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 <linux/sched.h> 37 int x=CLONE_NEWNS|CLONE_NEWUTS|CLONE_NEWIPC|CLONE_NEWNET; 38 39 int main(int argc, char *argv[]) { setns(0,0); return unshare(x); } 40EOF 41 42 probesymbol TOYBOX_FIFREEZE -c << EOF 43 #include <linux/fs.h> 44 #ifndef FIFREEZE 45 #error nope 46 #endif 47EOF 48 49 # Work around some uClibc limitations 50 probesymbol TOYBOX_ICONV -c << EOF 51 #include "iconv.h" 52EOF 53 probesymbol TOYBOX_FALLOCATE << EOF 54 #include <fcntl.h> 55 56 int main(int argc, char *argv[]) { return posix_fallocate(0,0,0); } 57EOF 58 59 # Android and some other platforms miss utmpx 60 probesymbol TOYBOX_UTMPX -c << EOF 61 #include <utmpx.h> 62 #ifndef BOOT_TIME 63 #error nope 64 #endif 65 int main(int argc, char *argv[]) { 66 struct utmpx *a; 67 if (0 != (a = getutxent())) return 0; 68 return 1; 69 } 70EOF 71 72 # Android is missing shadow.h 73 probesymbol TOYBOX_SHADOW -c << EOF 74 #include <shadow.h> 75 int main(int argc, char *argv[]) { 76 struct spwd *a = getspnam("root"); return 0; 77 } 78EOF 79 80 # Some commands are android-specific 81 probesymbol TOYBOX_ON_ANDROID -c << EOF 82 #ifndef __ANDROID__ 83 #error nope 84 #endif 85EOF 86 87 probesymbol TOYBOX_ANDROID_SCHEDPOLICY << EOF 88 #include <cutils/sched_policy.h> 89 90 int main(int argc,char *argv[]) { get_sched_policy_name(0); } 91EOF 92 93 # nommu support 94 probesymbol TOYBOX_FORK << EOF 95 #include <unistd.h> 96 int main(int argc, char *argv[]) { return fork(); } 97EOF 98 echo -e '\tdepends on !TOYBOX_MUSL_NOMMU_IS_BROKEN' 99 100 probesymbol TOYBOX_PRLIMIT << EOF 101 #include <sys/types.h> 102 #include <sys/time.h> 103 #include <sys/resource.h> 104 int prlimit(pid_t pid, int resource, const struct rlimit *new_limit, 105 struct rlimit *old_limit); 106 int main(int argc, char *argv[]) { prlimit(0, 0, 0, 0); } 107EOF 108 109 probesymbol TOYBOX_GETRANDOM << EOF 110 #include <sys/random.h> 111 int main(void) { char buf[100]; getrandom(buf, 100, 0); } 112EOF 113} 114 115genconfig() 116{ 117 # Reverse sort puts posix first, examples last. 118 for j in $(ls toys/*/README | sort -s -r) 119 do 120 DIR="$(dirname "$j")" 121 122 [ $(ls "$DIR" | wc -l) -lt 2 ] && continue 123 124 echo "menu \"$(head -n 1 $j)\"" 125 echo 126 127 # extract config stanzas from each source file, in alphabetical order 128 for i in $(ls -1 $DIR/*.c) 129 do 130 # Grab the config block for Config.in 131 echo "# $i" 132 $SED -n '/^\*\//q;/^config [A-Z]/,$p' $i || return 1 133 echo 134 done 135 136 echo endmenu 137 done 138} 139 140probeconfig > generated/Config.probed || rm generated/Config.probed 141genconfig > generated/Config.in || rm generated/Config.in 142 143# Find names of commands that can be built standalone in these C files 144toys() 145{ 146 grep 'TOY(.*)' "$@" | grep -v TOYFLAG_NOFORK | grep -v "0))" | \ 147 $SED -En 's/([^:]*):.*(OLD|NEW)TOY\( *([a-zA-Z][^,]*) *,.*/\1:\3/p' 148} 149 150WORKING= 151PENDING= 152toys toys/*/*.c | ( 153while IFS=":" read FILE NAME 154do 155 [ "$NAME" == help ] && continue 156 [ "$NAME" == install ] && continue 157 echo -e "$NAME: $FILE *.[ch] lib/*.[ch]\n\tscripts/single.sh $NAME\n" 158 echo -e "test_$NAME:\n\tscripts/test.sh $NAME\n" 159 [ "${FILE/pending//}" != "$FILE" ] && 160 PENDING="$PENDING $NAME" || 161 WORKING="$WORKING $NAME" 162done && 163echo -e "clean::\n\trm -f $WORKING $PENDING" && 164echo -e "list:\n\t@echo $(echo $WORKING | tr ' ' '\n' | sort | xargs)" && 165echo -e "list_pending:\n\t@echo $(echo $PENDING | tr ' ' '\n' | sort | xargs)" && 166echo -e ".PHONY: $WORKING $PENDING" | $SED 's/ \([^ ]\)/ test_\1/g' 167) > .singlemake 168