Add linux-mipsel dockcross target

linux-mipsel/Dockerfile

@@ -0,0 +1,45 @@
+FROM dockcross/base:latest
+MAINTAINER Sergi Alvarez "pancake@nopcode.org"
+
+# This is for ARMv5 "legacy" (mipsel) devices which do NOT support hard float
+# VFP instructions (mipshf).
+
+# From https://wiki.debian.org/CrossToolchains, installing for jessie
+RUN echo "deb http://emdebian.org/tools/debian/ jessie main" > /etc/apt/sources.list.d/emdebian.list \
+&& curl http://emdebian.org/tools/debian/emdebian-toolchain-archive.key | apt-key add - \
+&& sed -i 's/httpredir.debian.org/http.debian.net/' /etc/apt/sources.list \
+&& dpkg --add-architecture mipsel \
+&& apt-get update && apt-get install -y crossbuild-essential-mipsel
+
+# The cross-compiling emulator
+RUN apt-get update && apt-get install -y \
+  qemu-user \
+  qemu-user-static
+
+ENV CROSS_TRIPLE mips-linux-gnueabi
+ENV CROSS_ROOT /usr/bin
+ENV AS=/usr/bin/${CROSS_TRIPLE}-as \
+    AR=/usr/bin/${CROSS_TRIPLE}-ar \
+    CC=/usr/bin/${CROSS_TRIPLE}-gcc \
+    CPP=/usr/bin/${CROSS_TRIPLE}-cpp \
+    CXX=/usr/bin/${CROSS_TRIPLE}-g++ \
+    LD=/usr/bin/${CROSS_TRIPLE}-ld
+
+ENV QEMU_LD_PREFIX ${CROSS_ROOT}/libc
+ENV QEMU_SET_ENV "LD_LIBRARY_PATH=${CROSS_ROOT}/lib:${CROSS_ROOT}/libc/lib/${CROSS_TRIPLE}/"
+
+ENV DEFAULT_DOCKCROSS_IMAGE dockcross/linux-mipsel
+
+COPY Toolchain.cmake ${CROSS_ROOT}/
+ENV CMAKE_TOOLCHAIN_FILE ${CROSS_ROOT}/Toolchain.cmake
+
+# Build-time metadata as defined at http://label-schema.org
+ARG BUILD_DATE
+ARG IMAGE
+ARG VCS_REF
+ARG VCS_URL
+LABEL org.label-schema.build-date=$BUILD_DATE \
+      org.label-schema.name=$IMAGE \
+      org.label-schema.vcs-ref=$VCS_REF \
+      org.label-schema.vcs-url=$VCS_URL \
+      org.label-schema.schema-version="1.0"