make-emerge.sh

   1 #!/bin/sh -
   2 #@ Out-of-tree compilation support, à la
   3 #@    $ cd /tmp && mkdir build && cd build &&
   4 #@       ~/src/nail.git/make-emerge.sh && make tangerine DESTDIR=.ddir
   5 # Public Domain
   6
   7 # See make-config.sh, the source of all this!
   8
   9 ( set -o noglob ) >/dev/null 2>&1 && noglob_shell=1 || unset noglob_shell
  10
  11 config_exit() {
  12    exit ${1}
  13 }
  14
  15 msg() {
  16    fmt=${1}
  17    shift
  18    printf >&2 -- "${fmt}\\n" "${@}"
  19 }
  20
  21 # which(1) not standardized, command(1) -v may return non-executable: unroll!
  22 acmd_test() { __acmd "${1}" 1 0 0; }
  23 acmd_test_fail() { __acmd "${1}" 1 1 0; }
  24 acmd_set() { __acmd "${2}" 0 0 0 "${1}"; }
  25 acmd_set_fail() { __acmd "${2}" 0 1 0 "${1}"; }
  26 acmd_testandset() { __acmd "${2}" 1 0 0 "${1}"; }
  27 acmd_testandset_fail() { __acmd "${2}" 1 1 0 "${1}"; }
  28 thecmd_set() { __acmd "${2}" 0 0 1 "${1}"; }
  29 thecmd_set_fail() { __acmd "${2}" 0 1 1 "${1}"; }
  30 thecmd_testandset() { __acmd "${2}" 1 0 1 "${1}"; }
  31 thecmd_testandset_fail() { __acmd "${2}" 1 1 1 "${1}"; }
  32 __acmd() {
  33    pname=${1} dotest=${2} dofail=${3} verbok=${4} varname=${5}
  34
  35    if [ "${dotest}" -ne 0 ]; then
  36       eval dotest=\$${varname}
  37       if [ -n "${dotest}" ]; then
  38          [ -n "${VERBOSE}" ] && [ ${verbok} -ne 0 ] &&
  39             msg ' . ${%s} ... %s' "${pname}" "${dotest}"
  40          return 0
  41       fi
  42    fi
  43
  44    oifs=${IFS} IFS=:
  45    [ -n "${noglob_shell}" ] && set -o noglob
  46    set -- ${PATH}
  47    [ -n "${noglob_shell}" ] && set +o noglob
  48    IFS=${oifs}
  49    for path
  50    do
  51       if [ -z "${path}" ] || [ "${path}" = . ]; then
  52          if [ -d "${PWD}" ]; then
  53             path=${PWD}
  54          else
  55             path=.
  56          fi
  57       fi
  58       if [ -f "${path}/${pname}" ] && [ -x "${path}/${pname}" ]; then
  59          [ -n "${VERBOSE}" ] && [ ${verbok} -ne 0 ] &&
  60             msg ' . ${%s} ... %s' "${pname}" "${path}/${pname}"
  61          [ -n "${varname}" ] && eval ${varname}="${path}/${pname}"
  62          return 0
  63       fi
  64    done
  65
  66    # We may have no builtin string functions, we yet have no programs we can
  67    # use, try to access once from the root, assuming it is an absolute path if
  68    # that finds the executable
  69    if ( cd && [ -f "${pname}" ] && [ -x "${pname}" ] ); then
  70      [ -n "${VERBOSE}" ] && [ ${verbok} -ne 0 ] &&
  71             msg ' . ${%s} ... %s' "${pname}" "${pname}"
  72       [ -n "${varname}" ] && eval ${varname}="${pname}"
  73       return 0
  74    fi
  75
  76    [ ${dofail} -eq 0 ] && return 1
  77    msg 'ERROR: no trace of utility '"${pname}"
  78    exit 1
  79 }
  80
  81 syno() {
  82    if [ ${#} -gt 0 ]; then
  83       echo >&2 "ERROR: ${*}"
  84       echo >&2
  85    fi
  86    echo >&2 'Synopsis: SOURCEDIR/make-emerge.sh [from within target directory]'
  87    exit 1
  88 }
  89
  90 [ ${#} -eq 0 ] || syno
  91
  92 # Rude simple, we should test for Solaris, but who runs this script?
  93 if [ -d /usr/xpg4 ]; then
  94    PATH=/usr/xpg4/bin:${PATH}
  95 fi
  96
  97 thecmd_testandset_fail awk awk
  98 thecmd_testandset_fail cp cp
  99 thecmd_testandset_fail dirname dirname
 100 thecmd_testandset_fail pwd pwd
 101
 102 srcdir=`${dirname} ${0}`
 103 blddir=`${pwd}`
 104 if [ "${srcdir}" = . ]; then
 105    msg 'This is not out of tree?!'
 106    config_exit 1
 107 fi
 108 echo 'Initializing out-of-tree build.'
 109 echo 'Source directory: '"${srcdir}"
 110 echo 'Build directory : '"${blddir}"
 111 srcdir="${srcdir}"/
 112
 113 ${awk} -v srcdir="${srcdir}" -v blddir="${blddir}" '
 114    {
 115       gsub(/^SRCDIR=\.\/$/, "SRCDIR=" srcdir)
 116       print
 117    }
 118    ' < "${srcdir}"makefile > ./makefile
 119
 120 ${cp} "${srcdir}"config.h ./
 121 ${cp} "${srcdir}"gen-version.h ./
 122 ${cp} "${srcdir}"make.rc ./
 123
 124 echo 'You should now be able to proceed as normal (e.g., "$ make all")'
 125
 126 # s-sh-mode