Bug#957942: wmcube: ftbfs with GCC-10

[Matthias Klose]

Package: src:wmcube
Version: 1.0.2-1
Severity: normal
Tags: sid bullseye
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-10

Please keep this issue open in the bug tracker for the package it
was filed for.  If a fix in another package is required, please
file a bug for the other package (or clone), and add a block in this
package. Please keep the issue open until the package can be built in
a follow-up test rebuild.

The package fails to build in a test rebuild on at least amd64 with
gcc-10/g++-10, but succeeds to build with gcc-9/g++-9. The
severity of this report will be raised before the bullseye release,
so nothing has to be done for the buster release.

The full build log can be found at:
http://people.debian.org/~doko/logs/gcc10-20200225/wmcube_1.0.2-1_unstable_gcc10.log
The last lines of the build log are at the end of this report.

To build with GCC 10, either set CC=gcc-10 CXX=g++-10 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t=experimental install g++ 

Common build failures are new warnings resulting in build failures with
-Werror turned on, or new/dropped symbols in Debian symbols files.
For other C/C++ related build failures see the porting guide at
http://gcc.gnu.org/gcc-10/porting_to.html

[...]
----------------

Sufficient free space for build

User Environment
----------------

APT_CONFIG=/var/lib/sbuild/apt.conf
HOME=/sbuild-nonexistent
LANG=C.UTF-8
LC_ALL=C.UTF-8
LOGNAME=user42
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
SCHROOT_ALIAS_NAME=unstable
SCHROOT_CHROOT_NAME=sid-amd64-sbuild
SCHROOT_COMMAND=env
SCHROOT_GID=1001
SCHROOT_GROUP=user42
SCHROOT_SESSION_ID=sid-amd64-sbuild-a1d63b32-4790-4db9-b95a-e48095c5333e
SCHROOT_UID=1001
SCHROOT_USER=user42
SHELL=/bin/sh
USER=user42

dpkg-buildpackage
-----------------

Command: dpkg-buildpackage -us -uc -b -rfakeroot
dpkg-buildpackage: info: source package wmcube
dpkg-buildpackage: info: source version 1.0.2-1
dpkg-buildpackage: info: source distribution unstable
dpkg-buildpackage: info: source changed by Doug Torrance <dtorrance at piedmont.edu>
 dpkg-source --before-build .
dpkg-buildpackage: info: host architecture amd64
 fakeroot debian/rules clean
dh clean --sourcedirectory=wmcube
   dh_auto_clean -O--sourcedirectory=wmcube
	cd wmcube && make -j1 clean
make[1]: Entering directory '/<<PKGBUILDDIR>>/wmcube'
for i in wmcube.o ../wmgeneral/wmgeneral.o ../wmgeneral/misc.o ../wmgeneral/list.o ; do \
	rm -f $i ; \
done
rm -f wmcube
rm -f *~
make[1]: Leaving directory '/<<PKGBUILDDIR>>/wmcube'
   dh_clean -O--sourcedirectory=wmcube
 debian/rules build
dh build --sourcedirectory=wmcube
   dh_update_autotools_config -O--sourcedirectory=wmcube
   dh_auto_configure -O--sourcedirectory=wmcube
   debian/rules override_dh_auto_build
make[1]: Entering directory '/<<PKGBUILDDIR>>'
dh_auto_build --sourcedirectory=wmcube -- \
	CFLAGS="-g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security"
	cd wmcube && make -j1 "CFLAGS=-g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security"
make[2]: Entering directory '/<<PKGBUILDDIR>>/wmcube'
gcc -DLINUX -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -I/usr/X11R6/share/include -c wmcube.c -o wmcube.o
gcc -DLINUX -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -I/usr/X11R6/share/include -c ../wmgeneral/wmgeneral.c -o ../wmgeneral/wmgeneral.o
gcc -DLINUX -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -I/usr/X11R6/share/include -c ../wmgeneral/misc.c -o ../wmgeneral/misc.o
gcc -DLINUX -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -I/usr/X11R6/share/include -c ../wmgeneral/list.c -o ../wmgeneral/list.o
gcc -Wl,-z,relro -Wl,-z,now -o wmcube wmcube.o ../wmgeneral/wmgeneral.o ../wmgeneral/misc.o ../wmgeneral/list.o -lXext -L/usr/X11R6/lib -lXpm -lXext -lX11 -lm 
/usr/bin/ld: ../wmgeneral/wmgeneral.o:./wmcube/../wmgeneral/wmgeneral.h:39: multiple definition of `display'; wmcube.o:./wmcube/../wmgeneral/wmgeneral.h:39: first defined here
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:31: wmcube] Error 1
make[2]: Leaving directory '/<<PKGBUILDDIR>>/wmcube'
dh_auto_build: error: cd wmcube && make -j1 "CFLAGS=-g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security" returned exit code 2
make[1]: *** [debian/rules:14: override_dh_auto_build] Error 25
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:7: build] Error 2
dpkg-buildpackage: error: debian/rules build subprocess returned exit status 2