Bug#1096580: emoslib: ftbfs with GCC-15

[Matthias Klose]

Package: src:emoslib
Version: 2:4.5.9-11
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/emoslib_4.5.9-11_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

[...]
      |                                                                       |
      |                                                                       long int
      |                                                                     %d
 2053 |                          current->fname, thisFile);
      |                                          ~~~~~~~~                      
      |                                          |
      |                                          int
make[3]: *** [libemos-sp-shared/CMakeFiles/emos_sp_shared.dir/build.make:6912: libemos-sp-shared/CMakeFiles/emos_sp_shared.dir/__/pbio/fort2c.c.o] Error 1
make[3]: *** Waiting for unfinished jobs....
/build/reproducible-path/emoslib-4.5.9/pbio/PBGroutines.c: In function ‘pbggeth012_’:
/build/reproducible-path/emoslib-4.5.9/pbio/PBGroutines.c:2380:47: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘int’ [-Wformat=]
 2380 |     printf("pbggeth012: getting GRIB number %ld in file %s\n",
      |                                             ~~^
      |                                               |
      |                                               long int
      |                                             %d
 2381 |     (index+1), pfile);
      |     ~~~~~~~~~                                  
      |           |
      |           int
/build/reproducible-path/emoslib-4.5.9/pbio/PBGroutines.c:2392:64: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘int’ [-Wformat=]
 2392 |       if( DEBUG1 ) printf("pbggeth012: length of GRIB number %ld = %ld\n",
      |                                                              ~~^
      |                                                                |
      |                                                                long int
      |                                                              %d
 2393 |                           (index+1), length);
      |                           ~~~~~~~~~                             
      |                                 |
      |                                 int
/build/reproducible-path/emoslib-4.5.9/pbio/PBGroutines.c:2392:70: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 3 has type ‘int’ [-Wformat=]
 2392 |       if( DEBUG1 ) printf("pbggeth012: length of GRIB number %ld = %ld\n",
      |                                                                    ~~^
      |                                                                      |
      |                                                                      long int
      |                                                                    %d
 2393 |                           (index+1), length);
      |                                      ~~~~~~                           
      |                                      |
      |                                      int
/build/reproducible-path/emoslib-4.5.9/pbio/PBGroutines.c:2399:64: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘int’ [-Wformat=]
 2399 |       if( DEBUG1 ) printf("pbggeth012: offset of GRIB number %ld = %lld\n",
      |                                                              ~~^
      |                                                                |
      |                                                                long int
      |                                                              %d
 2400 |                           (index+1), offset);
      |                           ~~~~~~~~~                             
      |                                 |
      |                                 int
/build/reproducible-path/emoslib-4.5.9/pbio/PBGroutines.c:2399:71: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 3 has type ‘off_t’ {aka ‘long int’} [-Wformat=]
 2399 |       if( DEBUG1 ) printf("pbggeth012: offset of GRIB number %ld = %lld\n",
      |                                                                    ~~~^
      |                                                                       |
      |                                                                       long long int
      |                                                                    %ld
 2400 |                           (index+1), offset);
      |                                      ~~~~~~                            
      |                                      |
      |                                      off_t {aka long int}
make[3]: Leaving directory '/build/reproducible-path/emoslib-4.5.9/obj-x86_64-linux-gnu'
make[2]: *** [CMakeFiles/Makefile2:4578: libemos-sp/CMakeFiles/emos_sp.dir/all] Error 2
make[3]: Leaving directory '/build/reproducible-path/emoslib-4.5.9/obj-x86_64-linux-gnu'
make[2]: *** [CMakeFiles/Makefile2:4642: libemos-sp-shared/CMakeFiles/emos_sp_shared.dir/all] Error 2
make[2]: Leaving directory '/build/reproducible-path/emoslib-4.5.9/obj-x86_64-linux-gnu'
make[1]: *** [Makefile:169: all] Error 2
make[1]: Leaving directory '/build/reproducible-path/emoslib-4.5.9/obj-x86_64-linux-gnu'
dh_auto_build: error: cd obj-x86_64-linux-gnu && make -j8 "INSTALL=install --strip-program=true" returned exit code 2
make: *** [debian/rules:7: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2