message: depends: allow for CONFIG_SITE to be used rather than stealing prefix
  This does not break any existing prefix behavior, only makes new behavior work.
  For example:
  CONFIG_SITE=$PWD/depends/x86_64-pc-linux-gnu/share/config.site ./configure --prefix=/
diff: +depends_prefix="`dirname ${ac_site_file}`/.."
  +
  cross_compiling=maybe
  host_alias=@HOST@
  ac_tool_prefix=${host_alias}-
  if test -z $with_boost; then
  - with_boost=$prefix
  + with_boost=$depends_prefix
  fi
  if test -z $with_qt_plugindir; then
  - with_qt_plugindir=$prefix/plugins
  + with_qt_plugindir=$depends_prefix/plugins
  fi
  if test -z $with_qt_translationdir; then
  - with_qt_translationdir=$prefix/translations
  + with_qt_translationdir=$depends_prefix/translations
  fi
  if test -z $with_qt_bindir; then
  - with_qt_bindir=$prefix/native/bin
  + with_qt_bindir=$depends_prefix/native/bin
  fi
  if test -z $with_protoc_bindir; then
  - with_protoc_bindir=$prefix/native/bin
  + with_protoc_bindir=$depends_prefix/native/bin
  fi
  if test -z $with_comparison_tool; then
  - with_comparison_tool=$prefix/native/share/BitcoindComparisonTool_jar/BitcoindComparisonTool.jar
  + with_comparison_tool=$depends_prefix/native/share/BitcoindComparisonTool_jar/BitcoindComparisonTool.jar
  fi
  @@ -41,31 +43,32 @@ fi
  if test x@host_os@ = xmingw32; then
  if test -z $with_qt_incdir; then
  - with_qt_incdir=$prefix/include
  + with_qt_incdir=$depends_prefix/include
  fi
  if test -z $with_qt_libdir; then
  - with_qt_libdir=$prefix/lib
  + with_qt_libdir=$depends_prefix/lib
  fi
  fi
  -PATH=$prefix/native/bin:$PATH
  +PATH=$depends_prefix/native/bin:$PATH
  PKG_CONFIG="`which pkg-config` --static"
  # These two need to remain exported because pkg-config does not see them
  # otherwise. That means they must be unexported at the end of configure.ac to
  # avoid ruining the cache. Sigh.
  -export PKG_CONFIG_LIBDIR=$prefix/lib/pkgconfig
  -export PKG_CONFIG_PATH=$prefix/share/pkgconfig
  +export PKG_CONFIG_LIBDIR=$depends_prefix/lib/pkgconfig
  +export PKG_CONFIG_PATH=$depends_prefix/share/pkgconfig
  -CPPFLAGS="-I$prefix/include/ $CPPFLAGS"
  -LDFLAGS="-L$prefix/lib $LDFLAGS"
  +CPPFLAGS="-I$depends_prefix/include/ $CPPFLAGS"
  +LDFLAGS="-L$depends_prefix/lib $LDFLAGS"
  CC="@CC@"
  CXX="@CXX@"
  OBJC="${CC}"
  OBJCXX="${CXX}"
  -CCACHE=$prefix/native/bin/ccache
  +CCACHE=$depends_prefix/native/bin/ccache
  +PYTHONPATH=$depends_prefix/native/lib/python/dist-packages:$PYTHONPATH
  if test -n "@AR@"; then
  AR=@AR@
  