Bug#1066404: proftpd-dfsg: FTBFS: ld: cannot find -lnsl: No such file or directory

[Lucas Nussbaum]

Source: proftpd-dfsg
Version: 1.3.8.b+dfsg-1
Severity: serious
Justification: FTBFS
Tags: trixie sid ftbfs
User: lucas at debian.org
Usertags: ftbfs-20240313 ftbfs-trixie

Hi,

During a rebuild of all packages in sid, your package failed to build
on amd64.


Relevant part (hopefully):
> gcc -Wdate-time -D_FORTIFY_SOURCE=2 -DHAVE_CONFIG_H  -DLINUX  -I.. -I../include -I../include -I/usr/include/mariadb/mysql -I/usr/include/mariadb -I/usr/include/postgresql -I/usr/include/mariadb -I/usr/include/mariadb/mysql -I/usr/include/postgresql -Wdate-time -D_FORTIFY_SOURCE=2 -g2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wall -fno-omit-frame-pointer -fno-strict-aliasing -Werror=implicit-function-declaration -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>/src=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -c filter.c
> libtool: link: gcc -shared  .libs/mod_wrap.o   -L/usr/lib/x86_64-linux-gnu/ -L/usr/lib/x86_64-linux-gnu -lidn2 -lsodium -lwrap -lnsl  -Wl,-L../lib -Wl,-L../lib -Wl,-z -Wl,relro -Wl,-z -Wl,now -Wl,-z -Wl,relro -Wl,-z -Wl,now   -Wl,-soname -Wl,mod_wrap.so -o .libs/mod_wrap.so
> /usr/bin/ld: cannot find -lnsl: No such file or directory
> collect2: error: ld returned 1 exit status


The full build log is available from:
http://qa-logs.debian.net/2024/03/13/proftpd-dfsg_1.3.8.b+dfsg-1_unstable.log

All bugs filed during this archive rebuild are listed at:
https://bugs.debian.org/cgi-bin/pkgreport.cgi?tag=ftbfs-20240313;users=lucas@debian.org
or:
https://udd.debian.org/bugs/?release=na&merged=ign&fnewerval=7&flastmodval=7&fusertag=only&fusertagtag=ftbfs-20240313&fusertaguser=lucas@debian.org&allbugs=1&cseverity=1&ctags=1&caffected=1#results

A list of current common problems and possible solutions is available at
http://wiki.debian.org/qa.debian.org/FTBFS . You're welcome to contribute!

If you reassign this bug to another package, please mark it as 'affects'-ing
this package. See https://www.debian.org/Bugs/server-control#affects

If you fail to reproduce this, please provide a build log and diff it with mine
so that we can identify if something relevant changed in the meantime.