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 configure 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[]) { 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 88genconfig() 89{ 90 # Reverse sort puts posix first, examples last. 91 for j in $(ls toys/*/README | sort -r) 92 do 93 DIR="$(dirname "$j")" 94 95 [ $(ls "$DIR" | wc -l) -lt 2 ] && continue 96 97 echo "menu \"$(head -n 1 $j)\"" 98 echo 99 100 # extract config stanzas from each source file, in alphabetical order 101 for i in $(ls -1 $DIR/*.c) 102 do 103 # Grab the config block for Config.in 104 echo "# $i" 105 sed -n '/^\*\//q;/^config [A-Z]/,$p' $i || return 1 106 echo 107 done 108 109 echo endmenu 110 done 111} 112 113probeconfig > generated/Config.probed || rm generated/Config.probed 114genconfig > generated/Config.in || rm generated/Config.in 115