LDC runtime is broken for android

[MrcSnm]

Tested

I'm doing that on windows btw.
My etc.conf:

"aarch64-.*-linux-android":
{
    switches = [
        "-defaultlib=phobos2-ldc,druntime-ldc",
        "-link-defaultlib-shared=false",
        "-gcc=C:/Users/Hipreme/AppData/Local/Android/Sdk/ndk/25.1.8937393/toolchains/llvm/prebuilt/windows-x86_64/bin/aarch64-linux-android21-clang.cmd",
        "-linker=C:/Users/Hipreme/AppData/Local/Android/Sdk/ndk/25.1.8937393/toolchains/llvm/prebuilt/windows-x86_64/bin/ld.exe"
    ];
    lib-dirs = [
        "%%ldcbinarypath%%/../../ldc2-1.22.0-android-aarch64/lib",
    ];
    rpath = "";
};

• 1.22.0
• 1.26.0
• 1.27.0
• 1.28.0
• 1.28.1

dlopen failed: cannot locate symbol "__start___minfo" referenced by "/data/app/com.hipremeengine.app-5v-UadUCsHwXgGTgHWJRiA==/lib/arm64/libhipreme_engine.so"...

• 1.29
• 1.30

2022-11-16 20:13:03.648 2987-2987 DEBUG pid-2987 A #1 pc 00000000000bb348 /data/app/com.hipremeengine.app-4SMbRX-MLQzfat6W-RP7Pw==/lib/arm64/libhipreme_engine.so (_D4core8internal2gc4bits6GCBits10copyRangeZMFNbNimmPxmZv+196)

This trivial code gives runtime error on rt_init

import core.stdc.stdarg;

version (Android):

enum android_LogPriority
{
    ANDROID_LOG_UNKNOWN,
    ANDROID_LOG_DEFAULT,
    ANDROID_LOG_VERBOSE,
    ANDROID_LOG_DEBUG,
    ANDROID_LOG_INFO,
    ANDROID_LOG_WARN,
    ANDROID_LOG_ERROR,
    ANDROID_LOG_FATAL,
    ANDROID_LOG_SILENT
}
extern (C) @system nothrow @nogc
{
    int __android_log_write(int prio, const(char)* tag, const(char)* text);
    int __android_log_print(int prio, const(char)* tag, const(char)* fmt, ...);
    int __android_log_vprint(int prio, const(char)* tag, const(char)* fmt, va_list ap);
    void __android_log_assert(const(char)* cond, const(char)* tag, const(char)* fmt, ...);
}


export extern(C)
void Java_com_hipremeengine_app_HipremeEngine_HipremeInit(void* env, void* clazz)
{
    import core.runtime;
	__android_log_write(android_LogPriority.ANDROID_LOG_WARN, "MyAPP", "Hello before");
    rt_init();
	__android_log_write(android_LogPriority.ANDROID_LOG_FATAL, "MyAPP", "Hello after");
}

[kinke]

The lld linker (coming with NDKs >= 22 IIRC) isn't supported on Android, our TLS emulation requires the bfd linker. So any NDK > 21 doesn't work, see #3918.

[MrcSnm]

"aarch64-.*-linux-android":
{
    switches = [
        "-defaultlib=phobos2-ldc,druntime-ldc",
        "-link-defaultlib-shared=false",
        "-gcc=C:/Users/Hipreme/AppData/Local/Android/Sdk/ndk/21.0.6113669/toolchains/llvm/prebuilt/windows-x86_64/bin/aarch64-linux-android21-clang.cmd",
        "-linker=C:/Users/Hipreme/AppData/Local/Android/Sdk/ndk/21.0.6113669/toolchains/llvm/prebuilt/windows-x86_64/bin/aarch64-linux-android-ld.bfd.exe"
    ];
    lib-dirs = [
        "%%ldcbinarypath%%/../../ldc2-1.29.0-android-aarch64/lib",
    ];
    rpath = "%%ldcbinarypath%%/../../ldc2-1.29.0-android-aarch64/lib";
};

Is working now! Thanks

[s-ludwig]

Looks like this has become a blocker for Android apps. Any published app must now be targeted at API level 33, but NDK r21e only supports up to 30.

[kinke]

Thx for the info. Let's close this and move the 'discussion' to #3918, which contains more detailed info.