Bug#1096766: gr-framework: ftbfs with GCC-15

[Matthias Klose]

Package: src:gr-framework
Version: 0.73.12+dfsg-2
Severity: important
Tags: sid forky
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-15

[This bug is NOT targeted to the upcoming trixie release]

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-15/g++-15, but succeeds to build with gcc-14/g++-14. The
severity of this report will be raised before the forky release.

The full build log can be found at:
http://qa-logs.debian.net/2025/02/16/amd64exp/gr-framework_0.73.12+dfsg-2_unstable_gccexp.log.gz
The last lines of the build log are at the end of this report.

To build with GCC 15, either set CC=gcc-15 CXX=g++-15 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t=experimental install g++ 

GCC 15 now defaults to the C23/C++23 standards, exposing many FTBFS.
Other 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-15/porting_to.html

[...]
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/usr/bin/cc -DGRDIR=\"/usr\" -DGRLIB=\"/usr/lib/x86_64-linux-gnu\" -DHAVE_ZLIB -I/build/reproducible-path/gr-framework-0.73.12+dfsg/lib/gr3 -I/build/reproducible-path/gr-framework-0.73.12+dfsg/lib/gr -I/build/reproducible-path/gr-framework-0.73.12+dfsg/lib/gks -isystem /usr/include/freetype2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/gr-framework-0.73.12+dfsg=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -std=c90 -fPIC -pthread -MD -MT CMakeFiles/gr3_static.dir/lib/gr3/gr3_glx.c.o -MF CMakeFiles/gr3_static.dir/lib/gr3/gr3_glx.c.o.d -o CMakeFiles/gr3_static.dir/lib/gr3/gr3_glx.c.o -c /build/reproducible-path/gr-framework-0.73.12+dfsg/lib/gr3/gr3_glx.c
[ 49%] Building C object CMakeFiles/gr3_shared.dir/lib/gr3/gr3_glx.c.o
/usr/bin/cc -DGRDIR=\"/usr\" -DGRLIB=\"/usr/lib/x86_64-linux-gnu\" -DHAVE_ZLIB -Dgr3_shared_EXPORTS -I/build/reproducible-path/gr-framework-0.73.12+dfsg/lib/gr3 -I/build/reproducible-path/gr-framework-0.73.12+dfsg/lib/gr -I/build/reproducible-path/gr-framework-0.73.12+dfsg/lib/gks -isystem /usr/include/freetype2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/gr-framework-0.73.12+dfsg=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -std=c90 -fPIC -pthread -MD -MT CMakeFiles/gr3_shared.dir/lib/gr3/gr3_glx.c.o -MF CMakeFiles/gr3_shared.dir/lib/gr3/gr3_glx.c.o.d -o CMakeFiles/gr3_shared.dir/lib/gr3/gr3_glx.c.o -c /build/reproducible-path/gr-framework-0.73.12+dfsg/lib/gr3/gr3_glx.c
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make[2]: Leaving directory '/build/reproducible-path/gr-framework-0.73.12+dfsg/obj-x86_64-linux-gnu'
make[1]: *** [Makefile:139: all] Error 2
make[1]: Leaving directory '/build/reproducible-path/gr-framework-0.73.12+dfsg/obj-x86_64-linux-gnu'
dh_auto_build: error: cd obj-x86_64-linux-gnu && make -j8 "INSTALL=install --strip-program=true" VERBOSE=1 returned exit code 2
make: *** [debian/rules:14: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2