Bug#1097938: startpar: ftbfs with GCC-15

Mon Feb 17 17:55:16 GMT 2025

Package: src:startpar
Version: 0.66-1
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/startpar_0.66-1_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

[...]

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
SHELL=/bin/sh
USER=user42

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

Command: dpkg-buildpackage --sanitize-env -us -uc -b
dpkg-buildpackage: info: source package startpar
dpkg-buildpackage: info: source version 0.66-1
dpkg-buildpackage: info: source distribution unstable
dpkg-buildpackage: info: source changed by Mark Hindley <leepen at debian.org>
 dpkg-source --before-build .
dpkg-buildpackage: info: host architecture amd64
 debian/rules clean
dh clean
   dh_auto_clean
	make -j8 distclean
make[1]: Entering directory '/build/reproducible-path/startpar-0.66'
rm -f startpar makeboot startpar.o makeboot.o proc.o compiletest.o
rm -f startpar-0.66.tar.xz startpar-0.66.tar.xz.sig
make[1]: Leaving directory '/build/reproducible-path/startpar-0.66'
   dh_clean
 debian/rules binary
dh binary
   dh_update_autotools_config
   dh_autoreconf
   dh_auto_configure
   dh_auto_build
	make -j8 "INSTALL=install --strip-program=true"
make[1]: Entering directory '/build/reproducible-path/startpar-0.66'
cc -Wdate-time -D_FORTIFY_SOURCE=2 -Wdate-time -D_FORTIFY_SOURCE=2 -Wdate-time -D_FORTIFY_SOURCE=2   -D_GNU_SOURCE  -pipe -O2 -Wall -W -Wformat -Werror=format-security  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/startpar-0.66=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/startpar-0.66=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -DVERSION=\"0.66\"  -c startpar.c
cc -Wdate-time -D_FORTIFY_SOURCE=2 -Wdate-time -D_FORTIFY_SOURCE=2 -Wdate-time -D_FORTIFY_SOURCE=2   -D_GNU_SOURCE  -pipe -O2 -Wall -W -Wformat -Werror=format-security  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/startpar-0.66=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/startpar-0.66=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -DVERSION=\"0.66\"  -c makeboot.c
cc -Wdate-time -D_FORTIFY_SOURCE=2 -Wdate-time -D_FORTIFY_SOURCE=2 -Wdate-time -D_FORTIFY_SOURCE=2   -D_GNU_SOURCE  -pipe -O2 -Wall -W -Wformat -Werror=format-security  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/startpar-0.66=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/startpar-0.66=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -DVERSION=\"0.66\"  -c proc.c
g++ -g -O2 -ffile-prefix-map=/build/reproducible-path/startpar-0.66=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -Wdate-time -D_FORTIFY_SOURCE=2 -Wdate-time -D_FORTIFY_SOURCE=2  -c -o compiletest.o compiletest.cc
startpar.c:95:24: error: cannot use keyword ‘false’ as enumeration constant
   95 | typedef enum _boolean {false, true} boolean;
      |                        ^~~~~
startpar.c:95:24: note: ‘false’ is a keyword with ‘-std=c23’ onwards
startpar.c: In function ‘writebuf’:
startpar.c:310:9: warning: ignoring return value of ‘write’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  310 |         write(WRITE_TO_FD, temp_name, status);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
startpar.c:328:14: warning: ignoring return value of ‘write’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  328 |              write(WRITE_TO_FD, "\n", 2);
      |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~
startpar.c: In function ‘flushbuf’:
startpar.c:752:11: warning: ignoring return value of ‘write’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  752 |           write(WRITE_TO_FD, temp_name, status);
      |           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
startpar.c:768:13: warning: ignoring return value of ‘write’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  768 |             write(WRITE_TO_FD, "\n", 2);
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~
make[1]: *** [Makefile:64: startpar.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: Leaving directory '/build/reproducible-path/startpar-0.66'
dh_auto_build: error: make -j8 "INSTALL=install --strip-program=true" returned exit code 2
make: *** [debian/rules:12: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2