Build error: Bult Android binaries do not load #840
Description
Description
This problem happens both when building libmozcjni.so via the Docker build instructions and when using one of the github CI build artifacts. The generated libmozcjni.so contains a great deal of undefined function references but no links to any libraries which define those functions. The result is that attempting to load this library on Android results in an error when calling System.loadLibrary().
Commit-id
006084c (latest)
Build target
Choose one of them
1. Docker build for Linux and Android-lib
- macOS build
- Windows build
- Others (no guarantee)
CI build status
Whether the current CI build status is passing or failure.
https://github.com/google/mozc#build-status
Choose either of them
- passing
- failure
Environment
Docker image built from latest revision
Build commands
Following exactly https://github.com/google/mozc/blob/master/docs/build_mozc_in_docker.md.
Error logs
Here is the dlopen error generated from attempting to call loadLibrary on the latest CI artifact.
java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "_ZNSt6__ndk15ctypeIcE2idE" referenced by "/data/app/~~R5usQJuIgq1kTfPJpnv8FA==/org.mozc.android.inputmethod.japanese-W6Ui47b9v4YKwX352Z3TcA==/base.apk!/lib/arm64-v8a/libmozcjni.so"...
Additional context
Here is the output of objdump -T on the latest CI artifact for Android. (Only the relevant lines are included.)
0000000000000000 DF *UND* 0000000000000000 (LIBC) __cxa_finalize
0000000000000000 DF *UND* 0000000000000000 (LIBC) __cxa_atexit
0000000000000000 DF *UND* 0000000000000000 (LIBC) __register_atfork
0000000000000000 DF *UND* 0000000000000000 (LIBC) memcpy
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc7Logging13InitLogStreamERKNSt6__ndk112basic_stringIcNS1_11char_traitsIcEENS1_9allocatorIcEEEE
0000000000000000 D *UND* 0000000000000000 Base _ZNSt6__ndk112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEED1Ev
0000000000000000 D *UND* 0000000000000000 Base _ZN6google8protobuf11MessageLite14ParseFromArrayEPKvi
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc12LogFinalizerC1ENS_11LogSeverityE
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc7Logging19GetWorkingLogStreamEv
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc7Logging19GetLogMessageHeaderEv
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc7Logging27GetBeginColorEscapeSequenceENS_11LogSeverityE
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc7Logging18GetLogSeverityNameENS_11LogSeverityE
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc7Logging25GetEndColorEscapeSequenceEv
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc12LogFinalizeranERNS_16WorkingLogStreamE
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc12LogFinalizerD1Ev
0000000000000000 D *UND* 0000000000000000 Base _ZNK4mozc8commands7Command12ByteSizeLongEv
0000000000000000 D *UND* 0000000000000000 Base _ZNK6google8protobuf11MessageLite16SerializeToArrayEPvi
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc8commands7CommandD1Ev
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc10SystemUtil23GetUserProfileDirectoryEv
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc10SystemUtil23SetUserProfileDirectoryERKNSt6__ndk112basic_stringIcNS1_11char_traitsIcEENS1_9allocatorIcEEEE
0000000000000000 D *UND* 0000000000000000 Base _ZNSt6__ndk112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6__initEPKcm
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc8commands7CommandC2EPN6google8protobuf5ArenaE
0000000000000000 D *UND* 0000000000000000 Base _ZNSt6__ndk113basic_ostreamIcNS_11char_traitsIcEEElsEi
0000000000000000 D *UND* 0000000000000000 Base _ZNSt6__ndk113basic_ostreamIcNS_11char_traitsIcEEE6sentryC1ERS3_
0000000000000000 D *UND* 0000000000000000 Base _ZNSt6__ndk113basic_ostreamIcNS_11char_traitsIcEEE6sentryD1Ev
0000000000000000 D *UND* 0000000000000000 Base __cxa_begin_catch
0000000000000000 D *UND* 0000000000000000 Base _ZNSt6__ndk18ios_base33__set_badbit_and_consider_rethrowEv
0000000000000000 D *UND* 0000000000000000 Base __cxa_end_catch
0000000000000000 D *UND* 0000000000000000 Base _ZSt9terminatev
0000000000000000 D *UND* 0000000000000000 Base _ZNSt6__ndk112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6__initEmc
0000000000000000 D *UND* 0000000000000000 Base _ZNKSt6__ndk18ios_base6getlocEv
0000000000000000 D *UND* 0000000000000000 Base _ZNSt6__ndk16localeD1Ev
0000000000000000 D *UND* 0000000000000000 Base _ZNSt6__ndk15ctypeIcE2idE
0000000000000000 D *UND* 0000000000000000 Base _ZNKSt6__ndk16locale9use_facetERNS0_2idE
0000000000000000 D *UND* 0000000000000000 Base _ZNSt6__ndk18ios_base5clearEj
0000000000000000 DF *UND* 0000000000000000 (LIBC) strlen
0000000000000000 D *UND* 0000000000000000 Base _Znwm
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc13MinimalEngineC1Ev
0000000000000000 D *UND* 0000000000000000 Base _ZdlPv
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc11DataManager14CreateFromFileERKNSt6__ndk112basic_stringIcNS1_11char_traitsIcEENS1_9allocatorIcEEEE
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc6Engine18CreateMobileEngineENSt6__ndk110unique_ptrIKNS_20DataManagerInterfaceENS1_14default_deleteIS4_EEEE
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc14SessionHandlerC1ENSt6__ndk110unique_ptrINS_15EngineInterfaceENS1_14default_deleteIS3_EEEENS2_INS_22EngineBuilderInterfaceENS4_IS7_EEEE
0000000000000000 DF *UND* 0000000000000000 (LIBC) memset
0000000000000000 D *UND* 0000000000000000 Base _ZN4absl12lts_20230125lsERNSt6__ndk113basic_ostreamIcNS1_11char_traitsIcEEEERKNS0_6StatusE
0000000000000000 D *UND* 0000000000000000 Base _ZN4absl12lts_2023012517internal_statusor6Helper5CrashERKNS0_6StatusE
0000000000000000 D *UND* 0000000000000000 Base _ZN4absl12lts_202301256Status15UnrefNonInlinedEm
0000000000000000 D *UND* 0000000000000000 Base _ZTVN4mozc13EngineBuilderE
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc18SingletonFinalizer12AddFinalizerEPFvvE
0000000000000000 D *UND* 0000000000000000 Base _ZN4mozc7session20SessionUsageObserverC1Ev
0000000000000000 D *UND* 0000000000000000 Base _ZN4absl12lts_2023012516raw_log_internal6RawLogENS0_11LogSeverityEPKciS4_z
0000000000000000 D *UND* 0000000000000000 Base _ZN4absl12lts_2023012513base_internal12SpinLockWaitEPNSt6__ndk16atomicIjEEiPKNS1_22SpinLockWaitTransitionENS1_14SchedulingModeE
0000000000000000 D *UND* 0000000000000000 Base AbslInternalSpinLockWake_lts_20230125
0000000000000000 D *UND* 0000000000000000 Base _ZNSt6__ndk112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE9__grow_byEmmmmmm
0000000000000000 D *UND* 0000000000000000 Base __cxa_pure_virtual
0000000000000000 D *UND* 0000000000000000 Base _ZTVN10__cxxabiv117__class_type_infoE
0000000000000000 D *UND* 0000000000000000 Base __gxx_personality_v0
0000000000000000 DF *UND* 0000000000000000 (LIBC) pthread_rwlock_unlock
0000000000000000 DF *UND* 0000000000000000 (LIBC) fprintf
0000000000000000 DF *UND* 0000000000000000 (LIBC) pthread_rwlock_wrlock
0000000000000000 DF *UND* 0000000000000000 (LIBC) strncmp
0000000000000000 DF *UND* 0000000000000000 (LIBC) malloc
0000000000000000 DF *UND* 0000000000000000 (LIBC) __system_property_get
0000000000000000 DF *UND* 0000000000000000 (LIBC) free
0000000000000000 DF *UND* 0000000000000000 (LIBC) fflush
0000000000000000 DF *UND* 0000000000000000 (LIBC) getauxval
0000000000000000 DF *UND* 0000000000000000 (LIBC) pthread_rwlock_rdlock
0000000000000000 DF *UND* 0000000000000000 (LIBC) abort
0000000000000000 DF *UND* 0000000000000000 (LIBC) fwrite
0000000000000000 DO *UND* 0000000000000000 (LIBC) __sF
0000000000000000 DF *UND* 0000000000000000 (LIBC) dl_iterate_phdr
A good number of these appear to be libc++ functions. However, libmozcjni.so doesn't link to libc++ according to readelf -d.
Dynamic section at offset 0x17150 contains 26 entries:
Tag Type Name/Value
0x0000000000000001 (NEEDED) Shared library: [libc.so]
0x0000000000000001 (NEEDED) Shared library: [libm.so]
0x0000000000000001 (NEEDED) Shared library: [libdl.so]
0x000000000000001e (FLAGS) BIND_NOW
0x000000006ffffffb (FLAGS_1) Flags: NOW
0x0000000000000007 (RELA) 0x5368
0x0000000000000008 (RELASZ) 1248 (bytes)
0x0000000000000009 (RELAENT) 24 (bytes)
0x000000006ffffff9 (RELACOUNT) 32
0x0000000000000017 (JMPREL) 0x5848
0x0000000000000002 (PLTRELSZ) 4440 (bytes)
0x0000000000000003 (PLTGOT) 0x17338
0x0000000000000014 (PLTREL) RELA
0x0000000000000006 (SYMTAB) 0x2f0
0x000000000000000b (SYMENT) 24 (bytes)
0x0000000000000005 (STRTAB) 0x1b74
0x000000000000000a (STRSZ) 14324 (bytes)
0x000000006ffffef5 (GNU_HASH) 0x17d0
0x0000000000000019 (INIT_ARRAY) 0x17140
0x000000000000001b (INIT_ARRAYSZ) 16 (bytes)
0x000000000000001a (FINI_ARRAY) 0x17130
0x000000000000001c (FINI_ARRAYSZ) 16 (bytes)
0x000000006ffffff0 (VERSYM) 0x15f8
0x000000006ffffffe (VERNEED) 0x1790
0x000000006fffffff (VERNEEDNUM) 2
0x0000000000000000 (NULL) 0x0
I may be making a mistake and misunderstanding how elf/Android works, but something here seems wrong to me.