Compilation of fuzzer fails with `custom-build.sh`

[lemzwerg]

[04fa941]

Calling custom-build.sh to build the 'fuzzer' target fails on my up-to-date openSUSE Leap 15.6 box – contrary to the 'driver' target, which succeeds. I've tested with both clang 14 and 19.

The linking failure starts as follows; I've attached the complete log.

FAILED: bin/legacy
: && /usr/bin/ccache \
  clang++ -std=c++11 \
          -fsanitize=fuzzer-no-link \
          -fsanitize=address \
          -fsanitize-address-use-after-scope \
          -fsanitize=undefined \
          -g -O0 -g \
          -fsanitize=address \
          -fsanitize=undefined \
          -rdynamic \
          -fsanitize=fuzzer \
          -nostdlib++ \
          src/fuzzers/CMakeFiles/fuzzer-legacy.dir/__/legacy/ftfuzzer.cc.o -o bin/legacy \
          .../freetype2-testing/fuzzing/../external/libarchive/.libs/libarchive.a \
          .../freetype2-testing/fuzzing/../external/freetype2/objs/.libs/libfreetype.a \
          .../freetype2-testing/fuzzing/../external/bzip2/libbz2.a \
          .../freetype2-testing/fuzzing/../external/brotli/build/libbrotlidec-static.a \
          .../freetype2-testing/fuzzing/../external/brotli/build/libbrotlicommon-static.a \
          .../freetype2-testing/fuzzing/../external/libpng/usr/lib-asan/libpng.a \
          .../freetype2-testing/fuzzing/../external/zlib/usr/lib-asan/libz.a \
          .../freetype2-testing/fuzzing/../external/llvm-project/build/lib/libc++.a \
          .../freetype2-testing/fuzzing/../external/llvm-project/build/lib/libc++abi.a \
&& :
/usr/bin/ld:
  /usr/lib64/clang/19/lib/linux/libclang_rt.fuzzer-x86_64.a(FuzzerIO.cpp.o):
    in function `fuzzer::FileToVector(std::__cxx11::basic_string<char,
                                      std::char_traits<char>,
                                      std::allocator<char> > const&,
                                      unsigned long,
                                      bool)':
  /home/abuild/rpmbuild/BUILD/llvm-19.1.7.src/projects/compiler-rt/lib/fuzzer/FuzzerIO.cpp:42:
  (.text._ZN6fuzzer12FileToVectorERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEmb+0x47):
    undefined reference to
      `std::basic_ifstream<char, std::char_traits<char> >::basic_ifstream(
        std::__cxx11::basic_string<char,
        std::char_traits<char>,
        std::allocator<char> > const&,
        std::_Ios_Openmode)'

@bungeman, please advise.

custom-build.log.gz