Add rpi2 image and move armv6

linux-armv7-rpi2/Dockerfile.in

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+FROM dockcross/base:latest
+MAINTAINER Matt McCormick "matt.mccormick@kitware.com"
+
+# This is for 32-bit ARMv7 Linux
+#include "common.crosstool"
+
+# The cross-compiling emulator
+RUN apt-get update \
+&& apt-get install -y \
+  qemu-user \
+  qemu-user-static \
+&& apt-get clean --yes
+
+
+# The CROSS_TRIPLE is a configured alias of the "armv7-rpi2-linux-gnueabihf" target.
+ENV CROSS_TRIPLE armv7-rpi2-linux-gnueabihf
+ENV CROSS_ROOT ${XCC_PREFIX}/${CROSS_TRIPLE}
+ENV AS=${CROSS_ROOT}/bin/${CROSS_TRIPLE}-as \
+    AR=${CROSS_ROOT}/bin/${CROSS_TRIPLE}-ar \
+    CC=${CROSS_ROOT}/bin/${CROSS_TRIPLE}-gcc \
+    CPP=${CROSS_ROOT}/bin/${CROSS_TRIPLE}-cpp \
+    CXX=${CROSS_ROOT}/bin/${CROSS_TRIPLE}-g++ \
+    LD=${CROSS_ROOT}/bin/${CROSS_TRIPLE}-ld \
+    FC=${CROSS_ROOT}/bin/${CROSS_TRIPLE}-gfortran
+
+ENV QEMU_LD_PREFIX "${CROSS_ROOT}/${CROSS_TRIPLE}/sysroot"
+ENV QEMU_SET_ENV "LD_LIBRARY_PATH=${CROSS_ROOT}/lib:${QEMU_LD_PREFIX}"
+
+COPY Toolchain.cmake ${CROSS_ROOT}/
+ENV CMAKE_TOOLCHAIN_FILE ${CROSS_ROOT}/Toolchain.cmake
+
+ENV PKG_CONFIG_PATH /usr/lib/armv7-rpi2-linux-gnueabihf/
+
+# Linux kernel cross compilation variables
+ENV PATH ${PATH}:${CROSS_ROOT}/bin
+ENV CROSS_COMPILE ${CROSS_TRIPLE}-
+ENV ARCH arm
+
+#include "common.lib"
+
+#include "common.label-and-env"

linux-armv7-rpi2/Toolchain.cmake

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+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_VERSION 1)
+set(CMAKE_SYSTEM_PROCESSOR arm)
+set(cross_triple "armv7-rpi2-linux-gnueabihf")
+set(cross_root /usr/xcc/${cross_triple})
+
+set(CMAKE_C_COMPILER $ENV{CC})
+set(CMAKE_CXX_COMPILER $ENV{CXX})
+set(CMAKE_Fortran_COMPILER $ENV{FC})
+
+set(CMAKE_CXX_FLAGS "-I ${cross_root}/include/")
+
+set(CMAKE_FIND_ROOT_PATH ${cross_root} ${cross_root}/${cross_triple})
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY BOTH)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE BOTH)
+set(CMAKE_SYSROOT ${cross_root}/${cross_triple}/sysroot)
+
+set(CMAKE_CROSSCOMPILING_EMULATOR /usr/bin/qemu-arm)
+