summaryrefslogtreecommitdiffstats
path: root/tools/rockboxdev.sh
blob: 63b1a1f5a143ad729b6ce348e09c114eea581adb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
#!/bin/bash

# Abort execution as soon as an error is encountered
# That way the script do not let the user think the process completed correctly
# and leave the opportunity to fix the problem and restart compilation where
# it stopped
set -e

# this is where this script will store downloaded files and check for already
# downloaded files
dlwhere="${RBDEV_DOWNLOAD:-/tmp/rbdev-dl}"

# will append the target string to the prefix dir mentioned here
# Note that the user running this script must be able to do make install in
# this given prefix directory. Also make sure that this given root dir
# exists.
prefix="${RBDEV_PREFIX:-/usr/local}"

# This directory is used to extract all files and to build everything in. It
# must not exist before this script is invoked (as a security measure).
builddir="${RBDEV_BUILD:-/tmp/rbdev-build}"

# This script needs to use GNU Make. On Linux systems, GNU Make is invoked
# by running the "make" command, on most BSD systems, GNU Make is invoked
# by running the "gmake" command. Set the "make" variable accordingly.
if [ -f "`which gmake 2>/dev/null`" ]; then
    make="gmake"
else
    make="make"
fi

# record version
makever=`$make -v |sed -n '1p' | sed -e 's/.* \([0-9]*\)\.\([0-9]*\).*/\1\2/'`

# This is the absolute path to where the script resides.
rockboxdevdir="$( readlink -f "$( dirname "${BASH_SOURCE[0]}" )" )"
patch_dir="$rockboxdevdir/toolchain-patches"

if [ `uname -s` = "Darwin" ]; then
    parallel=`sysctl -n hw.physicalcpu`
else
    parallel=`nproc`
fi

if [ $parallel -gt 1 ] ; then
  make_parallel=-j$parallel
fi

if [ -z $GNU_MIRROR ] ; then
    GNU_MIRROR=http://mirrors.kernel.org/gnu
fi

if [ -z $LINUX_MIRROR ] ; then
    LINUX_MIRROR=http://www.kernel.org/pub/linux
fi

# These are the tools this script requires and depends upon.
reqtools="gcc g++ xz bzip2 gzip $make patch makeinfo automake libtool autoconf flex bison"

##############################################################################
# Functions:

findtool(){
  file="$1"

  IFS=":"
  for path in $PATH
  do
    # echo "Checks for $file in $path" >&2
    if test -f "$path/$file"; then
      echo "$path/$file"
      return
    fi
  done
}

findlib (){
    lib="$1"
    # on error, gcc will spit out "cannot find -lxxxx", but it may not be in
    # english so grep for -lxxxx
    if ! gcc -l$lib 2>&1 | grep -q -- "-l$lib"; then
        echo "ok"
        return
    fi
}

# check if all the libraries in argument are installed, exit with error if not
checklib() {
    for t in "$@"; do
        lib=`findlib $t`
        if test -z "$lib"; then
            echo "ROCKBOXDEV: library \"$t\" is required for this script to work."
            missingtools="yes"
        fi
    done
    if [ -n "$missingtools" ]; then
        echo "ROCKBOXDEV: Please install the missing libraries and re-run the script."
        exit 1
    fi
}

input() {
    read response
    echo $response
}

# compare two versions, return 1 if first version is strictly before the second
# version_lt ver1 ver2
version_lt() {
    # use sort with natural version sorting
    ltver=`printf "$1\n$2" | sort -V | head -n 1`
    [ "$1" = "$ltver" ] && true || false
}

# Download a file from a server (unless it already exists locally in $dlwhere).
# The output file name is always $dlwhere/$1, and the function will try URLs
# one after the other
# $1 file
# $2 server file name
# $2,$3,... URL root list
getfile_ex() {
    out_file="$dlwhere/$1"
    srv_file="$2"
    if test -f $out_file; then
        echo "ROCKBOXDEV: Skipping download of $1: File already exists"
        return
    fi
    # find tool (curl or wget) and build download command
    tool=`findtool curl`
    if test -z "$tool"; then
        tool=`findtool wget`
        if test -n "$tool"; then
            # wget download
            echo "ROCKBOXDEV: Downloading $1 using wget"
            tool="$tool -T 60 -O "
        else
            echo "ROCKBOXDEV: No downloader tool found!"
            echo "ROCKBOXDEV: Please install curl or wget and re-run the script"
            exit
        fi
    else
        # curl download
        echo "ROCKBOXDEV: Downloading $1 using curl"
        tool="$tool -fLo "
    fi

    # shift arguments so that $@ is the list of URLs
    shift
    shift
    for url in "$@"; do
        echo "ROCKBOXDEV: try $url/$srv_file"
        if $tool "$out_file" "$url/$srv_file"; then
            return
        fi
    done

    echo "ROCKBOXDEV: couldn't download the file!"
    echo "ROCKBOXDEV: check your internet connection"
    exit
}

#$1 file
#$2 URL"root
# Output file name is the same as the server file name ($1)
# Does not download the file if it already exists locally in $dlwhere/
getfile() {
    getfile_ex "$1" "$1" "$2"
}

# wrapper around getfile to abstract url
# getttool tool version
# the file is always downloaded to "$dlwhere/$toolname-$version.tar.bz2"
gettool() {
    toolname="$1"
    version="$2"
    ext="tar.bz2"
    file="$toolname-$version"
    srv_file="$toolname-$version"
    case $toolname in
        gcc)
            # before 4.7, the tarball was named gcc-core
            if version_lt "$version" "4.7"; then
                srv_file="gcc-core-$version"
            fi
            url="$GNU_MIRROR/gcc/gcc-$version"
	    if ! version_lt "$version" "7.2"; then
		ext="tar.xz"
	    fi
            ;;

        binutils)
            url="$GNU_MIRROR/binutils"
	    if ! version_lt "$version" "2.28.1"; then
		ext="tar.xz"
	    fi
            ;;

        glibc)
            url="$GNU_MIRROR/glibc"
	    if ! version_lt "$version" "2.11"; then
		ext="tar.xz"
	    fi
            ;;

        alsa-lib)
            url="ftp://ftp.alsa-project.org/pub/lib"
            ;;

        libffi)
            url="ftp://sourceware.org/pub/libffi"
            ext="tar.gz"
            ;;

        glib)
            url="https://ftp.gnome.org/pub/gnome/sources/glib/2.46"
            ext="tar.xz"
            ;;

        zlib)
            url="https://www.zlib.net/fossils"
            ext="tar.gz"
            ;;

        dbus)
            url="https://dbus.freedesktop.org/releases/dbus"
            ext="tar.gz"
            ;;

        expat)
            url="https://src.fedoraproject.org/repo/pkgs/expat/expat-2.1.0.tar.gz/dd7dab7a5fea97d2a6a43f511449b7cd"
            ext="tar.gz"
            ;;

        linux)
            # FIXME linux kernel server uses an overcomplicated architecture,
            # especially for longterm kernels, so we need to lookup several
            # places. This will need fixing for non-4-part 2.6 versions but it
            # is written in a way that should make it easy
            case "$version" in
                2.6.*.*)
                    # 4-part versions -> remove last digit for longterm
                    longterm_ver="${version%.*}"
                    top_dir="v2.6"
                    ;;
                3.*)
                    longterm_ver=""
                    top_dir="v3.x"
                    ;;
                *)
                    echo "ROCKBOXDEV: I don't know how to handle this kernel version: $version"
                    exit
                ;;
            esac
            base_url="http://www.kernel.org/pub/linux/kernel/$top_dir"
            # we try several URLs, the 2.6 versions are a mess and need that
            url="$base_url $base_url/longterm/v$longterm_ver $base_url/longterm"
            ext="tar.gz"
            ;;

        *)
            echo "ROCKBOXDEV: Bad toolname $toolname"
            exit
            ;;
    esac
    getfile_ex "$file.$ext" "$srv_file.$ext" $url
}

# extract file to the current directory
# extract file
extract() {
    if [ -d "$1" ]; then
        echo "ROCKBOXDEV: Skipping extraction of $1: already done"
        return
    fi
    echo "ROCKBOXDEV: extracting $1"
    if [ -f "$dlwhere/$1.tar.bz2" ]; then
        tar xjf "$dlwhere/$1.tar.bz2"
    elif [ -f "$dlwhere/$1.tar.gz" ]; then
        tar xzf "$dlwhere/$1.tar.gz"
    elif [ -f "$dlwhere/$1.tar.xz" ]; then
        tar xJf "$dlwhere/$1.tar.xz"
    else
        echo "ROCKBOXDEV: unknown compression for $1"
        exit
    fi
}

# run a command, and a log command and output to a file (append)
# exit on error
# run_cmd logfile cmd...
run_cmd() {
    logfile="$1"
    shift
    echo "Running '$@'" >>$logfile
    if ! $@ >> "$logfile" 2>&1; then
        echo "ROCKBOXDEV: an error occured, please see $logfile"
        exit 1
    fi
}

# check if the following should be executed or not, depending on RBDEV_RESTART variable:
# $1=tool
# If RBDEV_RESTART is empty, always perform step, otherwise only perform is there
# is an exact match. On the first match, RBDEV_RESTART is reset to "" so that next step
# are executed
check_restart() {
    if [ "x$RBDEV_RESTART" = "x" ]; then
        return 0
    elif [ "$1" = "$RBDEV_RESTART" ]; then
        RBDEV_RESTART=""
        return 0
    else
        return 1
    fi
}

# advanced tool building: create a build directory, run configure, run make
# and run make install. It is possible to customize all steps or disable them
# $1=tool
# $2=version
# $3=configure options, or "NO_CONFIGURE" to disable step
# $4=make options, or "NO_MAKE" to disable step
# $5=make install options (will be replaced by "install" if left empty)
# By default, the restary step is the toolname, but it can be changed by setting
# RESTART_STEP
buildtool() {
    tool="$1"
    version="$2"
    toolname="$tool-$version"
    config_opt="$3"
    make_opts="$4"
    install_opts="$5"
    logfile="$builddir/build-$toolname.log"

    stepname=${RESTART_STEP:-$tool}
    if ! check_restart "$stepname"; then
        echo "ROCKBOXDEV: Skipping step '$stepname' as requested per RBDEV_RESTART"
        return
    fi
    echo "ROCKBOXDEV: Starting step '$stepname'"

    echo "ROCKBOXDEV: logging to $logfile"
    rm -f "$logfile"

    echo "ROCKBOXDEV: mkdir build-$toolname"
    mkdir "build-$toolname"

    cd build-$toolname

    # in-tree/out-of-tree build
    case "$tool" in
        linux|alsa-lib)
            # in-intree
            echo "ROCKBOXDEV: copy $toolname for in-tree build"
            # copy the source directory to the build directory
            cp -r ../$toolname/* .
            cfg_dir="."
            ;;
        *)
            # out-of-tree
            cfg_dir="../$toolname";
            ;;
    esac

    if [ "$RESTART_STEP" == "gcc-stage1" ] ; then
	CXXFLAGS="-std=gnu++03"
    elif [ "$RESTART_STEP" == "gcc-stage2" ] ; then
	CXXFLAGS="-std=gnu++11"
    else
	CXXFLAGS=""
    fi

    if [ "$tool" == "zlib" ]; then
        echo "ROCKBOXDEV: $toolname/configure"
        # NOTE glibc requires to be compiled with optimization
        CFLAGS='-U_FORTIFY_SOURCE -fgnu89-inline -O2' run_cmd "$logfile" \
            "$cfg_dir/configure" "--prefix=$prefix" \
            $config_opt
    elif [ "$config_opt" != "NO_CONFIGURE" ]; then
        echo "ROCKBOXDEV: $toolname/configure"
        # NOTE glibc requires to be compiled with optimization
        CFLAGS='-U_FORTIFY_SOURCE -fgnu89-inline -O2' CXXFLAGS="$CXXFLAGS" run_cmd "$logfile" \
            "$cfg_dir/configure" "--prefix=$prefix" \
            --disable-docs $config_opt
    fi

    if [ "$make_opts" != "NO_MAKE" ]; then
        echo "ROCKBOXDEV: $toolname/make"
        run_cmd "$logfile" $make $make_parallel $make_opts
    fi

    if [ "$install_opts" = "" ]; then
        install_opts="install"
    fi
    echo "ROCKBOXDEV: $toolname/make (install)"
    run_cmd "$logfile" $make $install_opts

    cd ..

    echo "ROCKBOXDEV: rm -rf build-$toolname $toolname"
    rm -rf build-$toolname
    if [ "$stepname" != "gcc-stage1" ] ; then
        echo "ROCKBOXDEV: rm -rf $toolname"
        rm -rf $toolname
    fi
}

build() {
    toolname="$1"
    target="$2"
    version="$3"
    patch="$4"
    configure_params="$5"
    needs_libs="$6"
    logfile="$builddir/build-$toolname.log"

    stepname=${RESTART_STEP:-$toolname}
    if ! check_restart "$stepname"; then
        echo "ROCKBOXDEV: Skipping step '$stepname' as requested per RBDEV_RESTART"
        return
    fi
    echo "ROCKBOXDEV: Starting step '$stepname'"

    # create build directory
    if test -d $builddir; then
        if test ! -w $builddir; then
            echo "ROCKBOXDEV: No write permission for $builddir"
            exit
        fi
    else
        mkdir -p $builddir
    fi

    # download source tarball
    gettool "$toolname" "$version"
    file="$toolname-$version"

    cd $builddir

    extract "$toolname-$version"

    # do we have a patch?
    for p in $patch; do
        echo "ROCKBOXDEV: applying patch $p"

        # apply the patch
        (cd $builddir/$toolname-$version && patch -p1 < "$patch_dir/$p")

        # check if the patch applied cleanly
        if [ $? -gt 0 ]; then
            echo "ROCKBOXDEV: failed to apply patch $p"
            exit
        fi
    done

    # kludge to avoid having to install GMP, MPFR, MPC and ISL
    if test -n "$needs_libs"; then
        cd "$toolname-$version"
        if (echo $needs_libs | grep -q gmp && test ! -d gmp); then
            echo "ROCKBOXDEV: Getting GMP"
            getfile "gmp-4.3.2.tar.bz2" "$GNU_MIRROR/gmp"
            tar xjf $dlwhere/gmp-4.3.2.tar.bz2
            ln -s gmp-4.3.2 gmp
        fi

        if (echo $needs_libs | grep -q mpfr && test ! -d mpfr); then
            echo "ROCKBOXDEV: Getting MPFR"
            getfile "mpfr-3.1.0.tar.bz2" "$GNU_MIRROR/mpfr"
            tar xjf $dlwhere/mpfr-3.1.0.tar.bz2
            ln -s mpfr-3.1.0 mpfr
        fi

        if (echo $needs_libs | grep -q mpc && test ! -d mpc); then
            echo "ROCKBOXDEV: Getting MPC"
            getfile "mpc-1.0.1.tar.gz" "http://www.multiprecision.org/downloads"
            tar xzf $dlwhere/mpc-1.0.1.tar.gz
            ln -s mpc-1.0.1 mpc
        fi

        if (echo $needs_libs | grep -q isl && test ! -d isl); then
            echo "ROCKBOXDEV: Getting ISL"
            getfile "isl-0.15.tar.bz2" "https://gcc.gnu.org/pub/gcc/infrastructure"
            tar xjf $dlwhere/isl-0.15.tar.bz2
            ln -s isl-0.15 isl
        fi
        cd $builddir
    fi

    # GCC is special
    if [ "$toolname" == "gcc" ] ; then
	configure_params="--enable-languages=c --disable-libssp $configure_params"
    fi

    echo "ROCKBOXDEV: logging to $logfile"
    rm -f "$logfile"

    echo "ROCKBOXDEV: mkdir build-$toolname"
    mkdir build-$toolname

    cd build-$toolname

    echo "ROCKBOXDEV: $toolname/configure"
    CFLAGS='-U_FORTIFY_SOURCE -fgnu89-inline -fcommon -O2' CXXFLAGS='-std=gnu++03' run_cmd "$logfile" ../$toolname-$version/configure --target=$target --prefix=$prefix --disable-docs $configure_params

    echo "ROCKBOXDEV: $toolname/make"
    run_cmd "$logfile" $make $make_parallel

    echo "ROCKBOXDEV: $toolname/make install"
    run_cmd "$logfile" $make install

    cd ..

    echo "ROCKBOXDEV: rm -rf build-$toolname $toolname-$version"
    rm -rf build-$toolname $toolname-$version
}

# build a cross compiler toolchain for linux
# $1=target
# $2=binutils version
# $3=binutils configure extra options
# $4=gcc version
# $5=gcc configure extra options
# $6=linux version
# $7=glibc version
# $8=glibc configure extra options
build_linux_toolchain () {
    target="$1"
    binutils_ver="$2"
    binutils_opts="$3"
    gcc_ver="$4"
    gcc_opts="$5"
    linux_ver="$6"
    glibc_ver="$7"
    glibc_opts="$8"
    glibc_patches="$9"

    # where to put the sysroot
    sysroot="$prefix/$target/sysroot"
    # extract arch from target
    arch=${target%%-*}

    # check libraries:
    # contrary to other toolchains that rely on a hack to avoid installing
    # gmp, mpc and mpfr, we simply require that they are installed on the system
    # this is not a huge requirement since virtually all systems these days
    # provide dev packages for them
    # FIXME: maybe add an option to download and install them automatically
    checklib "mpc" "gmp" "mpfr"

    # create build directory
    if test -d $builddir; then
        if test ! -w $builddir; then
            echo "ROCKBOXDEV: No write permission for $builddir"
            exit
        fi
    else
        mkdir -p $builddir
    fi

    if [ "$makever" -gt 43 ] ; then
	glibc_make_opts="--jobserver-style=pipe --shuffle=none"
#	MAKEFLAGS="--jobserver-style=pipe --shuffle=none"
    fi

    # download all tools
    gettool "binutils" "$binutils_ver"
    gettool "gcc" "$gcc_ver"
    gettool "linux" "$linux_ver"
    gettool "glibc" "$glibc_ver"

    # extract them
    cd $builddir
    extract "binutils-$binutils_ver"
    extract "gcc-$gcc_ver"
    extract "linux-$linux_ver"
    extract "glibc-$glibc_ver"

    # do we have a patch?
    for p in $glibc_patches; do
        echo "ROCKBOXDEV: applying patch $p"
	(cd $builddir/glibc-$glibc_ver ; patch -p1 < "$patch_dir/$p")

	# check if the patch applied cleanly
        if [ $? -gt 0 ]; then
            echo "ROCKBOXDEV: failed to apply patch $p"
            exit
        fi
    done

    # we make it possible to restart a build on error by using the RBDEV_RESTART
    # variable, the format is RBDEV_RESTART="tool" where tool is the toolname at which
    # to restart (binutils, gcc)

    # install binutils, with support for sysroot
    buildtool "binutils" "$binutils_ver" "--target=$target --disable-werror \
        --with-sysroot=$sysroot --disable-nls" "" ""
    # build stage 1 compiler: disable headers, disable threading so that
    # pthread headers are not included, pretend we use newlib so that libgcc
    # doesn't get linked at the end
    # NOTE there is some magic involved here
    RESTART_STEP="gcc-stage1" \
    buildtool "gcc" "$gcc_ver" "$gcc_opts --enable-languages=c --target=$target \
        --without-headers --disable-threads --disable-libgomp --disable-libmudflap \
        --disable-libssp --disable-libquadmath --disable-libquadmath-support \
        --disable-shared --with-newlib --disable-libitm \
        --disable-libsanitizer --disable-libatomic" "" ""
    # install linux headers
    # NOTE: we need to tell make where to put the build files, since buildtool
    # switches to the builddir, "." will be the correct builddir when ran
    if [ "$arch" == "mipsel" ]; then
        arch="mips"
    fi
    linux_opts="O=. ARCH=$arch INSTALL_HDR_PATH=$sysroot/usr/"
    RESTART_STEP="linux-headers" \
    buildtool "linux" "$linux_ver" "NO_CONFIGURE" \
        "$linux_opts headers_install" "$linux_opts headers_check"
    # build glibc using the first stage cross compiler
    # we need to set the prefix to /usr because the glibc runs on the actual
    # target and is indeed installed in /usr
    RESTART_STEP="glibc" \
    prefix="/usr" \
    buildtool "glibc" "$glibc_ver" "--target=$target --host=$target --build=$MACHTYPE \
        --with-__thread --with-headers=$sysroot/usr/include $glibc_opts" \
        "$glibc_make_opts" "install install_root=$sysroot"
    # build stage 2 compiler
    RESTART_STEP="gcc-stage2" \
    buildtool "gcc" "$gcc_ver" "$gcc_opts --enable-languages=c,c++ --target=$target \
        --with-sysroot=$sysroot" "" ""
}

usage () {
    echo "usage: rockboxdev.sh [options]"
    echo "options:"
    echo "  --help              Display this help"
    echo "  --target=LIST       List of targets to build"
    echo "  --restart=STEP      Restart build at given STEP (same as RBDEV_RESTART env var)"
    echo "  --prefix=PREFIX     Set install prefix (same as RBDEV_PREFIX env var)"
    echo "  --dlwhere=DIR       Set download directory (same as RBDEV_DOWNLOAD env var)"
    echo "  --builddir=DIR      Set build directory (same as RBDEV_BUILD env var)"
    echo "  --makeflags=FLAGS   Set make flags (same as MAKEFLAGS env var)"
    exit 1
}

##############################################################################
# Code:

# Parse arguments
for i in "$@"
do
case $i in
    --help)
        usage
        ;;
    --prefix=*)
        prefix="${i#*=}"
        shift
        ;;
    --target=*)
        RBDEV_TARGET="${i#*=}"
        shift
        ;;
    --restart=*)
        RBDEV_RESTART="${i#*=}"
        shift
        ;;
    --dlwhere=*)
        dlwhere="${i#*=}"
        shift
        ;;
    --builddir=*)
        builddir="${i#*=}"
        shift
        ;;
    --makeflags=*)
        export MAKEFLAGS="${i#*=}" # export so it's available in make
        shift
        ;;
    *)
        echo "Unknown option '$i'"
        exit 1
        ;;
esac
done

# Verify required tools and libraries
for t in $reqtools; do
    tool=`findtool $t`
    if test -z "$tool"; then
        echo "ROCKBOXDEV: \"$t\" is required for this script to work."
        missingtools="yes"
    fi
done
if [ -n "$missingtools" ]; then
    echo "ROCKBOXDEV: Please install the missing tools and re-run the script."
    exit 1
fi

if ! $make -v | grep -q GNU ; then
    echo "ROCKBOXDEV: Building the rockbox toolchains requires GNU Make."
    exit 1
fi

dlwhere=$(readlink -f "$dlwhere")
prefix=$(readlink -f "$prefix")
builddir=$(readlink -f "$builddir")

echo "Download directory : $dlwhere (set RBDEV_DOWNLOAD or use --dlwhere= to change)"
echo "Install prefix     : $prefix  (set RBDEV_PREFIX or use --prefix= to change)"
echo "Build dir          : $builddir (set RBDEV_BUILD or use --builddir= to change)"
echo "Make options       : $MAKEFLAGS (set MAKEFLAGS or use --makeflags= to change)"
echo "Restart step       : $RBDEV_RESTART (set RBDEV_RESTART or use --restart= to change)"
echo "Target arch        : $RBDEV_TARGET (set RBDEV_TARGET or use --target= to change)"

# Verify download directory
if test -d "$dlwhere"; then
  if ! test -w "$dlwhere"; then
    echo "ROCKBOXDEV: No write permission for $dlwhere"
    exit
  fi
else
  mkdir $dlwhere
  if test $? -ne 0; then
    echo "ROCKBOXDEV: Failed creating directory $dlwhere"
    exit
  fi
fi


# Verify the prefix dir
if test ! -d $prefix; then
  mkdir -p $prefix
  if test $? -ne 0; then
      echo "ROCKBOXDEV: Failed creating directory $prefix"
      exit
  fi
fi
if test ! -w $prefix; then
  echo "ROCKBOXDEV: No write permission for $prefix"
  exit
fi

if [ -z "$RBDEV_TARGET" ]; then
    echo "Select target arch:"
    echo "m   - m68k     (iriver h1x0/h3x0, iaudio m3/m5/x5 and mpio hd200)"
    echo "a   - arm      (ipods, iriver H10, Sansa, D2, Gigabeat, older Sony NWZ, etc)"
    echo "i   - mips     (Jz47xx and ATJ-based players)"
    echo "x   - arm-linux  (Generic Linux ARM: Samsung ypr0, Linux-based Sony NWZ)"
    echo "y   - mips-linux  (Generic Linux MIPS: eg the many HiBy-OS targets)"
    echo "separate multiple targets with spaces"
    echo "(Example: \"m a i\" will build m68k, arm, and mips)"
    echo ""
    selarch=`input`
else
    selarch=$RBDEV_TARGET
fi
system=`uname -s`

# add target dir to path to ensure the new binutils are used in gcc build
PATH="$prefix/bin:${PATH}"

for arch in $selarch
do
    export MAKEFLAGS=`echo $MAKEFLAGS| sed 's/ -r / /'`  # We don't want -r
    echo ""
    case $arch in
        [Ii])
            build "binutils" "mipsel-elf" "2.26.1" "" "--disable-werror" "isl"
            build "gcc" "mipsel-elf" "4.9.4" "" "" "gmp mpfr mpc isl"
            ;;

        [Mm])
            build "binutils" "m68k-elf" "2.26.1" "" "--disable-werror" "isl"
            build "gcc" "m68k-elf" "4.9.4" "" "--with-arch=cf MAKEINFO=missing" "gmp mpfr mpc isl"
            ;;

        [Aa])
            binopts=""
            gccopts=""
            case $system in
                Darwin)
                    binopts="--disable-nls"
                    gccopts="--disable-nls"
                    ;;
            esac
            build "binutils" "arm-elf-eabi" "2.26.1" "" "$binopts --disable-werror" "isl"
            build "gcc" "arm-elf-eabi" "4.9.4" "rockbox-multilibs-noexceptions-arm-elf-eabi-gcc-4.9.4.diff" "$gccopts MAKEINFO=missing" "gmp mpfr mpc isl"
            ;;
        [Xx])
            # IMPORTANT NOTE
            # This toolchain must support several targets and thus must support
            # the oldest possible configuration.
            #
            # Samsung YP-R0/R1:
            #  ARM1176JZF-S, softfp EABI
            #   gcc: 4.9.4 is the latest 4.9.x stable branch, also the only one that
            #        compiles with GCC >6
            #   kernel: 2.6.27.59 is the same 2.6.x stable kernel as used by the
            #           original ct-ng toolchain, the device runs kernel 2.6.24
            #   glibc: 2.19 is the latest version that supports kernel 2.6.24 which
            #          is used on the device, but we need to support ABI 2.4 because
            #          the device uses glibc 2.4.2
            #
            # Sony NWZ:
            #   gcc: 4.9.4 is the latest 4.9.x stable branch, also the only one that
            #        compiles with GCC >6
            #   kernel: 2.6.32.68 is the latest 2.6.x stable kernel, the device
            #           runs kernel 2.6.23 or 2.6.35 or 3.x for the most recent
            #   glibc: 2.19 is the latest version that supports kernel 2.6.23 which
            #          is used on many Sony players, but we need to support ABI 2.7
            #          because the device uses glibc 2.7
            #
            # Thus the lowest common denominator is to use the latest 2.6.x stable
            # kernel but compile glibc to support kernel 2.6.23 and glibc 2.4.
            # We use a recent 2.26.1 binutils to avoid any build problems and
            # avoid patches/bugs.
            glibcopts="--enable-kernel=2.6.23 --enable-oldest-abi=2.4"
            build_linux_toolchain "arm-rockbox-linux-gnueabi" "2.26.1" "" "4.9.4" \
                "$gccopts" "2.6.32.68" "2.19" "$glibcopts" "glibc-220-make44.patch"
            # build alsa-lib
            # we need to set the prefix to how it is on device (/usr) and then
            # tweak install dir at make install step
            alsalib_ver="1.0.19"
            gettool "alsa-lib" "$alsalib_ver"
            extract "alsa-lib-$alsalib_ver"
            prefix="/usr" buildtool "alsa-lib" "$alsalib_ver" \
                "--host=$target --disable-python" "" "install DESTDIR=$prefix/$target/sysroot"
            ;;
        [Yy])
            # IMPORTANT NOTE
            # This toolchain must support several targets and thus must support
            # the oldest possible configuration.
            #
            # AGPTek Rocker:
            #   XBurst release 1 (something inbetween mips32r1 and mips32r2)
            #   gcc: 4.9.4 is the latest 4.9.x stable branch, also the only one that
            #        compiles with GCC >6
            #   kernel: 3.10.14
            #   glibc: 2.16
            #   alsa: 1.0.29
            #
            # FiiO M3K Linux:
            #   kernel: 3.10.14
            #   glibc: 2.16
            #   alsa: 1.0.26
            #
            # To maximize compatibility, we use kernel 3.2.85 which is the lastest
            # longterm 3.2 kernel and is supported by the latest glibc, and we
            # require support for up to glibc 2.16
            # We use a recent 2.26.1 binutils to avoid any build problems and
            # avoid patches/bugs.
            glibcopts="--enable-kernel=3.2 --enable-oldest-abi=2.16"
            # FIXME: maybe add -mhard-float
            build_linux_toolchain "mipsel-rockbox-linux-gnu" "2.26.1" "" "4.9.4" \
                "$gccopts" "3.2.85" "2.25" "$glibcopts" "glibc-225-make44.patch"
            # build alsa-lib
            # we need to set the prefix to how it is on device (/usr) and then
            # tweak install dir at make install step
            alsalib_ver="1.0.26"
            gettool "alsa-lib" "$alsalib_ver"
            extract "alsa-lib-$alsalib_ver"
            prefix="/usr" buildtool "alsa-lib" "$alsalib_ver" \
                "--host=$target --disable-python" "" "install DESTDIR=$prefix/$target/sysroot"
            # build libffi
	    libffi_ver="3.2.1"
	    gettool "libffi" "$libffi_ver"
	    extract "libffi-$libffi_ver"
	    prefix="/usr" buildtool "libffi" "$libffi_ver" \
               "--includedir=/usr/include --host=$target" "" "install DESTDIR=$prefix/$target/sysroot"
            (cd $prefix/$target/sysroot/usr/include ; ln -sf ../lib/libffi-$libffi_ver/include/ffi.h . ;  ln -sf ../lib/libffi-$libffi_ver/include/ffitarget.h . )

            # build zlib
	    zlib_ver="1.2.13"  # Target uses 1.2.8!
	    gettool "zlib" "$zlib_ver"
	    extract "zlib-$zlib_ver"
	    CHOST=$target prefix="/usr" buildtool "zlib" "$zlib_ver" \
                "" "" "install DESTDIR=$prefix/$target/sysroot"

            # build glib
	    glib_ver="2.46.2"
	    gettool "glib" "$glib_ver"
	    extract "glib-$glib_ver"
	    prefix="/usr" buildtool "glib" "$glib_ver" \
               "--host=$target --with-sysroot=$prefix/$target/sysroot --disable-libelf glib_cv_stack_grows=no glib_cv_uscore=no ac_cv_func_posix_getpwuid_r=yes ac_cv_func_posix_getgrgid_r=yes" "" "install DESTDIR=$prefix/$target/sysroot"

            # build expat
	    expat_ver="2.1.0"
	    gettool "expat" "$expat_ver"
	    extract "expat-$expat_ver"
	    prefix="/usr" buildtool "expat" "$expat_ver" \
               "--host=$target --includedir=/usr/include --enable-abstract-sockets" "" "install DESTDIR=$prefix/$target/sysroot "

            # build dbus
	    dbus_ver="1.10.2"
	    gettool "dbus" "$dbus_ver"
	    extract "dbus-$dbus_ver"
	    prefix="/usr" buildtool "dbus" "$dbus_ver" \
               "--host=$target --with-sysroot=$prefix/$target/sysroot --includedir=/usr/include --enable-abstract-sockets ac_cv_lib_expat_XML_ParserCreate_MM=yes --disable-systemd --disable-launchd --enable-x11-autolaunch=no --with-x=no -disable-selinux --disable-apparmor --disable-doxygen-docs " "" "install DESTDIR=$prefix/$target/sysroot "


            ;;
        *)
            echo "ROCKBOXDEV: Unsupported architecture option: $arch"
            exit
            ;;
    esac
done

echo ""
echo "ROCKBOXDEV: Done!"
echo ""
echo "ROCKBOXDEV: Make sure your PATH includes $prefix/bin"
echo ""