1#!/bin/bash 2 3# Grab default values for $CFLAGS and such. 4 5if [ ! -z "$ASAN" ]; then 6 echo "Enabling ASan..." 7 # Turn ASan on. Everything except -fsanitize=address is optional, but 8 # but effectively required for useful backtraces. 9 asan_flags="-fsanitize=address \ 10 -O1 -g -fno-omit-frame-pointer -fno-optimize-sibling-calls" 11 CFLAGS="$asan_flags $CFLAGS" 12 HOSTCC="$HOSTCC $asan_flags" 13 # Ignore leaks on exit. TODO 14 export ASAN_OPTIONS="detect_leaks=0" 15fi 16 17# Centos 7 bug workaround, EOL June 30 2024. 18DASHN=-n; wait -n 2>/dev/null; [ $? -eq 2 ] && unset DASHN 19 20export LANG=c 21export LC_ALL=C 22set -o pipefail 23source scripts/portability.sh 24 25[ -z "$KCONFIG_CONFIG" ] && KCONFIG_CONFIG=.config 26[ -z "$OUTNAME" ] && OUTNAME=toybox"${TARGET:+-$TARGET}" 27UNSTRIPPED="generated/unstripped/$(basename "$OUTNAME")" 28 29# Default to running one more parallel cc instance than we have processors 30: ${CPUS:=$(($(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null)+1))} 31 32# Respond to V= by echoing command lines as well as running them 33DOTPROG= 34do_loudly() 35{ 36 [ ! -z "$V" ] && echo "$@" || echo -n "$DOTPROG" 37 "$@" 38} 39 40# Is anything under directory $2 newer than file $1 41isnewer() 42{ 43 CHECK="$1" 44 shift 45 [ ! -z "$(find "$@" -newer "$CHECK" 2>/dev/null || echo yes)" ] 46} 47 48echo "Generate headers from toys/*/*.c..." 49 50mkdir -p generated/unstripped 51 52if isnewer generated/Config.in toys || isnewer generated/Config.in Config.in 53then 54 echo "Extract configuration information from toys/*.c files..." 55 scripts/genconfig.sh 56fi 57 58# Create a list of all the commands toybox can provide. Note that the first 59# entry is out of order on purpose (the toybox multiplexer command must be the 60# first element of the array). The rest must be sorted in alphabetical order 61# for fast binary search. 62 63if isnewer generated/newtoys.h toys 64then 65 echo -n "generated/newtoys.h " 66 67 echo "USE_TOYBOX(NEWTOY(toybox, NULL, TOYFLAG_STAYROOT))" > generated/newtoys.h 68 $SED -n -e 's/^USE_[A-Z0-9_]*(/&/p' toys/*/*.c \ 69 | $SED 's/\(.*TOY(\)\([^,]*\),\(.*\)/\2 \1\2,\3/' | sort -s -k 1,1 \ 70 | $SED 's/[^ ]* //' >> generated/newtoys.h 71 [ $? -ne 0 ] && exit 1 72fi 73 74[ ! -z "$V" ] && echo "Which C files to build..." 75 76# Extract a list of toys/*/*.c files to compile from the data in $KCONFIG_CONFIG 77# (First command names, then filenames with relevant {NEW,OLD}TOY() macro.) 78 79[ -d ".git" ] && GITHASH="$(git describe --tags --abbrev=12 2>/dev/null)" 80[ ! -z "$GITHASH" ] && GITHASH="-DTOYBOX_VERSION=\"$GITHASH\"" 81TOYFILES="$($SED -n 's/^CONFIG_\([^=]*\)=.*/\1/p' "$KCONFIG_CONFIG" | xargs | tr ' [A-Z]' '|[a-z]')" 82TOYFILES="$(egrep -l "TOY[(]($TOYFILES)[ ,]" toys/*/*.c)" 83CFLAGS="$CFLAGS $(cat generated/cflags)" 84BUILD="$(echo ${CROSS_COMPILE}${CC} $CFLAGS -I . $OPTIMIZE $GITHASH)" 85LIBFILES="$(ls lib/*.c | grep -v lib/help.c)" 86TOYFILES="lib/help.c main.c $TOYFILES" 87 88if [ "${TOYFILES/pending//}" != "$TOYFILES" ] 89then 90 echo -e "\n\033[1;31mwarning: using unfinished code from toys/pending\033[0m" 91fi 92 93genbuildsh() 94{ 95 # Write a canned build line for use on crippled build machines. 96 97 echo -e "#!/bin/sh\n\nPATH='\$PATH'\n\nBUILD='\$BUILD'\n\nLINK='\$LINK'\n" 98 echo -e "FILES='$LIBFILES $TOYFILES'\n\n\$BUILD \$FILES \$LINK" 99} 100 101if ! cmp -s <(genbuildsh 2>/dev/null | head -n 6 ; echo LINK="'"$LDOPTIMIZE $LDFLAGS) \ 102 <(head -n 7 generated/build.sh 2>/dev/null | $SED '7s/ -o .*//') 103then 104 echo -n "Library probe" 105 106 # --as-needed removes libraries we don't use any symbols out of, but the 107 # compiler has no way to ignore a library that doesn't exist, so detect 108 # and skip nonexistent libraries for it. 109 110 > generated/optlibs.dat 111 for i in util crypt m resolv selinux smack attr crypto z log iconv tls ssl 112 do 113 echo "int main(int argc, char *argv[]) {return 0;}" | \ 114 ${CROSS_COMPILE}${CC} $CFLAGS $LDFLAGS -xc - -o generated/libprobe $LDASNEEDED -l$i > /dev/null 2>/dev/null && 115 echo -l$i >> generated/optlibs.dat 116 echo -n . 117 done 118 rm -f generated/libprobe 119 echo 120fi 121 122# LINK needs optlibs.dat, above 123 124LINK="$(echo $LDOPTIMIZE $LDFLAGS -o "$UNSTRIPPED" $LDASNEEDED $(cat generated/optlibs.dat))" 125genbuildsh > generated/build.sh && chmod +x generated/build.sh || exit 1 126 127#TODO: "make $SED && make" doesn't regenerate config.h because diff .config 128if true #isnewer generated/config.h "$KCONFIG_CONFIG" 129then 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 hyperspace. 135 # TODO: clean this up to use modern stuff. 136 137 $SED -n \ 138 -e 's/^# CONFIG_\(.*\) is not set.*/\1/' \ 139 -e 't notset' \ 140 -e 's/^CONFIG_\(.*\)=y.*/\1/' \ 141 -e 't isset' \ 142 -e 's/^CONFIG_\([^=]*\)=\(.*\)/#define CFG_\1 \2/p' \ 143 -e 'd' \ 144 -e ':notset' \ 145 -e 'h' \ 146 -e 's/.*/#define CFG_& 0/p' \ 147 -e 'g' \ 148 -e 's/.*/#define USE_&(...)/p' \ 149 -e 'd' \ 150 -e ':isset' \ 151 -e 'h' \ 152 -e 's/.*/#define CFG_& 1/p' \ 153 -e 'g' \ 154 -e 's/.*/#define USE_&(...) __VA_ARGS__/p' \ 155 $KCONFIG_CONFIG > generated/config.h || exit 1 156fi 157 158if [ ! -f generated/mkflags ] || [ generated/mkflags -ot scripts/mkflags.c ] 159then 160 do_loudly $HOSTCC scripts/mkflags.c -o generated/mkflags || exit 1 161fi 162 163# Process config.h and newtoys.h to generate FLAG_x macros. Note we must 164# always #define the relevant macro, even when it's disabled, because we 165# allow multiple NEWTOY() in the same C file. (When disabled the FLAG is 0, 166# so flags&0 becomes a constant 0 allowing dead code elimination.) 167 168if isnewer generated/flags.h toys "$KCONFIG_CONFIG" 169then 170 echo -n "generated/flags.h " 171 172 # Parse files through C preprocessor twice, once to get flags for current 173 # .config and once to get flags for allyesconfig 174 for I in A B 175 do 176 ( 177 # define macros and select header files with option string data 178 179 echo "#define NEWTOY(aa,bb,cc) aa $I bb" 180 echo '#define OLDTOY(...)' 181 if [ "$I" == A ] 182 then 183 cat generated/config.h 184 else 185 $SED '/USE_.*([^)]*)$/s/$/ __VA_ARGS__/' generated/config.h 186 fi 187 echo '#include "lib/toyflags.h"' 188 cat generated/newtoys.h 189 190 # Run result through preprocessor, glue together " " gaps leftover from USE 191 # macros, delete comment lines, print any line with a quoted optstring, 192 # turn any non-quoted opstring (NULL or 0) into " " (because fscanf can't 193 # handle "" with nothing in it, and mkflags uses that). 194 195 ) | ${CROSS_COMPILE}${CC} -E - | \ 196 $SED -n -e 's/" *"//g;/^#/d;t clear;:clear;s/"/"/p;t;s/\( [AB] \).*/\1 " "/p' 197 198 # Sort resulting line pairs and glue them together into triplets of 199 # command "flags" "allflags" 200 # to feed into mkflags C program that outputs actual flag macros 201 # If no pair (because command's disabled in config), use " " for flags 202 # so allflags can define the appropriate zero macros. 203 204 done | sort -s | $SED -n -e 's/ A / /;t pair;h;s/\([^ ]*\).*/\1 " "/;x' \ 205 -e 'b single;:pair;h;n;:single;s/[^ ]* B //;H;g;s/\n/ /;p' | \ 206 tee generated/flags.raw | generated/mkflags > generated/flags.h || exit 1 207fi 208 209# Extract global structure definitions and flag definitions from toys/*/*.c 210 211function getglobals() 212{ 213 for i in toys/*/*.c 214 do 215 # alas basename -s isn't in posix yet. 216 NAME="$(echo $i | $SED 's@.*/\(.*\)\.c@\1@')" 217 DATA="$($SED -n -e '/^GLOBALS(/,/^)/b got;b;:got' \ 218 -e 's/^GLOBALS(/_data {/' \ 219 -e 's/^)/};/' -e 'p' $i)" 220 [ ! -z "$DATA" ] && echo -e "// $i\n\nstruct $NAME$DATA\n" 221 done 222} 223 224if isnewer generated/globals.h toys 225then 226 echo -n "generated/globals.h " 227 GLOBSTRUCT="$(getglobals)" 228 ( 229 echo "$GLOBSTRUCT" 230 echo 231 echo "extern union global_union {" 232 echo "$GLOBSTRUCT" | \ 233 $SED -n 's/struct \(.*\)_data {/ struct \1_data \1;/p' 234 echo "} this;" 235 ) > generated/globals.h 236fi 237 238if [ ! -f generated/mktags ] || [ generated/mktags -ot scripts/mktags.c ] 239then 240 do_loudly $HOSTCC scripts/mktags.c -o generated/mktags || exit 1 241fi 242 243if isnewer generated/tags.h toys 244then 245 echo -n "generated/tags.h " 246 247 $SED -n '/TAGGED_ARRAY(/,/^)/{s/.*TAGGED_ARRAY[(]\([^,]*\),/\1/;p}' \ 248 toys/*/*.c lib/*.c | generated/mktags > generated/tags.h 249fi 250 251if [ ! -f generated/config2help ] || [ generated/config2help -ot scripts/config2help.c ] 252then 253 do_loudly $HOSTCC scripts/config2help.c -o generated/config2help || exit 1 254fi 255if isnewer generated/help.h generated/Config.in 256then 257 echo "generated/help.h" 258 generated/config2help Config.in $KCONFIG_CONFIG > generated/help.h || exit 1 259fi 260 261[ ! -z "$NOBUILD" ] && exit 0 262 263echo -n "Compile $OUTNAME" 264[ ! -z "$V" ] && echo 265DOTPROG=. 266 267# This is a parallel version of: do_loudly $BUILD $FILES $LINK || exit 1 268 269# Any headers newer than the oldest generated/obj file? 270X="$(ls -1t generated/obj/* 2>/dev/null | tail -n 1)" 271# TODO: redo this 272if [ ! -e "$X" ] || [ ! -z "$(find toys -name "*.h" -newer "$X")" ] 273then 274 rm -rf generated/obj && mkdir -p generated/obj || exit 1 275else 276 rm -f generated/obj/{main,lib_help}.o || exit 1 277fi 278 279# build each generated/obj/*.o file in parallel 280 281unset PENDING LNKFILES CLICK 282DONE=0 283COUNT=0 284 285for i in $LIBFILES click $TOYFILES 286do 287 [ "$i" == click ] && CLICK=1 && continue 288 289 X=${i/lib\//lib_} 290 X=${X##*/} 291 OUT="generated/obj/${X%%.c}.o" 292 LNKFILES="$LNKFILES $OUT" 293 294 # $LIBFILES don't need to be rebuilt if older than .config, $TOYFILES do 295 # ($TOYFILES contents can depend on CONFIG symbols, lib/*.c never should.) 296 297 [ "$OUT" -nt "$i" ] && [ -z "$CLICK" -o "$OUT" -nt "$KCONFIG_CONFIG" ] && 298 continue 299 300 do_loudly $BUILD -c $i -o $OUT & 301 302 # ratelimit to $CPUS many parallel jobs, detecting errors 303 [ $((++COUNT)) -ge $CPUS ] && { wait $DASHN; DONE=$?; : $((--COUNT)); } 304 [ $DONE -ne 0 ] && break 305done 306# wait for all background jobs, detecting errors 307 308while [ $((COUNT--)) -gt 0 ] 309do 310 wait $DASHN; 311 DONE=$((DONE+$?)) 312done 313[ $DONE -ne 0 ] && exit 1 314 315do_loudly $BUILD $LNKFILES $LINK || exit 1 316if [ ! -z "$NOSTRIP" ] || 317 ! do_loudly ${CROSS_COMPILE}${STRIP} "$UNSTRIPPED" -o "$OUTNAME" 318then 319 [ -z "$NOSTRIP" ] && echo "strip failed, using unstripped" 320 rm -f "$OUTNAME" && 321 cp "$UNSTRIPPED" "$OUTNAME" || exit 1 322fi 323 324# gcc 4.4's strip command is buggy, and doesn't set the executable bit on 325# its output the way SUSv4 suggests it do so. While we're at it, make sure 326# we don't have the "w" bit set so things like bzip2's "cp -f" install don't 327# overwrite our binary through the symlink. 328do_loudly chmod 555 "$OUTNAME" || exit 1 329 330echo 331