1#!/bin/bash 2 3# This has to be a separate file from scripts/make.sh so it can be called 4# before menuconfig. (It's called again from scripts/make.sh just to be sure.) 5 6mkdir -p generated 7 8source scripts/portability.sh 9 10probecc() 11{ 12 ${CROSS_COMPILE}${CC} $CFLAGS -xc -o /dev/null $1 - 13} 14 15# Probe for a single config symbol with a "compiles or not" test. 16# Symbol name is first argument, flags second, feed C file to stdin 17probesymbol() 18{ 19 probecc $2 2>/dev/null && DEFAULT=y || DEFAULT=n 20 rm a.out 2>/dev/null 21 echo -e "config $1\n\tbool" || exit 1 22 echo -e "\tdefault $DEFAULT\n" || exit 1 23} 24 25probeconfig() 26{ 27 > generated/cflags 28 # llvm produces its own really stupid warnings about things that aren't wrong, 29 # and although you can turn the warning off, gcc reacts badly to command line 30 # arguments it doesn't understand. So probe. 31 [ -z "$(probecc -Wno-string-plus-int <<< \#warn warn 2>&1 | grep string-plus-int)" ] && 32 echo -Wno-string-plus-int >> generated/cflags 33 34 # Probe for container support on target 35 probesymbol TOYBOX_CONTAINER << EOF 36 #include <stdio.h> 37 #include <sys/syscall.h> 38 #include <linux/sched.h> 39 int x=CLONE_NEWNS|CLONE_NEWUTS|CLONE_NEWIPC|CLONE_NEWNET; 40 41 int main(int argc, char *argv[]){printf("%d", x+SYS_unshare+ SYS_setns);} 42EOF 43 44 probesymbol TOYBOX_FIFREEZE -c << EOF 45 #include <linux/fs.h> 46 #ifndef FIFREEZE 47 #error nope 48 #endif 49EOF 50 51 # Work around some uClibc limitations 52 probesymbol TOYBOX_ICONV -c << EOF 53 #include "iconv.h" 54EOF 55 probesymbol TOYBOX_FALLOCATE << EOF 56 #include <fcntl.h> 57 58 int main(int argc, char *argv[]) { return posix_fallocate(0,0,0); } 59EOF 60 61 # Android and some other platforms miss utmpx 62 probesymbol TOYBOX_UTMPX -c << EOF 63 #include <utmpx.h> 64 #ifndef BOOT_TIME 65 #error nope 66 #endif 67 int main(int argc, char *argv[]) { 68 struct utmpx *a; 69 if (0 != (a = getutxent())) return 0; 70 return 1; 71 } 72EOF 73 74 # Android is missing shadow.h 75 probesymbol TOYBOX_SHADOW -c << EOF 76 #include <shadow.h> 77 int main(int argc, char *argv[]) { 78 struct spwd *a = getspnam("root"); return 0; 79 } 80EOF 81 82 # Some commands are android-specific 83 probesymbol TOYBOX_ON_ANDROID -c << EOF 84 #ifndef __ANDROID__ 85 #error nope 86 #endif 87EOF 88 89 probesymbol TOYBOX_ANDROID_SCHEDPOLICY << EOF 90 #include <processgroup/sched_policy.h> 91 92 int main(int argc,char *argv[]) { get_sched_policy_name(0); } 93EOF 94 95 # nommu support 96 probesymbol TOYBOX_FORK << EOF 97 #include <unistd.h> 98 int main(int argc, char *argv[]) { return fork(); } 99EOF 100 echo -e '\tdepends on !TOYBOX_MUSL_NOMMU_IS_BROKEN' 101 102 probesymbol TOYBOX_PRLIMIT << EOF 103 #include <sys/types.h> 104 #include <sys/time.h> 105 #include <sys/resource.h> 106 int prlimit(pid_t pid, int resource, const struct rlimit *new_limit, 107 struct rlimit *old_limit); 108 int main(int argc, char *argv[]) { prlimit(0, 0, 0, 0); } 109EOF 110 111 probesymbol TOYBOX_GETRANDOM << EOF 112 #include <sys/random.h> 113 int main(void) { char buf[100]; getrandom(buf, 100, 0); } 114EOF 115} 116 117genconfig() 118{ 119 # Reverse sort puts posix first, examples last. 120 for j in $(ls toys/*/README | sort -s -r) 121 do 122 DIR="$(dirname "$j")" 123 124 [ $(ls "$DIR" | wc -l) -lt 2 ] && continue 125 126 echo "menu \"$(head -n 1 $j)\"" 127 echo 128 129 # extract config stanzas from each source file, in alphabetical order 130 for i in $(ls -1 $DIR/*.c) 131 do 132 # Grab the config block for Config.in 133 echo "# $i" 134 $SED -n '/^\*\//q;/^config [A-Z]/,$p' $i || return 1 135 echo 136 done 137 138 echo endmenu 139 done 140} 141 142probeconfig > generated/Config.probed || rm generated/Config.probed 143genconfig > generated/Config.in || rm generated/Config.in 144 145# Find names of commands that can be built standalone in these C files 146toys() 147{ 148 grep 'TOY(.*)' "$@" | grep -v TOYFLAG_NOFORK | grep -v "0))" | \ 149 $SED -En 's/([^:]*):.*(OLD|NEW)TOY\( *([a-zA-Z][^,]*) *,.*/\1:\3/p' 150} 151 152WORKING= 153PENDING= 154toys toys/*/*.c | ( 155while IFS=":" read FILE NAME 156do 157 [ "$NAME" == help ] && continue 158 [ "$NAME" == install ] && continue 159 echo -e "$NAME: $FILE *.[ch] lib/*.[ch]\n\tscripts/single.sh $NAME\n" 160 echo -e "test_$NAME:\n\tscripts/test.sh $NAME\n" 161 [ "${FILE/pending//}" != "$FILE" ] && 162 PENDING="$PENDING $NAME" || 163 WORKING="$WORKING $NAME" 164done && 165echo -e "clean::\n\t@rm -f $WORKING $PENDING" && 166echo -e "list:\n\t@echo $(echo $WORKING | tr ' ' '\n' | sort | xargs)" && 167echo -e "list_pending:\n\t@echo $(echo $PENDING | tr ' ' '\n' | sort | xargs)" && 168echo -e ".PHONY: $WORKING $PENDING" | $SED 's/ \([^ ]\)/ test_\1/g' 169) > .singlemake 170