unrecognized property "cflags" for cc_prebuilt_library_shared module

user_1944896 0
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I am writing Android.bp file for one of the prebuild library. In Android.mk It was possible to add CFlags for prebuilt library; however same is not working in case of blueprint i.e. Android.bp. A snippet of what I am doing is below:

cc_prebuilt_library_shared {
    name: "samplelib",
    vendor_available:true,
    cflags: [
       "-Wall",
        "-Wextra",
        "-Werror",
    ],
    tags: [
        "optional",
        "eng",
        "debug",
    ],

    target: {
        android_x86:{
                 srcs: ["bin/x86/samplelib.so"],
                 compile_multilib: "32",
                 relative_install_path: "lib",
        },
        android_x86_64:{
                 srcs: ["bin/x86_64/samplelib.so"],
                 compile_multilib: "64",
                 relative_install_path: "lib64",
        },
   },
}

However I am getting following error:

/Android.bp:5:11: unrecognized property "cflags"

So if I understand correctly, cflags can't be used with cc_prebuilt_library_shared module; if that's the case how can we enable CFlags for this module then ?

android-build android-source shared-libraries android c++
2 Answers

This might not sounding relevant; but the fix was setting LOCAL_STRIP_MODULE to None and removing cflags from the Android.bp file. So working snippet looks like this:

cc_prebuilt_library_shared {
    name: "samplelib",
    vendor_available:true,
    tags: [
        "optional",
        "eng",
        "debug",
    ],

    target: {
        android_x86:{
                 srcs: ["bin/x86/samplelib.so"],
                 compile_multilib: "32",
                 relative_install_path: "lib",
        },
        android_x86_64:{
                 srcs: ["bin/x86_64/samplelib.so"],
                 compile_multilib: "64",
                 relative_install_path: "lib64",
        },
   },
    strip: {
            none:true,
    },
}

Notice "strip" attribute which is set to none and cflags is also removed.

Note: "strip" attribute is blueprint version of LOCAL_STRIP_MODULE of makefile.

user_19448960

Having cflags for prebuilt binaries does not make much sense. They are provided to the compiler when building C/C++ files. Since your libraries are already built you should not need them.

user_74015460
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