CMake Android configuration on OSX fails

[hsdk123]

Hi, I'm using the ndk toolchain here: https://developer.android.com/ndk/guides/cmake. I get the following cmake configuration errors when trying to cmake config for Android on osx:

WARNING: Target "OpenAL" requests linking to directory "/System/Library/Frameworks/AudioToolbox.framework".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "OpenAL" requests linking to directory "/System/Library/Frameworks/ApplicationServices.framework".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "OpenAL" requests linking to directory "/System/Library/Frameworks/AudioUnit.framework".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "OpenAL" requests linking to directory "/System/Library/Frameworks/CoreAudio.framework".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "OpenAL" requests linking to directory "/System/Library/Frameworks/AudioToolbox.framework".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "OpenAL" requests linking to directory "/System/Library/Frameworks/ApplicationServices.framework".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "OpenAL" requests linking to directory "/System/Library/Frameworks/AudioUnit.framework".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "OpenAL" requests linking to directory "/System/Library/Frameworks/CoreAudio.framework".  Targets may link only to libraries.  CMake is dropping the item

It seems that OpenAL is trying to pull in the osx backends instead of doing something particular for Android.

[kcat]

What you provided are only warnings, which usually don't stop the build. Can you provide the full output? You can set the ALSOFT_BACKEND_COREAUDIO cmake option to FALSE to disable the CoreAudio backend which links to those OSX frameworks. Though it's odd that FIND_LIBRARY() succeeds in finding the frameworks if it can't use them.

[hsdk123]

It seems to be trying to link in CoreAudio:

/Users/hkim809/Desktop/SoulEngineProject/Light.vn-multi/extlibs/openal-soft/alc/backends/coreaudio.cpp:37:10: fatal error:
      'AudioUnit/AudioUnit.h' file not found
#include <AudioUnit/AudioUnit.h>
         ^~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
make[2]: *** [openal-soft/CMakeFiles/OpenAL.dir/alc/backends/coreaudio.cpp.o] Error 1

(this is the error on build)

[hsdk123]

I've also tried setting the CoreAudio option off as you've mentioned, but in this case I still see other errors:

C02Z38WNLVDQ:build-android hkim809$ make
[  3%] Built target CorradeUtilityObjects
[  5%] Built target CorradeUtility
[  6%] Built target CorradeInterconnect
[  7%] Built target CorradePluginManagerObjects
[  7%] Built target CorradePluginManager
[  8%] Built target CorradeTestSuite
[  9%] Built target native-tools
[  9%] Built target build_version
[ 11%] Built target common
[ 24%] Built target OpenAL
[ 25%] Built target ex-common
[ 25%] Linking C executable ../../bin/alrecord
/Users/hkim809/Desktop/DevTools/android-ndk-r20b/toolchains/llvm/prebuilt/darwin-x86_64/lib/gcc/aarch64-linux-android/4.9.x/../../../../aarch64-linux-android/bin/ld: warning: libOpenSLES.so, needed by ../../bin/libopenal.so, not found (try using -rpath or -rpath-link)
/Users/hkim809/Desktop/DevTools/android-ndk-r20b/toolchains/llvm/prebuilt/darwin-x86_64/lib/gcc/aarch64-linux-android/4.9.x/../../../../aarch64-linux-android/bin/ld: warning: liblog.so, needed by ../../bin/libopenal.so, not found (try using -rpath or -rpath-link)
../../bin/libopenal.so: undefined reference to `slCreateEngine'
../../bin/libopenal.so: undefined reference to `__android_log_print'
../../bin/libopenal.so: undefined reference to `SL_IID_PLAY'
../../bin/libopenal.so: undefined reference to `SL_IID_ANDROIDCONFIGURATION'
../../bin/libopenal.so: undefined reference to `SL_IID_RECORD'
../../bin/libopenal.so: undefined reference to `SL_IID_ENGINE'
../../bin/libopenal.so: undefined reference to `SL_IID_ANDROIDSIMPLEBUFFERQUEUE'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [../bin/alrecord] Error 1
make[1]: *** [openal-soft/CMakeFiles/alrecord.dir/all] Error 2
make: *** [all] Error 2

[kcat]

... libOpenSLES.so, needed by ../../bin/libopenal.so, not found ...
... liblog.so, needed by ../../bin/libopenal.so, not found ...

That's odd. It finds them during cmake and successfully links libopenal.so with them, but then fails to find them when linking libopenal.so to a program. Not sure why that would happen, since I'm not doing anything abnormal with CMake to find and use those libraries.

[fbirot]

Compilation for android worked for me correctly on OSX.

In order to compile it, I've specified the toolchain directly in the command: cmake . -DCMAKE_TOOLCHAIN_FILE=/Users/fbirot/Library/Android/sdk/ndk/21.1.6352462/build/cmake/android.toolchain.cmake

I've also set ALSOFT_UTILS, ALSOFT_EXAMPLES and ALSOFT_INSTALL options to OFF. I have then generated a java wrapper using SWIG and included the generated wrapper file like this target_sources(OpenAL PRIVATE "${OpenAL_SOURCE_DIR}/android/jni/OpenALSoft_wrap.c")

Android studio can also directly work with cmake, which can be more handy than using cmake from the command line.

[iscle]

... libOpenSLES.so, needed by ../../bin/libopenal.so, not found ...
... liblog.so, needed by ../../bin/libopenal.so, not found ...

That's odd. It finds them during cmake and successfully links libopenal.so with them, but then fails to find them when linking libopenal.so to a program. Not sure why that would happen, since I'm not doing anything abnormal with CMake to find and use those libraries.

This error also happened to me when building with: cmake .. -DANDROID_PLATFORM=21 -DANDROID_ABI=arm84_v8a -DCMAKE_TOOLCHAIN_FILE=$NDK/build/cmake/android.toolchain.cmake on a clean Ubuntu 18.04 LTS install.

[iscle]

Did you ever find a fix for this issue? It's really weird, as the .so files are present!