enable_android_secondary_abi=false does not make the android manifest multiarch=false?

[Jia Yih Ang]

Here is my args.gn

target_os = "android"
target_cpu = "arm64"
android_channel = "stable"
system_webview_package_name = "com.motorolasolutions.webview"
use_jacoco_coverage = true
is_debug = false
is_official_build = false
enable_nacl = false
is_chrome_branded = false
exclude_unwind_tables = true
use_official_google_api_keys = false
symbol_level = 0
blink_symbol_level = 0
v8_symbol_level = 0
chrome_pgo_phase = 0
clang_use_default_sample_profile = false
enable_android_secondary_abi = false

I purposely set the enable_android_secondary_abi to exclude 32 bits build from trichromelibrary and trichromewebview, but when i flash into the device. I realise that there is a flag trigger the packageManagerService to forceMatch the multiarch value in AndroidManifest.xml

n1:multiArch="true"

<application n1:extractNativeLibs="false" n1:hasCode="false" n1:icon="@drawable/icon_webview" n1:label="Trichrome Library" n1:multiArch="true">

     <static-library n1:name="org.chromium.trichromelibrary" n1:version="720406331"/>

</application>

Is there any parameter can be used to make the multiArch = false, since we excluded 32 bits from our build

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[Torne (Richard Coles)]

If the device supports both 32 and 64 bit apps then you can't exclude 32-bit support from WebView, as 32-bit apps will crash when trying to use it.

If the device doesn't support 32-bit apps, then setting `multiarch=true` should have no effect on the ability to install.

`enable_android_secondary_abi` is not intended to be used for production binaries; it's a hack for local development where you want to speed up the build by skipping building the 32-bit code because you don't need it for the specific thing you're currently testing.

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