I just installed autoscan version 2.21 (on guixSD), and it gave me this
warning in a recently un-tar-ed linphone.tar.gz directory.
#BEGIN_SRC sh
autoscan
#END_SRC
Unescaped left brace in regex is deprecated here (and will be fatal in Perl
5.30), passed through in regex; marked by <-- HERE in m/\${ <-- HERE [^\}]*}/
at /home/joshua/.guix-profile/bin/autoscan line 361.
configure.ac: warning: missing AC_CHECK_FUNCS([__argz_count]) wanted by:
intl/l10nflist.c:323
configure.ac: warning: missing AC_CHECK_FUNCS([__argz_next]) wanted by:
intl/l10nflist.c:371
configure.ac: warning: missing AC_CHECK_FUNCS([__argz_stringify]) wanted
by: intl/l10nflist.c:248
configure.ac: warning: missing AC_CHECK_FUNCS([atexit]) wanted by:
gtk/chat.c:54
configure.ac: warning: missing AC_CHECK_FUNCS([dup2]) wanted by:
console/shell.c:195
configure.ac: warning: missing AC_CHECK_FUNCS([inet_ntoa]) wanted by:
coreapi/misc.c:415
configure.ac: warning: missing AC_CHECK_FUNCS([localtime_r]) wanted by:
gtk/main.c:852
configure.ac: warning: missing AC_CHECK_FUNCS([memmove]) wanted by:
coreapi/linphonecall.c:4770
configure.ac: warning: missing AC_CHECK_FUNCS([mempcpy]) wanted by:
intl/localealias.c:213
configure.ac: warning: missing AC_CHECK_FUNCS([memset]) wanted by:
gtk/status_notifier.c:458
configure.ac: warning: missing AC_CHECK_FUNCS([mkdir]) wanted by:
gtk/logging.c:103
configure.ac: warning: missing AC_CHECK_FUNCS([munmap]) wanted by:
intl/loadmsgcat.c:1005
configure.ac: warning: missing AC_CHECK_FUNCS([nl_langinfo]) wanted by:
coreapi/sqlite3_bctbx_vfs.c:272
configure.ac: warning: missing AC_CHECK_FUNCS([pow]) wanted by:
coreapi/linphonecall.c:2859
configure.ac: warning: missing AC_CHECK_FUNCS([putenv]) wanted by:
intl/cat-compat.c:199
configure.ac: warning: missing AC_CHECK_FUNCS([realpath]) wanted by:
coreapi/lpconfig.c:103
configure.ac: warning: missing AC_CHECK_FUNCS([regcomp]) wanted by:
coreapi/account_creator.c:262
configure.ac: warning: missing AC_CHECK_FUNCS([setenv]) wanted by:
intl/cat-compat.c:196
configure.ac: warning: missing AC_CHECK_FUNCS([setlocale]) wanted by:
gtk/main.c:2187
configure.ac: warning: missing AC_CHECK_FUNCS([socket]) wanted by:
coreapi/misc.c:296
configure.ac: warning: missing AC_CHECK_FUNCS([strcasecmp]) wanted by:
gtk/friendlist.c:645
configure.ac: warning: missing AC_CHECK_FUNCS([strchr]) wanted by:
gtk/support.c:218
configure.ac: warning: missing AC_CHECK_FUNCS([strcspn]) wanted by:
intl/loadmsgcat.c:800
configure.ac: warning: missing AC_CHECK_FUNCS([strdup]) wanted by:
gtk/main.c:196
configure.ac: warning: missing AC_CHECK_FUNCS([strerror]) wanted by:
gtk/singleinstance.c:82
configure.ac: warning: missing AC_CHECK_FUNCS([strncasecmp]) wanted by:
tools/generator.cc:213
configure.ac: warning: missing AC_CHECK_FUNCS([strpbrk]) wanted by:
coreapi/linphonecore.c:993
configure.ac: warning: missing AC_CHECK_FUNCS([strrchr]) wanted by:
gtk/main.c:198
configure.ac: warning: missing AC_CHECK_FUNCS([strstr]) wanted by:
gtk/support.c:144
configure.ac: warning: missing AC_CHECK_FUNCS([strtol]) wanted by:
console/linphonec.c:1292
configure.ac: warning: missing AC_CHECK_FUNCS([strtoull]) wanted by:
coreapi/proxy.c:174
configure.ac: warning: missing AC_CHECK_HEADERS([argz.h]) wanted by:
intl/l10nflist.c:33
configure.ac: warning: missing AC_CHECK_HEADERS([fcntl.h]) wanted by:
console/wav2raw.c:8
configure.ac: warning: missing AC_CHECK_HEADERS([langinfo.h]) wanted by:
intl/loadmsgcat.c:61
configure.ac: warning: missing AC_CHECK_HEADERS([libintl.h]) wanted by:
gtk/linphone.h:58
configure.ac: warning: missing AC_CHECK_HEADERS([limits.h]) wanted by:
build/wp8/zlib/zconf.h:397
configure.ac: warning: missing AC_CHECK_HEADERS([locale.h]) wanted by:
gtk/main.c:55
configure.ac: warning: missing AC_CHECK_HEADERS([malloc.h]) wanted by:
intl/cat-compat.c:30
configure.ac: warning: missing AC_CHECK_HEADERS([netdb.h]) wanted by:
console/linphonec.c:51
configure.ac: warning: missing AC_CHECK_HEADERS([nl_types.h]) wanted by:
intl/cat-compat.c:35
configure.ac: warning: missing AC_CHECK_HEADERS([stddef.h]) wanted by:
build/wp8/zlib/zconf.h:435
configure.ac: warning: missing AC_CHECK_HEADERS([stdio_ext.h]) wanted by:
intl/localealias.c:33
configure.ac: warning: missing AC_CHECK_HEADERS([sys/ioctl.h]) wanted by:
daemon/daemon.cc:22
configure.ac: warning: missing AC_CHECK_HEADERS([sys/socket.h]) wanted by:
console/linphonec.c:49
configure.ac: warning: missing AC_CHECK_HEADERS([sys/time.h]) wanted by:
console/linphonec.c:50
configure.ac: warning: missing AC_CHECK_HEADERS([wchar.h]) wanted by:
include/MSVC/stdint.h:52
configure.ac: warning: missing AC_CHECK_HEADER_STDBOOL wanted by:
wrappers/cpp/object.cc:63
configure.ac: warning: missing AC_FUNC_ALLOCA wanted by:
intl/localealias.c:42
configure.ac: warning: missing AC_FUNC_FORK wanted by: console/shell.c:179
configure.ac: warning: missing AC_FUNC_MALLOC wanted by:
wrappers/cpp/object.cc:49
configure.ac: warning: missing AC_FUNC_MKTIME wanted by:
coreapi/call_log.c:53
configure.ac: warning: missing AC_FUNC_MMAP wanted by: intl/loadmsgcat.c:953
configure.ac: warning: missing AC_FUNC_REALLOC wanted by:
intl/localealias.c:312
configure.ac: warning: missing AC_PATH_X wanted by: console/linphonec.c:74
configure.ac: warning: missing AC_PROG_RANLIB wanted by: ltmain.sh:3772
configure.ac: warning: missing AC_PROG_YACC wanted by: intl/Makefile.in:51
configure.ac: warning: missing AC_TYPE_INT16_T wanted by:
include/MSVC/stdint.h:76
configure.ac: warning: missing AC_TYPE_INT32_T wanted by:
include/MSVC/stdint.h:77
configure.ac: warning: missing AC_TYPE_INT64_T wanted by:
include/linphone/dictionary.h:45
configure.ac: warning: missing AC_TYPE_INT8_T wanted by:
include/MSVC/stdint.h:75
configure.ac: warning: missing AC_TYPE_OFF_T wanted by:
coreapi/sqlite3_bctbx_vfs.c:80
configure.ac: warning: missing AC_TYPE_PID_T wanted by:
gtk/status_notifier.c:30
configure.ac: warning: missing AC_TYPE_SIZE_T wanted by: gtk/update.c:26
configure.ac: warning: missing AC_TYPE_SSIZE_T wanted by: coreapi/misc.c:399
configure.ac: warning: missing AC_TYPE_UINT16_T wanted by:
include/MSVC/stdint.h:79
configure.ac: warning: missing AC_TYPE_UINT32_T wanted by:
include/linphone/chat.h:261
configure.ac: warning: missing AC_TYPE_UINT64_T wanted by:
include/linphone/call_stats.h:104
configure.ac: warning: missing AC_TYPE_UINT8_T wanted by:
gtk/singleinstance.c:66
A wise person an the guix mailing list told me this, when I showed him
the error:
The regexp in question is
s/\${[^\}]*}//g;
Perl is complaining because perl regexp use curly braces to specify a range of
valid repeats.
Maybe the easiest way to understand it is that the following equivalences hold
in regexps:
? is equivalent to {0,1}
+ is equivalent to {1,}
* is equivalent to {0,}
The above (at the end of the regexp "\${[^\}]*}") probably means a literal curly
brace--but they don't escape it - hence the warning.
It's only a warning because no valid repeat range can start with a closing curly
brace.
So perl can still figure out what you meant.
But it's obviously not recommended to use unescaped closing curly braces to
match a literal closing curly brace regardless.
Thanks,
--
Joshua Branson
Sent from Emacs and Gnus
