gistfile1.txt

#!/bin/bash

echo "activate, PATH=$PATH"
echo "activate, PWD=$PWD"

# The arguments to this are:
# 1. activation nature {activate,deactivate}
# 2. toolchain nature {build,host}
# 3. machine (should match -dumpmachine)
# 4. prefix (including the final -)
# 5+ program or environment var and value
# The format for 3+ is name{,,value}. If value is specified
#  then name taken to be an environment variable, otherwise
#  it is taken to be a program. In this case, which is used
#  to find the full filename during activation. The original
#  value is stored in environment variable CONDA_BACKUP_NAME
#  For deactivation, the distinction is irrelevant as in all
#  cases NAME simply gets reset to CONDA_BACKUP_NAME.  It is
#  a fatal error if a program is identified but not present.
function _tc_activation() {
  local act_nature=$1; shift
  local tc_nature=$1; shift
  local tc_machine=$1; shift
  local tc_prefix=$1; shift
  local thing
  local newval
  local from
  local to
  local which
  local pass

  if [ "${act_nature}" = "activate" ]; then
    from=""
    to="CONDA_BACKUP_"
    which=which
  else
    from="CONDA_BACKUP_"
    to=""
    which=true
  fi

  for pass in check apply; do
    for thing in $tc_nature,$tc_machine "$@"; do
      case "${thing}" in
        *,*)
          newval=$(echo "${thing}" | sed "s,^.*\,\(.*\),\1,")
          thing=$(echo "${thing}" | sed "s,^\(.*\)\,.*,\1,")
          ;;
        *)
          newval=$(${which} ${tc_prefix}${thing} 2>/dev/null)
          if [ -n "${which}" -a -z "${newval}" -a "${pass}" = "check" ]; then
            echo "ERROR: This toolchain package contains no program called ${tc_prefix}${thing}"
            return 1
          fi
          ;;
      esac
      if [ "${pass}" = "apply" ]; then
        thing=$(echo ${thing} | tr 'a-z+-' 'A-ZX_')
        eval oldval="${from}\$$thing"
        eval export "${to}'${thing}'=\"${oldval}\""
        if [ "${thing}" = "HOST" ]; then
          eval export "'${thing}=${host}'"
        elif [ "${thing}" = "BUILD" ]; then
          eval export "'${thing}=${build}'" 
        elif [ -n "${newval}" ]; then
          eval export "'${thing}=${newval}'"
        else
          eval unset '${thing}'
        fi
      fi
    done
  done
}

env > /tmp/old-env-$$.txt
_tc_activation \
  activate \
  host \
  arm-unknown-linux-uclibcgnueabi \
  arm-unknown-linux-uclibcgnueabi- \
  addr2line ar as c++ cc c++filt cpp elfedit g++ gcc c++ gcov gcov-tool gfortran gprof ld ldd nm objcopy objdump ranlib readelf size strings strip \
  CFLAGS,"-test -test2 -\"test3 with spaces\"" \
  CXXFLAGS,"-test -test2 -test3"
if [ $? -ne 0 ]; then
  echo "Failure detected"
else
  env > /tmp/new-env-$$.txt
  echo "Activating '${HOST}' cross-compiler made the following environmental changes:"
  diff -u0rN /tmp/old-env-$$.txt /tmp/new-env-$$.txt | tail -n +4 | grep "^-.*\|^+.*" | sort
fi