Build for Android -build aarch64 library的问题

[Andrawzyf]

当我编译build aarch64 library，执行cmake遇到如下问题：

zyn@ubuntu:/NCNN/ncnn/build-android-aarch64$ echo $NDK_HOME
/home/zyn/android-ndk-r13b
zyn@ubuntu:/NCNN/ncnn/build-android-aarch64$ cmake -DCMAKE_TOOLCHAIN_FILE=$NDK_HOME/build/cmake/android.toolchain.cmake \ -DANDROID_ABI="arm64-v8a" \ -DANDROID_PLATFORM=android-24 ..
-- CMAKE_TOOLCHAIN_FILE = /home/zyn/android-ndk-r13b/build/cmake/android.toolchain.cmake
-- CMAKE_INSTALL_PREFIX = /home/zyn/NCNN/ncnn/build-android-aarch64/install
-- Android: Selected GCC toolchain 'arm-linux-androideabi-4.9'
-- Check for working C compiler: /home/zyn/android-ndk-r13b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc
-- Check for working C compiler: /home/zyn/android-ndk-r13b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc -- broken
CMake Error at /usr/local/share/cmake-3.9/Modules/CMakeTestCCompiler.cmake:51 (message):
The C compiler
"/home/zyn/android-ndk-r13b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc"
is not able to compile a simple test program.

It fails with the following output:

Change Dir: /home/zyn/NCNN/ncnn/build-android-aarch64/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_fa591/fast"

/usr/bin/make -f CMakeFiles/cmTC_fa591.dir/build.make
CMakeFiles/cmTC_fa591.dir/build

make[1]: Entering directory
`/home/zyn/NCNN/ncnn/build-android-aarch64/CMakeFiles/CMakeTmp'

Building C object CMakeFiles/cmTC_fa591.dir/testCCompiler.c.o

/home/zyn/android-ndk-r13b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc
-target armv7-none-linux-androideabi
--sysroot=/home/zyn/android-ndk-r13b/platforms/android-24/arch-arm -isystem
/home/zyn/android-ndk-r13b/platforms/android-24/arch-arm/usr/include
-DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong
-no-canonical-prefixes -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16
-fno-integrated-as -mthumb -Wa,--noexecstack -Wformat
-Werror=format-security -O0 -fno-limit-debug-info -fPIE -o
CMakeFiles/cmTC_fa591.dir/testCCompiler.c.o -c
/home/zyn/NCNN/ncnn/build-android-aarch64/CMakeFiles/CMakeTmp/testCCompiler.c

arm-linux-androideabi-gcc: error: armv7-none-linux-androideabi: No such
file or directory

arm-linux-androideabi-gcc: error: unrecognized command line option
'-target'

arm-linux-androideabi-gcc: error: unrecognized command line option
'-fno-integrated-as'

arm-linux-androideabi-gcc: error: unrecognized command line option
'-fno-limit-debug-info'

make[1]: *** [CMakeFiles/cmTC_fa591.dir/testCCompiler.c.o] Error 1

make[1]: Leaving directory
`/home/zyn/NCNN/ncnn/build-android-aarch64/CMakeFiles/CMakeTmp'

make: *** [cmTC_fa591/fast] Error 2

[nihui]

you may try updating android ndk r15c or newer

[Andrawzyf]

@nihui just now i updated to android-ndk r16b,still faied

[nihui]

https://github.com/Tencent/ncnn/wiki/how-to-build#build-for-android