classes/relocatable.bbclass

   1 SYSROOT_PREPROCESS_FUNCS += "relocatable_binaries_preprocess"
   2
   3 CHRPATH_BIN ?= "chrpath"
   4 PREPROCESS_RELOCATE_DIRS ?= ""
   5
   6 def process_dir (directory, d):
   7     import subprocess as sub
   8     import stat
   9
  10     cmd = bb.data.expand('${CHRPATH_BIN}', d)
  11     tmpdir = bb.data.getVar('TMPDIR', d)
  12     basedir = bb.data.expand('${base_prefix}', d)
  13
  14     #bb.debug("Checking %s for binaries to process" % directory)
  15     if not os.path.exists(directory):
  16         return
  17
  18     dirs = os.listdir(directory)
  19     for file in dirs:
  20         fpath = directory + "/" + file
  21         if os.path.islink(fpath):
  22             # Skip symlinks
  23             continue
  24
  25         if os.path.isdir(fpath):
  26             process_dir(fpath, d)
  27         else:
  28             #bb.note("Testing %s for relocatability" % fpath)
  29
  30             # We need read and write permissions for chrpath, if we don't have
  31             # them then set them temporarily. Take a copy of the files
  32             # permissions so that we can restore them afterwards.
  33             perms = os.stat(fpath)[stat.ST_MODE]
  34             if os.access(fpath, os.W_OK|os.R_OK):
  35                     perms = None
  36             else:
  37                 # Temporarily make the file writeable so we can chrpath it
  38                 os.chmod(fpath, perms|stat.S_IRWXU)
  39
  40             p = sub.Popen([cmd, '-l', fpath],stdout=sub.PIPE,stderr=sub.PIPE)
  41             err, out = p.communicate()
  42             # If returned succesfully, process stderr for results
  43             if p.returncode != 0:
  44                 continue
  45
  46             # Throw away everything other than the rpath list
  47             curr_rpath = err.partition("RPATH=")[2]
  48             #bb.note("Current rpath for %s is %s" % (fpath, curr_rpath.strip()))
  49             rpaths = curr_rpath.split(":")
  50             new_rpaths = []
  51             for rpath in rpaths:
  52                 # If rpath is already dynamic continue
  53                 if rpath.find("$ORIGIN") != -1:
  54                     continue
  55                 # If the rpath shares a root with base_prefix determine a new dynamic rpath from the
  56                 # base_prefix shared root
  57                 if rpath.find(basedir) != -1:
  58                     depth = fpath.partition(basedir)[2].count('/')
  59                     libpath = rpath.partition(basedir)[2].strip()
  60                 # otherwise (i.e. cross packages) determine a shared root based on the TMPDIR
  61                 # NOTE: This will not work reliably for cross packages, particularly in the case
  62                 # where your TMPDIR is a short path (i.e. /usr/poky) as chrpath cannot insert an
  63                 # rpath longer than that which is already set.
  64                 else:
  65                     depth = fpath.rpartition(tmpdir)[2].count('/')
  66                     libpath = rpath.partition(tmpdir)[2].strip()
  67
  68                 base = "$ORIGIN"
  69                 while depth > 1:
  70                     base += "/.."
  71                     depth-=1
  72                 new_rpaths.append("%s%s" % (base, libpath))
  73
  74             # if we have modified some rpaths call chrpath to update the binary
  75             if len(new_rpaths):
  76                 args = ":".join(new_rpaths)
  77                 #bb.note("Setting rpath for %s to %s" %(fpath,args))
  78                 sub.call([cmd, '-r', args, fpath])
  79
  80             if perms:
  81                 os.chmod(fpath, perms)
  82
  83 def rpath_replace (path, d):
  84     bindirs = bb.data.expand("${bindir} ${sbindir} ${base_sbindir} ${base_bindir} ${libdir} ${base_libdir} ${PREPROCESS_RELOCATE_DIRS}", d).split()
  85
  86     for bindir in bindirs:
  87         #bb.note ("Processing directory " + bindir)
  88         directory = path + "/" + bindir
  89         process_dir (directory, d)
  90
  91 python relocatable_binaries_preprocess() {
  92     rpath_replace(bb.data.expand('${SYSROOT_DESTDIR}', d), d)
  93 }