build/linux/sysroot_ld_path.sh

   1 #!/bin/sh
   2 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
   3 # Use of this source code is governed by a BSD-style license that can be
   4 # found in the LICENSE file.
   5
   6 # Reads etc/ld.so.conf and/or etc/ld.so.conf.d/*.conf and returns the
   7 # appropriate linker flags.
   8 #
   9 #  sysroot_ld_path.sh /abspath/to/sysroot
  10 #
  11
  12 log_error_and_exit() {
  13   echo $0: $@
  14   exit 1
  15 }
  16
  17 process_entry() {
  18   if [ -z "$1" ] || [ -z "$2" ]; then
  19     log_error_and_exit "bad arguments to process_entry()"
  20   fi
  21   local root="$1"
  22   local localpath="$2"
  23
  24   echo $localpath | grep -qs '^/'
  25   if [ $? -ne 0 ]; then
  26     log_error_and_exit $localpath does not start with /
  27   fi
  28   local entry="$root$localpath"
  29   echo -L$entry
  30   echo -Wl,-rpath-link=$entry
  31 }
  32
  33 process_ld_so_conf() {
  34   if [ -z "$1" ] || [ -z "$2" ]; then
  35     log_error_and_exit "bad arguments to process_ld_so_conf()"
  36   fi
  37   local root="$1"
  38   local ld_so_conf="$2"
  39
  40   # ld.so.conf may include relative include paths. pushd is a bashism.
  41   local saved_pwd=$(pwd)
  42   cd $(dirname "$ld_so_conf")
  43
  44   cat "$ld_so_conf" | \
  45     while read ENTRY; do
  46       echo "$ENTRY" | grep -qs ^include
  47       if [ $? -eq 0 ]; then
  48         local included_files=$(echo "$ENTRY" | sed 's/^include //')
  49         for inc_file in $included_files; do
  50           echo $inc_file | grep -qs ^/
  51           if [ $? -eq 0 ]; then
  52             process_ld_so_conf "$root" "$root$inc_file"
  53           else
  54             process_ld_so_conf "$root" "$(pwd)/$inc_file"
  55           fi
  56         done
  57         continue
  58       fi
  59
  60       echo "$ENTRY" | grep -qs ^/
  61       if [ $? -eq 0 ]; then
  62         process_entry "$root" "$ENTRY"
  63       fi
  64     done
  65
  66   # popd is a bashism
  67   cd "$saved_pwd"
  68 }
  69
  70 # Main
  71
  72 if [ $# -ne 1 ]; then
  73   echo Usage $0 /abspath/to/sysroot
  74   exit 1
  75 fi
  76
  77 echo $1 | grep -qs ' '
  78 if [ $? -eq 0 ]; then
  79   log_error_and_exit $1 contains whitespace.
  80 fi
  81
  82 LD_SO_CONF="$1/etc/ld.so.conf"
  83 LD_SO_CONF_D="$1/etc/ld.so.conf.d"
  84
  85 if [ -e "$LD_SO_CONF" ]; then
  86   process_ld_so_conf "$1" "$LD_SO_CONF" | xargs echo
  87 elif [ -e "$LD_SO_CONF_D" ]; then
  88   find "$LD_SO_CONF_D" -maxdepth 1 -name '*.conf' -print -quit > /dev/null
  89   if [ $? -eq 0 ]; then
  90     for entry in $LD_SO_CONF_D/*.conf; do
  91       process_ld_so_conf "$1" "$entry"
  92     done | xargs echo
  93   fi
  94 fi