dlopen failed: empty/missing DT_HASH in "libx.so" (built with --hash-style=gnu?)
http://stackoverflow.com/questions/28638809/android-ndk-unsatisfiedlinkerror-dlopen-failed-empty-missing-dt-hash
The library you are trying to load was most likely built with Wl,hash-style=gnu. This was not supported on Android until recently (afaik this isn't even in L). You need to build your libraries with -Wl,-hash-style=sysv.
How did you build cpplibrary.so? If you didn't do anything to manually switch to the gnu hash style, it could be a bug in the NDK.
readelf.exe -d libxxxx.so
Dynamic section at offset 0xed14 contains 27 entries:
Tag Type Name/Value
0x00000003 (PLTGOT) 0xfee0
0x00000002 (PLTRELSZ) 552 (bytes)
0x00000017 (JMPREL) 0x46fc
0x00000014 (PLTREL) REL
0x00000011 (REL) 0x39c4
0x00000012 (RELSZ) 3384 (bytes)
0x00000013 (RELENT) 8 (bytes)
0x6ffffffa (RELCOUNT) 420
0x00000006 (SYMTAB) 0x148
0x0000000b (SYMENT) 16 (bytes)
0x00000005 (STRTAB) 0x1918
0x0000000a (STRSZ) 5780 (bytes)
0x00000004 (HASH) 0x2fac
0x00000001 (NEEDED) Shared library: [liblog.so]
0x00000001 (NEEDED) Shared library: [libdl.so]
0x00000001 (NEEDED) Shared library: [libstdc++.so]
0x00000001 (NEEDED) Shared library: [libm.so]
0x00000001 (NEEDED) Shared library: [libc.so]
0x0000000e (SONAME) Library soname: [libbugrpt.so]
0x0000001a (FINI_ARRAY) 0xf590
0x0000001c (FINI_ARRAYSZ) 8 (bytes)
0x00000019 (INIT_ARRAY) 0xf598
0x0000001b (INIT_ARRAYSZ) 16 (bytes)
0x00000010 (SYMBOLIC) 0x0
0x0000001e (FLAGS) SYMBOLIC BIND_NOW
0x6ffffffb (FLAGS_1) Flags: NOW
0x00000000 (NULL) 0x0
Dynamic section at offset 0xed14 contains 27 entries:
Tag Type Name/Value
0x00000003 (PLTGOT) 0xfee0
0x00000002 (PLTRELSZ) 552 (bytes)
0x00000017 (JMPREL) 0x46fc
0x00000014 (PLTREL) REL
0x00000011 (REL) 0x39c4
0x00000012 (RELSZ) 3384 (bytes)
0x00000013 (RELENT) 8 (bytes)
0x6ffffffa (RELCOUNT) 420
0x00000006 (SYMTAB) 0x148
0x0000000b (SYMENT) 16 (bytes)
0x00000005 (STRTAB) 0x1918
0x0000000a (STRSZ) 5780 (bytes)
0x00000004 (HASH) 0x2fac
0x00000001 (NEEDED) Shared library: [liblog.so]
0x00000001 (NEEDED) Shared library: [libdl.so]
0x00000001 (NEEDED) Shared library: [libstdc++.so]
0x00000001 (NEEDED) Shared library: [libm.so]
0x00000001 (NEEDED) Shared library: [libc.so]
0x0000000e (SONAME) Library soname: [libbugrpt.so]
0x0000001a (FINI_ARRAY) 0xf590
0x0000001c (FINI_ARRAYSZ) 8 (bytes)
0x00000019 (INIT_ARRAY) 0xf598
0x0000001b (INIT_ARRAYSZ) 16 (bytes)
0x00000010 (SYMBOLIC) 0x0
0x0000001e (FLAGS) SYMBOLIC BIND_NOW
0x6ffffffb (FLAGS_1) Flags: NOW
0x00000000 (NULL) 0x0
改动前后的节并没有什么变化。然并卵啊!
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