#1096465 cowpatty: ftbfs with GCC-15

#1096465#5
Date:
2025-02-17 17:08:07 UTC
From:
To:
[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/cowpatty_4.8-3_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

[...]
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
cowpatty.c:1132:25: error: passing argument 2 of ‘signal’ from incompatible pointer type [-Wincompatible-pointer-types]
 1132 |         signal(SIGQUIT, cleanup);
      |                         ^~~~~~~
      |                         |
      |                         void (*)(void)
/usr/include/signal.h:88:57: note: expected ‘__sighandler_t’ {aka ‘void (*)(int)’} but argument is of type ‘void (*)(void)’
   88 | extern __sighandler_t signal (int __sig, __sighandler_t __handler)
      |                                          ~~~~~~~~~~~~~~~^~~~~~~~~
cowpatty.c:94:6: note: ‘cleanup’ declared here
   94 | void cleanup()
      |      ^~~~~~~
/usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
genpmk.c: In function ‘main’:
genpmk.c:100:24: error: passing argument 2 of ‘signal’ from incompatible pointer type [-Wincompatible-pointer-types]
  100 |         signal(SIGINT, cleanup);
      |                        ^~~~~~~
      |                        |
      |                        void (*)(void)
In file included from genpmk.c:16:
/usr/include/signal.h:88:57: note: expected ‘__sighandler_t’ {aka ‘void (*)(int)’} but argument is of type ‘void (*)(void)’
   88 | extern __sighandler_t signal (int __sig, __sighandler_t __handler)
      |                                          ~~~~~~~~~~~~~~~^~~~~~~~~
genpmk.c:56:6: note: ‘cleanup’ declared here
   56 | void cleanup()
      |      ^~~~~~~
/usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
genpmk.c:101:25: error: passing argument 2 of ‘signal’ from incompatible pointer type [-Wincompatible-pointer-types]
  101 |         signal(SIGTERM, cleanup);
      |                         ^~~~~~~
      |                         |
      |                         void (*)(void)
/usr/include/signal.h:88:57: note: expected ‘__sighandler_t’ {aka ‘void (*)(int)’} but argument is of type ‘void (*)(void)’
   88 | extern __sighandler_t signal (int __sig, __sighandler_t __handler)
      |                                          ~~~~~~~~~~~~~~~^~~~~~~~~
genpmk.c:56:6: note: ‘cleanup’ declared here
   56 | void cleanup()
      |      ^~~~~~~
/usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
genpmk.c:102:25: error: passing argument 2 of ‘signal’ from incompatible pointer type [-Wincompatible-pointer-types]
  102 |         signal(SIGQUIT, cleanup);
      |                         ^~~~~~~
      |                         |
      |                         void (*)(void)
/usr/include/signal.h:88:57: note: expected ‘__sighandler_t’ {aka ‘void (*)(int)’} but argument is of type ‘void (*)(void)’
   88 | extern __sighandler_t signal (int __sig, __sighandler_t __handler)
      |                                          ~~~~~~~~~~~~~~~^~~~~~~~~
genpmk.c:56:6: note: ‘cleanup’ declared here
   56 | void cleanup()
      |      ^~~~~~~
/usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
make[1]: *** [<builtin>: cowpatty.o] Error 1
make[1]: *** Waiting for unfinished jobs....
genpmk.c:82:26: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable]
   82 |         int fret = 0, c, ret;
      |                          ^~~
make[1]: *** [<builtin>: genpmk.o] Error 1
make[1]: Leaving directory '/build/reproducible-path/cowpatty-4.8'
dh_auto_build: error: make -j8 "INSTALL=install --strip-program=true" returned exit code 2
make: *** [debian/rules:6: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2