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      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 
      6 mkdir -p generated
      7 
      8 source configure
      9 
     10 probecc()
     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
     17 probesymbol()
     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 $DEFAULT\n" || exit 1
     23 }
     24 
     25 probeconfig()
     26 {
     27   > generated/cflags
     28   # llvm produces its own really stupid warnings about things that aren't wrong,
     29   # and although you can turn the warning off, gcc reacts badly to command line
     30   # arguments it doesn't understand. So probe.
     31   [ -z "$(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); }
     40 EOF
     41 
     42   probesymbol TOYBOX_FIFREEZE -c << EOF
     43     #include <linux/fs.h>
     44     #ifndef FIFREEZE
     45     #error nope
     46     #endif
     47 EOF
     48 
     49   # Work around some uClibc limitations
     50   probesymbol TOYBOX_ICONV -c << EOF
     51     #include "iconv.h"
     52 EOF
     53   probesymbol TOYBOX_FALLOCATE << EOF
     54     #include <fcntl.h>
     55 
     56     int main(int argc, char *argv[]) { return posix_fallocate(0,0,0); }
     57 EOF
     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     }
     70 EOF
     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     }
     78 EOF
     79 
     80   # Some commands are android-specific
     81   probesymbol TOYBOX_ON_ANDROID -c << EOF
     82     #ifndef __ANDROID__
     83     #error nope
     84     #endif
     85 EOF
     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); }
     91 EOF
     92 
     93   # nommu support
     94   probesymbol TOYBOX_FORK << EOF
     95     #include <unistd.h>
     96     int main(int argc, char *argv[]) { return fork(); }
     97 EOF
     98   echo -e '\tdepends on !TOYBOX_MUSL_NOMMU_IS_BROKEN'
     99 
    100   probesymbol TOYBOX_PRLIMIT << EOF
    101     #include <sys/time.h>
    102     #include <sys/resource.h>
    103 
    104     int main(int argc, char *argv[]) { prlimit(0, 0, 0, 0); }
    105 EOF
    106 }
    107 
    108 genconfig()
    109 {
    110   # Reverse sort puts posix first, examples last.
    111   for j in $(ls toys/*/README | sort -s -r)
    112   do
    113     DIR="$(dirname "$j")"
    114 
    115     [ $(ls "$DIR" | wc -l) -lt 2 ] && continue
    116 
    117     echo "menu \"$(head -n 1 $j)\""
    118     echo
    119 
    120     # extract config stanzas from each source file, in alphabetical order
    121     for i in $(ls -1 $DIR/*.c)
    122     do
    123       # Grab the config block for Config.in
    124       echo "# $i"
    125       sed -n '/^\*\//q;/^config [A-Z]/,$p' $i || return 1
    126       echo
    127     done
    128 
    129     echo endmenu
    130   done
    131 }
    132 
    133 probeconfig > generated/Config.probed || rm generated/Config.probed
    134 genconfig > generated/Config.in || rm generated/Config.in
    135 
    136 # Find names of commands that can be built standalone in these C files
    137 toys()
    138 {
    139   grep 'TOY(.*)' "$@" | grep -v TOYFLAG_NOFORK | grep -v "0))" | \
    140     sed -rn 's/([^:]*):.*(OLD|NEW)TOY\( *([a-zA-Z][^,]*) *,.*/\1:\3/p'
    141 }
    142 
    143 WORKING=
    144 PENDING=
    145 toys toys/*/*.c | (
    146 while IFS=":" read FILE NAME
    147 do
    148   [ "$NAME" == help ] && continue
    149   [ "$NAME" == install ] && continue
    150   echo -e "$NAME: $FILE *.[ch] lib/*.[ch]\n\tscripts/single.sh $NAME\n"
    151   echo -e "test_$NAME:\n\tscripts/test.sh $NAME\n"
    152   [ "${FILE/pending//}" != "$FILE" ] &&
    153     PENDING="$PENDING $NAME" ||
    154     WORKING="$WORKING $NAME"
    155 done &&
    156 echo -e "clean::\n\trm -f $WORKING $PENDING" &&
    157 echo -e "list:\n\t@echo $(echo $WORKING | tr ' ' '\n' | sort | xargs)" &&
    158 echo -e "list_pending:\n\t@echo $(echo $PENDING | tr ' ' '\n' | sort | xargs)" &&
    159 echo -e ".PHONY: $WORKING $PENDING" | sed 's/ \([^ ]\)/ test_\1/g'
    160 ) > .singlemake
    161