Bug#1086251: proftpd-dev: #include <attr/xattr.h> breaks several packages

[Santiago Vila]

Package: proftpd-dev
Version: 1.3.8.b+dfsg-2
Severity: grave

Dear maintainer:

Package proftpd-mod-clamav and many others currently FTBFS in this way:

ck-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wall -fno-omit-frame-po
inter -fno-strict-aliasing -Werror=implicit-function-declaration -DPR_SHARED_MODULE -I. -I/usr/include/proftpd -c mod_
clamav.c  -fPIC -DPIC -o .libs/mod_clamav.o
In file included from /usr/include/proftpd/conf.h:105,
                  from mod_clamav.c:30:
/usr/include/proftpd/fsio.h:41:13: fatal error: attr/xattr.h: No such file or directory
    41 | #   include <attr/xattr.h>
       |             ^~~~~~~~~~~~~~
compilation terminated.
prxs: error executing command (1)
make[1]: *** [debian/rules:13: override_dh_auto_build] Error 1
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:10: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2


I'm reporting this against proftpd-dev because it's the package
including /usr/include/proftpd/fsio.h.

The following packages are also affected:

proftpd-mod-autohost
proftpd-mod-case
proftpd-mod-clamav
proftpd-mod-counter
proftpd-mod-fsync
proftpd-mod-geoip2
proftpd-mod-kafka
proftpd-mod-msg
proftpd-mod-proxy
proftpd-mod-sftp-ldap
proftpd-mod-statsd
proftpd-mod-tar
proftpd-mod-vroot

Thanks.