Bug#1066310: dx: FTBFS: _compparse.c:51:17: error: implicit declaration of function ‘_dxfcclex’ [-Werror=implicit-function-declaration]

[Lucas Nussbaum]

Source: dx
Version: 1:4.4.4-15.1
Severity: serious
Justification: FTBFS
Tags: trixie sid ftbfs
User: lucas at debian.org
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):
> /bin/bash ../../../libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. -I../../../include -I../../../include -I./../dpexec -I/<<PKGBUILDDIR>>/include -Dlinux  -Wdate-time -D_FORTIFY_SOURCE=2   -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -fsigned-char -fno-strict-aliasing -std=c++11 -D_GNU_SOURCE -I/usr/include/x86_64-linux-gnu/ImageMagick-6 -I/usr/include/ImageMagick-6 -fopenmp -DMAGICKCORE_HDRI_ENABLE=0 -DMAGICKCORE_QUANTUM_DEPTH=16  -c -o _compparse.lo _compparse.c
> libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I../../../include -I../../../include -I./../dpexec -I/<<PKGBUILDDIR>>/include -Dlinux -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -fsigned-char -fno-strict-aliasing -std=c++11 -D_GNU_SOURCE -I/usr/include/x86_64-linux-gnu/ImageMagick-6 -I/usr/include/ImageMagick-6 -fopenmp -DMAGICKCORE_HDRI_ENABLE=0 -DMAGICKCORE_QUANTUM_DEPTH=16 -c _compparse.c  -fPIC -DPIC -o .libs/_compparse.o
> cc1: warning: command-line option ‘-std=c++11’ is valid for C++/ObjC++ but not for C
> y.tab.c: In function ‘_dxfccparse’:
> _compparse.c:51:17: error: implicit declaration of function ‘_dxfcclex’ [-Werror=implicit-function-declaration]
>    51 | #define yylex   _dxfcclex
>       |                 ^~~~~~~~~
> y.tab.c:651:16: note: in expansion of macro ‘yylex’
> y.tab.c:1107:16: note: in expansion of macro ‘YYLEX’
> _compparse.c:52:17: error: implicit declaration of function ‘_dxfccerror’ [-Werror=implicit-function-declaration]
>    52 | #define yyerror _dxfccerror
>       |                 ^~~~~~~~~~~
> y.tab.c:1682:2: note: in expansion of macro ‘yyerror’
> ./_compparse.y: In function ‘_dxfccerror’:
> ./_compparse.y:432:47: error: implicit declaration of function ‘_dxfcclexerror’; did you mean ‘_dxfccerror’? [-Werror=implicit-function-declaration]
> cc1: some warnings being treated as errors
> make[6]: *** [Makefile:961: _compparse.lo] Error 1


The full build log is available from:
http://qa-logs.debian.net/2024/03/13/dx_4.4.4-15.1_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.