Add missing toolchain file.

anaconda-toolchain.cmake

+# this one is important
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_PLATFORM Linux)
+#this one not so much
+set(CMAKE_SYSTEM_VERSION 1)
+
+# specify the cross compiler
+set(CMAKE_C_COMPILER $ENV{CC})
+
+# where is the target environment
+set(CMAKE_FIND_ROOT_PATH $ENV{PREFIX} $ENV{BUILD_PREFIX}/$ENV{HOST}/sysroot)
+
+# search for programs in the build host directories
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+# for libraries and headers in the target directories
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+
+# god-awful hack because it seems to not run correct tests to determine this:
+set(__CHAR_UNSIGNED___EXITCODE 1)