Gecko [ dallasfobana2023.variationbd.com ]

Name	Size	Permission
7za	46 B	-rwxr-xr-x
GET	15.84 KB	-rwxr-xr-x
Mail	408.89 KB	-rwxr-xr-x
[	53.67 KB	-rwxr-xr-x
aclocal	35.62 KB	-rwxr-xr-x
aclocal-1.16	35.62 KB	-rwxr-xr-x
addr2line	33.41 KB	-rwxr-xr-x
animate	11.84 KB	-rwxr-xr-x
ar	61.96 KB	-rwxr-xr-x
arch	37.41 KB	-rwxr-xr-x
arpaname	11.82 KB	-rwxr-xr-x
as	889.91 KB	-rwxr-xr-x
aspell	159.5 KB	-rwxr-xr-x
at	1.01 KB	-rwxr-xr-x
atq	1.01 KB	-rwxr-xr-x
atrm	1.02 KB	-rwxr-xr-x
autoconf	14.42 KB	-rwxr-xr-x
autoheader	8.33 KB	-rwxr-xr-x
autom4te	31.43 KB	-rwxr-xr-x
automake	251.9 KB	-rwxr-xr-x
automake-1.16	251.9 KB	-rwxr-xr-x
autoreconf	20.57 KB	-rwxr-xr-x
autoscan	16.72 KB	-rwxr-xr-x
autoupdate	33.08 KB	-rwxr-xr-x
awk	669.77 KB	-rwxr-xr-x
b2sum	57.76 KB	-rwxr-xr-x
base32	41.55 KB	-rwxr-xr-x
base64	41.56 KB	-rwxr-xr-x
basename	37.49 KB	-rwxr-xr-x
bash	1.1 MB	-rwxr-xr-x
bashbug-64	7.18 KB	-rwxr-xr-x
batch	137 B	-rwxr-xr-x
bison	437.72 KB	-rwxr-xr-x
bunzip2	36.87 KB	-rwxr-xr-x
bzcat	36.87 KB	-rwxr-xr-x
bzcmp	2.08 KB	-rwxr-xr-x
bzdiff	2.08 KB	-rwxr-xr-x
bzgrep	1.64 KB	-rwxr-xr-x
bzip2	36.87 KB	-rwxr-xr-x
bzip2recover	16.45 KB	-rwxr-xr-x
bzless	1.23 KB	-rwxr-xr-x
bzmore	1.23 KB	-rwxr-xr-x
c++	1.21 MB	-rwxr-x---
c++filt	28.89 KB	-rwxr-xr-x
c89	224 B	-rwxr-x---
c99	215 B	-rwxr-x---
cagefs_enter.proxied	1.03 KB	-rwxr-xr-x
cal	65.98 KB	-rwxr-xr-x
captoinfo	85.31 KB	-rwxr-xr-x
cat	37.54 KB	-rwxr-xr-x
catchsegv	3.21 KB	-rwxr-xr-x
cc	1.2 MB	-rwxr-x---
chcon	70.43 KB	-rwxr-xr-x
chgrp	66.35 KB	-rwxr-xr-x
chmod	62.29 KB	-rwxr-xr-x
chown	70.39 KB	-rwxr-xr-x
chrt	37.18 KB	-rwxr-xr-x
cksum	37.46 KB	-rwxr-xr-x
cldetect	10.36 KB	-rwxr-xr-x
clear	12.54 KB	-rwxr-xr-x
clusterdb	70.23 KB	-rwxr-xr-x
cmp	103.76 KB	-rwxr-xr-x
col	29 KB	-rwxr-xr-x
colcrt	16.48 KB	-rwxr-xr-x
colrm	24.88 KB	-rwxr-xr-x
column	49.47 KB	-rwxr-xr-x
comm	41.63 KB	-rwxr-xr-x
compare	11.85 KB	-rwxr-xr-x
composite	11.84 KB	-rwxr-xr-x
conjure	11.84 KB	-rwxr-xr-x
convert	11.84 KB	-rwxr-xr-x
cp	148.05 KB	-rwxr-xr-x
cpan	7.87 KB	-rwxr-xr-x
cpp	1.21 MB	-rwxr-xr-x
createdb	70.22 KB	-rwxr-xr-x
createuser	74.63 KB	-rwxr-xr-x
crontab	1.36 KB	-rwxr-xr-x
crontab.cagefs	54.16 KB	-rwxr-xr-x
csplit	53.76 KB	-rwxr-xr-x
curl	230.08 KB	-rwxr-xr-x
cut	49.59 KB	-rwxr-xr-x
date	106.03 KB	-rwxr-xr-x
dbiprof	6.06 KB	-rwxr-xr-x
dd	78.05 KB	-rwxr-xr-x
delv	42.46 KB	-rwxr-xr-x
df	91.16 KB	-rwxr-xr-x
diff	268.01 KB	-rwxr-xr-x
diff3	128.6 KB	-rwxr-xr-x
dig	162.19 KB	-rwxr-xr-x
dir	139.97 KB	-rwxr-xr-x
dircolors	49.63 KB	-rwxr-xr-x
dirname	33.44 KB	-rwxr-xr-x
display	11.84 KB	-rwxr-xr-x
dnstap-read	20.43 KB	-rwxr-xr-x
dropdb	66.02 KB	-rwxr-xr-x
dropuser	65.99 KB	-rwxr-xr-x
du	107.1 KB	-rwxr-xr-x
echo	37.43 KB	-rwxr-xr-x
egrep	28 B	-rwxr-xr-x
enc2xs	40.97 KB	-rwxr-xr-x
enchant	21.08 KB	-rwxr-xr-x
enchant-lsmod	13.09 KB	-rwxr-xr-x
env	41.43 KB	-rwxr-xr-x
eps2eps	639 B	-rwxr-xr-x
eqn	232.16 KB	-rwxr-xr-x
ex	1.13 MB	-rwxr-xr-x
expand	41.66 KB	-rwxr-xr-x
expr	49.65 KB	-rwxr-xr-x
factor	86.05 KB	-rwxr-xr-x
false	33.39 KB	-rwxr-xr-x
fc-cache	132 B	-rwxr-xr-x
fc-cache-64	20.35 KB	-rwxr-xr-x
fc-cat	16.35 KB	-rwxr-xr-x
fc-conflist	12.25 KB	-rwxr-xr-x
fc-list	12.25 KB	-rwxr-xr-x
fc-match	16.26 KB	-rwxr-xr-x
fc-pattern	12.26 KB	-rwxr-xr-x
fc-query	12.24 KB	-rwxr-xr-x
fc-scan	12.26 KB	-rwxr-xr-x
fc-validate	16.26 KB	-rwxr-xr-x
fgrep	28 B	-rwxr-xr-x
file	24.68 KB	-rwxr-xr-x
find	223.3 KB	-rwxr-xr-x
flex	428.45 KB	-rwxr-xr-x
flex++	428.45 KB	-rwxr-xr-x
flock	33.2 KB	-rwxr-xr-x
fmt	45.57 KB	-rwxr-xr-x
fold	41.48 KB	-rwxr-xr-x
free	20.79 KB	-rwxr-xr-x
freetype-config	4.31 KB	-rwxr-xr-x
funzip	36.74 KB	-rwxr-xr-x
g++	1.21 MB	-rwxr-x---
gawk	669.77 KB	-rwxr-xr-x
gcc	1.2 MB	-rwxr-x---
gcc-ar	36.64 KB	-rwxr-xr-x
gcc-nm	36.65 KB	-rwxr-xr-x
gcc-ranlib	36.65 KB	-rwxr-xr-x
gcov	1.31 MB	-rwxr-xr-x
gcov-dump	566.9 KB	-rwxr-xr-x
gcov-tool	603.72 KB	-rwxr-xr-x
gem	542 B	-rwxr-xr-x
gencat	24.84 KB	-rwxr-xr-x
geoiplookup	21.89 KB	-rwxr-xr-x
geoiplookup6	21.65 KB	-rwxr-xr-x
geqn	232.16 KB	-rwxr-xr-x
getconf	32.46 KB	-rwxr-xr-x
getent	33.13 KB	-rwxr-xr-x
getopt	20.52 KB	-rwxr-xr-x
ghostscript	12.35 KB	-rwxr-xr-x
git	3.67 MB	-rwxr-xr-x
git-receive-pack	3.67 MB	-rwxr-xr-x
git-shell	2.13 MB	-rwxr-xr-x
git-upload-archive	3.67 MB	-rwxr-xr-x
git-upload-pack	3.67 MB	-rwxr-xr-x
gm	7.82 KB	-rwxr-xr-x
gmake	235.32 KB	-rwxr-xr-x
gneqn	908 B	-rwxr-xr-x
gnroff	3.23 KB	-rwxr-xr-x
gpg	1.04 MB	-rwxr-xr-x
gpg-agent	419.29 KB	-rwxr-xr-x
gpg-error	34.16 KB	-rwxr-xr-x
gpg-zip	3.44 KB	-rwxr-xr-x
gpgsplit	87.02 KB	-rwxr-xr-x
gpgv	451.58 KB	-rwxr-xr-x
gpic	293.84 KB	-rwxr-xr-x
gprof	103.36 KB	-rwxr-xr-x
grep	193.63 KB	-rwxr-xr-x
groff	124.92 KB	-rwxr-xr-x
grops	191.14 KB	-rwxr-xr-x
grotty	141.9 KB	-rwxr-xr-x
groups	37.47 KB	-rwxr-xr-x
gs	12.35 KB	-rwxr-xr-x
gsnd	277 B	-rwxr-xr-x
gsoelim	42.55 KB	-rwxr-xr-x
gtar	449.03 KB	-rwxr-xr-x
gtbl	154.61 KB	-rwxr-xr-x
gtroff	805.02 KB	-rwxr-xr-x
gunzip	2.29 KB	-rwxr-xr-x
gzexe	6.23 KB	-rwxr-xr-x
gzip	94.67 KB	-rwxr-xr-x
h2ph	28.69 KB	-rwxr-xr-x
h2xs	59.44 KB	-rwxr-xr-x
head	45.58 KB	-rwxr-xr-x
hexdump	57.5 KB	-rwxr-xr-x
host	142.3 KB	-rwxr-xr-x
hostid	33.41 KB	-rwxr-xr-x
hostname	21.16 KB	-rwxr-xr-x
hunspell	144.7 KB	-rwxr-xr-x
iconv	61.44 KB	-rwxr-xr-x
id	45.52 KB	-rwxr-xr-x
identify	11.84 KB	-rwxr-xr-x
idn	39.41 KB	-rwxr-xr-x
ifnames	4.03 KB	-rwxr-xr-x
import	11.84 KB	-rwxr-xr-x
infocmp	61.05 KB	-rwxr-xr-x
infotocap	85.31 KB	-rwxr-xr-x
install	156.25 KB	-rwxr-xr-x
instmodsh	4.1 KB	-rwxr-xr-x
ionice	28.98 KB	-rwxr-xr-x
ipcrm	28.99 KB	-rwxr-xr-x
ipcs	53.39 KB	-rwxr-xr-x
isosize	24.88 KB	-rwxr-xr-x
ispell	988 B	-rwxr-xr-x
join	53.77 KB	-rwxr-xr-x
kill	37.27 KB	-rwxr-xr-x
ld	1.71 MB	-rwxr-x---
ld.bfd	1.71 MB	-rwxr-x---
ldd	5.31 KB	-rwxr-xr-x
less	173.76 KB	-rwxr-xr-x
lessecho	12.4 KB	-rwxr-xr-x
lesskey	21.99 KB	-rwxr-xr-x
lesspipe.sh	3.07 KB	-rwxr-xr-x
lex	428.45 KB	-rwxr-xr-x
libnetcfg	15.41 KB	-rwxr-xr-x
libtool	359.11 KB	-rwxr-xr-x
libtoolize	126.17 KB	-rwxr-xr-x
link	33.41 KB	-rwxr-xr-x
ln	70.57 KB	-rwxr-xr-x
locale	56.45 KB	-rwxr-xr-x
localedef	307.47 KB	-rwxr-xr-x
logger	49.98 KB	-rwxr-xr-x
login	40.96 KB	-rwxr-xr-x
logname	33.42 KB	-rwxr-xr-x
look	16.45 KB	-rwxr-xr-x
ls	139.97 KB	-rwxr-xr-x
lynx	1.84 MB	-rwxr-xr-x
m4	185.56 KB	-rwxr-xr-x
mail	408.89 KB	-rwxr-xr-x
mailx	408.89 KB	-rwxr-xr-x
make	235.32 KB	-rwxr-xr-x
make-dummy-cert	610 B	-rwxr-xr-x
mariadb	4.36 MB	-rwxr-xr-x
mariadb-access	109.34 KB	-rwxr-xr-x
mariadb-admin	3.88 MB	-rwxr-xr-x
mariadb-binlog	4.17 MB	-rwxr-xr-x
mariadb-check	3.88 MB	-rwxr-xr-x
mariadb-dump	3.96 MB	-rwxr-xr-x
mariadb-find-rows	3.21 KB	-rwxr-xr-x
mariadb-import	3.87 MB	-rwxr-xr-x
mariadb-show	3.87 MB	-rwxr-xr-x
mariadb-waitpid	3.56 MB	-rwxr-xr-x
mc	1.3 MB	-rwxr-xr-x
mcdiff	1.3 MB	-rwxr-xr-x
mcedit	1.3 MB	-rwxr-xr-x
mcookie	33.26 KB	-rwxr-xr-x
mcview	1.3 MB	-rwxr-xr-x
md5sum	45.62 KB	-rwxr-xr-x
mesg	16.36 KB	-rwxr-xr-x
mkdir	82.79 KB	-rwxr-xr-x
mkfifo	66.56 KB	-rwxr-xr-x
mknod	70.55 KB	-rwxr-xr-x
mktemp	45.73 KB	-rwxr-xr-x
mogrify	11.84 KB	-rwxr-xr-x
montage	11.84 KB	-rwxr-xr-x
more	44.94 KB	-rwxr-xr-x
msql2mysql	1.41 KB	-rwxr-xr-x
mv	144.03 KB	-rwxr-xr-x
my_print_defaults	3.56 MB	-rwxr-xr-x
mysql	4.36 MB	-rwxr-xr-x
mysql_config	4.6 KB	-rwxr-xr-x
mysql_find_rows	3.21 KB	-rwxr-xr-x
mysql_waitpid	3.56 MB	-rwxr-xr-x
mysqlaccess	109.34 KB	-rwxr-xr-x
mysqladmin	3.88 MB	-rwxr-xr-x
mysqlbinlog	4.17 MB	-rwxr-xr-x
mysqlcheck	3.88 MB	-rwxr-xr-x
mysqldump	3.96 MB	-rwxr-xr-x
mysqlimport	3.87 MB	-rwxr-xr-x
mysqlshow	3.87 MB	-rwxr-xr-x
namei	33.1 KB	-rwxr-xr-x
nano	247.94 KB	-rwxr-xr-x
neqn	908 B	-rwxr-xr-x
nice	37.41 KB	-rwxr-xr-x
nl	45.63 KB	-rwxr-xr-x
nm	50.38 KB	-rwxr-xr-x
nohup	37.48 KB	-rwxr-xr-x
nproc	37.48 KB	-rwxr-xr-x
nroff	3.23 KB	-rwxr-xr-x
nslookup	146.26 KB	-rwxr-xr-x
nsupdate	73.05 KB	-rwxr-xr-x
numfmt	65.71 KB	-rwxr-xr-x
objcopy	240.07 KB	-rwxr-xr-x
objdump	419.76 KB	-rwxr-xr-x
od	73.88 KB	-rwxr-xr-x
openssl	745.95 KB	-rwxr-xr-x
pango-list	11.88 KB	-rwxr-xr-x
pango-view	57.44 KB	-rwxr-xr-x
passwd	1.02 KB	-rwxr-xr-x
paste	37.46 KB	-rwxr-xr-x
patch	206.46 KB	-rwxr-xr-x
pathchk	37.41 KB	-rwxr-xr-x
pdf2dsc	698 B	-rwxr-xr-x
pdf2ps	909 B	-rwxr-xr-x
perl	12.44 KB	-rwxr-xr-x
perl5.26.3	12.44 KB	-rwxr-xr-x
perlbug	44.39 KB	-rwxr-xr-x
perldoc	118 B	-rwxr-xr-x
perlivp	10.56 KB	-rwxr-xr-x
perlml	6.86 KB	-rwxr-xr-x
perlthanks	44.39 KB	-rwxr-xr-x
pg_config	45.4 KB	-rwxr-xr-x
pg_dump	399.43 KB	-rwxr-xr-x
pg_dumpall	107.11 KB	-rwxr-xr-x
pg_restore	173.34 KB	-rwxr-xr-x
pgrep	28.84 KB	-rwxr-xr-x
php	937 B	-rwxr-xr-x
pic	293.84 KB	-rwxr-xr-x
piconv	8.08 KB	-rwxr-xr-x
pinentry	2.35 KB	-rwxr-xr-x
pinentry-curses	77.89 KB	-rwxr-xr-x
ping	1.02 KB	-rwxr-xr-x
pinky	41.53 KB	-rwxr-xr-x
pkg-config	40.04 KB	-rwxr-xr-x
pkgconf	40.04 KB	-rwxr-xr-x
pkill	28.84 KB	-rwxr-xr-x
pl2pm	4.43 KB	-rwxr-xr-x
pmap	32.78 KB	-rwxr-xr-x
pod2html	4.04 KB	-rwxr-xr-x
pod2man	14.68 KB	-rwxr-xr-x
pod2text	10.55 KB	-rwxr-xr-x
pod2usage	3.86 KB	-rwxr-xr-x
podchecker	3.57 KB	-rwxr-xr-x
podselect	2.47 KB	-rwxr-xr-x
post-grohtml	238.73 KB	-rwxr-xr-x
pr	82.23 KB	-rwxr-xr-x
pre-grohtml	130.55 KB	-rwxr-xr-x
precat	5.52 KB	-rwxr-xr-x
preunzip	5.52 KB	-rwxr-xr-x
prezip	5.52 KB	-rwxr-xr-x
prezip-bin	11.98 KB	-rwxr-xr-x
printenv	33.4 KB	-rwxr-xr-x
printf	53.64 KB	-rwxr-xr-x
prove	13.24 KB	-rwxr-xr-x
ps	134.75 KB	-rwxr-xr-x
ps2ascii	631 B	-rwxr-xr-x
ps2epsi	2.69 KB	-rwxr-xr-x
ps2pdf	272 B	-rwxr-xr-x
ps2pdf12	215 B	-rwxr-xr-x
ps2pdf13	215 B	-rwxr-xr-x
ps2pdf14	215 B	-rwxr-xr-x
ps2pdfwr	1.07 KB	-rwxr-xr-x
ps2ps	647 B	-rwxr-xr-x
ps2ps2	669 B	-rwxr-xr-x
psql	644.33 KB	-rwxr-xr-x
ptx	78.07 KB	-rwxr-xr-x
pwd	37.5 KB	-rwxr-xr-x
pwdx	12.68 KB	-rwxr-xr-x
python2	7.84 KB	-rwxr-xr-x
python2.7	7.84 KB	-rwxr-xr-x
python3	11.59 KB	-rwxr-xr-x
python3.6	11.59 KB	-rwxr-xr-x
python3.6m	11.59 KB	-rwxr-xr-x
ranlib	61.98 KB	-rwxr-xr-x
raw	16.49 KB	-rwxr-xr-x
readelf	624.54 KB	-rwxr-xr-x
readlink	45.96 KB	-rwxr-xr-x
realpath	50.02 KB	-rwxr-xr-x
recode	47.03 KB	-rwxr-xr-x
reindexdb	70.32 KB	-rwxr-xr-x
rename	16.5 KB	-rwxr-xr-x
renew-dummy-cert	725 B	-rwxr-xr-x
renice	16.46 KB	-rwxr-xr-x
reset	24.76 KB	-rwxr-xr-x
rev	12.45 KB	-rwxr-xr-x
rm	70.47 KB	-rwxr-xr-x
rmdir	45.54 KB	-rwxr-xr-x
rnano	247.94 KB	-rwxr-xr-x
rsync	506.1 KB	-rwxr-xr-x
ruby	11.84 KB	-rwxr-xr-x
run-with-aspell	85 B	-rwxr-xr-x
runcon	37.45 KB	-rwxr-xr-x
rvi	1.13 MB	-rwxr-xr-x
rview	1.13 MB	-rwxr-xr-x
rvim	2.93 MB	-rwxr-xr-x
scalar	2.18 MB	-rwxr-xr-x
scl	36.87 KB	-rwxr-xr-x
scl_enabled	258 B	-rwxr-xr-x
scl_source	1.82 KB	-rwxr-xr-x
scp	102.84 KB	-rwxr-xr-x
screen	482.46 KB	-rwxr-xr-x
script	36.79 KB	-rwxr-xr-x
sdiff	105.33 KB	-rwxr-xr-x
sed	115.48 KB	-rwxr-xr-x
selectorctl	7.6 KB	-rwxr-xr-x
seq	53.52 KB	-rwxr-xr-x
setsid	16.38 KB	-rwxr-xr-x
setterm	45.12 KB	-rwxr-xr-x
sftp	159.73 KB	-rwxr-xr-x
sh	1.1 MB	-rwxr-xr-x
sha1sum	45.63 KB	-rwxr-xr-x
sha224sum	45.66 KB	-rwxr-xr-x
sha256sum	45.66 KB	-rwxr-xr-x
sha384sum	45.66 KB	-rwxr-xr-x
sha512sum	45.66 KB	-rwxr-xr-x
shred	61.94 KB	-rwxr-xr-x
shuf	58.16 KB	-rwxr-xr-x
size	33.25 KB	-rwxr-xr-x
skill	28.8 KB	-rwxr-xr-x
slabtop	20.84 KB	-rwxr-xr-x
sleep	37.47 KB	-rwxr-xr-x
snice	28.8 KB	-rwxr-xr-x
soelim	42.55 KB	-rwxr-xr-x
sort	123.55 KB	-rwxr-xr-x
spell	122 B	-rwxr-xr-x
splain	18.7 KB	-rwxr-xr-x
split	58.13 KB	-rwxr-xr-x
sprof	28.67 KB	-rwxr-xr-x
sqlite3	1.28 MB	-rwxr-xr-x
ssh	757.48 KB	-rwxr-xr-x
ssh-add	346.09 KB	-rwxr-xr-x
ssh-agent	325.56 KB	-rwxr-xr-x
ssh-copy-id	10.44 KB	-rwxr-xr-x
ssh-keygen	427.2 KB	-rwxr-xr-x
ssh-keyscan	428.56 KB	-rwxr-xr-x
stat	86.23 KB	-rwxr-xr-x
stdbuf	49.58 KB	-rwxr-xr-x
strace	1.97 MB	-rwxr-xr-x
stream	11.83 KB	-rwxr-xr-x
strings	37.43 KB	-rwxr-xr-x
strip	240.09 KB	-rwxr-xr-x
stty	77.68 KB	-rwxr-xr-x
sum	45.61 KB	-rwxr-xr-x
sync	37.43 KB	-rwxr-xr-x
tabs	16.55 KB	-rwxr-xr-x
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Code Editor : autom4te

#! /usr/bin/perl -w
# -*- perl -*-
# Generated from autom4te.in; do not edit by hand.

eval 'case $# in 0) exec /usr/bin/perl -S "$0";; *) exec /usr/bin/perl -S "$0" "$@";; esac'
    if 0;

# autom4te - Wrapper around M4 libraries.
# Copyright (C) 2001-2003, 2005-2012 Free Software Foundation, Inc.

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

BEGIN
{
  my $pkgdatadir = $ENV{'autom4te_perllibdir'} || '/usr/share/autoconf';
  unshift @INC, $pkgdatadir;

# Override SHELL.  On DJGPP SHELL may not be set to a shell
  # that can handle redirection and quote arguments correctly,
  # e.g.: COMMAND.COM.  For DJGPP always use the shell that configure
  # has detected.
  $ENV{'SHELL'} = '/bin/sh' if ($^O eq 'dos');
}

use Autom4te::C4che;
use Autom4te::ChannelDefs;
use Autom4te::Channels;
use Autom4te::FileUtils;
use Autom4te::General;
use Autom4te::XFile;
use File::Basename;
use strict;

# Data directory.
my $pkgdatadir = $ENV{'AC_MACRODIR'} || '/usr/share/autoconf';

# $LANGUAGE{LANGUAGE} -- Automatic options for LANGUAGE.
my %language;

my $output = '-';

# Mode of the output file except for traces.
my $mode = "0666";

# If melt, don't use frozen files.
my $melt = 0;

# Names of the cache directory, cache directory index, trace cache
# prefix, and output cache prefix.  And the IO object for the index.
my $cache;
my $icache;
my $tcache;
my $ocache;
my $icache_file;

my $flock_implemented = 'yes';

# The macros to trace mapped to their format, as specified by the
# user.
my %trace;

# The macros the user will want to trace in the future.
# We need `include' to get the included file, `m4_pattern_forbid' and
# `m4_pattern_allow' to check the output.
#
# FIXME: What about `sinclude'?
my @preselect = ('include',
		 'm4_pattern_allow', 'm4_pattern_forbid',
		 '_m4_warn');

# M4 include path.
my @include;

# Do we freeze?
my $freeze = 0;

# $M4.
my $m4 = $ENV{"M4"} || '/usr/bin/m4';
# Some non-GNU m4's don't reject the --help option, so give them /dev/null.
fatal "need GNU m4 1.4 or later: $m4"
  if system "$m4 --help </dev/null 2>&1 | grep reload-state >/dev/null";

# Set some high recursion limit as the default limit, 250, has already
# been hit with AC_OUTPUT.  Don't override the user's choice.
$m4 .= ' --nesting-limit=1024'
  if " $m4 " !~ / (--nesting-limit(=[0-9]+)?|-L[0-9]*) /;

# @M4_BUILTIN -- M4 builtins and a useful comment.
my @m4_builtin = `echo dumpdef | $m4 2>&1 >/dev/null`;
map { s/:.*//;s/\W// } @m4_builtin;

# %M4_BUILTIN_ALTERNATE_NAME
# --------------------------
# The builtins are renamed, e.g., `define' is renamed `m4_define'.
# So map `define' to `m4_define' and conversely.
# Some macros don't follow this scheme: be sure to properly map to their
# alternate name too.
#
# FIXME: Trace status of renamed builtins was fixed in M4 1.4.5, which
# we now depend on; do we still need to do this mapping?
#
# So we will merge them, i.e., tracing `BUILTIN' or tracing
# `m4_BUILTIN' will be the same: tracing both, but honoring the
# *last* trace specification.
#
# FIXME: This is not enough: in the output `$0' will be `BUILTIN'
# sometimes and `m4_BUILTIN' at others.  We should return a unique name,
# the one specified by the user.
#
# FIXME: To be absolutely rigorous, I would say that given that we
# _redefine_ divert (instead of _copying_ it), divert and the like
# should not be part of this list.
my %m4_builtin_alternate_name;
@m4_builtin_alternate_name{"$_", "m4_$_"} = ("m4_$_", "$_")
  foreach (grep { !/m4wrap|m4exit|dnl|ifelse|__.*__/ } @m4_builtin);
@m4_builtin_alternate_name{"ifelse", "m4_if"}   = ("m4_if", "ifelse");
@m4_builtin_alternate_name{"m4exit", "m4_exit"} = ("m4_exit", "m4exit");
@m4_builtin_alternate_name{"m4wrap", "m4_wrap"} = ("m4_wrap", "m4wrap");

# $HELP
# -----
$help = "Usage: $0 [OPTION]... [FILES]

Run GNU M4 on the FILES, avoiding useless runs.  Output the traces if tracing,
the frozen file if freezing, otherwise the expansion of the FILES.

If some of the FILES are named \`FILE.m4f\' they are considered to be M4
frozen files of all the previous files (which are therefore not loaded).
If \`FILE.m4f\' is not found, then \`FILE.m4\' will be used, together with
all the previous files.

Some files may be optional, i.e., will only be processed if found in the
include path, but then must end in \`.m4?\';  the question mark is not part of
the actual file name.

Operation modes:
  -h, --help               print this help, then exit
  -V, --version            print version number, then exit
  -v, --verbose            verbosely report processing
  -d, --debug              don\'t remove temporary files
  -o, --output=FILE        save output in FILE (defaults to \`-\', stdout)
  -f, --force              don\'t rely on cached values
  -W, --warnings=CATEGORY  report the warnings falling in CATEGORY
  -l, --language=LANG      specify the set of M4 macros to use
  -C, --cache=DIRECTORY    preserve results for future runs in DIRECTORY
      --no-cache           disable the cache
  -m, --mode=OCTAL         change the non trace output file mode (0666)
  -M, --melt               don\'t use M4 frozen files

Languages include:
  \`Autoconf\'   create Autoconf configure scripts
  \`Autotest\'   create Autotest test suites
  \`M4sh\'       create M4sh shell scripts
  \`M4sugar\'    create M4sugar output

" . Autom4te::ChannelDefs::usage . "

The environment variables \`M4\' and \`WARNINGS\' are honored.

Library directories:
  -B, --prepend-include=DIR  prepend directory DIR to search path
  -I, --include=DIR          append directory DIR to search path

Tracing:
  -t, --trace=MACRO[:FORMAT]  report the MACRO invocations
  -p, --preselect=MACRO       prepare to trace MACRO in a future run

Freezing:
  -F, --freeze   produce an M4 frozen state file for FILES

FORMAT defaults to \`\$f:\$l:\$n:\$%\', and can use the following escapes:
  \$\$     literal \$
  \$f     file where macro was called
  \$l     line where macro was called
  \$d     nesting depth of macro call
  \$n     name of the macro
  \$NUM   argument NUM, unquoted and with newlines
  \$SEP\@  all arguments, with newlines, quoted, and separated by SEP
  \$SEP*  all arguments, with newlines, unquoted, and separated by SEP
  \$SEP%  all arguments, without newlines, unquoted, and separated by SEP
SEP can be empty for the default (comma for \@ and *, colon for %),
a single character for that character, or {STRING} to use a string.

Report bugs to <bug-autoconf\@gnu.org>.
GNU Autoconf home page: <http://www.gnu.org/software/autoconf/>.
General help using GNU software: <http://www.gnu.org/gethelp/>.
";

# $VERSION
# --------
$version =  <<"EOF";
autom4te (GNU Autoconf) 2.69
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+/Autoconf: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>, <http://gnu.org/licenses/exceptions.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Akim Demaille.
EOF

## ---------- ##
## Routines.  ##
## ---------- ##

# $OPTION
# files_to_options (@FILE)
# ------------------------
# Transform Autom4te conventions (e.g., using foo.m4f to designate a frozen
# file) into a suitable command line for M4 (e.g., using --reload-state).
# parse_args guarantees that we will see at most one frozen file, and that
# if a frozen file is present, it is the first argument.
sub files_to_options (@)
{
  my (@file) = @_;
  my @res;
  foreach my $file (@file)
    {
      my $arg = shell_quote ($file);
      if ($file =~ /\.m4f$/)
	{
	  $arg = "--reload-state=$arg";
	  # If the user downgraded M4 from 1.6 to 1.4.x after freezing
	  # the file, then we ensure the frozen __m4_version__ will
	  # not cause m4_init to make the wrong decision about the
	  # current M4 version.
	  $arg .= " --undefine=__m4_version__"
	    unless grep {/__m4_version__/} @m4_builtin;
	}
      push @res, $arg;
    }
  return join ' ', @res;
}

# load_configuration ($FILE)
# --------------------------
# Load the configuration $FILE.
sub load_configuration ($)
{
  my ($file) = @_;
  use Text::ParseWords;

my $cfg = new Autom4te::XFile ("< " . open_quote ($file));
  my $lang;
  while ($_ = $cfg->getline)
    {
      chomp;
      # Comments.
      next
	if /^\s*(\#.*)?$/;

my @words = shellwords ($_);
      my $type = shift @words;
      if ($type eq 'begin-language:')
	{
	  fatal "$file:$.: end-language missing for: $lang"
	    if defined $lang;
	  $lang = lc $words[0];
	}
      elsif ($type eq 'end-language:')
	{
	  error "$file:$.: end-language mismatch: $lang"
	    if $lang ne lc $words[0];
	  $lang = undef;
	}
      elsif ($type eq 'args:')
	{
	  fatal "$file:$.: no current language"
	    unless defined $lang;
	  push @{$language{$lang}}, @words;
	}
      else
	{
	  error "$file:$.: unknown directive: $type";
	}
    }
}

# parse_args ()
# -------------
# Process any command line arguments.
sub parse_args ()
{
  # We want to look for the early options, which should not be found
  # in the configuration file.  Prepend to the user arguments.
  # Perform this repeatedly so that we can use --language in language
  # definitions.  Beware that there can be several --language
  # invocations.
  my @language;
  do {
    @language = ();
    use Getopt::Long;
    Getopt::Long::Configure ("pass_through", "permute");
    GetOptions ("l|language=s" => \@language);

foreach (@language)
      {
	error "unknown language: $_"
	  unless exists $language{lc $_};
	unshift @ARGV, @{$language{lc $_}};
      }
  } while @language;

# --debug is useless: it is parsed below.
  if (exists $ENV{'AUTOM4TE_DEBUG'})
    {
      print STDERR "$me: concrete arguments:\n";
      foreach my $arg (@ARGV)
	{
	  print STDERR "| $arg\n";
	}
    }

# Process the arguments for real this time.
  my @trace;
  my @prepend_include;
  parse_WARNINGS;
  getopt
    (
     # Operation modes:
     "o|output=s"   => \$output,
     "W|warnings=s" => \&parse_warnings,
     "m|mode=s"     => \$mode,
     "M|melt"       => \$melt,

# Library directories:
     "B|prepend-include=s" => \@prepend_include,
     "I|include=s"         => \@include,

# Tracing:
     # Using a hash for traces is seducing.  Unfortunately, upon `-t FOO',
     # instead of mapping `FOO' to undef, Getopt maps it to `1', preventing
     # us from distinguishing `-t FOO' from `-t FOO=1'.  So let's do it
     # by hand.
     "t|trace=s"     => \@trace,
     "p|preselect=s" => \@preselect,

# Freezing.
     "F|freeze" => \$freeze,

# Caching.
     "C|cache=s" => \$cache,
     "no-cache"  => sub { $cache = undef; },
    );

fatal "too few arguments
Try `$me --help' for more information."
    unless @ARGV;

# Freezing:
  # We cannot trace at the same time (well, we can, but it sounds insane).
  # And it implies melting: there is risk not to update properly using
  # old frozen files, and worse yet: we could load a frozen file and
  # refreeze it!  A sort of caching :)
  fatal "cannot freeze and trace"
    if $freeze && @trace;
  $melt = 1
    if $freeze;

# Names of the cache directory, cache directory index, trace cache
  # prefix, and output cache prefix.  If the cache is not to be
  # preserved, default to a temporary directory (automatically removed
  # on exit).
  $cache = $tmp
    unless $cache;
  $icache = "$cache/requests";
  $tcache = "$cache/traces.";
  $ocache = "$cache/output.";

# Normalize the includes: the first occurrence is enough, several is
  # a pain since it introduces a useless difference in the path which
  # invalidates the cache.  And strip `.' which is implicit and always
  # first.
  @include = grep { !/^\.$/ } uniq (reverse(@prepend_include), @include);

# Convert @trace to %trace, and work around the M4 builtins tracing
  # problem.
  # The default format is `$f:$l:$n:$%'.
  foreach (@trace)
    {
      /^([^:]+)(?::(.*))?$/ms;
      $trace{$1} = defined $2 ? $2 : '$f:$l:$n:$%';
      $trace{$m4_builtin_alternate_name{$1}} = $trace{$1}
	if exists $m4_builtin_alternate_name{$1};
    }

# Work around the M4 builtins tracing problem for @PRESELECT.
  # FIXME: Is this still needed, now that we rely on M4 1.4.5?
  push (@preselect,
	map { $m4_builtin_alternate_name{$_} }
	grep { exists $m4_builtin_alternate_name{$_} } @preselect);

# If we find frozen files, then all the files before it are
  # discarded: the frozen file is supposed to include them all.
  #
  # We don't want to depend upon m4's --include to find the top level
  # files, so we use `find_file' here.  Try to get a canonical name,
  # as it's part of the key for caching.  And some files are optional
  # (also handled by `find_file').
  my @argv;
  foreach (@ARGV)
    {
      if ($_ eq '-')
	{
	  push @argv, $_;
	}
      elsif (/\.m4f$/)
	{
	  # Frozen files are optional => pass a `?' to `find_file'.
	  my $file = find_file ("$_?", @include);
	  if (!$melt && $file)
	    {
	      @argv = ($file);
	    }
	  else
	    {
	      s/\.m4f$/.m4/;
	      push @argv, find_file ($_, @include);
	    }
	}
      else
	{
	  my $file = find_file ($_, @include);
	  push @argv, $file
	    if $file;
	}
    }
  @ARGV = @argv;
}

# handle_m4 ($REQ, @MACRO)
# ------------------------
# Run m4 on the input files, and save the traces on the @MACRO.
sub handle_m4 ($@)
{
  my ($req, @macro) = @_;

# GNU m4 appends when using --debugfile/--error-output.
  unlink ($tcache . $req->id . "t");

# Run m4.
  #
  # We don't output directly to the cache files, to avoid problems
  # when we are interrupted (that leaves corrupted files).
  xsystem ("$m4 --gnu"
	   . join (' --include=', '', map { shell_quote ($_) } @include)
	   . ' --debug=aflq'
	   . (!exists $ENV{'AUTOM4TE_NO_FATAL'} ? ' --fatal-warning' : '')
	   . " --debugfile=" . shell_quote ("$tcache" . $req->id . "t")
	   . join (' --trace=', '', map { shell_quote ($_) } sort @macro)
	   . " " . files_to_options (@ARGV)
	   . " > " . shell_quote ("$ocache" . $req->id . "t"));

# Everything went ok: preserve the outputs.
  foreach my $file (map { $_ . $req->id } ($tcache, $ocache))
    {
      use File::Copy;
      move ("${file}t", "$file")
	or fatal "cannot rename ${file}t as $file: $!";
    }
}

# warn_forbidden ($WHERE, $WORD, %FORBIDDEN)
# ------------------------------------------
# $WORD is forbidden.  Warn with a dedicated error message if in
# %FORBIDDEN, otherwise a simple `error: possibly undefined macro'
# will do.
my $first_warn_forbidden = 1;
sub warn_forbidden ($$%)
{
  my ($where, $word, %forbidden) = @_;
  my $message;

for my $re (sort keys %forbidden)
    {
      if ($word =~ $re)
	{
	  $message = $forbidden{$re};
	  last;
	}
    }
  $message ||= "possibly undefined macro: $word";
  warn "$where: error: $message\n";
  if ($first_warn_forbidden)
    {
      warn <<EOF;
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
EOF
      $first_warn_forbidden = 0;
    }
}

# handle_output ($REQ, $OUTPUT)
# -----------------------------
# Run m4 on the input files, perform quadrigraphs substitution, check for
# forbidden tokens, and save into $OUTPUT.
sub handle_output ($$)
{
  my ($req, $output) = @_;

verb "creating $output";

# Load the forbidden/allowed patterns.
  handle_traces ($req, "$tmp/patterns",
		 ('m4_pattern_forbid' => 'forbid:$1:$2',
		  'm4_pattern_allow'  => 'allow:$1'));
  my @patterns = new Autom4te::XFile ("< " . open_quote ("$tmp/patterns"))->getlines;
  chomp @patterns;
  my %forbidden =
    map { /^forbid:([^:]+):.+$/ => /^forbid:[^:]+:(.+)$/ } @patterns;
  my $forbidden = join ('|', map { /^forbid:([^:]+)/ } @patterns) || "^\$";
  my $allowed   = join ('|', map { /^allow:([^:]+)/  } @patterns) || "^\$";

verb "forbidden tokens: $forbidden";
  verb "forbidden token : $_ => $forbidden{$_}"
    foreach (sort keys %forbidden);
  verb "allowed   tokens: $allowed";

# Read the (cached) raw M4 output, produce the actual result.  We
  # have to use the 2nd arg to have Autom4te::XFile honor the third, but then
  # stdout is to be handled by hand :(.  Don't use fdopen as it means
  # we will close STDOUT, which we already do in END.
  my $out = new Autom4te::XFile;
  if ($output eq '-')
    {
      $out->open (">$output");
    }
  else
    {
      $out->open($output, O_CREAT | O_WRONLY | O_TRUNC, oct ($mode));
    }
  fatal "cannot create $output: $!"
    unless $out;
  my $in = new Autom4te::XFile ("< " . open_quote ($ocache . $req->id));

my %prohibited;
  my $res;
  while ($_ = $in->getline)
    {
      s/\s+$//;
      s/__oline__/$./g;
      s/\@<:\@/[/g;
      s/\@:>\@/]/g;
      s/\@\{:\@/(/g;
      s/\@:\}\@/)/g;
      s/\@S\|\@/\$/g;
      s/\@%:\@/#/g;

$res = $_;

# Don't complain in comments.  Well, until we have something
      # better, don't consider `#include' etc. are comments.
      s/\#.*//
	unless /^\#\s*(if|include|endif|ifdef|ifndef|define)\b/;
      foreach (split (/\W+/))
	{
	  $prohibited{$_} = $.
	    if !/^$/ && /$forbidden/o && !/$allowed/o && ! exists $prohibited{$_};
	}

# Performed *last*: the empty quadrigraph.
      $res =~ s/\@&t\@//g;

print $out "$res\n";
    }

$out->close();

# If no forbidden words, we're done.
  return
    if ! %prohibited;

# Locate the forbidden words in the last input file.
  # This is unsatisfying but...
  $exit_code = 1;
  if ($ARGV[$#ARGV] ne '-')
    {
      my $prohibited = '\b(' . join ('|', keys %prohibited) . ')\b';
      my $file = new Autom4te::XFile ("< " . open_quote ($ARGV[$#ARGV]));

while ($_ = $file->getline)
	{
	  # Don't complain in comments.  Well, until we have something
	  # better, don't consider `#include' etc. to be comments.
	  s/\#.*//
	    unless /^\#(if|include|endif|ifdef|ifndef|define)\b/;

# Complain once per word, but possibly several times per line.
	  while (/$prohibited/)
	    {
	      my $word = $1;
	      warn_forbidden ("$ARGV[$#ARGV]:$.", $word, %forbidden);
	      delete $prohibited{$word};
	      # If we're done, exit.
	      return
		if ! %prohibited;
	      $prohibited = '\b(' . join ('|', keys %prohibited) . ')\b';
	    }
	}
    }
  warn_forbidden ("$output:$prohibited{$_}", $_, %forbidden)
    foreach (sort { $prohibited{$a} <=> $prohibited{$b} } keys %prohibited);
}

## --------------------- ##
## Handling the traces.  ##
## --------------------- ##

# $M4_MACRO
# trace_format_to_m4 ($FORMAT)
# ----------------------------
# Convert a trace $FORMAT into a M4 trace processing macro's body.
sub trace_format_to_m4 ($)
{
  my ($format) = @_;
  my $underscore = $_;
  my %escape = (# File name.
		'f' => '$1',
		# Line number.
		'l' => '$2',
		# Depth.
		'd' => '$3',
		# Name (also available as $0).
		'n' => '$4',
		# Escaped dollar.
		'$' => '$');

my $res = '';
  $_ = $format;
  while ($_)
    {
      # $n -> $(n + 4)
      if (s/^\$(\d+)//)
	{
	  $res .= "\$" . ($1 + 4);
	}
      # $x, no separator given.
      elsif (s/^\$([fldn\$])//)
	{
	  $res .= $escape{$1};
	}
      # $.x or ${sep}x.
      elsif (s/^\$\{([^}]*)\}([@*%])//
	    || s/^\$(.?)([@*%])//)
	{
	  # $@, list of quoted effective arguments.
	  if ($2 eq '@')
	    {
	      $res .= ']at_at([' . ($1 ? $1 : ',') . '], $@)[';
	    }
	  # $*, list of unquoted effective arguments.
	  elsif ($2 eq '*')
	    {
	      $res .= ']at_star([' . ($1 ? $1 : ',') . '], $@)[';
	    }
	  # $%, list of flattened unquoted effective arguments.
	  elsif ($2 eq '%')
	    {
	      $res .= ']at_percent([' . ($1 ? $1 : ':') . '], $@)[';
	    }
	}
      elsif (/^(\$.)/)
	{
	  error "invalid escape: $1";
	}
      else
	{
	  s/^([^\$]+)//;
	  $res .= $1;
	}
    }

$_ = $underscore;
  return '[[' . $res . ']]';
}

# handle_traces($REQ, $OUTPUT, %TRACE)
# ------------------------------------
# We use M4 itself to process the traces.  But to avoid name clashes when
# processing the traces, the builtins are disabled, and moved into `at_'.
# Actually, all the low level processing macros are in `at_' (and `_at_').
# To avoid clashes between user macros and `at_' macros, the macros which
# implement tracing are in `AT_'.
#
# Having $REQ is needed to neutralize the macros which have been traced,
# but are not wanted now.
sub handle_traces ($$%)
{
  my ($req, $output, %trace) = @_;

verb "formatting traces for `$output': " . join (', ', sort keys %trace);

# Processing the traces.
  my $trace_m4 = new Autom4te::XFile ("> " . open_quote ("$tmp/traces.m4"));

$_ = <<'EOF';
  divert(-1)
  changequote([, ])
  # _at_MODE(SEPARATOR, ELT1, ELT2...)
  # ----------------------------------
  # List the elements, separating then with SEPARATOR.
  # MODE can be:
  #  `at'       -- the elements are enclosed in brackets.
  #  `star'     -- the elements are listed as are.
  #  `percent'  -- the elements are `flattened': spaces are singled out,
  #                and no new line remains.
  define([_at_at],
  [at_ifelse([$#], [1], [],
	     [$#], [2], [[[$2]]],
	     [[[$2]][$1]$0([$1], at_shift(at_shift($@)))])])

define([_at_percent],
  [at_ifelse([$#], [1], [],
	     [$#], [2], [at_flatten([$2])],
	     [at_flatten([$2])[$1]$0([$1], at_shift(at_shift($@)))])])

define([_at_star],
  [at_ifelse([$#], [1], [],
	     [$#], [2], [[$2]],
	     [[$2][$1]$0([$1], at_shift(at_shift($@)))])])

# FLATTEN quotes its result.
  # Note that the second pattern is `newline, tab or space'.  Don't lose
  # the tab!
  define([at_flatten],
  [at_patsubst(at_patsubst([[[$1]]], [\\\n]), [[\n\t ]+], [ ])])

define([at_args],    [at_shift(at_shift(at_shift(at_shift(at_shift($@)))))])
  define([at_at],      [_$0([$1], at_args($@))])
  define([at_percent], [_$0([$1], at_args($@))])
  define([at_star],    [_$0([$1], at_args($@))])

EOF
  s/^  //mg;s/\\t/\t/mg;s/\\n/\n/mg;
  print $trace_m4 $_;

# If you trace `define', then on `define([m4_exit], defn([m4exit])' you
  # will produce
  #
  #    AT_define([m4sugar.m4], [115], [1], [define], [m4_exit], <m4exit>)
  #
  # Since `<m4exit>' is not quoted, the outer m4, when processing
  # `trace.m4' will exit prematurely.  Hence, move all the builtins to
  # the `at_' name space.

print $trace_m4 "# Copy the builtins.\n";
  map { print $trace_m4 "define([at_$_], defn([$_]))\n" } @m4_builtin;
  print $trace_m4 "\n";

print $trace_m4 "# Disable them.\n";
  map { print $trace_m4 "at_undefine([$_])\n" } @m4_builtin;
  print $trace_m4 "\n";

# Neutralize traces: we don't want traces of cached requests (%REQUEST).
  print $trace_m4
   "## -------------------------------------- ##\n",
   "## By default neutralize all the traces.  ##\n",
   "## -------------------------------------- ##\n",
   "\n";
  print $trace_m4 "at_define([AT_$_], [at_dnl])\n"
    foreach (sort keys %{$req->macro});
  print $trace_m4 "\n";

# Implement traces for current requests (%TRACE).
  print $trace_m4
    "## ------------------------- ##\n",
    "## Trace processing macros.  ##\n",
    "## ------------------------- ##\n",
    "\n";
  foreach (sort keys %trace)
    {
      # Trace request can be embed \n.
      (my $comment = "Trace $_:$trace{$_}") =~ s/^/\# /;
      print $trace_m4 "$comment\n";
      print $trace_m4 "at_define([AT_$_],\n";
      print $trace_m4 trace_format_to_m4 ($trace{$_}) . ")\n\n";
    }
  print $trace_m4 "\n";

# Reenable output.
  print $trace_m4 "at_divert(0)at_dnl\n";

# Transform the traces from m4 into an m4 input file.
  # Typically, transform:
  #
  # | m4trace:configure.ac:3: -1- AC_SUBST([exec_prefix], [NONE])
  #
  # into
  #
  # | AT_AC_SUBST([configure.ac], [3], [1], [AC_SUBST], [exec_prefix], [NONE])
  #
  # Pay attention that the file name might include colons, if under DOS
  # for instance, so we don't use `[^:]+'.
  my $traces = new Autom4te::XFile ("< " . open_quote ($tcache . $req->id));
  while ($_ = $traces->getline)
    {
      # Trace with arguments, as the example above.  We don't try
      # to match the trailing parenthesis as it might be on a
      # separate line.
      s{^m4trace:(.+):(\d+): -(\d+)- ([^(]+)\((.*)$}
       {AT_$4([$1], [$2], [$3], [$4], $5};
      # Traces without arguments, always on a single line.
      s{^m4trace:(.+):(\d+): -(\d+)- ([^)]*)\n$}
       {AT_$4([$1], [$2], [$3], [$4])\n};
      print $trace_m4 "$_";
    }
  $trace_m4->close;

my $in = new Autom4te::XFile ("$m4 " . shell_quote ("$tmp/traces.m4") . " |");
  my $out = new Autom4te::XFile ("> " . open_quote ($output));

# This is dubious: should we really transform the quadrigraphs in
  # traces?  It might break balanced [ ] etc. in the output.  The
  # consensus seems to be that traces are more useful this way.
  while ($_ = $in->getline)
    {
      # It makes no sense to try to transform __oline__.
      s/\@<:\@/[/g;
      s/\@:>\@/]/g;
      s/\@\{:\@/(/g;
      s/\@:\}\@/)/g;
      s/\@S\|\@/\$/g;
      s/\@%:\@/#/g;
      s/\@&t\@//g;
      print $out $_;
    }
}

# $BOOL
# up_to_date ($REQ)
# -----------------
# Are the cache files of $REQ up to date?
# $REQ is `valid' if it corresponds to the request and exists, which
# does not mean it is up to date.  It is up to date if, in addition,
# its files are younger than its dependencies.
sub up_to_date ($)
{
  my ($req) = @_;

return 0
    if ! $req->valid;

my $tfile = $tcache . $req->id;
  my $ofile = $ocache . $req->id;

# We can't answer properly if the traces are not computed since we
  # need to know what other files were included.  Actually, if any of
  # the cache files is missing, we are not up to date.
  return 0
    if ! -f $tfile || ! -f $ofile;

# The youngest of the cache files must be older than the oldest of
  # the dependencies.
  my $tmtime = mtime ($tfile);
  my $omtime = mtime ($ofile);
  my ($file, $mtime) = ($tmtime < $omtime
			? ($ofile, $omtime) : ($tfile, $tmtime));

# We depend at least upon the arguments.
  my @dep = @ARGV;

# stdin is always out of date.
  if (grep { $_ eq '-' } @dep)
    { return 0 }

# Files may include others.  We can use traces since we just checked
  # if they are available.
  handle_traces ($req, "$tmp/dependencies",
		 ('include'    => '$1',
		  'm4_include' => '$1'));
  my $deps = new Autom4te::XFile ("< " . open_quote ("$tmp/dependencies"));
  while ($_ = $deps->getline)
    {
      chomp;
      my $file = find_file ("$_?", @include);
      # If a file which used to be included is no longer there, then
      # don't say it's missing (it might no longer be included).  But
      # of course, that causes the output to be outdated (as if the
      # time stamp of that missing file was newer).
      return 0
	if ! $file;
      push @dep, $file;
    }

# If $FILE is younger than one of its dependencies, it is outdated.
  return up_to_date_p ($file, @dep);
}

## ---------- ##
## Freezing.  ##
## ---------- ##

# freeze ($OUTPUT)
# ----------------
sub freeze ($)
{
  my ($output) = @_;

# When processing the file with diversion disabled, there must be no
  # output but comments and empty lines.
  my $result = xqx ("$m4"
		    . ' --fatal-warning'
		    . join (' --include=', '', map { shell_quote ($_) } @include)
		    . ' --define=divert'
		    . " " . files_to_options (@ARGV)
		    . ' </dev/null');
  $result =~ s/#.*\n//g;
  $result =~ s/^\n//mg;

fatal "freezing produced output:\n$result"
    if $result;

# If freezing produces output, something went wrong: a bad `divert',
  # or an improper paren etc.
  xsystem ("$m4"
	   . ' --fatal-warning'
	   . join (' --include=', '', map { shell_quote ($_) } @include)
	   . " --freeze-state=" . shell_quote ($output)
	   . " " . files_to_options (@ARGV)
	   . ' </dev/null');
}

## -------------- ##
## Main program.  ##
## -------------- ##

mktmpdir ('am4t');
load_configuration ($ENV{'AUTOM4TE_CFG'} || "$pkgdatadir/autom4te.cfg");
load_configuration ("$ENV{'HOME'}/.autom4te.cfg")
  if exists $ENV{'HOME'} && -f "$ENV{'HOME'}/.autom4te.cfg";
load_configuration (".autom4te.cfg")
  if -f ".autom4te.cfg";
parse_args;

# Freezing does not involve the cache.
if ($freeze)
  {
    freeze ($output);
    exit $exit_code;
  }

# We need our cache directory.  Don't fail with parallel creation.
if (! -d "$cache")
  {
    mkdir "$cache", 0755
      or -d "$cache"
      or fatal "cannot create $cache: $!";
  }

# Open the index for update, and lock it.  autom4te handles several
# files, but the index is the first and last file to be updated, so
# locking it is sufficient.
$icache_file = new Autom4te::XFile $icache, O_RDWR|O_CREAT;
$icache_file->lock (LOCK_EX)
  if ($flock_implemented eq "yes");

# Read the cache index if available and older than autom4te itself.
# If autom4te is younger, then some structures such as C4che might
# have changed, which would corrupt its processing.
Autom4te::C4che->load ($icache_file)
  if -f $icache && mtime ($icache) > mtime ($0);

# Add the new trace requests.
my $req = Autom4te::C4che->request ('input' => \@ARGV,
				    'path'  => \@include,
				    'macro' => [keys %trace, @preselect]);

# If $REQ's cache files are not up to date, or simply if the user
# discarded them (-f), declare it invalid.
$req->valid (0)
  if $force || ! up_to_date ($req);

# We now know whether we can trust the Request object.  Say it.
verb "the trace request object is:\n" . $req->marshall;

# We need to run M4 if (i) the user wants it (--force), (ii) $REQ is
# invalid.
handle_m4 ($req, keys %{$req->macro})
  if $force || ! $req->valid;

# Issue the warnings each time autom4te was run.
my $separator = "\n" . ('-' x 25) . " END OF WARNING " . ('-' x 25) . "\n\n";
handle_traces ($req, "$tmp/warnings",
	       ('_m4_warn' => "\$1::\$f:\$l::\$2::\$3$separator"));
# Swallow excessive newlines.
for (split (/\n*$separator\n*/o, contents ("$tmp/warnings")))
{
  # The message looks like:
  # | syntax::input.as:5::ouch
  # | ::input.as:4: baz is expanded from...
  # | input.as:2: bar is expanded from...
  # | input.as:3: foo is expanded from...
  # | input.as:5: the top level
  # In particular, m4_warn guarantees that either $stackdump is empty, or
  # it consists of lines where only the last line ends in "top level".
  my ($cat, $loc, $msg, $stacktrace) = split ('::', $_, 4);
  msg $cat, $loc, "warning: $msg",
    partial => ($stacktrace =~ /top level$/) + 0;
  for (split /\n/, $stacktrace)
    {
      my ($loc, $trace) = split (': ', $_, 2);
      msg $cat, $loc, $trace, partial => ($trace !~ /top level$/) + 0;
    }
}

# Now output...
if (%trace)
  {
    # Always produce traces, since even if the output is young enough,
    # there is no guarantee that the traces use the same *format*
    # (e.g., `-t FOO:foo' and `-t FOO:bar' are both using the same M4
    # traces, hence the M4 traces cache is usable, but its formatting
    # will yield different results).
    handle_traces ($req, $output, %trace);
  }
else
  {
    # Actual M4 expansion, if the user wants it, or if $output is old
    # (STDOUT is pretty old).
    handle_output ($req, $output)
      if $force || mtime ($output) < mtime ($ocache . $req->id);
  }

# If we ran up to here, the cache is valid.
$req->valid (1);
Autom4te::C4che->save ($icache_file);

exit $exit_code;

### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
## perl-indent-level: 2
## perl-continued-statement-offset: 2
## perl-continued-brace-offset: 0
## perl-brace-offset: 0
## perl-brace-imaginary-offset: 0
## perl-label-offset: -2
## cperl-indent-level: 2
## cperl-brace-offset: 0
## cperl-continued-brace-offset: 0
## cperl-label-offset: -2
## cperl-extra-newline-before-brace: t
## cperl-merge-trailing-else: nil
## cperl-continued-statement-offset: 2
## End:

${this.title}

Code Editor : autom4te