3 # Grab default values for $CFLAGS and such.
10 [ -z "$KCONFIG_CONFIG" ] && KCONFIG_CONFIG=.config
11 [ -z "$OUTNAME" ] && OUTNAME=toybox
12 UNSTRIPPED="generated/unstripped/$(basename "$OUTNAME")"
14 # Since each cc invocation is short, launch half again as many processes
15 # as we have processors so they don't exit faster than we can start them.
16 [ -z "$CPUS" ] && CPUS=$(($(nproc)+1))
20 [ ! -z "$(which gsed 2>/dev/null)" ] && SED=gsed || SED=sed
23 # Respond to V= by echoing command lines as well as running them
27 [ ! -z "$V" ] && echo "$@" || echo -n "$DOTPROG"
31 # Is anything under directory $2 newer than file $1
36 [ ! -z "$(find "$@" -newer "$CHECK" 2>/dev/null || echo yes)" ]
39 echo "Generate headers from toys/*/*.c..."
41 mkdir -p generated/unstripped
43 if isnewer generated/Config.in toys
45 echo "Extract configuration information from toys/*.c files..."
49 # Create a list of all the commands toybox can provide. Note that the first
50 # entry is out of order on purpose (the toybox multiplexer command must be the
51 # first element of the array). The rest must be sorted in alphabetical order
52 # for fast binary search.
54 if isnewer generated/newtoys.h toys
56 echo -n "generated/newtoys.h "
58 echo "USE_TOYBOX(NEWTOY(toybox, NULL, TOYFLAG_STAYROOT))" > generated/newtoys.h
59 $SED -n -e 's/^USE_[A-Z0-9_]*(/&/p' toys/*/*.c \
60 | $SED 's/\(.*TOY(\)\([^,]*\),\(.*\)/\2 \1\2,\3/' | sort -s -k 1,1 \
61 | $SED 's/[^ ]* //' >> generated/newtoys.h
62 [ $? -ne 0 ] && exit 1
65 [ ! -z "$V" ] && echo "Which C files to build..."
67 # Extract a list of toys/*/*.c files to compile from the data in $KCONFIG_CONFIG
68 # (First command names, then filenames with relevant {NEW,OLD}TOY() macro.)
70 GITHASH="$(git describe --tags --abbrev=12 2>/dev/null)"
71 [ ! -z "$GITHASH" ] && GITHASH="-DTOYBOX_VERSION=\"$GITHASH\""
72 TOYFILES="$($SED -n 's/^CONFIG_\([^=]*\)=.*/\1/p' "$KCONFIG_CONFIG" | xargs | tr ' [A-Z]' '|[a-z]')"
73 TOYFILES="$(egrep -l "TOY[(]($TOYFILES)[ ,]" toys/*/*.c)"
74 CFLAGS="$CFLAGS $(cat generated/cflags)"
75 BUILD="$(echo ${CROSS_COMPILE}${CC} $CFLAGS -I . $OPTIMIZE $GITHASH)"
76 LIBFILES="$(ls lib/*.c | grep -v lib/help.c)"
77 TOYFILES="lib/help.c main.c $TOYFILES"
79 if [ "${TOYFILES/pending//}" != "$TOYFILES" ]
81 echo -e "\n\033[1;31mwarning: using unfinished code from toys/pending\033[0m"
86 # Write a canned build line for use on crippled build machines.
92 echo "FILES='$LIBFILES $TOYFILES'"
97 echo '$BUILD $FILES $LINK'
100 if ! cmp -s <(genbuildsh | head -n 3) \
101 <(head -n 3 generated/build.sh 2>/dev/null)
103 echo -n "Library probe"
105 # We trust --as-needed to remove each library if we don't use any symbols
106 # out of it, this loop is because the compiler has no way to ignore a library
107 # that doesn't exist, so we have to detect and skip nonexistent libraries
110 > generated/optlibs.dat
111 for i in util crypt m resolv selinux smack attr rt crypto z log
113 echo "int main(int argc, char *argv[]) {return 0;}" | \
114 ${CROSS_COMPILE}${CC} $CFLAGS -xc - -o generated/libprobe -Wl,--as-needed -l$i > /dev/null 2>/dev/null &&
115 echo -l$i >> generated/optlibs.dat
118 rm -f generated/libprobe
122 # LINK needs optlibs.dat, above
124 LINK="$(echo $LDOPTIMIZE $LDFLAGS -o "$UNSTRIPPED" -Wl,--as-needed $(cat generated/optlibs.dat))"
125 genbuildsh > generated/build.sh && chmod +x generated/build.sh || exit 1
127 #TODO: "make $SED && make" doesn't regenerate config.h because diff .config
128 if true #isnewer generated/config.h "$KCONFIG_CONFIG"
130 echo "Make generated/config.h from $KCONFIG_CONFIG."
132 # This long and roundabout sed invocation is to make old versions of sed
133 # happy. New ones have '\n' so can replace one line with two without all
134 # the branches and tedious mucking about with hold space.
137 -e 's/^# CONFIG_\(.*\) is not set.*/\1/' \
139 -e 's/^CONFIG_\(.*\)=y.*/\1/' \
141 -e 's/^CONFIG_\([^=]*\)=\(.*\)/#define CFG_\1 \2/p' \
145 -e 's/.*/#define CFG_& 0/p' \
147 -e 's/.*/#define USE_&(...)/p' \
151 -e 's/.*/#define CFG_& 1/p' \
153 -e 's/.*/#define USE_&(...) __VA_ARGS__/p' \
154 $KCONFIG_CONFIG > generated/config.h || exit 1
157 if [ generated/mkflags -ot scripts/mkflags.c ]
159 do_loudly $HOSTCC scripts/mkflags.c -o generated/mkflags || exit 1
162 # Process config.h and newtoys.h to generate FLAG_x macros. Note we must
163 # always #define the relevant macro, even when it's disabled, because we
164 # allow multiple NEWTOY() in the same C file. (When disabled the FLAG is 0,
165 # so flags&0 becomes a constant 0 allowing dead code elimination.)
169 # Parse files through C preprocessor twice, once to get flags for current
170 # .config and once to get flags for allyesconfig
174 # define macros and select header files with option string data
176 echo "#define NEWTOY(aa,bb,cc) aa $I bb"
177 echo '#define OLDTOY(...)'
180 cat generated/config.h
182 $SED '/USE_.*([^)]*)$/s/$/ __VA_ARGS__/' generated/config.h
184 echo '#include "lib/toyflags.h"'
185 cat generated/newtoys.h
187 # Run result through preprocessor, glue together " " gaps leftover from USE
188 # macros, delete comment lines, print any line with a quoted optstring,
189 # turn any non-quoted opstring (NULL or 0) into " " (because fscanf can't
190 # handle "" with nothing in it, and mkflags uses that).
192 ) | ${CROSS_COMPILE}${CC} -E - | \
193 $SED -n -e 's/" *"//g;/^#/d;t clear;:clear;s/"/"/p;t;s/\( [AB] \).*/\1 " "/p'
195 # Sort resulting line pairs and glue them together into triplets of
196 # command "flags" "allflags"
197 # to feed into mkflags C program that outputs actual flag macros
198 # If no pair (because command's disabled in config), use " " for flags
199 # so allflags can define the appropriate zero macros.
201 done | sort -s | $SED -n -e 's/ A / /;t pair;h;s/\([^ ]*\).*/\1 " "/;x' \
202 -e 'b single;:pair;h;n;:single;s/[^ ]* B //;H;g;s/\n/ /;p' | \
203 tee generated/flags.raw | generated/mkflags > generated/flags.h || exit 1
206 if isnewer generated/flags.h toys "$KCONFIG_CONFIG"
208 echo -n "generated/flags.h "
212 # Extract global structure definitions and flag definitions from toys/*/*.c
214 function getglobals()
218 NAME="$(echo $i | $SED 's@.*/\(.*\)\.c@\1@')"
219 DATA="$($SED -n -e '/^GLOBALS(/,/^)/b got;b;:got' \
220 -e 's/^GLOBALS(/struct '"$NAME"'_data {/' \
221 -e 's/^)/};/' -e 'p' $i)"
223 [ ! -z "$DATA" ] && echo -e "// $i\n\n$DATA\n"
227 if isnewer generated/globals.h toys
229 echo -n "generated/globals.h "
230 GLOBSTRUCT="$(getglobals)"
234 echo "extern union global_union {"
235 echo "$GLOBSTRUCT" | \
236 $SED -n 's/struct \(.*\)_data {/ struct \1_data \1;/p'
238 ) > generated/globals.h
241 if [ generated/mktags -ot scripts/mktags.c ]
243 do_loudly $HOSTCC scripts/mktags.c -o generated/mktags || exit 1
246 if isnewer generated/tags.h toys
248 echo -n "generated/tags.h "
250 $SED -n '/TAGGED_ARRAY(/,/^)/{s/.*TAGGED_ARRAY[(]\([^,]*\),/\1/;p}' \
251 toys/*/*.c lib/*.c | generated/mktags > generated/tags.h
254 if [ generated/config2help -ot scripts/config2help.c ]
256 do_loudly $HOSTCC scripts/config2help.c -I . lib/xwrap.c lib/llist.c \
257 lib/lib.c lib/portability.c -o generated/config2help || exit 1
259 if isnewer generated/help.h generated/Config.in
261 echo "generated/help.h"
262 generated/config2help Config.in $KCONFIG_CONFIG > generated/help.h || exit 1
265 [ ! -z "$NOBUILD" ] && exit 0
267 echo -n "Compile toybox"
268 [ ! -z "$V" ] && echo
271 # This is a parallel version of: do_loudly $BUILD $FILES $LINK || exit 1
273 # Any headers newer than the oldest generated/obj file?
274 X="$(ls -1t generated/obj/* 2>/dev/null | tail -n 1)"
276 if [ ! -e "$X" ] || [ ! -z "$(find toys -name "*.h" -newer "$X")" ]
278 rm -rf generated/obj && mkdir -p generated/obj || exit 1
280 rm -f generated/obj/{main,lib_help}.o || exit 1
283 # build each generated/obj/*.o file in parallel
291 for i in $LIBFILES click $TOYFILES
293 [ "$i" == click ] && CLICK=1 && continue
297 OUT="generated/obj/${X%%.c}.o"
298 LNKFILES="$LNKFILES $OUT"
300 # $LIBFILES doesn't need to be rebuilt if newer than .config, $TOYFILES does
302 [ "$OUT" -nt "$i" ] && [ -z "$CLICK" -o "$OUT" -nt "$KCONFIG_CONFIG" ] &&
305 do_loudly $BUILD -c $i -o $OUT &
306 PENDING="$PENDING $!"
309 # ratelimit to $CPUS many parallel jobs, detecting errors
313 [ "$COUNT" -lt "$CPUS" ] && break;
318 PENDING="${PENDING## $j}"
320 [ $DONE -ne 0 ] && break
323 # wait for all background jobs, detecting errors
331 [ $DONE -ne 0 ] && exit 1
333 do_loudly $BUILD $LNKFILES $LINK || exit 1
334 if [ ! -z "$NOSTRIP" ] ||
335 ! do_loudly ${CROSS_COMPILE}strip "$UNSTRIPPED" -o "$OUTNAME"
337 echo "strip failed, using unstripped" && cp "$UNSTRIPPED" "$OUTNAME" ||
341 # gcc 4.4's strip command is buggy, and doesn't set the executable bit on
342 # its output the way SUSv4 suggests it do so. While we're at it, make sure
343 # we don't have the "w" bit set so things like bzip2's "cp -f" install don't
344 # overwrite our binary through the symlink.
345 do_loudly chmod 555 "$OUTNAME" || exit 1