buster/updates main contrib non-free
-deb-src http://deb.debian.org/debian-security buster/updates main contrib non-free
+deb http://deb.debian.org/debian bullseye main contrib non-free
+deb-src http://deb.debian.org/debian bullseye main contrib non-free
+deb http://deb.debian.org/debian bullseye-updates main contrib non-free
+deb-src http://deb.debian.org/debian bullseye-updates main contrib non-free
+deb http://deb.debian.org/debian-security bullseye-security/updates main contrib non-free
+deb-src http://deb.debian.org/debian-security bullseye-security/updates main contrib non-free
 EOF
 

tools/getcross

@@ -0,0 +1,36 @@
+#!/bin/sh
+set -e
+
+uboot() {
+    . ./u-boot-brain/.config
+    case "${CONFIG_SYS_CPU}" in
+        arm926ejs) echo -n "arm-linux-gnueabi-"; return;;
+        armv7) echo -n "arm-linux-gnueabihf-"; return;;
+        *) exit 1;;
+    esac
+}
+
+linux() {
+    . ./linux-brain/.config
+    case "${CONFIG_CPU_ARM926T}_${CONFIG_ARCH_MULTI_V7}" in
+        y_) echo -n "arm-linux-gnueabi-"; return;;
+        _y) echo -n "arm-linux-gnueabihf-"; return;;
+        *) exit 1;;
+    esac
+}
+
+rootfs() {
+    . ./linux-brain/.config
+    case "${CONFIG_CPU_ARM926T}_${CONFIG_ARCH_MULTI_V7}" in
+        y_) echo -n "armel"; return;;
+        _y) echo -n "armhf"; return;;
+        *) exit 1;;
+    esac
+}
+
+case "$1" in
+    u-boot) uboot ;;
+    linux) linux ;;
+    rootfs) rootfs ;;
+    *) exit 1; ;;
+esac