iroh resp. rocksdb does not compile on android

[r10s]

trying to build https://github.com/deltachat/deltachat-core-rust/pull/3489 on android leads to different errors:

for "arm64-v8a" and "x86_64" (though printed as a "warning", compiling is aborted with an error):

  cargo:warning=rocksdb/env/io_posix.cc:1001:41: error: use of undeclared identifier 'POSIX_MADV_NORMAL'
  cargo:warning=      Madvise(mmapped_region_, length_, POSIX_MADV_NORMAL);
  cargo:warning=                                        ^
  cargo:warning=rocksdb/env/io_posix.cc:1004:41: error: use of undeclared identifier 'POSIX_MADV_RANDOM'
  cargo:warning=      Madvise(mmapped_region_, length_, POSIX_MADV_RANDOM);
  cargo:warning=                                        ^
  cargo:warning=rocksdb/env/io_posix.cc:1007:41: error: use of undeclared identifier 'POSIX_MADV_SEQUENTIAL'
  cargo:warning=      Madvise(mmapped_region_, length_, POSIX_MADV_SEQUENTIAL);
  cargo:warning=                                        ^
  cargo:warning=rocksdb/env/io_posix.cc:1010:41: error: use of undeclared identifier 'POSIX_MADV_WILLNEED'
  cargo:warning=      Madvise(mmapped_region_, length_, POSIX_MADV_WILLNEED);
  cargo:warning=                                        ^
  cargo:warning=rocksdb/env/io_posix.cc:1013:41: error: use of undeclared identifier 'POSIX_MADV_DONTNEED'
  cargo:warning=      Madvise(mmapped_region_, length_, POSIX_MADV_DONTNEED);
  cargo:warning=                                        ^
  cargo:warning=5 errors generated.
  exit status: 0
  exit status: 1

for "armv7-linux-androideabi (arm)" and "i686-linux-android (x86)"

  cargo:warning=In file included from rocksdb/cache/cache_key.cc:13:
  cargo:warning=In file included from rocksdb/util/hash.h:26:
  cargo:warning=rocksdb/util/fastrange.h:62:5: error: unknown type name '__uint128_t'
  cargo:warning=    __uint128_t wide = __uint128_t{range} * hash;
  cargo:warning=    ^
  cargo:warning=rocksdb/util/fastrange.h:62:24: error: use of undeclared identifier '__uint128_t'
  cargo:warning=    __uint128_t wide = __uint128_t{range} * hash;
  cargo:warning=                       ^
  cargo:warning=rocksdb/util/fastrange.h:62:35: error: expected ';' at end of declaration
  cargo:warning=    __uint128_t wide = __uint128_t{range} * hash;
  cargo:warning=                                  ^
  cargo:warning=                                  ;
  cargo:warning=3 errors generated.
  exit status: 1

~~not sure yet if x86-32bit builds on android.~~ EDIT: it does not, i added these targets above.

[dignifiedquire]

@r10s what is the NDK version you are building against?

[dignifiedquire]

I got it to build by setting the following things

TARGET_CC=/opt/android-ndk/toolchains/llvm/prebuilt/linux-x86_64/bin/x86_64-linux-android28-clang \
CC=/opt/android-ndk/toolchains/llvm/prebuilt/linux-x86_64/bin/x86_64-linux-android28-clang \
CXX=/opt/android-ndk/toolchains/llvm/prebuilt/linux-x86_64/bin/x86_64-linux-android28-clang++ \
cargo build --target x86_64-linux-android -p deltachat_ffi --features vendored

[dignifiedquire]

And for any ndk version > 21 needs a workaround like this: https://github.com/godot-rust/godot-rust/pull/920

[r10s]

@r10s what is the NDK version you are building against?

just having a look: i am using locally r22b, Dockerimage uses r23c.

[r10s]

And for any ndk version > 21 needs a workaround like this: https://github.com/godot-rust/godot-rust/pull/920

that seems to be already done at https://github.com/deltachat/deltachat-android/blob/master/scripts/ndk-make.sh#L95

[r10s]

I got it to build by setting the following things

TARGET_CC=/opt/android-ndk/toolchains/llvm/prebuilt/linux-x86_64/bin/x86_64-linux-android28-clang
CC=/opt/android-ndk/toolchains/llvm/prebuilt/linux-x86_64/bin/x86_64-linux-android28-clang
CXX=/opt/android-ndk/toolchains/llvm/prebuilt/linux-x86_64/bin/x86_64-linux-android28-clang++
cargo build --target x86_64-linux-android -p deltachat_ffi --features vendored

k, stepping away from ./scripts/ndk-make.sh for a moment.

i tried the following:

• cd jni/deltachat-core-rust
• executing the command from above (with paths adapted to local mac environment)

compiling seem to run through for that target, so, some tiny steps, but linking throws the error:

  = note: ld: unknown option: --version-script=/var/folders/24/mxfz55k547g94mql66v050ww0000gn/T/rustcaUsENY/list
          clang: error: linker command failed with exit code 1 (use -v to see invocation)

wondering, where the option --version-script is set.

[dignifiedquire]

@r10s unclear to me where that is coming from either for me, looks like an option that is not available on macos/clangd. Can you build master with that command cleanly?

[dignifiedquire]

@r10s thanks to @fabricedesre I got this script which he uses to build his projects including iroh for android phones https://gist.github.com/dignifiedquire/6d9dc7c6efff2c68e430aa700d1a2e62

[r10s]

@r10s unclear to me where that is coming from either for me, looks like an option that is not available on macos/clangd. Can you build master with that command cleanly?

good aspect to test - and indeed building with command from above on master throws the same error for me on macos.

but i double checked ./ndk-make.sh on current master and recent iroh-share pr - the latter still fails with errors as initially shown.

[fabricedesre]

fyi, we updated the build config for iroh to work on the ndk r25b. Relevant changes are setting AR and the linker:

https://github.com/capyloon/iroh/blob/e5a8a19435ab1ac2c833a4d432148bb86a958a1d/iroh-one/utils.sh#L85 https://github.com/capyloon/iroh/blob/e5a8a19435ab1ac2c833a4d432148bb86a958a1d/iroh-one/utils.sh#L178

[r10s]

some issues might also be related to the new toolchain, master was just updated to rust 1.65, so, let's see if master compiles and android now.

[link2xt]

Closing this as #3489 is closed.