[Pkg-alsa-devel] Bug#1096299: alsa-tools: ftbfs with GCC-15

[Matthias Klose]

Package: src:alsa-tools
Version: 1.2.11-1.1
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/alsa-tools_1.2.11-1.1_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

[...]
                 from /usr/include/gtk-2.0/gtk/gtk.h:126:
/usr/include/gtk-2.0/gtk/gtktooltips.h:73:3: warning: ‘GTimeVal’ is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations]
   73 |   GTimeVal last_popdown;
      |   ^~~~~~~~
In file included from /usr/include/glib-2.0/glib/galloca.h:34,
                 from /usr/include/glib-2.0/glib.h:32,
                 from /usr/include/glib-2.0/gobject/gbinding.h:30:
/usr/include/glib-2.0/glib/gtypes.h:580:8: note: declared here
  580 | struct _GTimeVal
      |        ^~~~~~~~~
In file included from profiles.c:32:
new_process.c: In function ‘new_process’:
new_process.c:67:18: error: assignment to ‘void (*)(void)’ from incompatible pointer type ‘__sighandler_t’ {aka ‘void (*)(int)’} [-Wincompatible-pointer-types]
   67 |         int_stat = signal(SIGINT, SIG_IGN);
      |                  ^
In file included from envy24control.h:4:
/usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
new_process.c:68:19: error: assignment to ‘void (*)(void)’ from incompatible pointer type ‘__sighandler_t’ {aka ‘void (*)(int)’} [-Wincompatible-pointer-types]
   68 |         quit_stat = signal(SIGQUIT, SIG_IGN);
      |                   ^
/usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
new_process.c:69:19: error: assignment to ‘void (*)(void)’ from incompatible pointer type ‘__sighandler_t’ {aka ‘void (*)(int)’} [-Wincompatible-pointer-types]
   69 |         usr2_stat = signal(SIGUSR2, SIG_IGN);
      |                   ^
/usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
new_process.c:81:24: error: passing argument 2 of ‘signal’ from incompatible pointer type [-Wincompatible-pointer-types]
   81 |         signal(SIGINT, int_stat);
      |                        ^~~~~~~~
      |                        |
      |                        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)
      |                                          ~~~~~~~~~~~~~~~^~~~~~~~~
/usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
new_process.c:82:25: error: passing argument 2 of ‘signal’ from incompatible pointer type [-Wincompatible-pointer-types]
   82 |         signal(SIGQUIT, quit_stat);
      |                         ^~~~~~~~~
      |                         |
      |                         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)
      |                                          ~~~~~~~~~~~~~~~^~~~~~~~~
/usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
new_process.c:83:25: error: passing argument 2 of ‘signal’ from incompatible pointer type [-Wincompatible-pointer-types]
   83 |         signal(SIGUSR2, usr2_stat);
      |                         ^~~~~~~~~
      |                         |
      |                         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)
      |                                          ~~~~~~~~~~~~~~~^~~~~~~~~
/usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
make[2]: *** [Makefile:477: profiles.o] Error 1
make[2]: Leaving directory '/build/reproducible-path/alsa-tools-1.2.11/envy24control'
make[1]: *** [Makefile:540: all-recursive] Error 1
make[1]: Leaving directory '/build/reproducible-path/alsa-tools-1.2.11/envy24control'
make: *** [debian/rules:72: build-stamp] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2