#!/bin/bash # This has to be a separate file from scripts/make.sh so it can be called # before menuconfig. (It's called again from scripts/make.sh just to be sure.) mkdir -p generated source configure probecc() { ${CROSS_COMPILE}${CC} $CFLAGS -xc -o /dev/null $1 - } # Probe for a single config symbol with a "compiles or not" test. # Symbol name is first argument, flags second, feed C file to stdin probesymbol() { probecc $2 2>/dev/null && DEFAULT=y || DEFAULT=n rm a.out 2>/dev/null echo -e "config $1\n\tbool" || exit 1 echo -e "\tdefault $DEFAULT\n" || exit 1 } probeconfig() { > generated/cflags # llvm produces its own really stupid warnings about things that aren't wrong, # and although you can turn the warning off, gcc reacts badly to command line # arguments it doesn't understand. So probe. [ -z "$(probecc -Wno-string-plus-int <<< \#warn warn 2>&1 | grep string-plus-int)" ] && echo -Wno-string-plus-int >> generated/cflags # Probe for container support on target probesymbol TOYBOX_CONTAINER << EOF #include <linux/sched.h> int x=CLONE_NEWNS|CLONE_NEWUTS|CLONE_NEWIPC|CLONE_NEWNET; int main(int argc, char *argv[]) { return unshare(x); } EOF probesymbol TOYBOX_FIFREEZE -c << EOF #include <linux/fs.h> #ifndef FIFREEZE #error nope #endif EOF # Work around some uClibc limitations probesymbol TOYBOX_ICONV -c << EOF #include "iconv.h" EOF probesymbol TOYBOX_FALLOCATE << EOF #include <fcntl.h> int main(int argc, char *argv[]) { return posix_fallocate(0,0,0); } EOF # Android and some other platforms miss utmpx probesymbol TOYBOX_UTMPX -c << EOF #include <utmpx.h> #ifndef BOOT_TIME #error nope #endif int main(int argc, char *argv[]) { struct utmpx *a; if (0 != (a = getutxent())) return 0; return 1; } EOF # Android is missing shadow.h probesymbol TOYBOX_SHADOW -c << EOF #include <shadow.h> int main(int argc, char *argv[]) { struct spwd *a = getspnam("root"); return 0; } EOF # Some commands are android-specific probesymbol TOYBOX_ON_ANDROID -c << EOF #ifndef __ANDROID__ #error nope #endif EOF # nommu support probesymbol TOYBOX_FORK << EOF #include <unistd.h> int main(int argc, char *argv[]) { return fork(); } EOF echo -e '\tdepends on !TOYBOX_MUSL_NOMMU_IS_BROKEN' } genconfig() { # Reverse sort puts posix first, examples last. for j in $(ls toys/*/README | sort -r) do DIR="$(dirname "$j")" [ $(ls "$DIR" | wc -l) -lt 2 ] && continue echo "menu \"$(head -n 1 $j)\"" echo # extract config stanzas from each source file, in alphabetical order for i in $(ls -1 $DIR/*.c) do # Grab the config block for Config.in echo "# $i" sed -n '/^\*\//q;/^config [A-Z]/,$p' $i || return 1 echo done echo endmenu done } probeconfig > generated/Config.probed || rm generated/Config.probed genconfig > generated/Config.in || rm generated/Config.in # Find names of commands that can be built standalone in these C files toys() { grep 'TOY(.*)' "$@" | grep -v TOYFLAG_NOFORK | \ sed -rn 's/([^:]*):.*(OLD|NEW)TOY\( *([a-zA-Z][^,]*) *,.*/\1:\3/p' } WORKING= PENDING= toys toys/*/*.c | ( while IFS=":" read FILE NAME do [ "$NAME" == help ] && continue [ "$NAME" == install ] && continue echo -e "$NAME: $FILE *.[ch] lib/*.[ch]\n\tscripts/single.sh $NAME\n" [ "${FILE/pending//}" != "$FILE" ] && PENDING="$PENDING $NAME" || WORKING="$WORKING $NAME" done > .singlemake && echo -e "clean::\n\trm -f $WORKING $PENDING" >> .singlemake && echo -e "working:\n\t@echo $(echo $WORKING | tr ' ' '\n' | sort | xargs)" \ >> .singlemake && echo -e "pending:\n\t@echo $(echo $PENDING | tr ' ' '\n' | sort | xargs)" \ >> .singlemake )