Get ARM builds of the library.

[prabhav-mehra]

Hi, I am using ImageSharp.Heir which uses this library in the backend and supports windows and ios out of the box. Wanted to know where can I get the ARM builds of libheif (for .net if that's different) as mentioned in the issue hey-red/ImageSharp.Heif#3

[farindk]

I have added scripts to build Android libraries into the scripts folder of libde265 and libheif.
I have also uploaded pre-built libraries for all Android architectures to the release pages:
libde265-1.0.12 Android libs
libheif-1.16.2 Android libs

[prabhav-mehra]

@farindk The pre-built libs doesn't recognaise the libde256 decoders. Running the script gives me the following output

[ 69%] Linking CXX executable encode
cd C:/applications/libheif/scripts/build/arm64-v8a/tests && C:/Users/pra11840/AppData/Local/Android/Sdk/ndk/22.1.7171670/toolchains/llvm/prebuilt/windows-x86_64/bin/clang++.exe --target=aarch64-none-linux-android21 --gcc-toolchain=C:/Users/pra11840/AppData/Local/Android/Sdk/ndk/22.1.7171670/toolchains/llvm/prebuilt/windows-x86_64 --sysroot=C:/Users/pra11840/AppData/Local/Android/Sdk/ndk/22.1.7171670/toolchains/llvm/prebuilt/windows-x86_64/sysroot -g -DANDROID -fdata-sections -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security   -O2 -DNDEBUG  -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libgcc_real.a -Wl,--exclude-libs,libatomic.a -static-libstdc++ -Wl,--build-id=sha1 -Wl,--no-rosegment -Wl,--fatal-warnings -Wl,--no-undefined -Qunused-arguments -Wl,--gc-sections  "CMakeFiles/encode.dir/main.cc.o" "CMakeFiles/encode.dir/__/generated/test-config.cc.o" "CMakeFiles/encode.dir/test_utils.cc.o" "CMakeFiles/encode.dir/encode.cc.o"  -o encode  ../libheif/libheif.so -latomic -lm
ld: error: undefined symbol: __android_log_write
>>> referenced by catch.hpp:10374 (C:/applications/libheif/tests\catch.hpp:10374)
>>>               CMakeFiles/encode.dir/main.cc.o:(Catch::Detail::(anonymous namespace)::StreamBufImpl<Catch::Detail::(anonymous namespace)::OutputDebugWriter, 256ul>::sync())
>>> referenced by catch.hpp:10374 (C:/applications/libheif/tests\catch.hpp:10374)
>>>               CMakeFiles/encode.dir/main.cc.o:(Catch::Detail::(anonymous namespace)::StreamBufImpl<Catch::Detail::(anonymous namespace)::OutputDebugWriter, 256ul>::overflow(int))
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [tests/encode] Error 1
make[2]: Leaving directory `C:/applications/libheif/scripts/build/arm64-v8a'
make[1]: *** [tests/CMakeFiles/encode.dir/all] Error 2
make[1]: Leaving directory `C:/applications/libheif/scripts/build/arm64-v8a'
make: *** [all] Error 2
[ 59%] Built target heif
[ 61%] Linking CXX executable encode

commenting the line out builds everything successfully with no error but still libde256 is not being recognised.

I was able to get it working after adding the following lines. Should these be added in the script by default?

-DLIBDE265_INCLUDE_DIR=../libde265-1.0.12-android-libs/arm64-v8a/include \
-DLIBDE265_LIBRARY=../libde265-1.0.12-android-libs/arm64-v8a/lib/libde265.so \

Compiling 'libde265' as built-in backend
-- Found LIBDE265
-- Found LIBDE265: ... (found version "1.0.12")
libde265 (HEIC decoder): found (built-in)

[anonomousxxx]

Doesn't work for me even after adding those lines (versions 1.17.6 and 1.0.15)

> fatal error: 'libde265/de265-version.h' file not found
> #include <libde265/de265-version.h>