1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
#!/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[]) { setns(0,0); 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
probesymbol TOYBOX_ANDROID_SCHEDPOLICY << EOF
#include <cutils/sched_policy.h>
int main(int argc,char *argv[]) { get_sched_policy_name(0); }
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'
probesymbol TOYBOX_PRLIMIT << EOF
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
int prlimit(pid_t pid, int resource, const struct rlimit *new_limit,
struct rlimit *old_limit);
int main(int argc, char *argv[]) { prlimit(0, 0, 0, 0); }
EOF
probesymbol TOYBOX_GETRANDOM << EOF
#include <sys/random.h>
int main(void) { char buf[100]; getrandom(buf, 100, 0); }
EOF
}
genconfig()
{
# Reverse sort puts posix first, examples last.
for j in $(ls toys/*/README | sort -s -r)
do
DIR="$(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 | grep -v "0))" | \
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 $NAME\n"
echo -e "test_$NAME:\n\tscripts/test.sh $NAME\n"
[ "${FILE/pending//}" != "$FILE" ] &&
PENDING="$PENDING $NAME" ||
WORKING="$WORKING $NAME"
done &&
echo -e "clean::\n\trm -f $WORKING $PENDING" &&
echo -e "list:\n\t@echo $(echo $WORKING | tr ' ' '\n' | sort | xargs)" &&
echo -e "list_pending:\n\t@echo $(echo $PENDING | tr ' ' '\n' | sort | xargs)" &&
echo -e ".PHONY: $WORKING $PENDING" | sed 's/ \([^ ]\)/ test_\1/g'
) > .singlemake
|
