m4api: FTBFS: m4api.c:413:10: error: implicit declaration of function ‘m4SetBinary’ [-Werror=implicit-function-declaration]

Imported from Debian bug http://bugs.debian.org/1066290:

Source: m4api
Version: 0.3~0.9646fd-2.1
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):
> /usr/bin/cc -Dm4api_EXPORTS -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 -fPIC -MD -MT CMakeFiles/m4api.dir/m4api.c.o -MF CMakeFiles/m4api.dir/m4api.c.o.d -o CMakeFiles/m4api.dir/m4api.c.o -c "/<<PKGBUILDDIR>>/m4api.c"
> /<<PKGBUILDDIR>>/m4api.c: In function ‘m4SetFloat’:
> /<<PKGBUILDDIR>>/m4api.c:413:10: error: implicit declaration of function ‘m4SetBinary’ [-Werror=implicit-function-declaration]
> 413 | return m4SetBinary(dev, field, binary);
> | ^~~~~~~~~~~
> /<<PKGBUILDDIR>>/m4api.c: In function ‘m4SetFloat’:
> /<<PKGBUILDDIR>>/m4api.c:413:10: error: implicit declaration of function ‘m4SetBinary’ [-Werror=implicit-function-declaration]
> 413 | return m4SetBinary(dev, field, binary);
> | ^~~~~~~~~~~
> cc1: some warnings being treated as errors
> make[3]: *** [CMakeFiles/m4api-static.dir/build.make:79: CMakeFiles/m4api-static.dir/m4api.c.o] Error 1

The full build log is available from:
http://qa-logs.debian.net/2024/03/13/m4api_0.3~0.9646fd-2.1_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.