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         if ls $included_files >/dev/null 2>&1 ; then
  50           for inc_file in $included_files; do
  51             echo $inc_file | grep -qs ^/
  52             if [ $? -eq 0 ]; then
  53               process_ld_so_conf "$root" "$root$inc_file"
  54             else
  55               process_ld_so_conf "$root" "$(pwd)/$inc_file"
  56             fi
  57           done
  58         fi
  59         continue
  60       fi
  61
  62       echo "$ENTRY" | grep -qs ^/
  63       if [ $? -eq 0 ]; then
  64         process_entry "$root" "$ENTRY"
  65       fi
  66     done
  67
  68   # popd is a bashism
  69   cd "$saved_pwd"
  70 }
  71
  72 # Main
  73
  74 if [ $# -ne 1 ]; then
  75   echo Usage $0 /abspath/to/sysroot
  76   exit 1
  77 fi
  78
  79 echo $1 | grep -qs ' '
  80 if [ $? -eq 0 ]; then
  81   log_error_and_exit $1 contains whitespace.
  82 fi
  83
  84 LD_SO_CONF="$1/etc/ld.so.conf"
  85 LD_SO_CONF_D="$1/etc/ld.so.conf.d"
  86
  87 if [ -e "$LD_SO_CONF" ]; then
  88   process_ld_so_conf "$1" "$LD_SO_CONF" | xargs echo
  89 elif [ -e "$LD_SO_CONF_D" ]; then
  90   find "$LD_SO_CONF_D" -maxdepth 1 -name '*.conf' -print -quit > /dev/null
  91   if [ $? -eq 0 ]; then
  92     for entry in $LD_SO_CONF_D/*.conf; do
  93       process_ld_so_conf "$1" "$entry"
  94     done | xargs echo
  95   fi
  96 fi