Bug#1091027: syslinux: FTBFS: debug.c:91:5: error: implicit declaration of function ‘printf’ [-Wimplicit-function-declaration]

Source: syslinux
Version: 3:6.04~git20190206.bf6db5b4+dfsg1-3
Severity: serious
Justification: FTBFS
Tags: trixie sid ftbfs
User: [email protected]
Usertags: ftbfs-20241222 ftbfs-trixie

Hi,

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


Relevant part (hopefully):
> gcc -MT syslinux/debug.o -MD -MF syslinux/.debug.o.d -Os -march=i386 -falign-functions=0 -falign-jumps=0 -falign-labels=0 -ffast-math -fomit-frame-pointer -std=gnu99 -m32 -mpreferred-stack-boundary=2 -fno-stack-protector -fwrapv -freg-struct-return -fPIC -fno-exceptions -fno-asynchronous-unwind-tables -fno-strict-aliasing -falign-functions=0 -falign-jumps=0 -falign-labels=0 -falign-loops=0 -g -D__COM32__ -D__FIRMWARE_BIOS__ -nostdinc -iwithprefix include -I. -I/<<PKGBUILDDIR>>/com32/lib/sys -I/<<PKGBUILDDIR>>/com32/lib/../include -I/<<PKGBUILDDIR>>/com32/include/sys -I/<<PKGBUILDDIR>>/core/include -I/<<PKGBUILDDIR>>/com32/lib/ -I/<<PKGBUILDDIR>>/com32/lib/sys/module -I/<<PKGBUILDDIR>>/bios/com32/lib//../.. -fcommon -W -Wall -Wstrict-prototypes  -Wpointer-arith -Wwrite-strings -Wstrict-pr
 ototypes -Winline -DDYNAMIC_CRC_TABLE -mregparm=3 -DREGPARM=3 -c -o syslinux/debug.o /<<PKGBUILDDIR>>/com32/lib/syslinux/debug.c
> /<<PKGBUILDDIR>>/com32/lib/syslinux/debug.c: In function ‘syslinux_debug’:
> /<<PKGBUILDDIR>>/com32/lib/syslinux/debug.c:91:5: error: implicit declaration of function ‘printf’ [-Wimplicit-function-declaration]
>    91 |     printf("Dynamic debug unavailable\n");
>       |     ^~~~~~
> /<<PKGBUILDDIR>>/com32/lib/syslinux/debug.c:4:1: note: include ‘<stdio.h>’ or provide a declaration of ‘printf’
>     3 | #include <stdbool.h>
>   +++ |+#include <stdio.h>
>     4 | 
> /<<PKGBUILDDIR>>/com32/lib/syslinux/debug.c:91:5: warning: incompatible implicit declaration of built-in function ‘printf’ [-Wbuiltin-declaration-mismatch]
>    91 |     printf("Dynamic debug unavailable\n");
>       |     ^~~~~~
> /<<PKGBUILDDIR>>/com32/lib/syslinux/debug.c:91:5: note: include ‘<stdio.h>’ or provide a declaration of ‘printf’
> make[6]: *** [/<<PKGBUILDDIR>>/mk/lib.mk:215: syslinux/debug.o] Error 1


The full build log is available from:
http://qa-logs.debian.net/2024/12/22/syslinux_6.04~git20190206.bf6db5b4+dfsg1-3_unstable.log

All bugs filed during this archive rebuild are listed at:
https://bugs.debian.org/cgi-bin/pkgreport.cgi?tag=ftbfs-20241222;[email protected]
or:
https://udd.debian.org/bugs/?release=na&merged=ign&fnewerval=7&flastmodval=7&fusertag=only&fusertagtag=ftbfs-20241222&[email protected]&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.