blob: 6b853840495079e4df6b5f924554bd1bb344b117 [file] [log] [blame]
#!/bin/bash
# Grab default values for $CFLAGS and such.
export LANG=c
export LC_ALL=C
set -o pipefail
source ./configure
[ -z "$KCONFIG_CONFIG" ] && KCONFIG_CONFIG=.config
[ -z "$OUTNAME" ] && OUTNAME=toybox
UNSTRIPPED="generated/unstripped/$(basename "$OUTNAME")"
# Since each cc invocation is short, launch half again as many processes
# as we have processors so they don't exit faster than we can start them.
[ -z "$CPUS" ] &&
CPUS=$((($(echo /sys/devices/system/cpu/cpu[0-9]* | wc -w)*3)/2))
if [ -z "$SED" ]
then
[ ! -z "$(which gsed 2>/dev/null)" ] && SED=gsed || SED=sed
fi
# Respond to V= by echoing command lines as well as running them
DOTPROG=
do_loudly()
{
[ ! -z "$V" ] && echo "$@" || echo -n "$DOTPROG"
"$@"
}
# Is anything under directory $2 newer than file $1
isnewer()
{
CHECK="$1"
shift
[ ! -z "$(find "$@" -newer "$CHECK" 2>/dev/null || echo yes)" ]
}
echo "Generate headers from toys/*/*.c..."
mkdir -p generated/unstripped
if isnewer generated/Config.in toys
then
echo "Extract configuration information from toys/*.c files..."
scripts/genconfig.sh
fi
# Create a list of all the commands toybox can provide. Note that the first
# entry is out of order on purpose (the toybox multiplexer command must be the
# first element of the array). The rest must be sorted in alphabetical order
# for fast binary search.
if isnewer generated/newtoys.h toys
then
echo -n "generated/newtoys.h "
echo "USE_TOYBOX(NEWTOY(toybox, NULL, TOYFLAG_STAYROOT))" > generated/newtoys.h
$SED -n -e 's/^USE_[A-Z0-9_]*(/&/p' toys/*/*.c \
| $SED 's/\(.*TOY(\)\([^,]*\),\(.*\)/\2 \1\2,\3/' | sort -s -k 1,1 \
| $SED 's/[^ ]* //' >> generated/newtoys.h
[ $? -ne 0 ] && exit 1
fi
[ ! -z "$V" ] && echo "Which C files to build..."
# Extract a list of toys/*/*.c files to compile from the data in $KCONFIG_CONFIG
# (First command names, then filenames with relevant {NEW,OLD}TOY() macro.)
GITHASH="$(git describe --tags --abbrev=12 2>/dev/null)"
[ ! -z "$GITHASH" ] && GITHASH="-DTOYBOX_VERSION=\"$GITHASH\""
TOYFILES="$($SED -n 's/^CONFIG_\([^=]*\)=.*/\1/p' "$KCONFIG_CONFIG" | xargs | tr ' [A-Z]' '|[a-z]')"
TOYFILES="$(egrep -l "TOY[(]($TOYFILES)[ ,]" toys/*/*.c)"
CFLAGS="$CFLAGS $(cat generated/cflags)"
BUILD="$(echo ${CROSS_COMPILE}${CC} $CFLAGS -I . $OPTIMIZE $GITHASH)"
LIBFILES="$(ls lib/*.c | grep -v lib/help.c)"
TOYFILES="lib/help.c main.c $TOYFILES"
if [ "${TOYFILES/pending//}" != "$TOYFILES" ]
then
echo -e "\n\033[1;31mwarning: using unfinished code from toys/pending\033[0m"
fi
genbuildsh()
{
# Write a canned build line for use on crippled build machines.
echo "#!/bin/sh"
echo
echo "BUILD='$BUILD'"
echo
echo "FILES='$LIBFILES $TOYFILES'"
echo
echo "LINK='$LINK'"
echo
echo
echo '$BUILD $FILES $LINK'
}
if ! cmp -s <(genbuildsh | head -n 3) \
<(head -n 3 generated/build.sh 2>/dev/null)
then
echo -n "Library probe"
# We trust --as-needed to remove each library if we don't use any symbols
# out of it, this loop is because the compiler has no way to ignore a library
# that doesn't exist, so we have to detect and skip nonexistent libraries
# for it.
> generated/optlibs.dat
for i in util crypt m resolv selinux smack attr rt crypto
do
echo "int main(int argc, char *argv[]) {return 0;}" | \
${CROSS_COMPILE}${CC} $CFLAGS -xc - -o generated/libprobe -Wl,--as-needed -l$i > /dev/null 2>/dev/null &&
echo -l$i >> generated/optlibs.dat
echo -n .
done
rm -f generated/libprobe
echo
fi
# LINK needs optlibs.dat, above
LINK="$(echo $LDOPTIMIZE $LDFLAGS -o "$UNSTRIPPED" -Wl,--as-needed $(cat generated/optlibs.dat))"
genbuildsh > generated/build.sh && chmod +x generated/build.sh || exit 1
#TODO: "make $SED && make" doesn't regenerate config.h because diff .config
if true #isnewer generated/config.h "$KCONFIG_CONFIG"
then
echo "Make generated/config.h from $KCONFIG_CONFIG."
# This long and roundabout sed invocation is to make old versions of sed
# happy. New ones have '\n' so can replace one line with two without all
# the branches and tedious mucking about with hold space.
$SED -n \
-e 's/^# CONFIG_\(.*\) is not set.*/\1/' \
-e 't notset' \
-e 's/^CONFIG_\(.*\)=y.*/\1/' \
-e 't isset' \
-e 's/^CONFIG_\([^=]*\)=\(.*\)/#define CFG_\1 \2/p' \
-e 'd' \
-e ':notset' \
-e 'h' \
-e 's/.*/#define CFG_& 0/p' \
-e 'g' \
-e 's/.*/#define USE_&(...)/p' \
-e 'd' \
-e ':isset' \
-e 'h' \
-e 's/.*/#define CFG_& 1/p' \
-e 'g' \
-e 's/.*/#define USE_&(...) __VA_ARGS__/p' \
$KCONFIG_CONFIG > generated/config.h || exit 1
fi
if [ generated/mkflags -ot scripts/mkflags.c ]
then
do_loudly $HOSTCC scripts/mkflags.c -o generated/mkflags || exit 1
fi
# Process config.h and newtoys.h to generate FLAG_x macros. Note we must
# always #define the relevant macro, even when it's disabled, because we
# allow multiple NEWTOY() in the same C file. (When disabled the FLAG is 0,
# so flags&0 becomes a constant 0 allowing dead code elimination.)
make_flagsh()
{
# Parse files through C preprocessor twice, once to get flags for current
# .config and once to get flags for allyesconfig
for I in A B
do
(
# define macros and select header files with option string data
echo "#define NEWTOY(aa,bb,cc) aa $I bb"
echo '#define OLDTOY(...)'
if [ "$I" == A ]
then
cat generated/config.h
else
$SED '/USE_.*([^)]*)$/s/$/ __VA_ARGS__/' generated/config.h
fi
cat generated/newtoys.h
# Run result through preprocessor, glue together " " gaps leftover from USE
# macros, delete comment lines, print any line with a quoted optstring,
# turn any non-quoted opstring (NULL or 0) into " " (because fscanf can't
# handle "" with nothing in it, and mkflags uses that).
) | ${CROSS_COMPILE}${CC} -E - | \
$SED -n -e 's/" *"//g;/^#/d;t clear;:clear;s/"/"/p;t;s/\( [AB] \).*/\1 " "/p'
# Sort resulting line pairs and glue them together into triplets of
# command "flags" "allflags"
# to feed into mkflags C program that outputs actual flag macros
# If no pair (because command's disabled in config), use " " for flags
# so allflags can define the appropriate zero macros.
done | sort -s | $SED -n -e 's/ A / /;t pair;h;s/\([^ ]*\).*/\1 " "/;x' \
-e 'b single;:pair;h;n;:single;s/[^ ]* B //;H;g;s/\n/ /;p' | \
tee generated/flags.raw | generated/mkflags > generated/flags.h || exit 1
}
if isnewer generated/flags.h toys "$KCONFIG_CONFIG"
then
echo -n "generated/flags.h "
make_flagsh
fi
# Extract global structure definitions and flag definitions from toys/*/*.c
function getglobals()
{
for i in toys/*/*.c
do
NAME="$(echo $i | $SED 's@.*/\(.*\)\.c@\1@')"
DATA="$($SED -n -e '/^GLOBALS(/,/^)/b got;b;:got' \
-e 's/^GLOBALS(/struct '"$NAME"'_data {/' \
-e 's/^)/};/' -e 'p' $i)"
[ ! -z "$DATA" ] && echo -e "// $i\n\n$DATA\n"
done
}
if isnewer generated/globals.h toys
then
echo -n "generated/globals.h "
GLOBSTRUCT="$(getglobals)"
(
echo "$GLOBSTRUCT"
echo
echo "extern union global_union {"
echo "$GLOBSTRUCT" | \
$SED -n 's/struct \(.*\)_data {/ struct \1_data \1;/p'
echo "} this;"
) > generated/globals.h
fi
if [ generated/mktags -ot scripts/mktags.c ]
then
do_loudly $HOSTCC scripts/mktags.c -o generated/mktags || exit 1
fi
if isnewer generated/tags.h toys
then
echo -n "generated/tags.h "
$SED -n '/TAGGED_ARRAY(/,/^)/{s/.*TAGGED_ARRAY[(]\([^,]*\),/\1/;p}' \
toys/*/*.c lib/*.c | generated/mktags > generated/tags.h
fi
if [ generated/config2help -ot scripts/config2help.c ]
then
do_loudly $HOSTCC scripts/config2help.c -I . lib/xwrap.c lib/llist.c \
lib/lib.c lib/portability.c -o generated/config2help || exit 1
fi
if isnewer generated/help.h generated/Config.in
then
echo "generated/help.h"
generated/config2help Config.in $KCONFIG_CONFIG > generated/help.h || exit 1
fi
[ ! -z "$NOBUILD" ] && exit 0
echo -n "Compile toybox"
[ ! -z "$V" ] && echo
DOTPROG=.
# This is a parallel version of: do_loudly $BUILD $FILES $LINK || exit 1
# Any headers newer than the oldest generated/obj file?
X="$(ls -1t generated/obj/* 2>/dev/null | tail -n 1)"
# TODO: redo this
if [ ! -e "$X" ] || [ ! -z "$(find toys -name "*.h" -newer "$X")" ]
then
rm -rf generated/obj && mkdir -p generated/obj || exit 1
else
rm -f generated/obj/{main,lib_help}.o || exit 1
fi
# build each generated/obj/*.o file in parallel
PENDING=
LNKFILES=
DONE=0
COUNT=0
CLICK=
for i in $LIBFILES click $TOYFILES
do
[ "$i" == click ] && CLICK=1 && continue
X=${i/lib\//lib_}
X=${X##*/}
OUT="generated/obj/${X%%.c}.o"
LNKFILES="$LNKFILES $OUT"
# $LIBFILES doesn't need to be rebuilt if newer than .config, $TOYFILES does
[ "$OUT" -nt "$i" ] && [ -z "$CLICK" -o "$OUT" -nt "$KCONFIG_CONFIG" ] &&
continue
do_loudly $BUILD -c $i -o $OUT &
PENDING="$PENDING $!"
COUNT=$(($COUNT+1))
# ratelimit to $CPUS many parallel jobs, detecting errors
for j in $PENDING
do
[ "$COUNT" -lt "$CPUS" ] && break;
wait $j
DONE=$(($DONE+$?))
COUNT=$(($COUNT-1))
PENDING="${PENDING## $j}"
done
[ $DONE -ne 0 ] && break
done
# wait for all background jobs, detecting errors
for i in $PENDING
do
wait $i
DONE=$(($DONE+$?))
done
[ $DONE -ne 0 ] && exit 1
do_loudly $BUILD $LNKFILES $LINK || exit 1
if [ ! -z "$NOSTRIP" ] ||
! do_loudly ${CROSS_COMPILE}strip "$UNSTRIPPED" -o "$OUTNAME"
then
echo "strip failed, using unstripped" && cp "$UNSTRIPPED" "$OUTNAME" ||
exit 1
fi
# gcc 4.4's strip command is buggy, and doesn't set the executable bit on
# its output the way SUSv4 suggests it do so. While we're at it, make sure
# we don't have the "w" bit set so things like bzip2's "cp -f" install don't
# overwrite our binary through the symlink.
do_loudly chmod 555 "$OUTNAME" || exit 1
echo