bootstrap

   1 #! /bin/sh -
   2 #
   3 # Builder of custom stages (cross compilers, GNU/Linux distributions)
   4 #
   5 # Copyright (c) 2014-2017 Matias Fonzo, <selk@dragora.org>.
   6 #
   7 # Licensed under the Apache License, Version 2.0 (the "License");
   8 # you may not use this file except in compliance with the License.
   9 # You may obtain a copy of the License at
  10 #
  11 #    http://www.apache.org/licenses/LICENSE-2.0
  12 #
  13 # Unless required by applicable law or agreed to in writing, software
  14 # distributed under the License is distributed on an "AS IS" BASIS,
  15 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16 # See the License for the specific language governing permissions and
  17 # limitations under the License.
  18
  19 # EXIT STATUS
  20 # 0  = Successful completion
  21 # 1  = Minor common errors (e.g: help usage, support not available)
  22 # 2  = Command execution error
  23 # 3  = Integrity check error for compressed files
  24
  25 PROGRAM="${0##*/}"
  26
  27 # Override locale settings
  28 LC_ALL=C
  29 LANGUAGE=C
  30 export LC_ALL LANGUAGE
  31
  32 # Get physical working directory, absolute path name
  33 CWD=$(CDPATH= cd -P -- $(dirname -- "$0") && printf "$PWD")
  34
  35 #### Functions
  36
  37 usage() {
  38     printf "%s\n" \
  39      "Builder of custom stages (cross compilers, GNU/Linux distributions)"  \
  40      ""                                                                     \
  41      "Usage: $PROGRAM [OPTION]... [FILE]..."                                \
  42      ""                                                                     \
  43      "Defaults for the options are specified in brackets."                  \
  44      ""                                                                     \
  45      "Options:"                                                             \
  46      "  -h          display this help and exit"                             \
  47      "  -V          print version information and exit"                     \
  48      "  -a          target architecture [${arch}]"                          \
  49      "  -j          parallel jobs for the compiler [${jobs}]"               \
  50      "  -k          keep (don't delete) source directory"                   \
  51      "  -o          output directory [${output}]"                           \
  52      "  -s          stage number to build [${stage}]"                       \
  53      ""                                                                     \
  54      "Some influential environment variables:"                              \
  55      "  TMPDIR      temporary directory for sources [${TMPDIR}]"            \
  56      "  BTCC        C compiler command [${BTCC}]"                           \
  57      "  BTCXX       C++ compiler command [${BTCXX}]"                        \
  58      "  BTCFLAGS    C compiler flags [${BTCFLAGS}]"                         \
  59      "  BTCXXFLAGS  C++ compiler flags [${BTCXXFLAGS}]"                     \
  60      "  BTLDFLAGS   linker flags [${BTLDFLAGS}]"                            \
  61      "  VENDOR      vendor name to reflect on the target triplet"           \
  62      ""                                                                     \
  63      "Supported architectures (targets):"
  64      for arch in "${CWD}/targets"/*
  65      do
  66          printf "${arch##*/} "
  67      done
  68     echo
  69 }
  70
  71 version()
  72 {
  73     printf "%s\n" \
  74      "$PROGRAM 3.16" \
  75      "Copyright (C) 2014-2017 Matias Andres Fonzo." \
  76      "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>" \
  77      "This is free software: you are free to change and redistribute it." \
  78      "There is NO WARRANTY, to the extent permitted by law."
  79 }
  80
  81 warn()
  82 {
  83     echo "$@" 1>&2
  84 }
  85
  86 chkstatus_or_exit()
  87 {
  88     status=$?
  89
  90     if test $status -ne 0
  91     then
  92         echo "Return status = $status" 1>&2
  93         exit ${1-2};    # If not given, defaults to 2
  94     fi
  95
  96     unset status
  97 }
  98
  99 # Function to test and extract tarball files
 100 untar() {
 101     tar tf "$1" > /dev/null && {
 102         cd -- "$2" && tar xpf "$1"
 103     }
 104     chkstatus_or_exit 3
 105 }
 106
 107 #### Warning for good practices
 108
 109 # Recommended practices is to set variables in front of `configure',
 110 # or make(1), see also:
 111 #
 112 # http://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.69/html_node/Defining-Variables.html
 113 # http://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.69/html_node/Setting-Output-Variables.html
 114 # http://www.gnu.org/software/make/manual/make.html#Environment
 115
 116 warn_flags()
 117 {
 118     warn "WARNING: Environment variable '$1' is set."   \
 119          "This will be unset to avoid possible risks."  \
 120          ""
 121 }
 122
 123 #### Default values
 124
 125 BTCC="${BTCC:=cc}"
 126 BTCXX="${BTCXX:=c++}"
 127 BTCFLAGS="${BTCFLAGS:=-g0 -Os}"
 128 BTCXXFLAGS="${BTCXXFLAGS:=$BTCFLAGS}"
 129 BTLDFLAGS="${BTLDFLAGS:=-s}"
 130 worktree="$CWD"
 131 arch="$(uname -m)" || chkstatus_or_exit
 132 jobs=1
 133 opt_keep=opt_keep.off
 134 output=${worktree}/OUTPUT.${PROGRAM}
 135 TMPDIR="${TMPDIR:=${output}/sources}"
 136 stage=0
 137
 138 # Compose vendor name adding "-" as suffix
 139 test -n "$VENDOR" && VENDOR="${VENDOR}-"
 140
 141 #### Parse options
 142
 143 while getopts :ha:j:ko:s:V name
 144 do
 145     case $name in
 146     h)
 147         usage
 148         exit 0
 149         ;;
 150     a)
 151         arch="$OPTARG"
 152         ;;
 153     j)
 154         jobs="$OPTARG"
 155         ;;
 156     k)
 157         opt_keep=opt_keep
 158         ;;
 159     o)
 160         output="$OPTARG"
 161         ;;
 162     s)
 163         stage="$OPTARG"
 164         ;;
 165     V)
 166         version
 167         exit 0
 168         ;;
 169     :)
 170         warn "Option '-${OPTARG}' requires an argument"
 171         usage
 172         exit 1
 173         ;;
 174     \?)
 175         warn "Illegal option -- '-${OPTARG}'"
 176         usage
 177         exit 1
 178         ;;
 179     esac
 180 done
 181 shift $(( OPTIND - 1 ))
 182
 183 # Check for environment variables, print warning, unset in any case
 184 test "${CC:+CC_defined}" = CC_defined && warn_flags CC
 185 test "${CXX:+CXX_defined}" = CXX_defined && warn_flags CXX
 186 test "${CFLAGS:+CFLAGS_defined}" = CFLAGS_defined && warn_flags CFLAGS
 187 test "${CXXFLAGS:+CXXFLAGS_defined}" = CXXFLAGS_defined && warn_flags CXXFLAGS
 188 test "${LDFLAGS:+LDFLAGS_defined}" = LDFLAGS_defined && warn_flags LDFLAGS
 189
 190 unset CC CXX CFLAGS CXXFLAGS LDFLAGS warn_flags
 191
 192 # Avoid exportation of 'libSuffix' when a target is loaded
 193 libSuffix=""
 194
 195 # Load target architecture-file
 196
 197 if test -f "${worktree}/targets/$arch"
 198 then
 199     echo "${PROGRAM}: Loading target $arch ..."
 200     . "${worktree}/targets/$arch"
 201 else
 202     warn \
 203      "${PROGRAM}: Target name not recognized -- '${arch}'" \
 204      "See '$0 -h' for more information"
 205     exit 1
 206 fi
 207
 208 # Determine the host to use.
 209
 210 # Set up the host if a C compiler command was exported,
 211 # otherwise, a local `cc' will be used instead
 212
 213 if test -n "$BTCC"
 214 then
 215     host="$(${BTCC} -dumpmachine)" || chkstatus_or_exit
 216 else
 217     host="$(cc -dumpmachine)" || chkstatus_or_exit
 218 fi
 219
 220 # If the host and the target are the same triplet, it won't work.
 221 # We are changing the host if it is really needed
 222
 223 if test "$host" = "$target"
 224 then
 225     # Rename VENDOR to 'cross'.  If empty, 'cross-linux' is added
 226     case "${host%-*-*}" in
 227     *-*)
 228         host="$(echo "$host" | sed -e 's/-[^-]*/-cross/')"
 229         ;;
 230     *)
 231         host="$(echo "$host" | sed -e 's/-[^-]*/-cross-linux/')"
 232         ;;
 233     esac
 234 fi
 235
 236 # Compose variables for the physical output,
 237 # print some useful information
 238
 239 crossdir=${output}/cross/${target}
 240 rootdir=${output}/stage${stage}
 241
 242 printf "%s\n" \
 243  "BTCC: $BTCC"                  \
 244  "BTCXX: $BTCXX"                \
 245  "BTCFLAGS: $BTCFLAGS"          \
 246  "BTCXXFLAGS: $BTCXXFLAGS"      \
 247  "BTLDFLAGS: $BTLDFLAGS"        \
 248  "Host: $host"                  \
 249  "Target: $target"              \
 250  "Output directory: $output"    \
 251  "Cross  directory: $crossdir"  \
 252  "Root   directory: $rootdir"
 253
 254 # Remove write permission for group and other
 255 umask 022
 256
 257 # Create required directories
 258 if test ! -d "$output"
 259 then
 260     mkdir -p -- "$output" || chkstatus_or_exit
 261 fi
 262 if test ! -d "$TMPDIR"
 263 then
 264     mkdir -p -- "$TMPDIR" || chkstatus_or_exit
 265 fi
 266
 267 # Set default path and propagate variables
 268
 269 PATH="${crossdir}/bin:${PATH}"
 270 export PATH VENDOR TMPDIR
 271
 272 # Main loop
 273 for file in "${CWD}/stages/${stage}"/${@:-??-*}
 274 do
 275     file="${file##*/}"
 276
 277     if test ! -f "${CWD}/stages/${stage}/$file"
 278     then
 279         warn "${PROGRAM}: ${stage}/${file}: No such file or stage number"
 280         exit 1
 281     fi
 282     if test ! -x "${CWD}/stages/${stage}/$file"
 283     then
 284         warn "${PROGRAM}: ${stage}/${file}: File not executable, dodging"
 285         continue;
 286     fi
 287
 288     #### Stage pre-settings
 289
 290     # Create sysroot directory, recreating the symlink for the stage 0
 291
 292     if test "$stage" = 0
 293     then
 294         mkdir -p -- "${crossdir}/$target" || chkstatus_or_exit
 295
 296         if test ! -e "${crossdir}/${target}/usr"
 297         then
 298             ln -sf . "${crossdir}/${target}/usr" || chkstatus_or_exit
 299         fi
 300
 301         # Ensure toolchain sanity for multilib purposes
 302         case $arch in
 303         i586 | *x32 | x86_64 )
 304             if test ! -e "${crossdir}/lib" -a -n "$libSuffix"
 305             then
 306                 ln -sf lib${libSuffix} "${crossdir}/lib" || chkstatus_or_exit
 307             fi
 308             ;;
 309         esac
 310     fi
 311
 312     # Create "tools" directory, recreating the symlink for the stage 1
 313     if test "$stage" = 1
 314     then
 315         if test ! -d "${rootdir}/tools"
 316         then
 317             mkdir -p -- "${rootdir}/tools" || chkstatus_or_exit
 318         fi
 319
 320         # Make required symlink
 321         ln -sf "${rootdir}/tools" / || chkstatus_or_exit
 322     fi
 323
 324     #### Load the file containing the instruction
 325
 326     echo "${PROGRAM}: Processing $file from stage $stage ..."
 327
 328     # Set trap before to run the script in order to
 329     # catch the return status, exit code 2 if fails
 330
 331     trap 'chkstatus_or_exit 2' EXIT HUP INT QUIT ABRT TERM
 332
 333     # Exit immediately on any error
 334     set -e
 335
 336     . "${CWD}/stages/${stage}/$file"
 337
 338     # Deactivate shell option(s)
 339     set +e ; set +x
 340
 341     # Reset given signals
 342     trap - EXIT HUP INT QUIT ABRT TERM
 343
 344     # Delete declared directories on the cleanup() function
 345     if test "$opt_keep" != opt_keep
 346     then
 347         if type cleanup 1> /dev/null 2> /dev/null
 348         then
 349             cleanup || chkstatus_or_exit 2
 350             unset cleanup
 351         fi
 352     fi
 353
 354     # Back to the current working directory
 355     cd -- "$CWD" || chkstatus_or_exit
 356 done
 357