Switch to crosstool-ng

Fixes #2.

.dockerignore

@@ -0,0 +1,9 @@
+/.idea
+/.config
+/.config.old
+/build
+/result
+/build.log
+/crosstool-ng*
+/*.tar.xz
+/*.tar.xz.asc

.gitignore

@@ -1,2 +1,9 @@
-/_build
 /.idea
+/.config
+/.config.old
+/build
+/result
+/build.log
+/crosstool-ng*
+/*.tar.xz
+/*.tar.xz.asc

Dockerfile

@@ -0,0 +1,28 @@
+FROM ubuntu:eoan
+
+ARG CTVER=1.24.0
+ARG UID=1000
+ARG GID=1000
+ARG USER=toolchain
+ARG GROUP=toolchain
+
+RUN apt-get update
+RUN apt-get install -y gcc g++ gperf bison flex texinfo help2man make libncurses5-dev \
+    python3-dev autoconf automake libtool libtool-bin gawk wget bzip2 xz-utils unzip \
+    patch libstdc++6 rsync wget git
+
+RUN wget http://crosstool-ng.org/download/crosstool-ng/crosstool-ng-$CTVER.tar.xz && \
+    tar xf crosstool-ng-$CTVER.tar.xz && \
+    cd crosstool-ng-$CTVER && \
+    ./configure && \
+    make && make install
+
+RUN groupadd -g $GID $GROUP
+RUN useradd -ms /bin/bash -u $UID -g $GID $USER
+
+USER $USER
+RUN mkdir -p /home/$USER/rpi-toolchain
+WORKDIR /home/$USER/rpi-toolchain
+COPY --chown=toolchain:toolchain . .
+RUN make
+

Makefile

@@ -0,0 +1,57 @@
+TARGET:=arm-linux-gnueabihf
+VERSION:=$(shell git describe --always --dirty)
+NAME:=raspbian-$(VERSION)
+TOOLCHAIN:=toolchain-$(NAME)-x86_64-$(TARGET)
+SRC:=src-$(NAME)
+URL:=https://github.com/ali1234/rpi-toolchain/issues/new?body=Version:%20$(VERSION)
+
+export DEB_TARGET_MULTIARCH=$(TARGET)
+
+all: $(TOOLCHAIN).tar.xz.asc $(SRC).tar.xz.asc
+
+%.tar.xz.asc: %.tar.xz
+	sha256sum $< > $@
+
+.config: ct-ng-config
+	sed -E  -e 's|^(CT_TOOLCHAIN_PKGVERSION)=.*|\1=\"$(NAME)\"|' \
+	 		-e 's|^(CT_TOOLCHAIN_BUGURL)=.*|\1=\"$(NAME)\"|' ct-ng-config > .config
+
+result/success: .config
+	ct-ng build && touch result/success
+
+$(TOOLCHAIN).tar.xz: result/success
+	rm -rf --one-file-system result/$(TOOLCHAIN)
+	mkdir result/$(TOOLCHAIN)
+	rsync -av result/$(TARGET)/* result/$(TOOLCHAIN)
+	ct-ng --version > result/$(TOOLCHAIN)/ct-ng-version
+	cp .config result/$(TOOLCHAIN)/ct-ng-config
+	tar Jcf $(TOOLCHAIN).tar.xz --directory result $(TOOLCHAIN)
+
+$(SRC).tar.xz: result/success
+	ct-ng --version > src/ct-ng-version
+	cp .config src/ct-ng-config
+	tar Jcf $(SRC).tar.xz src
+
+saveconfig:
+	sed -E  -e 's|^(CT_TOOLCHAIN_PKGVERSION)=.*|\1=\"\"|' \
+	 		-e 's|^(CT_TOOLCHAIN_BUGURL)=.*|\1=\"\"|' .config > ct-ng-config
+
+menuconfig: .config
+	ct-ng menuconfig
+
+clean:
+	rm -rf build result build.log .config .config.old
+	rm -rf $(TOOLCHAIN).tar.xz $(TOOLCHAIN).tar.xz.asc $(SRC).tar.xz $(SRC).tar.xz.asc
+
+reallyclean: clean
+	rm -rf *.tar.xz *.tar.xz.asc
+
+indocker:
+	docker build -t rpi-toolchain .
+	docker create -ti --name rpi-toolchain-tmp rpi-toolchain
+	docker cp rpi-toolchain-tmp:/home/toolchain/rpi-toolchain/$(TOOLCHAIN).tar.xz .
+	docker cp rpi-toolchain-tmp:/home/toolchain/rpi-toolchain/$(TOOLCHAIN).tar.xz.asc .
+	docker cp rpi-toolchain-tmp:/home/toolchain/rpi-toolchain/$(SRC).tar.xz .
+	docker cp rpi-toolchain-tmp:/home/toolchain/rpi-toolchain/$(SRC).tar.xz.asc .
+	docker cp rpi-toolchain-tmp:/home/toolchain/rpi-toolchain/build.log .
+	docker rm -f rpi-toolchain-tmp

README.md

@@ -2,21 +2,11 @@
 
 A gcc cross toolchain for all Raspberry Pi models with multiarch support.
 
-Linaro toolchains are built using a tool called ABE. This is similar to
-crosstool-ng. After building it produces a manifest which can be used to
-reproduce the build.
+This toolchain is built with crosstool-ng. It includes the Debian specific
+patch for multiarch support in binutils.
 
-This toolchain is built by taking the Linaro release manifest and modifying
-the compiler configuration to produce armv6 compatible binaries which can
-run on all models of Raspberry Pi.
+To build it, clone the repository and run `make` or `make indocker` to
+run the build inside Docker. Check the Dockerfile to see the dependencies
+for a local build. To build from the release source, untar them inside
+the `src` directory.
 
-The changes required for this are very small. In the manifest, only the
-variables `gcc_stage1_flags` and `gcc_stage2_flags` are modified.
-
-The flags:
-
-    --with-fpu=vfpv3-d16 --with-mode=thumb --with-tune=cortex-a9 --with-arch=armv7-a
-
-are replaced by:
-
-    --with-fpu=vfp --with-arch=armv6