Bug#1097452: netpbm-free: ftbfs with GCC-15

[Matthias Klose]

Package: src:netpbm-free
Version: 2:11.09.02-2
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/netpbm-free_11.09.02-2_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

[...]

== xv-roundtrip.test ==
xv-roundtrip.test: SUCCESS

== xwd-roundtrip.test ==
xwdtopnm: writing PGM file
xwdtopnm: writing PBM file
xwdtopnm: writing PBM file
xwdtopnm: writing PBM file
xwd-roundtrip.test: SUCCESS

== ybm-roundtrip.test ==
ybm-roundtrip.test: SUCCESS

== fiasco-roundtrip.test ==
fiasco-roundtrip.test: SUCCESS

== jpeg-roundtrip.test ==
jpegtopnm: WRITING PPM FILE
jpegtopnm: WRITING PPM FILE
jpegtopnm: WRITING PPM FILE
jpeg-roundtrip.test: SUCCESS

== lps-roundtrip.test ==
pamdepth: promoting from black and white to grayscale
pstopnm: Writing pgmraw format
lps-roundtrip.test: SUCCESS

== tiffcmyk-roundtrip.test ==
TIFF Directory at offset 0x1a3d8 (107480)
  Image Width: 227 Image Length: 149
  Bits/Sample: 8
  Compression Scheme: LZW
  Photometric Interpretation: separated
  FillOrder: msb-to-lsb
  Orientation: row 0 top, col 0 lhs
  Samples/Pixel: 4
  Rows/Strip: 9
  Planar Configuration: single image plane
  DocumentName: testimg.ppm
  ImageDescription: PNM -> CMYK tiff
  Dot Range: 0-255
tifftopnm: 227x149x32 raster matrix, oriented 1
tifftopnm: 8 bits/sample, 4 samples/pixel
tifftopnm: color separation
tifftopnm: writing PPM file
tifftopnm: writing PPM file
tifftopnm: writing PPM file
tifftopnm: writing PPM file
tifftopnm: writing PPM file
tiffcmyk-roundtrip.test: SUCCESS

== yuv-roundtrip.test ==
yuv-roundtrip.test: SUCCESS

Test summary:
==================
SUCCESS 221
FAILURE 1
NOT TESTABLE 3
TOTAL TESTABLE 222
==================
All tests done.
Sun, 16 Feb 2025 02:44:39 +0000
make[2]: *** [GNUmakefile:564: check-tree] Error 1
make[2]: Leaving directory '/build/reproducible-path/netpbm-free-11.09.02'
make[1]: *** [debian/rules:75: override_dh_auto_test] Error 2
make[1]: Leaving directory '/build/reproducible-path/netpbm-free-11.09.02'
make: *** [debian/rules:19: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2