Protobuf does not build with large file support by default. I filed an upstream feature request here: https://github.com/protocolbuffers/protobuf/issues/12034 AFAICT large file support does not break the API boundary. ``` 19:59:20.235 * QA Notice: The following files were not built with LFS support: 19:59:20.249 * Please see https://issuetracker.google.com/201531268 for details. 19:59:20.263 * lseek,stat,__open_2 /usr/lib/libprotobuf.so.32.0.9 19:59:20.267 * lseek /usr/lib/libprotobuf-lite.so.32.0.9 19:59:20.271 * open,__open_2,fopen,fseeko,ftello /usr/lib/libprotoc.so.32.0.9 19:59:20.284 * Full build files: lseek,stat,open /build/arm-generic/tmp/portage/dev-libs/protobuf-21.9/work/build/src/.libs/libprotobuf.so.32.0.9 open,fseeko,ftello,fopen /build/arm-generic/tmp/portage/dev-libs/protobuf-21.9/work/build/src/.libs/libprotoc.so.32.0.9 lseek /build/arm-generic/tmp/portage/dev-libs/protobuf-21.9/work/build/src/google/protobuf/io/.libs/zero_copy_stream_impl.o open,fseeko,ftello,fopen /build/arm-generic/tmp/portage/dev-libs/protobuf-21.9/work/build/src/google/protobuf/compiler/.libs/command_line_interface.o stat,open /build/arm-generic/tmp/portage/dev-libs/protobuf-21.9/work/build/src/google/protobuf/compiler/.libs/importer.o open /build/arm-generic/tmp/portage/dev-libs/protobuf-21.9/work/build/src/google/protobuf/compiler/objectivec/.libs/objectivec_helpers.o fseeko,ftello,fopen /build/arm-generic/tmp/portage/dev-libs/protobuf-21.9/work/build/src/google/protobuf/compiler/objectivec/.libs/objectivec_generator.o lseek,stat,__open_2 /build/arm-generic/tmp/portage/dev-libs/protobuf-21.9/work/protobuf-21.9-.arm/src/.libs/libprotobuf.so.32.0.9 lseek /build/arm-generic/tmp/portage/dev-libs/protobuf-21.9/work/protobuf-21.9-.arm/src/.libs/libprotobuf-lite.so.32.0.9 open,__open_2,fopen,fseeko,ftello /build/arm-generic/tmp/portage/dev-libs/protobuf-21.9/work/protobuf-21.9-.arm/src/.libs/libprotoc.so.32.0.9 open,__open_2,fopen,fseeko,ftello /build/arm-generic/tmp/portage/dev-libs/protobuf-21.9/work/protobuf-21.9-.arm/src/.libs/libprotoc.so.32.0.9T lseek /build/arm-generic/tmp/portage/dev-libs/protobuf-21.9/work/protobuf-21.9-.arm/src/google/protobuf/io/.libs/zero_copy_stream_impl.o open,__open_2,fopen,fseeko,ftello /build/arm-generic/tmp/portage/dev-libs/protobuf-21.9/work/protobuf-21.9-.arm/src/google/protobuf/compiler/.libs/command_line_interface.o stat,__open_2 /build/arm-generic/tmp/portage/dev-libs/protobuf-21.9/work/protobuf-21.9-.arm/src/google/protobuf/compiler/.libs/importer.o __open_2 /build/arm-generic/tmp/portage/dev-libs/protobuf-21.9/work/protobuf-21.9-.arm/src/google/protobuf/compiler/objectivec/.libs/objectivec_helpers.o fopen,fseeko,ftello /build/arm-generic/tmp/portage/dev-libs/protobuf-21.9/work/protobuf-21.9-.arm/src/google/protobuf/compiler/objectivec/.libs/objectivec_generator.o ``` Reproducible: Always