Make RT buildable again on Mac OS X. Courtesy of mattintosh4, issue 1628

rtdata/osx/executable_loader.in

@@ -0,0 +1,34 @@
+#!/bin/bash 
+
+cwd="$(cd "$(dirname "$0")"; pwd)"
+app="${cwd%/Contents/*}"
+etc="${cwd}"/etc
+
+#export DYLD_LIBRARY_PATH="${cwd}"/lib
+export GTK_PATH="${cwd}"
+export GTK_EXE_PREFIX="${cwd}"
+export GTK_DATA_PREFIX="${cwd}"
+export GTK_DATA_DIRS="${cwd}"
+export XDG_DATA_DIRS="${cwd}"/share
+export GTK2_RC_FILES="${etc}"/gtk-2.0/gtkrc
+export GTK_IM_MODULE_FILE="${etc}"/gtk-2.0/gtk.immodules
+export GDK_PIXBUF_MODULE_FILE="${etc}"/gtk-2.0/gdk-pixbuf.loaders
+export PANGO_RC_FILE="${etc}"/pango/pangorc
+
+# environment variables for X11 backend
+if test -d "${etc}"/fonts; then
+  export FONTCONFIG_PATH="${etc}"/fonts
+  
+  _DYLD_LIBRARY_PATH="$DYLD_LIBRARY_PATH"
+  DYLD_LIBRARY_PATH=/tmp/`uuidgen`
+  mkdir $DYLD_LIBRARY_PATH
+  cp /usr/lib/libcups.2.dylib $DYLD_LIBRARY_PATH
+  export DYLD_LIBRARY_PATH="$DYLD_LIBRARY_PATH:$_DYLD_LIBRARY_PATH"
+fi
+
+# strip out system arguments
+case "$1" in -psn_*) shift;; esac
+
+ln -sf "${app}" /tmp
+
+exec "${cwd}"/rawtherapee-bin "$@"