Questions regarding linker options of gradle and cmake

[seal2002]

Hello,

My project use gradle and cmake (the default option of Android Studio) to compile. I'm newbie on Cmake & gradle.

I want to pass --fix-cortex-a53-843419 to the linker step. So I have some question regarding how to pass the linker options to the config, and how to know the configs apply or don't

1. For build.gradle, some arguments has description in here, so if I want to pass the fix cortex argument, seem no option for me to do it?
2. Passing the option directly to CMakeLists.txt with CMAKE_SHARED_LINKER_FLAGS, It will effected all the architecture. And it will be error with armeabi-v7a, need to rewrite the CMakeLists.txt to avoid the issue? and the relate question in 4
3. That is good with the compile_commands.json. However, it is very few of options. If need to check on the arguments has pass compile and link step, do we have another file?
4. Regarding question 3,  I search in folder a\.cxx\cmake\[Type]\[abi]CmakeFiles\3.10.2\*.*. Found the file with name CMakeOutput.log and some interesting line arg [--fix-cortex-a53-843419] ==> ignore . So do you know actually with 2, the option already pass and accept?

Note that android-ndk-r21d is used. Host Machine is Ubuntu 18.04 - 64bit. Gradle 5.5.1 & AGP 3.5.3

Many thanks for your time to read those question.

Seal

[Dan Albert]

Not needed on Android: https://github.com/llvm/llvm-project/blob/f3731d34faa7432462c877714af235e9787c9b30/clang/lib/Driver/ToolChains/Clang.cpp#L1667-L1671

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[Dan Albert]

Oh, sorry, very similar errata numbers. Same answer though: https://github.com/llvm/llvm-project/blob/f3731d34faa7432462c877714af235e9787c9b30/clang/lib/Driver/ToolChains/Gnu.cpp#L452-L458

[seal2002]

Thanks Dan for clear answer and the link to llvm project. That would be great to check for other options too