1#!/bin/bash 2 3# Grab default values for $CFLAGS and such. 4 5export LANG=c 6export LC_ALL=C 7set -o pipefail 8source ./configure 9 10[ ! -z "$CROSS_COMPILE" ] && [ ! -e "$CROSS_COMPILE"cc ] && 11 echo "missing ${CROSS_COMPILE}cc" && exit 1 12 13[ -z "$KCONFIG_CONFIG" ] && KCONFIG_CONFIG=.config 14[ -z "$OUTNAME" ] && OUTNAME=toybox 15UNSTRIPPED="generated/unstripped/$(basename "$OUTNAME")" 16 17# Try to keep one more cc invocation going than we have processors 18[ -z "$CPUS" ] && CPUS=$(($(nproc)+1)) 19 20if [ -z "$SED" ] 21then 22 [ ! -z "$(which gsed 2>/dev/null)" ] && SED=gsed || SED=sed 23fi 24 25# Respond to V= by echoing command lines as well as running them 26DOTPROG= 27do_loudly() 28{ 29 [ ! -z "$V" ] && echo "$@" || echo -n "$DOTPROG" 30 "$@" 31} 32 33# Is anything under directory $2 newer than file $1 34isnewer() 35{ 36 CHECK="$1" 37 shift 38 [ ! -z "$(find "$@" -newer "$CHECK" 2>/dev/null || echo yes)" ] 39} 40 41echo "Generate headers from toys/*/*.c..." 42 43mkdir -p generated/unstripped 44 45if isnewer generated/Config.in toys 46then 47 echo "Extract configuration information from toys/*.c files..." 48 scripts/genconfig.sh 49fi 50 51# Create a list of all the commands toybox can provide. Note that the first 52# entry is out of order on purpose (the toybox multiplexer command must be the 53# first element of the array). The rest must be sorted in alphabetical order 54# for fast binary search. 55 56if isnewer generated/newtoys.h toys 57then 58 echo -n "generated/newtoys.h " 59 60 echo "USE_TOYBOX(NEWTOY(toybox, NULL, TOYFLAG_STAYROOT))" > generated/newtoys.h 61 $SED -n -e 's/^USE_[A-Z0-9_]*(/&/p' toys/*/*.c \ 62 | $SED 's/\(.*TOY(\)\([^,]*\),\(.*\)/\2 \1\2,\3/' | sort -s -k 1,1 \ 63 | $SED 's/[^ ]* //' >> generated/newtoys.h 64 [ $? -ne 0 ] && exit 1 65fi 66 67[ ! -z "$V" ] && echo "Which C files to build..." 68 69# Extract a list of toys/*/*.c files to compile from the data in $KCONFIG_CONFIG 70# (First command names, then filenames with relevant {NEW,OLD}TOY() macro.) 71 72[ -d ".git" ] && GITHASH="$(git describe --tags --abbrev=12 2>/dev/null)" 73[ ! -z "$GITHASH" ] && GITHASH="-DTOYBOX_VERSION=\"$GITHASH\"" 74TOYFILES="$($SED -n 's/^CONFIG_\([^=]*\)=.*/\1/p' "$KCONFIG_CONFIG" | xargs | tr ' [A-Z]' '|[a-z]')" 75TOYFILES="$(egrep -l "TOY[(]($TOYFILES)[ ,]" toys/*/*.c)" 76CFLAGS="$CFLAGS $(cat generated/cflags)" 77BUILD="$(echo ${CROSS_COMPILE}${CC} $CFLAGS -I . $OPTIMIZE $GITHASH)" 78LIBFILES="$(ls lib/*.c | grep -v lib/help.c)" 79TOYFILES="lib/help.c main.c $TOYFILES" 80 81if [ "${TOYFILES/pending//}" != "$TOYFILES" ] 82then 83 echo -e "\n\033[1;31mwarning: using unfinished code from toys/pending\033[0m" 84fi 85 86genbuildsh() 87{ 88 # Write a canned build line for use on crippled build machines. 89 90 echo "#!/bin/sh" 91 echo 92 echo "PATH='$PATH'" 93 echo 94 echo "BUILD='$BUILD'" 95 echo 96 echo "LINK='$LINK'" 97 echo 98 echo "FILES='$LIBFILES $TOYFILES'" 99 echo 100 echo 101 echo '$BUILD $FILES $LINK' 102} 103 104if ! cmp -s <(genbuildsh | head -n 6 ; echo LINK="'"$LDOPTIMIZE $LDFLAGS) \ 105 <(head -n 7 generated/build.sh 2>/dev/null | sed '7s/ -o .*//') 106then 107 echo -n "Library probe" 108 109 # We trust --as-needed to remove each library if we don't use any symbols 110 # out of it, this loop is because the compiler has no way to ignore a library 111 # that doesn't exist, so we have to detect and skip nonexistent libraries 112 # for it. 113 114 > generated/optlibs.dat 115 for i in util crypt m resolv selinux smack attr rt crypto z log 116 do 117 echo "int main(int argc, char *argv[]) {return 0;}" | \ 118 ${CROSS_COMPILE}${CC} $CFLAGS $LDFLAGS -xc - -o generated/libprobe -Wl,--as-needed -l$i > /dev/null 2>/dev/null && 119 echo -l$i >> generated/optlibs.dat 120 echo -n . 121 done 122 rm -f generated/libprobe 123 echo 124fi 125 126# LINK needs optlibs.dat, above 127 128LINK="$(echo $LDOPTIMIZE $LDFLAGS -o "$UNSTRIPPED" -Wl,--as-needed $(cat generated/optlibs.dat))" 129genbuildsh > generated/build.sh && chmod +x generated/build.sh || exit 1 130 131#TODO: "make $SED && make" doesn't regenerate config.h because diff .config 132if true #isnewer generated/config.h "$KCONFIG_CONFIG" 133then 134 echo "Make generated/config.h from $KCONFIG_CONFIG." 135 136 # This long and roundabout sed invocation is to make old versions of sed 137 # happy. New ones have '\n' so can replace one line with two without all 138 # the branches and tedious mucking about with hold space. 139 140 $SED -n \ 141 -e 's/^# CONFIG_\(.*\) is not set.*/\1/' \ 142 -e 't notset' \ 143 -e 's/^CONFIG_\(.*\)=y.*/\1/' \ 144 -e 't isset' \ 145 -e 's/^CONFIG_\([^=]*\)=\(.*\)/#define CFG_\1 \2/p' \ 146 -e 'd' \ 147 -e ':notset' \ 148 -e 'h' \ 149 -e 's/.*/#define CFG_& 0/p' \ 150 -e 'g' \ 151 -e 's/.*/#define USE_&(...)/p' \ 152 -e 'd' \ 153 -e ':isset' \ 154 -e 'h' \ 155 -e 's/.*/#define CFG_& 1/p' \ 156 -e 'g' \ 157 -e 's/.*/#define USE_&(...) __VA_ARGS__/p' \ 158 $KCONFIG_CONFIG > generated/config.h || exit 1 159fi 160 161if [ generated/mkflags -ot scripts/mkflags.c ] 162then 163 do_loudly $HOSTCC scripts/mkflags.c -o generated/mkflags || exit 1 164fi 165 166# Process config.h and newtoys.h to generate FLAG_x macros. Note we must 167# always #define the relevant macro, even when it's disabled, because we 168# allow multiple NEWTOY() in the same C file. (When disabled the FLAG is 0, 169# so flags&0 becomes a constant 0 allowing dead code elimination.) 170 171make_flagsh() 172{ 173 # Parse files through C preprocessor twice, once to get flags for current 174 # .config and once to get flags for allyesconfig 175 for I in A B 176 do 177 ( 178 # define macros and select header files with option string data 179 180 echo "#define NEWTOY(aa,bb,cc) aa $I bb" 181 echo '#define OLDTOY(...)' 182 if [ "$I" == A ] 183 then 184 cat generated/config.h 185 else 186 $SED '/USE_.*([^)]*)$/s/$/ __VA_ARGS__/' generated/config.h 187 fi 188 echo '#include "lib/toyflags.h"' 189 cat generated/newtoys.h 190 191 # Run result through preprocessor, glue together " " gaps leftover from USE 192 # macros, delete comment lines, print any line with a quoted optstring, 193 # turn any non-quoted opstring (NULL or 0) into " " (because fscanf can't 194 # handle "" with nothing in it, and mkflags uses that). 195 196 ) | ${CROSS_COMPILE}${CC} -E - | \ 197 $SED -n -e 's/" *"//g;/^#/d;t clear;:clear;s/"/"/p;t;s/\( [AB] \).*/\1 " "/p' 198 199 # Sort resulting line pairs and glue them together into triplets of 200 # command "flags" "allflags" 201 # to feed into mkflags C program that outputs actual flag macros 202 # If no pair (because command's disabled in config), use " " for flags 203 # so allflags can define the appropriate zero macros. 204 205 done | sort -s | $SED -n -e 's/ A / /;t pair;h;s/\([^ ]*\).*/\1 " "/;x' \ 206 -e 'b single;:pair;h;n;:single;s/[^ ]* B //;H;g;s/\n/ /;p' | \ 207 tee generated/flags.raw | generated/mkflags > generated/flags.h || exit 1 208} 209 210if isnewer generated/flags.h toys "$KCONFIG_CONFIG" 211then 212 echo -n "generated/flags.h " 213 make_flagsh 214fi 215 216# Extract global structure definitions and flag definitions from toys/*/*.c 217 218function getglobals() 219{ 220 for i in toys/*/*.c 221 do 222 NAME="$(echo $i | $SED 's@.*/\(.*\)\.c@\1@')" 223 DATA="$($SED -n -e '/^GLOBALS(/,/^)/b got;b;:got' \ 224 -e 's/^GLOBALS(/struct '"$NAME"'_data {/' \ 225 -e 's/^)/};/' -e 'p' $i)" 226 227 [ ! -z "$DATA" ] && echo -e "// $i\n\n$DATA\n" 228 done 229} 230 231if isnewer generated/globals.h toys 232then 233 echo -n "generated/globals.h " 234 GLOBSTRUCT="$(getglobals)" 235 ( 236 echo "$GLOBSTRUCT" 237 echo 238 echo "extern union global_union {" 239 echo "$GLOBSTRUCT" | \ 240 $SED -n 's/struct \(.*\)_data {/ struct \1_data \1;/p' 241 echo "} this;" 242 ) > generated/globals.h 243fi 244 245if [ generated/mktags -ot scripts/mktags.c ] 246then 247 do_loudly $HOSTCC scripts/mktags.c -o generated/mktags || exit 1 248fi 249 250if isnewer generated/tags.h toys 251then 252 echo -n "generated/tags.h " 253 254 $SED -n '/TAGGED_ARRAY(/,/^)/{s/.*TAGGED_ARRAY[(]\([^,]*\),/\1/;p}' \ 255 toys/*/*.c lib/*.c | generated/mktags > generated/tags.h 256fi 257 258if [ generated/config2help -ot scripts/config2help.c ] 259then 260 do_loudly $HOSTCC scripts/config2help.c -o generated/config2help || exit 1 261fi 262if isnewer generated/help.h generated/Config.in 263then 264 echo "generated/help.h" 265 generated/config2help Config.in $KCONFIG_CONFIG > generated/help.h || exit 1 266fi 267 268[ ! -z "$NOBUILD" ] && exit 0 269 270echo -n "Compile toybox" 271[ ! -z "$V" ] && echo 272DOTPROG=. 273 274# This is a parallel version of: do_loudly $BUILD $FILES $LINK || exit 1 275 276# Any headers newer than the oldest generated/obj file? 277X="$(ls -1t generated/obj/* 2>/dev/null | tail -n 1)" 278# TODO: redo this 279if [ ! -e "$X" ] || [ ! -z "$(find toys -name "*.h" -newer "$X")" ] 280then 281 rm -rf generated/obj && mkdir -p generated/obj || exit 1 282else 283 rm -f generated/obj/{main,lib_help}.o || exit 1 284fi 285 286# build each generated/obj/*.o file in parallel 287 288PENDING= 289LNKFILES= 290DONE=0 291COUNT=0 292CLICK= 293 294for i in $LIBFILES click $TOYFILES 295do 296 [ "$i" == click ] && CLICK=1 && continue 297 298 X=${i/lib\//lib_} 299 X=${X##*/} 300 OUT="generated/obj/${X%%.c}.o" 301 LNKFILES="$LNKFILES $OUT" 302 303 # $LIBFILES doesn't need to be rebuilt if newer than .config, $TOYFILES does 304 305 [ "$OUT" -nt "$i" ] && [ -z "$CLICK" -o "$OUT" -nt "$KCONFIG_CONFIG" ] && 306 continue 307 308 do_loudly $BUILD -c $i -o $OUT & 309 PENDING="$PENDING $!" 310 COUNT=$(($COUNT+1)) 311 312 # ratelimit to $CPUS many parallel jobs, detecting errors 313 314 for j in $PENDING 315 do 316 [ "$COUNT" -lt "$CPUS" ] && break; 317 318 wait $j 319 DONE=$(($DONE+$?)) 320 COUNT=$(($COUNT-1)) 321 PENDING="${PENDING## $j}" 322 done 323 [ $DONE -ne 0 ] && break 324done 325 326# wait for all background jobs, detecting errors 327 328for i in $PENDING 329do 330 wait $i 331 DONE=$(($DONE+$?)) 332done 333 334[ $DONE -ne 0 ] && exit 1 335 336do_loudly $BUILD $LNKFILES $LINK || exit 1 337if [ ! -z "$NOSTRIP" ] || 338 ! do_loudly ${CROSS_COMPILE}${STRIP} "$UNSTRIPPED" -o "$OUTNAME" 339then 340 echo "strip failed, using unstripped" && 341 rm -f "$OUTNAME" && 342 cp "$UNSTRIPPED" "$OUTNAME" || 343 exit 1 344fi 345 346# gcc 4.4's strip command is buggy, and doesn't set the executable bit on 347# its output the way SUSv4 suggests it do so. While we're at it, make sure 348# we don't have the "w" bit set so things like bzip2's "cp -f" install don't 349# overwrite our binary through the symlink. 350do_loudly chmod 555 "$OUTNAME" || exit 1 351 352echo 353