epic5: FTBFS: functions.c:7547:15: error: implicit declaration of function ‘strptime’; did you mean ‘strftime’? [-Werror=implicit-function-declaration]

[Dan Bungert]

Imported from Debian bug http://bugs.debian.org/1066505:

Source: epic5
Version: 2.1.6-1
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 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -I./../include -I../include -c functions.c
> functions.c: In function ‘function_strptime’:
> functions.c:7547:15: error: implicit declaration of function ‘strptime’; did you mean ‘strftime’? [-Werror=implicit-function-declaration]
> 7547 | if (!(strptime(input, format, &timeptr)))
> | ^~~~~~~~
> | strftime
> functions.c: In function ‘function_realpath’:
> functions.c:6496:14: warning: ‘normalize_filename’ accessing 4097 bytes in a region of size 4096 [-Wstringop-overflow=]
> 6496 | if (!normalize_filename(input, resolvedname))
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> functions.c:6496:14: note: referencing argument 2 of type ‘char[4097]’
> In file included from ./../include/alias.h:10,
> from functions.c:46:
> ./../include/ircaux.h:49:9: note: in a call to function ‘normalize_filename’
> 49 | int normalize_filename (const char *, Filename);
> | ^~~~~~~~~~~~~~~~~~
> cc1: some warnings being treated as errors
> make[2]: *** [Makefile:34: functions.o] Error 1

The full build log is available from:
http://qa-logs.debian.net/2024/03/13/epic5_2.1.6-1_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.