cmake-hello-world/
├── CMakeLists.txt
├── linux-android.toolchain.cmake
└── src
├── main.cpp
└── TestHello
├── test.cpp
└── test.h
CMakeLists.txt (下面還有一個，比較好用, Cross compile for Android)
APP_STL := c++_shared or c++_staticcmake_minimum_required (VERSION 3.10) project (CMakeHelloWorld) #version number set (CMakeHelloWorld_VERSION_MAJOR 1) set (CMakeHelloWorld_VERSION_MINOR 0) message (STATUS "CXX is $ENV{CXX}") set(argument_list) option(USE_ANDROID "" OFF) #OFF by default if (USE_ANDROID) set (CMAKE_ANDROID_ARCH_ABI arm64-v8a) set (ANDROID_STL "c++_static") set (CMAKE_CXX_COMPILER $ENV{CXX}) set (CMAKE_AR $ENV{AR}) set (CMAKE_RANLIB $ENV{RANLIB}) set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11") endif() include_directories(src/TestHello) # 指定 include header path set(HELLO_SOURCES src/TestHello/test.cpp) # 設定變數, 將第二個所給予的內容指定到第一個變數名稱當中 #set(HELLO_SOURCES src/HelloWorld.cpp) set(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/lib) # PROJECT....是CMAKE寫好的變數 set(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin) #add_library(test_hello SHARED src/main.cpp src/TestHello/test.cpp src/TestHello/test.h) add_library(hello ${HELLO_SOURCES}) #add_library(hello2 ${HELLO_SOURCES2}) add_executable(main src/main.cpp ${HELLO_SOURCES}) # 產生可執行檔 if (USE_ANDROID) #target_link_libraries需寫在add_executable的下方 target_link_libraries(main hello-latomic -lc++_static -lc++abi) else()target_link_libraries(main hello) endif()
不要在ndk中使用系统预编译好的C++库
main.cpp
#include <test.h>
using namespace std;
int main(void)
{
Test t;
t.Hello();
}
test.cpp
#include "test.h"
using namespace std;
void Test::Hello(void)
{
cout << "Hello, world!\n" << endl;
}
test.h
#include <stdio.h>
#include <iostream>
using namespace std;
class Test{
public:
void Hello (void);
};
compile
$ mkdir build; cd build
$ cmake ..
or
$ cmake -D USE_ANDROID=ON ..
沒有問題後
$ cd build
$ make
ref:
1. cmake
2. How to cross-compile for embedded with CMake like a champ
3. 不要在ndk中使用系统预编译好的C++库
4. CMake 入門/運算子
5. 关于安卓的交叉编译
CMakeLists.txt
cmake_minimum_required (VERSION 3.10) project (CMakeHelloWorld) #version number set (CMakeHelloWorld_VERSION_MAJOR 1) set (CMakeHelloWorld_VERSION_MINOR 0) message (STATUS "CXX is $ENV{CXX}") set(argument_list) option(USE_ANDROID "" OFF) #OFF by default if (USE_ANDROID) set (CMAKE_ANDROID_ARCH_ABI arm64-v8a) set (ANDROID_STL "c++_static") set (CMAKE_CXX_COMPILER $ENV{CXX}) set (CMAKE_AR $ENV{AR}) set (CMAKE_RANLIB $ENV{RANLIB}) set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") endif() include(CheckCXXCompilerFlag) CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11) CHECK_CXX_COMPILER_FLAG("-std=c++0x" COMPILER_SUPPORTS_CXX0X) if(COMPILER_SUPPORTS_CXX11) set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11") elseif(COMPILER_SUPPORTS_CXX0X) set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x") else() message(STATUS "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support. Please use a different C++ compiler.") endif() include_directories(src/TestHello) # 指定 include header path #set(HELLO_SOURCES src/TestHello/test.cpp) # 設定變數, 將第二個所給予的內容指定到第一個變數名稱當中 file(GLOB SOURCES src/TestHello/*.cpp src/TestHello/*.h) #set(HELLO_SOURCES src/HelloWorld.cpp) set(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/lib) # PROJECT....是CMAKE寫好的變數 set(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin) #add_library(test_hello SHARED src/main.cpp src/TestHello/test.cpp src/TestHello/test.h) #add_library(hello ${HELLO_SOURCES}) #add_library(hello2 ${HELLO_SOURCES2}) add_executable(main src/main.cpp ${SOURCES}) # 產生可執行檔 if (USE_ANDROID) target_link_libraries(main-latomic -lc++_static -lc++abi) else()target_link_libraries(main)endif()
linux-android.toolchain.cmake
if (USE_ANDROID)
if (NOT NDKDIR)
message(FATAL_ERROR "Set NDK_DIR, Recommended version 22.1.7171670")
endif()
#set (NDK "/opt/android_studio/sdk/ndk/22.1.7171670")
set (TOOLCHAIN "${NDKDIR}/toolchains/llvm/prebuilt/linux-x86_64")
#set (CMAKE_ANDROID_API 29)
set (ANDROID_STL "c++_static")
if (${CMAKE_ANDROID_ARCH_ABI} STREQUAL "arm64-v8a")
set (TARGET "aarch64-linux-android")
elseif (${CMAKE_ANDROID_ARCH_ABI} STREQUAL "armeabi-v7a")
set (TARGET "armv7a-linux-androideabi")
else()
set (TARGET "x86_64-linux-android")
endif()
set (CMAKE_C_COMPILER ${TOOLCHAIN}/bin/${TARGET}${CMAKE_ANDROID_API}-clang)
message (STATUS "1111111111 is ${CMAKE_C_COMPILER}")
set (CMAKE_CXX_COMPILER ${TOOLCHAIN}/bin/${TARGET}${CMAKE_ANDROID_API}-clang++)
set (CMAKE_AR ${TOOLCHAIN}/bin/${TARGET}$-ar)
set (CMAKE_RANLIB ${TOOLCHAIN}/bin/${TARGET}$-ranlib)
# set searching rules for cross-compiler
SET (CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
SET (CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET (CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
endif()
compile
$ mkdir build; cd build
$ cmake -D USE_ANDROID=ON -D CMAKE_TOOLCHAIN_FILE=../linux-android.toolchain.cmake -D NDKDIR=/opt/android_studio/sdk/ndk/22.1.7171670 -D CMAKE_ANDROID_ARCH_ABI=arm64-v8a -D CMAKE_ANDROID_API=29 ..
沒有問題後
$ make
