bootstrap

   1 #! /bin/sh -
   2 #
   3 # Builder of custom stages (cross compilers, GNU/Linux distributions)
   4 #
   5 # Copyright (c) 2014-2020 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="${0##*/}"
  26
  27 # Override locale settings
  28 LC_ALL=C
  29 LANGUAGE=C
  30 export LC_ALL LANGUAGE
  31
  32 # Get physical working directory (absolute path)
  33 CWD="$(CDPATH='' cd -P -- "$(dirname -- "$0")" && pwd -P)" || exit $?
  34
  35 ### Functions
  36
  37 usage()
  38 {
  39     printf '%s' \
  40 "Usage: $PROGRAM [OPTIONS] [FILE]...
  41 Builder of custom stages (cross compilers, GNU/Linux distributions).
  42
  43 Defaults for the options are specified in brackets.
  44
  45 Options:
  46   -a          Target architecture [${arch}]
  47   -j          Parallel jobs for the compiler [${jobs}]
  48   -k          Keep (don't delete) source directory
  49   -o          Output directory [${output}]
  50   -s          Stage number to build [${stage}]
  51   -h          Display this help and exit
  52   -V          Print version information and exit
  53
  54 Some influential environment variables:
  55   TMPDIR      Temporary directory for sources [${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 Targets from ${CWD}/targets/ ..."
  64 for name in "${CWD}/targets"/*
  65 do
  66     sed -e '2q;d' "$name"
  67 done
  68 unset -v name
  69 echo ""
  70 }
  71
  72 version()
  73 {
  74     printf '%s' \
  75 "$PROGRAM 3.25
  76 Copyright (C) 2014-2020 Matias Andres Fonzo.
  77 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
  78 This is free software: you are free to change and redistribute it.
  79 There is NO WARRANTY, to the extent permitted by law.
  80 "
  81 }
  82
  83 warn()
  84 {
  85     printf '%s\n' "$@" 1>&2
  86 }
  87
  88 chkstatus_or_exit()
  89 {
  90     status=$?
  91
  92     if test $status -ne 0
  93     then
  94         echo "Return status = $status" 1>&2
  95         exit "${1-2}";  # If not given, defaults to 2
  96     fi
  97
  98     unset -v status
  99 }
 100
 101 # Function to test and extract compressed files
 102 unpack()
 103 {
 104     for file in "$@"
 105     do
 106         case $file in
 107         *.tar)
 108             tar tf "$file" > /dev/null && \
 109             tar xpf "$file"
 110             chkstatus_or_exit 3
 111             ;;
 112         *.tar.gz | *.tgz | *.tar.Z )
 113             gzip -cd "$file" | tar tf - > /dev/null && \
 114             gzip -cd "$file" | tar xpf -
 115             chkstatus_or_exit 3
 116             ;;
 117         *.tar.bz2 | *.tbz2 | *.tbz )
 118             bzip2 -cd "$file" | tar tf - > /dev/null && \
 119             bzip2 -cd "$file" | tar xpf -
 120             chkstatus_or_exit 3
 121             ;;
 122         *.tar.lz | *.tlz )
 123             lzip -cd "$file" | tar tf - > /dev/null && \
 124             lzip -cd "$file" | tar xpf -
 125             chkstatus_or_exit 3
 126             ;;
 127         *.tar.xz | *.txz )
 128             xz -cd "$file" | tar tf - > /dev/null && \
 129             xz -cd "$file" | tar xpf -
 130             chkstatus_or_exit 3
 131             ;;
 132         *.zip | *.ZIP )
 133             unzip -t "$file" > /dev/null && \
 134             unzip "$file" > /dev/null
 135             chkstatus_or_exit 3
 136             ;;
 137         *.gz)
 138             gzip -t "$file" && \
 139             gzip -cd "$file" > "$(basename -- "$file" .gz)"
 140             chkstatus_or_exit 3
 141             ;;
 142         *.Z)
 143             gzip -t "$file" && \
 144             gzip -cd "$file" > "$(basename -- "$file" .Z)"
 145             chkstatus_or_exit 3
 146             ;;
 147         *.bz2)
 148             bzip2 -t "$file" && \
 149             bzip2 -cd "$file" > "$(basename -- "$file" .bz2)"
 150             chkstatus_or_exit 3
 151             ;;
 152         *.lz)
 153             lzip -t "$file" && \
 154             lzip -cd "$file" > "$(basename -- "$file" .lz)"
 155             chkstatus_or_exit 3
 156             ;;
 157         *.xz)
 158             xz -t "$file" && \
 159             xz -cd "$file" > "$(basename -- "$file" .xz)"
 160             chkstatus_or_exit 3
 161             ;;
 162         *)
 163             warn "${PROGRAM}: cannot unpack ${file}: Unsupported extension"
 164             exit 1
 165         esac
 166     done
 167     unset -v file
 168 }
 169
 170 # Print a warning for good practices.
 171 #
 172 # Recommended practices is to set variables
 173 # in front of `configure' or make(1), see:
 174 #
 175 # http://www.gnu.org/software/make/manual/html_node/Environment.html
 176 # http://gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.69/html_node/Defining-Variables.html
 177 # http://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.69/html_node/Setting-Output-Variables.html
 178
 179 warn_flags()
 180 {
 181     warn "" \
 182      "WARNING: Environment variable '$1' is set."   \
 183      "This will be unset to avoid possible risks."  \
 184      ""
 185 }
 186
 187 ### Default values
 188
 189 BTCC="${BTCC:=cc}"
 190 BTCXX="${BTCXX:=c++}"
 191 BTCFLAGS="${BTCFLAGS:=-g0 -Os -pipe}"
 192 BTCXXFLAGS="${BTCXXFLAGS:=-g0 -Os -pipe}"
 193 BTLDFLAGS="${BTLDFLAGS:=-s}"
 194 opt_keep=opt_keep.off
 195 stage=0
 196 libSuffix=""
 197 arch="$(uname -m)" || chkstatus_or_exit
 198 jobs=1
 199 worktree="$CWD"
 200 output=${worktree}/OUTPUT.${PROGRAM}
 201 TMPDIR="${TMPDIR:=${output}/sources}"
 202
 203 # Compose vendor name adding "-" as suffix
 204 test -n "$VENDOR" && VENDOR="${VENDOR}-"
 205
 206 ### Parse options
 207
 208 while getopts :ha:j:ko:s:V name
 209 do
 210     case $name in
 211     h)
 212         usage
 213         exit 0
 214         ;;
 215     a)
 216         arch="$OPTARG"
 217         ;;
 218     j)
 219         jobs="$OPTARG"
 220         ;;
 221     k)
 222         opt_keep=opt_keep
 223         ;;
 224     o)
 225         output="$OPTARG"
 226         ;;
 227     s)
 228         stage="$OPTARG"
 229         ;;
 230     V)
 231         version
 232         exit 0
 233         ;;
 234     :)
 235         warn "Option '-${OPTARG}' requires an argument"
 236         usage
 237         exit 1
 238         ;;
 239     \?)
 240         warn "Illegal option -- '-${OPTARG}'"
 241         usage
 242         exit 1
 243         ;;
 244     esac
 245 done
 246 shift $(( OPTIND - 1 ))
 247
 248 # Check for environment variables, print warning, unset in any case
 249
 250 test -n "$CC" && warn_flags CC
 251 test -n "$CXX" && warn_flags CXX
 252 test -n "$CFLAGS" && warn_flags CFLAGS
 253 test -n "$CXXFLAGS" && warn_flags CXXFLAGS
 254 test -n "$LDFLAGS" && warn_flags LDFLAGS
 255 unset CC CXX CFLAGS CXXFLAGS LDFLAGS warn_flags
 256
 257 # Load target architecture-file
 258
 259 if test -f "${worktree}/targets/$arch"
 260 then
 261     echo "${PROGRAM}: Loading target $arch ..."
 262     . "${worktree}/targets/$arch"
 263 else
 264     warn \
 265      "${PROGRAM}: Target name not recognized -- '${arch}'" \
 266      "See '$0 -h' for more information"
 267     exit 1
 268 fi
 269
 270 # Determine the host to use.
 271 #
 272 # Set up the host if a C compiler command was exported,
 273 # otherwise, a local `cc' will be used instead
 274
 275 if test -n "$BTCC"
 276 then
 277     host="$(${BTCC} -dumpmachine)" || chkstatus_or_exit
 278 else
 279     host="$(cc -dumpmachine)" || chkstatus_or_exit
 280 fi
 281
 282 # If the host and the target are the same triplet, it won't work.
 283 # We are changing the host if it is really needed
 284
 285 if test "$host" = "$target"
 286 then
 287     # Rename VENDOR to 'cross'.  If empty, 'cross-linux' is added
 288     case "${host%-*-*}" in
 289     *-*)
 290         host="$(echo "$host" | sed -e 's/-[^-]*/-cross/')"
 291         ;;
 292     *)
 293         host="$(echo "$host" | sed -e 's/-[^-]*/-cross-linux/')"
 294         ;;
 295     esac
 296 fi
 297
 298 # Compose variables for the physical output,
 299 # printing some useful information
 300
 301 crossdir=${output}/cross/${target}
 302 rootdir=${output}/stage${stage}
 303
 304 printf '%s\n' \
 305  "BTCC: $BTCC"                  \
 306  "BTCXX: $BTCXX"                \
 307  "BTCFLAGS: $BTCFLAGS"          \
 308  "BTCXXFLAGS: $BTCXXFLAGS"      \
 309  "BTLDFLAGS: $BTLDFLAGS"        \
 310  "Host: $host"                  \
 311  "Target: $target"              \
 312  "Output directory: $output"    \
 313  "Cross  directory: $crossdir"  \
 314  "Root   directory: $rootdir"
 315
 316 # Remove write permission for group and other
 317 umask 022
 318
 319 # Create required directories
 320 mkdir -p -- "$output" "$TMPDIR"
 321 chkstatus_or_exit
 322
 323 # Set default PATH, propagate variables
 324 PATH="${crossdir}/bin:${PATH}"
 325
 326 export PATH VENDOR TMPDIR
 327
 328 # Main loop
 329 for file in ${CWD}/stages/${stage}/${@:-??-*}
 330 do
 331     file="${file##*/}"
 332
 333     if test ! -f "${CWD}/stages/${stage}/$file"
 334     then
 335         warn "${PROGRAM}: ${stage}/${file}: No such file or stage number"
 336         exit 1
 337     fi
 338     if test ! -x "${CWD}/stages/${stage}/$file"
 339     then
 340         warn "${PROGRAM}: ${stage}/${file}: File not executable, dodging"
 341         continue;
 342     fi
 343
 344     ### Stage pre-settings
 345
 346     # Create sysroot directory, recreating the symlink for the stage 0
 347
 348     if test "$stage" = 0
 349     then
 350         mkdir -p -- "${crossdir}/$target" || chkstatus_or_exit
 351
 352         if test ! -e "${crossdir}/${target}/usr"
 353         then
 354             ln -sf . "${crossdir}/${target}/usr" || chkstatus_or_exit
 355         fi
 356
 357         # Ensure toolchain sanity for multilib purposes
 358         case $arch in
 359         aarch64* | arm* | i586 | *x32 | x86_64 | riscv* )
 360             if test ! -e "${crossdir}/lib" && test -n "$libSuffix"
 361             then
 362                 ln -sf lib${libSuffix} "${crossdir}/lib" || chkstatus_or_exit
 363             fi
 364             ;;
 365         esac
 366     fi
 367
 368     # Create "tools" directory, recreating the symlink for the stage 1
 369     if test "$stage" = 1
 370     then
 371         if test ! -d "${rootdir}/tools"
 372         then
 373             mkdir -p -- "${rootdir}/tools" || chkstatus_or_exit
 374         fi
 375
 376         # Make required symlink
 377         ln -sf "${rootdir}/tools" / || chkstatus_or_exit
 378     fi
 379
 380     echo "${PROGRAM}: Processing $file from stage $stage ..."
 381
 382     # Set trap before to run the script in order to
 383     # catch the return status, exit code 2 if fails
 384
 385     trap 'chkstatus_or_exit 2' EXIT HUP INT QUIT ABRT TERM
 386
 387     # Exit immediately on any error
 388     set -e
 389
 390     . "${CWD}/stages/${stage}/$file"
 391
 392     # Deactivate shell option(s)
 393     set +e
 394
 395     # Reset given signals
 396     trap - EXIT HUP INT QUIT ABRT TERM
 397
 398     # Delete declared directories on the cleanup() function
 399     if test "$opt_keep" != opt_keep
 400     then
 401         if type cleanup 1> /dev/null 2> /dev/null
 402         then
 403             cleanup
 404             chkstatus_or_exit 2
 405             unset -f cleanup
 406         fi
 407     fi
 408
 409     # Back to the current working directory
 410     cd -- "$CWD" || chkstatus_or_exit
 411 done
 412