[Pkg-opencl-devel] Bug#1097515: opencl-clang-18: ftbfs with GCC-15

[Matthias Klose]

Package: src:opencl-clang-18
Version: 18.1.1-1
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/opencl-clang-18_18.1.1-1_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

[...]
   29 |   SmallString() = default;
      |   ^~~~~~~~~~~
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h:1215:31: error: ‘class llvm::SmallVector<char, 256>’ has no member named ‘begin’
 1215 |     this->destroy_range(this->begin(), this->end());
      |                         ~~~~~~^~~~~
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h:1215:46: error: ‘class llvm::SmallVector<char, 256>’ has no member named ‘end’
 1215 |     this->destroy_range(this->begin(), this->end());
      |                                        ~~~~~~^~~
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h: In instantiation of ‘llvm::SmallVector<T, N>::~SmallVector() [with T = const char*; unsigned int N = 16]’:
/usr/lib/llvm-18/include/llvm/Option/ArgList.h:412:40:   required from here
  412 |   InputArgList() : NumInputArgStrings(0) {}
      |                                        ^
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h:1215:31: error: ‘class llvm::SmallVector<const char*, 16>’ has no member named ‘begin’
 1215 |     this->destroy_range(this->begin(), this->end());
      |                         ~~~~~~^~~~~
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h:1215:46: error: ‘class llvm::SmallVector<const char*, 16>’ has no member named ‘end’
 1215 |     this->destroy_range(this->begin(), this->end());
      |                                        ~~~~~~^~~
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h: In instantiation of ‘llvm::SmallVector<T, N>::SmallVector(llvm::SmallVector<T, N>&&) [with T = const char*; unsigned int N = 16]’:
/usr/lib/llvm-18/include/llvm/Option/ArgList.h:417:34:   required from here
  417 |       : ArgList(std::move(RHS)), ArgStrings(std::move(RHS.ArgStrings)),
      |                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h:1260:14: error: ‘class llvm::SmallVector<const char*, 16>’ has no member named ‘empty’
 1260 |     if (!RHS.empty())
      |          ~~~~^~~~~
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h: In instantiation of ‘llvm::SmallVector<T, N>& llvm::SmallVector<T, N>::operator=(llvm::SmallVector<T, N>&&) [with T = const char*; unsigned int N = 16]’:
/usr/lib/llvm-18/include/llvm/Option/ArgList.h:426:42:   required from here
  426 |     ArgStrings = std::move(RHS.ArgStrings);
      |                                          ^
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h:1278:13: error: ‘class llvm::SmallVector<const char*, 16>’ has no member named ‘empty’
 1278 |     if (RHS.empty()) {
      |         ~~~~^~~~~
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h:1279:33: error: ‘class llvm::SmallVector<const char*, 16>’ has no member named ‘begin’
 1279 |       this->destroy_range(this->begin(), this->end());
      |                           ~~~~~~^~~~~
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h:1279:48: error: ‘class llvm::SmallVector<const char*, 16>’ has no member named ‘end’
 1279 |       this->destroy_range(this->begin(), this->end());
      |                                          ~~~~~~^~~
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h:1280:13: error: ‘class llvm::SmallVector<const char*, 16>’ has no member named ‘Size’
 1280 |       this->Size = 0;
      |       ~~~~~~^~~~
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h: In instantiation of ‘llvm::SmallVector<T, N>::~SmallVector() [with T = char; unsigned int N = 0]’:
/usr/lib/llvm-18/include/llvm/Support/raw_ostream.h:728:71:   required from here
  728 |   buffer_ostream(raw_ostream &OS) : raw_svector_ostream(Buffer), OS(OS) {}
      |                                                                       ^
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h:1215:31: error: ‘class llvm::SmallVector<char, 0>’ has no member named ‘begin’
 1215 |     this->destroy_range(this->begin(), this->end());
      |                         ~~~~~~^~~~~
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h:1215:46: error: ‘class llvm::SmallVector<char, 0>’ has no member named ‘end’
 1215 |     this->destroy_range(this->begin(), this->end());
      |                                        ~~~~~~^~~
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h: In instantiation of ‘llvm::SmallVector<T, N>::~SmallVector() [with T = llvm::StringLiteral; unsigned int N = 3]’:
/usr/lib/llvm-18/include/llvm/Option/OptTable.h:330:7:   required from here
  330 | class GenericOptTable : public OptTable {
      |       ^~~~~~~~~~~~~~~
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h:1215:31: error: ‘class llvm::SmallVector<llvm::StringLiteral>’ has no member named ‘begin’
 1215 |     this->destroy_range(this->begin(), this->end());
      |                         ~~~~~~^~~~~
/usr/lib/llvm-18/include/llvm/ADT/SmallVector.h:1215:46: error: ‘class llvm::SmallVector<llvm::StringLiteral>’ has no member named ‘end’
 1215 |     this->destroy_range(this->begin(), this->end());
      |                                        ~~~~~~^~~
make[3]: *** [CMakeFiles/opencl-clang.dir/build.make:146: CMakeFiles/opencl-clang.dir/options.cpp.o] Error 1
make[3]: Leaving directory '/build/reproducible-path/opencl-clang-18-18.1.1/build'
make[2]: *** [CMakeFiles/Makefile2:305: CMakeFiles/opencl-clang.dir/all] Error 2
make[2]: Leaving directory '/build/reproducible-path/opencl-clang-18-18.1.1/build'
make[1]: *** [Makefile:139: all] Error 2
make[1]: Leaving directory '/build/reproducible-path/opencl-clang-18-18.1.1/build'
dh_auto_build: error: cd build && make -j8 "INSTALL=install --strip-program=true" VERBOSE=1 returned exit code 2
make: *** [debian/rules:11: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2