android: Use android.ndkPath property to set path to NDK

Quoting from

    commit 128de1949ff120ac925dbb06e398fa992fb295ba
    Date:   Tue Apr 19 15:18:49 2022 +0200

        android: Use property instead of ANDROID_NDK_HOME env var

which ported from an obsolete (no longer supported by
current Gradle versions) way of setting the NDK path to a
deprecated but still supported one as an intermediate step
to allow upgrading Gradle:

> Note however, that with this approach of using the `ndk.dir`
> property instead of the suggested `android.ndkVersion`
> (with the latter having the stricter requirement that
> the `ndk` dir would have to be a subdir of the SDK dir),
> doing the actual upgrade to a newer Gradle (plugin) version
> in follow-up commit
> Change-Id Ia982d72d877e229c3006c6d528b830d16c88481f
> "android: Update Android Gradle Plugin to 7.1.3"
> revealed that the use of the `ndk.dir` property
> is deprecated in newer Gradle (plugin) versions as well,
> resulting in this warning.
>
> > > Task :stripStrippedUIDebugDebugSymbols
> > [CXX5106] NDK was located by using ndk.dir property. This method is
> > deprecated and will be removed in a future release. Please delete
> > ndk.dir from local.properties and set android.ndkVersion to
> > [20.0.5594570] in all native modules in the project.
> > https://developer.android.com/r/studio-ui/ndk-dir
>
> It might make sense to address that in a follow-up step,
> but for now, it's an improvement and keeps it working
> after the upgrade without potentially causing any incompatibility
> problems with existing autogen configurations,
> while support for the `ANDROID_NDK_HOME` env var that was
> used so far seems to have been dropped, [...].

The release notes for Android Gradle Plugin version 4.1.0
mention yet another way of setting an explicit NDK path
instead of just a version and that one is still supported
and not deprecated [1]:

> # Set the NDK path
> You can set the path to your local NDK installation using the
> android.ndkPath property in your module's build.gradle file.
>
> android {
>    ndkPath "your-custom-ndk-path"
> }
>
> If you use this property together with the android.ndkVersion property,
> then this path must contain an NDK version that matches
> android.ndkVersion.

Therefore, switch to setting the NDK path using the `android.ndkPath`
property in liboSettings.gradle instead of the deprecated `ndk.dir`
in local.properties.

[1] https://developer.android.com/studio/releases/gradle-plugin?buildsystem=ndk-build#ndk-path

Change-Id: I34690ca8e15ff4742bab9a716a58b9ad85fa86e7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/133197
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/android/Bootstrap/Makefile.shared b/android/Bootstrap/Makefile.shared
index 74121e6f03b4..f9825b583c05 100644
--- a/android/Bootstrap/Makefile.shared
+++ b/android/Bootstrap/Makefile.shared
@@ -23,8 +23,7 @@ OBJLOCAL=$(BUILDDIR)/android/obj/local/$(ANDROID_APP_ABI)
 #
 
 local.properties: $(BUILDDIR)/config_host.mk
-	echo ndk.dir=$(ANDROID_NDK_DIR) >local.properties
-	echo sdk.dir=$(ANDROID_SDK_DIR) >>local.properties
+	echo sdk.dir=$(ANDROID_SDK_DIR) >local.properties
 
 #
 # Build / link the single .so for this app
@@ -106,6 +105,9 @@ liboSettings.gradle: $(BUILDDIR)/config_build.mk $(BUILDDIR)/config_host.mk
 		&& echo "    liboVersionMinor    = '$(LIBO_VERSION_MINOR)'" \
 		&& echo "    liboGitFullCommit   = '$(shell cd $(SRCDIR) && git log -1 --format=%H)'" \
 		&& echo "}" \
+		&& echo "android {" \
+		&& echo "    ndkPath '$(ANDROID_NDK_DIR)'" \
+		&& echo "}" \
 		&& echo "android.defaultConfig {" \
 		&& echo "    applicationId '$(ANDROID_PACKAGE_NAME)'" \
 		&& echo "    archivesBaseName = 'LibreOfficeViewer'" \