Android NDK build with the ONLY_CBLAS=0 argument #4952
Comments
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Does it build when you leave out the entire |
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No, the build also fails if I leave out the entire |
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Ok, there seems to be something "historically" weird with the CMake build - contrary to the Makefile settings, it uses (and for NDK r27 one also needs to increase the ancient cmake_minimum_required in CMakeLists.txt to at least 3.3.0 to avoid some confusing errors - android/ndk#2032 |
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Ok, to let you know, the build was successfully completed by changing the argument you mentioned with the another Android target version. I targeted I also confirmed that it works without any linking errors as a third party. Thank you once again, and I'll share the build script here to prevent others from experiencing the same difficulties: #!/bin/bash
set -e
NDK_TARGET_VERSION=25.1.8937393
TARGET_ANDROID_PLATFORM=android-27
ABIS=("arm64-v8a" "armeabi-v7a" "x86" "x86_64")
if [ "$(uname)" == 'Darwin' ]; then
NDK_DIR="$HOME/Library/Android/sdk/ndk"
else
NDK_DIR="$HOME/Android/Sdk/ndk"
fi
if [ ! -d "$NDK_DIR" ]; then
echo "-- Cannot find NDK directory: $NDK_DIR"
exit 1
fi
NDK_PATH="$NDK_DIR/$NDK_TARGET_VERSION/build/cmake/android.toolchain.cmake"
if [ ! -f "$NDK_PATH" ]; then
echo "-- Cannot find NDK toolchain: $NDK_PATH, Please download NDK $NDK_TARGET_VERSION first"
exit 1
fi
echo "-- Android toolchain file has found: $NDK_PATH"
if [ -z "$MAX_JOBS" ]; then
if [ "$(uname)" == 'Darwin' ]; then
MAX_JOBS=$(sysctl -n hw.ncpu)
else
MAX_JOBS=$(nproc)
fi
fi
for ABI in "${ABIS[@]}"
do
# Build directory for the current ABI
BUILD_DIR="build/android_$ABI"
# Remove existing build directory if it exists
if [ -d "$BUILD_DIR" ]; then
rm -rf $BUILD_DIR
fi
# Create build directory
mkdir -p $BUILD_DIR
CMAKE_ARGS=()
if [ -x "$(command -v ninja)" ]; then
CMAKE_ARGS+=("-GNinja")
fi
CMAKE_ARGS+=("-DCMAKE_BUILD_TYPE=Release")
CMAKE_ARGS+=("-DANDROID_USE_LEGACY_TOOLCHAIN_FILE=OFF")
CMAKE_ARGS+=("-DCMAKE_INSTALL_PREFIX=$BUILD_DIR/install")
CMAKE_ARGS+=("-DCMAKE_TOOLCHAIN_FILE=$NDK_PATH")
CMAKE_ARGS+=("-DANDROID_PLATFORM=$TARGET_ANDROID_PLATFORM")
CMAKE_ARGS+=("-DANDROID_ABI=$ABI")
CMAKE_ARGS+=("-DBUILD_STATIC_LIBS=ON")
CMAKE_ARGS+=("-DBUILD_SHARED_LIBS=OFF")
CMAKE_ARGS+=("-DBUILD_TESTING=OFF")
# CMAKE_ARGS+=("-DONLY_CBLAS=0")
CMAKE_ARGS+=("-DBUILD_WITHOUT_CBLAS=0")
if [ $ABI == "arm64-v8a" ]; then
CMAKE_ARGS+=("-DTARGET=CORTEXA57")
CMAKE_ARGS+=("-DBINARY=64")
elif [ $ABI == "armeabi-v7a" ]; then
CMAKE_ARGS+=("-DTARGET=ARMV7")
elif [ $ABI == "x86" ]; then
CMAKE_ARGS+=("-DTARGET=ATOM")
elif [ $ABI == "x86_64" ]; then
CMAKE_ARGS+=("-DTARGET=ATOM")
CMAKE_ARGS+=("-DBINARY=64")
fi
# Run CMake configuration
cmake -S . -B $BUILD_DIR "${CMAKE_ARGS[@]}"
# Build and install
cmake --build $BUILD_DIR --target install -- "-j${MAX_JOBS}"
done
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Hello, I have read through all of #2005 and confirmed that it can be successfully built using the NDK r25 cmake toolchain along with the
ONLY_CBLAS=1parameter. Currently, I am trying to buildOpenBLAS-r0.3.28as a dynamic library for the Android environment, and my host environment is Apple Silicon macOS right now.However, when I set ONLY_CBLAS=0 for the Android build, I end up with undefined symbol errors for functions like cabsf at the end of the build.
If I build with
ONLY_CBLAS=0on macOS Apple Clang instead of using the Android toolchain, the build completes smoothly though. (And as I mentioned earlier, passing theONLY_CBLAS=1parameter in Android allows it to build successfully.)I would appreciate it if somebody could explain why this is not working well.
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