moonshot-ui: FTBFS: src/moonshot-futils.c:41:34: error: implicit declaration of function ‘getuid’; did you mean ‘getpwuid’? [-Werror=implicit-function-declaration]

Imported from Debian bug http://bugs.debian.org/1066616:

Source: moonshot-ui
Version: 1.1.0+libsecret~2
Severity: serious
Justification: FTBFS
Tags: trixie sid ftbfs
User: <email address hidden>
Usertags: ftbfs-20240313 ftbfs-trixie ftbfs-impfuncdef

Hi,

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

This is most likely caused by a change in dpkg 1.22.6, that enabled
-Werror=implicit-function-declaration. For more information, see
https://wiki.debian.org/qa.debian.org/FTBFS#A2024-03-13_-Werror.3Dimplicit-function-declaration

Relevant part (hopefully):
> gcc -DHAVE_CONFIG_H -I. -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -pthread -I/usr/include/libmount -I/usr/include/blkid -include config.h -DLOCALEDIR=\""/usr/share/locale"\" -DMOONSHOT_FLATSTORE_USERS='"/etc/moonshot/flatstore-users"' -I./libmoonshot -I./libmoonshot -I/usr/include/libsecret-1 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/gio-unix-2.0 -pthread -DMOONSHOT_DBUS_BUS_CONF='"/usr/share/moonshot-ui/dbus/org.janet.Moonshot.conf"' -DMOONSHOT_DBUS_DAEMON='"/usr/bin/dbus-daemon"' -Wdate-time -D_FORTIFY_SOURCE=2 -g -O0 -Wall -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -c -o examples/client-client.o `test -f 'examples/client.c' || echo './'`examples/client.c
> src/moonshot-futils.c: In function ‘GetUserName’:
> src/moonshot-futils.c:41:34: error: implicit declaration of function ‘getuid’; did you mean ‘getpwuid’? [-Werror=implicit-function-declaration]
> 41 | struct passwd *pwd = getpwuid(getuid());
> | ^~~~~~
> | getpwuid
> examples/client.c:36:5: warning: second argument of ‘main’ should be ‘char **’ [-Wmain]
> 36 | int main (int argc,
> | ^~~~
> cc1: some warnings being treated as errors
> make[4]: *** [Makefile:1645: src/moonshot-moonshot-futils.o] Error 1

The full build log is available from:
http://qa-logs.debian.net/2024/03/13/moonshot-ui_1.1.0+libsecret~2_unstable.log

All bugs filed during this archive rebuild are listed at:
https://bugs.debian.org/cgi-bin/pkgreport.cgi?tag=ftbfs-20240313;<email address hidden>
or:
https://udd.debian.org/bugs/?release=na&merged=ign&fnewerval=7&flastmodval=7&fusertag=only&fusertagtag=ftbfs-20240313&<email address hidden>&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.