1 #!/bin/bash 2 3 # Grab default values for $CFLAGS and such. 4 5 export LANG=c 6 export LC_ALL=C 7 set -o pipefail 8 source ./configure 9 10 [ -z "$KCONFIG_CONFIG" ] && KCONFIG_CONFIG=.config 11 [ -z "$OUTNAME" ] && OUTNAME=toybox 12 UNSTRIPPED="generated/unstripped/$(basename "$OUTNAME")" 13 14 # Since each cc invocation is short, launch half again as many processes 15 # as we have processors so they don't exit faster than we can start them. 16 [ -z "$CPUS" ] && CPUS=$(($(nproc)+1)) 17 18 if [ -z "$SED" ] 19 then 20 [ ! -z "$(which gsed 2>/dev/null)" ] && SED=gsed || SED=sed 21 fi 22 23 # Respond to V= by echoing command lines as well as running them 24 DOTPROG= 25 do_loudly() 26 { 27 [ ! -z "$V" ] && echo "$@" || echo -n "$DOTPROG" 28 "$@" 29 } 30 31 # Is anything under directory $2 newer than file $1 32 isnewer() 33 { 34 CHECK="$1" 35 shift 36 [ ! -z "$(find "$@" -newer "$CHECK" 2>/dev/null || echo yes)" ] 37 } 38 39 echo "Generate headers from toys/*/*.c..." 40 41 mkdir -p generated/unstripped 42 43 if isnewer generated/Config.in toys 44 then 45 echo "Extract configuration information from toys/*.c files..." 46 scripts/genconfig.sh 47 fi 48 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. 53 54 if isnewer generated/newtoys.h toys 55 then 56 echo -n "generated/newtoys.h " 57 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 [ $? -ne 0 ] && exit 1 63 fi 64 65 [ ! -z "$V" ] && echo "Which C files to build..." 66 67 # Extract a list of toys/*/*.c files to compile from the data in $KCONFIG_CONFIG 68 # (First command names, then filenames with relevant {NEW,OLD}TOY() macro.) 69 70 [ -d ".git" ] && GITHASH="$(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 $TOYFILES" 78 79 if [ "${TOYFILES/pending//}" != "$TOYFILES" ] 80 then 81 echo -e "\n\033[1;31mwarning: using unfinished code from toys/pending\033[0m" 82 fi 83 84 genbuildsh() 85 { 86 # Write a canned build line for use on crippled build machines. 87 88 echo "#!/bin/sh" 89 echo 90 echo "BUILD='$BUILD'" 91 echo 92 echo "FILES='$LIBFILES $TOYFILES'" 93 echo 94 echo "LINK='$LINK'" 95 echo 96 echo 97 echo '$BUILD $FILES $LINK' 98 } 99 100 if ! cmp -s <(genbuildsh | head -n 3) \ 101 <(head -n 3 generated/build.sh 2>/dev/null) 102 then 103 echo -n "Library probe" 104 105 # 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 108 # for it. 109 110 > generated/optlibs.dat 111 for i in util crypt m resolv selinux smack attr rt crypto z log 112 do 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$i >> generated/optlibs.dat 116 echo -n . 117 done 118 rm -f generated/libprobe 119 echo 120 fi 121 122 # LINK needs optlibs.dat, above 123 124 LINK="$(echo $LDOPTIMIZE $LDFLAGS -o "$UNSTRIPPED" -Wl,--as-needed $(cat generated/optlibs.dat))" 125 genbuildsh > generated/build.sh && chmod +x generated/build.sh || exit 1 126 127 #TODO: "make $SED && make" doesn't regenerate config.h because diff .config 128 if true #isnewer generated/config.h "$KCONFIG_CONFIG" 129 then 130 echo "Make generated/config.h from $KCONFIG_CONFIG." 131 132 # 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. 135 136 $SED -n \ 137 -e 's/^# CONFIG_\(.*\) is not set.*/\1/' \ 138 -e 't notset' \ 139 -e 's/^CONFIG_\(.*\)=y.*/\1/' \ 140 -e 't isset' \ 141 -e 's/^CONFIG_\([^=]*\)=\(.*\)/#define CFG_\1 \2/p' \ 142 -e 'd' \ 143 -e ':notset' \ 144 -e 'h' \ 145 -e 's/.*/#define CFG_& 0/p' \ 146 -e 'g' \ 147 -e 's/.*/#define USE_&(...)/p' \ 148 -e 'd' \ 149 -e ':isset' \ 150 -e 'h' \ 151 -e 's/.*/#define CFG_& 1/p' \ 152 -e 'g' \ 153 -e 's/.*/#define USE_&(...) __VA_ARGS__/p' \ 154 $KCONFIG_CONFIG > generated/config.h || exit 1 155 fi 156 157 if [ generated/mkflags -ot scripts/mkflags.c ] 158 then 159 do_loudly $HOSTCC scripts/mkflags.c -o generated/mkflags || exit 1 160 fi 161 162 # 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.) 166 167 make_flagsh() 168 { 169 # Parse files through C preprocessor twice, once to get flags for current 170 # .config and once to get flags for allyesconfig 171 for I in A B 172 do 173 ( 174 # define macros and select header files with option string data 175 176 echo "#define NEWTOY(aa,bb,cc) aa $I bb" 177 echo '#define OLDTOY(...)' 178 if [ "$I" == A ] 179 then 180 cat generated/config.h 181 else 182 $SED '/USE_.*([^)]*)$/s/$/ __VA_ARGS__/' generated/config.h 183 fi 184 echo '#include "lib/toyflags.h"' 185 cat generated/newtoys.h 186 187 # 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). 191 192 ) | ${CROSS_COMPILE}${CC} -E - | \ 193 $SED -n -e 's/" *"//g;/^#/d;t clear;:clear;s/"/"/p;t;s/\( [AB] \).*/\1 " "/p' 194 195 # 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. 200 201 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 1 204 } 205 206 if isnewer generated/flags.h toys "$KCONFIG_CONFIG" 207 then 208 echo -n "generated/flags.h " 209 make_flagsh 210 fi 211 212 # Extract global structure definitions and flag definitions from toys/*/*.c 213 214 function getglobals() 215 { 216 for i in toys/*/*.c 217 do 218 NAME="$(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' $i)" 222 223 [ ! -z "$DATA" ] && echo -e "// $i\n\n$DATA\n" 224 done 225 } 226 227 if isnewer generated/globals.h toys 228 then 229 echo -n "generated/globals.h " 230 GLOBSTRUCT="$(getglobals)" 231 ( 232 echo "$GLOBSTRUCT" 233 echo 234 echo "extern union global_union {" 235 echo "$GLOBSTRUCT" | \ 236 $SED -n 's/struct \(.*\)_data {/ struct \1_data \1;/p' 237 echo "} this;" 238 ) > generated/globals.h 239 fi 240 241 if [ generated/mktags -ot scripts/mktags.c ] 242 then 243 do_loudly $HOSTCC scripts/mktags.c -o generated/mktags || exit 1 244 fi 245 246 if isnewer generated/tags.h toys 247 then 248 echo -n "generated/tags.h " 249 250 $SED -n '/TAGGED_ARRAY(/,/^)/{s/.*TAGGED_ARRAY[(]\([^,]*\),/\1/;p}' \ 251 toys/*/*.c lib/*.c | generated/mktags > generated/tags.h 252 fi 253 254 if [ generated/config2help -ot scripts/config2help.c ] 255 then 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 1 258 fi 259 if isnewer generated/help.h generated/Config.in 260 then 261 echo "generated/help.h" 262 generated/config2help Config.in $KCONFIG_CONFIG > generated/help.h || exit 1 263 fi 264 265 [ ! -z "$NOBUILD" ] && exit 0 266 267 echo -n "Compile toybox" 268 [ ! -z "$V" ] && echo 269 DOTPROG=. 270 271 # This is a parallel version of: do_loudly $BUILD $FILES $LINK || exit 1 272 273 # Any headers newer than the oldest generated/obj file? 274 X="$(ls -1t generated/obj/* 2>/dev/null | tail -n 1)" 275 # TODO: redo this 276 if [ ! -e "$X" ] || [ ! -z "$(find toys -name "*.h" -newer "$X")" ] 277 then 278 rm -rf generated/obj && mkdir -p generated/obj || exit 1 279 else 280 rm -f generated/obj/{main,lib_help}.o || exit 1 281 fi 282 283 # build each generated/obj/*.o file in parallel 284 285 PENDING= 286 LNKFILES= 287 DONE=0 288 COUNT=0 289 CLICK= 290 291 for i in $LIBFILES click $TOYFILES 292 do 293 [ "$i" == click ] && CLICK=1 && continue 294 295 X=${i/lib\//lib_} 296 X=${X##*/} 297 OUT="generated/obj/${X%%.c}.o" 298 LNKFILES="$LNKFILES $OUT" 299 300 # $LIBFILES doesn't need to be rebuilt if newer than .config, $TOYFILES does 301 302 [ "$OUT" -nt "$i" ] && [ -z "$CLICK" -o "$OUT" -nt "$KCONFIG_CONFIG" ] && 303 continue 304 305 do_loudly $BUILD -c $i -o $OUT & 306 PENDING="$PENDING $!" 307 COUNT=$(($COUNT+1)) 308 309 # ratelimit to $CPUS many parallel jobs, detecting errors 310 311 for j in $PENDING 312 do 313 [ "$COUNT" -lt "$CPUS" ] && break; 314 315 wait $j 316 DONE=$(($DONE+$?)) 317 COUNT=$(($COUNT-1)) 318 PENDING="${PENDING## $j}" 319 done 320 [ $DONE -ne 0 ] && break 321 done 322 323 # wait for all background jobs, detecting errors 324 325 for i in $PENDING 326 do 327 wait $i 328 DONE=$(($DONE+$?)) 329 done 330 331 [ $DONE -ne 0 ] && exit 1 332 333 do_loudly $BUILD $LNKFILES $LINK || exit 1 334 if [ ! -z "$NOSTRIP" ] || 335 ! do_loudly ${CROSS_COMPILE}strip "$UNSTRIPPED" -o "$OUTNAME" 336 then 337 echo "strip failed, using unstripped" && cp "$UNSTRIPPED" "$OUTNAME" || 338 exit 1 339 fi 340 341 # gcc 4.4's strip command is buggy, and doesn't set the executable bit on 342 # its output the way SUSv4 suggests it do so. While we're at it, make sure 343 # we don't have the "w" bit set so things like bzip2's "cp -f" install don't 344 # overwrite our binary through the symlink. 345 do_loudly chmod 555 "$OUTNAME" || exit 1 346 347 echo 348
