build: update NDK to r27

If we are dropping Android 4 support anyway,
can as well upgrade to the current LTS NDK
which requires API level 21 (Android 5.0).

.github/workflows/preview-apk.yml

@@ -33,7 +33,7 @@ jobs:
       - uses: nttld/setup-ndk@v1
         id: setup-ndk
         with:
-          ndk-version: r23c
+          ndk-version: r27
 
       - name: Compile core
         env:

Dockerfile

@@ -35,9 +35,9 @@ ENV PATH ${PATH}:${ANDROID_SDK_ROOT}/cmdline-tools/bin
 #
 # If you change the NDK version here, also change it in `flake.nix`.
 # NDK version r23c LTS aka 23.2.8568313
-RUN sdkmanager --sdk_root=${ANDROID_SDK_ROOT} 'ndk;23.2.8568313'
+RUN sdkmanager --sdk_root=${ANDROID_SDK_ROOT} 'ndk;27.0.11902837'
 
-ENV ANDROID_NDK_ROOT ${ANDROID_SDK_ROOT}/ndk/23.2.8568313
+ENV ANDROID_NDK_ROOT ${ANDROID_SDK_ROOT}/ndk/27.0.11902837
 ENV PATH ${PATH}:${ANDROID_NDK_ROOT}/toolchains/llvm/prebuilt/linux-x86_64/bin/
 
 RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain none

build.gradle

@@ -23,7 +23,7 @@ android {
     //   > Task :stripFatDebugDebugSymbols
     //   Unable to strip the following libraries, packaging them as they are: libanimation-decoder-gif.so, libnative-utils.so.
     // See <https://issuetracker.google.com/issues/237187538> for details.
-    ndkVersion "23.2.8568313"
+    ndkVersion "27.0.12077973"
     useLibrary 'org.apache.http.legacy'
 
     defaultConfig {

flake.nix

@@ -20,15 +20,15 @@
             ndk-bundle
             platform-tools
             platforms-android-34
-            ndk-23-2-8568313
+            ndk-27-0-11902837
           ]);
         rust-version = pkgs.lib.removeSuffix "\n"
           (builtins.readFile ./scripts/rust-toolchain);
       in {
         devShells.default = pkgs.mkShell {
           ANDROID_SDK_ROOT = "${android-sdk}/share/android-sdk";
           ANDROID_NDK_ROOT =
-            "${android-sdk}/share/android-sdk/ndk/23.2.8568313";
+            "${android-sdk}/share/android-sdk/ndk/27.0.11902837";
           buildInputs = [
             android-sdk
             pkgs.openjdk17

jni/dc_wrapper.c

@@ -7,57 +7,6 @@
 #include "deltachat-core-rust/deltachat-ffi/deltachat.h"
 
 
-#if __ANDROID_API__ == 16
-unsigned long getauxval(unsigned long type) {
-    return 0;
-}
-
-#include <sys/socket.h>
-#include <unistd.h>
-
-int sendmmsg(int sockfd, struct mmsghdr *msgvec, unsigned int vlen,
-             int flags)
-{
-    if (flags != 0) {
-        // Not supported by the fallback.
-        return -1;
-    }
-
-    if (vlen == 0) {
-        return 0;
-    }
-
-    ssize_t n = sendmsg(sockfd, &msgvec->msg_hdr, flags);
-    if (n == -1) {
-        return -1;
-    }
-
-    (*msgvec).msg_len = n;
-    return 1;
-}
-
-int recvmmsg(int sockfd, struct mmsghdr *msgvec, unsigned int vlen,
-             int flags, struct timespec *timeout)
-{
-    if (flags != 0) {
-        // Not supported by the fallback.
-        return -1;
-    }
-
-    if (vlen == 0) {
-        return 0;
-    }
-
-    int n = recvmsg(sockfd, &msgvec->msg_hdr, flags);
-    if (n == -1) {
-        return -1;
-    }
-    (*msgvec).msg_len = n;
-    return 1;
-}
-#endif
-
-
 static dc_msg_t* get_dc_msg(JNIEnv *env, jobject obj);
 
 

scripts/ndk-make.sh

@@ -68,9 +68,9 @@ fi
 unset RUSTFLAGS
 
 TOOLCHAIN="$ANDROID_NDK_ROOT/toolchains/llvm/prebuilt/$NDK_HOST_TAG"
-export CARGO_TARGET_ARMV7_LINUX_ANDROIDEABI_LINKER="$TOOLCHAIN/bin/armv7a-linux-androideabi16-clang"
+export CARGO_TARGET_ARMV7_LINUX_ANDROIDEABI_LINKER="$TOOLCHAIN/bin/armv7a-linux-androideabi21-clang"
 export CARGO_TARGET_AARCH64_LINUX_ANDROID_LINKER="$TOOLCHAIN/bin/aarch64-linux-android21-clang"
-export CARGO_TARGET_I686_LINUX_ANDROID_LINKER="$TOOLCHAIN/bin/i686-linux-android16-clang"
+export CARGO_TARGET_I686_LINUX_ANDROID_LINKER="$TOOLCHAIN/bin/i686-linux-android21-clang"
 export CARGO_TARGET_X86_64_LINUX_ANDROID_LINKER="$TOOLCHAIN/bin/x86_64-linux-android21-clang"
 
 export RUSTUP_TOOLCHAIN=$(cat "$(dirname "$0")/rust-toolchain")
@@ -116,7 +116,7 @@ unset CPATH
 
 if test -z $1 || test $1 = armeabi-v7a; then
     echo "-- cross compiling to armv7-linux-androideabi (arm) --"
-    TARGET_CC="$TOOLCHAIN/bin/armv7a-linux-androideabi16-clang" \
+    TARGET_CC="$TOOLCHAIN/bin/armv7a-linux-androideabi21-clang" \
     TARGET_AR="$TOOLCHAIN/bin/llvm-ar" \
     TARGET_RANLIB="$TOOLCHAIN/bin/llvm-ranlib" \
     cargo build $RELEASEFLAG --target armv7-linux-androideabi -p deltachat_ffi --features jsonrpc
@@ -134,7 +134,7 @@ fi
 
 if test -z $1 || test $1 = x86; then
     echo "-- cross compiling to i686-linux-android (x86) --"
-    TARGET_CC="$TOOLCHAIN/bin/i686-linux-android16-clang" \
+    TARGET_CC="$TOOLCHAIN/bin/i686-linux-android21-clang" \
     TARGET_AR="$TOOLCHAIN/bin/llvm-ar" \
     TARGET_RANLIB="$TOOLCHAIN/bin/llvm-ranlib" \
     cargo build $RELEASEFLAG --target i686-linux-android -p deltachat_ffi --features jsonrpc