grpc-native: Working linux arm64 and x64

Author: Jozott00

cinterop-c/.bazelrc

@@ -1,8 +1,4 @@
 build --experimental_cc_static_library  --experimental_platform_in_output_dir
-build --action_env=KONAN_HOME
-build --host_action_env=KONAN_HOME
-build --cxxopt=-std=c++17
-build --host_cxxopt=-std=c++17
 
 build:release --compilation_mode=opt --strip=always
 
@@ -11,6 +7,6 @@ build:macos_x64 --platforms=@build_bazel_apple_support//platforms:macos_x86_64 -
 build:ios_arm64 --platforms=@build_bazel_apple_support//platforms:ios_arm64 --apple_platform_type=ios
 build:ios_simulator_arm64 --platforms=@build_bazel_apple_support//platforms:ios_sim_arm64 --apple_platform_type=ios
 build:ios_x64 --platforms=@build_bazel_apple_support//platforms:ios_x86_64 --apple_platform_type=ios
-build:linux_arm64 --platforms=@toolchains_llvm//platforms:linux-aarch64
 
-build:linux_x64 --platforms=@toolchains_llvm//platforms:linux-x86_64
+build:linux_arm64 --platforms=//platforms:linux_arm64
+build:linux_x64 --platforms=//platforms:linux_x86_64

cinterop-c/MODULE.bazel

@@ -29,10 +29,7 @@ bazel_dep(
 
 # Linux toolchain setup (cross-compile)
 
-#TODO: Remove
-bazel_dep(name = "toolchains_llvm", version = "1.4.0")
-
 register_toolchains(
     "//toolchain:toolchain_linux_x64_konan",
-    #    "//toolchain:exec_macos_konan",
+    "//toolchain:toolchain_linux_arm64_konan",
 )

cinterop-c/MODULE.bazel.lock

@@ -21,3 +21,12 @@ The binary can be updated by running
 ```bash
 ./gradlew :grpc:grpc-core:buildDependencyCLibGrpc_fat_iosArm64
 ```
+
+### Compiling for Linux
+
+To produce K/N compatible static libraries, we use the Konan toolchain for compilation.
+The Bazel toolchain is specified in `toolchain/` and requires the user to specify the
+`KONAN_HOME` variable like
+```bash
+bazel build //:protowire --config=linux_arm64 --define=KONAN_HOME=$HOME/.konan/kotlin-native-prebuilt-macos-aarch64-2.2.10
+```

cinterop-c/README.md

@@ -9,25 +9,28 @@ trap 'echo "ERROR: Build failed at ${BASH_SOURCE}:${LINENO}" >&2' ERR
 # Builds a static library for a specific platform (os/arch).
 #
 # Usage:
-#   ./build_target.sh //path:libtarget dest konan_target
+#   ./build_target.sh //path:libtarget dest konan_target konan_home
 # Example:
-#   ./build_target.sh :protowire_static out/libprotowire_static.ios_arm64.a ios_arm64
+#   ./build_target.sh :protowire_static out/libprotowire_static.ios_arm64.a ios_arm64 \
+#             $HOME/.konan/kotlin-native-prebuilt-macos-aarch64-2.2.10
 #
 # The example will produce ./out/libprotowire_static.ios_arm64.a
 
 LABEL="${1:?need bazel target label}"
 DST="${2:?need output destination}"
-KONANT_TARGET="${3:?need the konan_target name}"
+KONAN_TARGET="${3:?need the konan_target name}"
+KONAN_HOME="${4:?need the konan_home path}"
 
 CONFIG=release
 
-mkdir -p $(dirname "$DST")
+mkdir -p "$(dirname "$DST")"
 
 echo "==> Building $LABEL to $DST" >&2
-bazel build "$LABEL" --config="$KONANT_TARGET" --config="$CONFIG" >/dev/null
+KONAN_DEP="--define=KONAN_DEPS=/Users/johannes.zottele/.konan//dependencies"
+bazel build "$LABEL" --config="$KONAN_TARGET" --config="$CONFIG" $KONAN_DEP "--define=KONAN_HOME=$KONAN_HOME" >/dev/null
 
 # Ask Bazel what file(s) this target produced under this platform
-out="$(bazel cquery "$LABEL" --config="$KONANT_TARGET" --config="$CONFIG" --output=files | head -n1)"
+out="$(bazel cquery "$LABEL" --config="$KONAN_TARGET" --config="$CONFIG" $KONAN_DEP "--define=KONAN_HOME=$KONAN_HOME" --output=files | head -n1)"
 [[ -n "$out" ]] || { echo "No output for $LABEL ($SHORT)"; exit 1; }
 
 cp -f "$out" "$DST"

cinterop-c/build_target.sh

@@ -9,7 +9,6 @@
 
 #include <stdbool.h>
 #include <grpc/grpc.h>
-#include <version>
 
 #ifdef __cplusplus
 extern "C" {

cinterop-c/include/kgrpc.h

@@ -0,0 +1,15 @@
+platform(
+    name = "linux_x86_64",
+    constraint_values = [
+        "@platforms//os:linux",
+        "@platforms//cpu:x86_64",
+    ],
+)
+
+platform(
+    name = "linux_arm64",
+    constraint_values = [
+        "@platforms//os:linux",
+        "@platforms//cpu:aarch64",
+    ],
+)

cinterop-c/platforms/BUILD.bazel

@@ -1 +1 @@
-fcd6d34d6ea4adbf935d0fcbacef91666427bb5f6386fb0eb37b21a460ecbba5
+5eab3ed3bebb20944f053cacf34c755173832ab65e1c7f199a5d70fb3f1e7d55