1
Ich versuche, C-Funktionen zu meiner Java Android App hinzuzufügen.
Ich habe bereits eine Grundfunktion Hallo Welt in C ausgeführt.
In dieser Datei hello.c rufe ich eine andere C-Funktion in einer anderen Datei (astart.c), die eine andere Funktion C in einer anderen Datei (util.c) die andere Funktionen in anderen Dateien aufruft.
Kein Problem, oder?Undefinierter Verweis auf Funktion mit Cmake in Android Studio
füge ich die Bibliotheken zu meinem CMakeLists.txt:
# Sets the minimum version of CMake required to build the native
# library. You should either keep the default value or only pass a
# value of 3.4.0 or lower.
cmake_minimum_required(VERSION 3.4.1)
# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds it for you.
# Gradle automatically packages shared libraries with your APK.
add_library(# Sets the name of the library.
native-lib
# Sets the library as a shared library.
SHARED
# Provides a relative path to your source file(s).
# Associated headers in the same location as their source
# file are automatically included.
src/main/cpp/native-lib.cpp)
add_library(hello
# Sets the library as a shared library.
SHARED
src/main/myCpp/hello.c)
add_library(astart
# Sets the library as a shared library.
SHARED
src/main/myCpp/astart.c)
add_library(ai
# Sets the library as a shared library.
SHARED
src/main/myCpp/lib/ai.c)
add_library(sha
# Sets the library as a shared library.
SHARED
src/main/myCpp/lib/sha.c)
add_library(util
# Sets the library as a shared library.
SHARED
src/main/myCpp/lib/util.c)
add_library(allnet_log
# Sets the library as a shared library.
SHARED
src/main/myCpp/lib/allnet_log.c)
#add_library(packet
# Sets the library as a shared library.
# SHARED
# src/main/myCpp/lib/packet.c)
add_library(configfiles
# Sets the library as a shared library.
SHARED
src/main/myCpp/lib/configfiles.c)
add_library(allnet_queue
# Sets the library as a shared library.
SHARED
src/main/myCpp/lib/allnet_queue.c)
# Add the directories where the Cpp header files are to let CMake find them during compile time
include_directories(src/main/myCpp/)
include_directories(src/main/myCpp/lib/)
# Searches for a specified prebuilt library and stores the path as a
# variable. Because system libraries are included in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.
find_library(# Sets the name of the path variable.
log-lib
# Specifies the name of the NDK library that
# you want CMake to locate.
log)
# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in the
# build script, prebuilt third-party libraries, or system libraries.
target_link_libraries(# Specifies the target library.
native-lib
# Links the target library to the log library
# included in the NDK.
${log-lib})
Meine gradle Datei:
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "25.0.0"
defaultConfig {
applicationId "com.example.hippolytelacassagne.allnet"
minSdkVersion 19
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
externalNativeBuild {
cmake {
cppFlags ""
cFlags "-fexceptions"
}
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
externalNativeBuild {
cmake {
path "CMakeLists.txt"
}
}
// If you want Gradle to package prebuilt native libraries
// with your APK, modify the default source set configuration
// to include the directory of your prebuilt .so files as follows.
sourceSets {
main {
jni.srcDirs = []
jniLibs.srcDirs 'imported-lib/src/', 'more-imported- libs/src/'
}
}
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.3.1'
testCompile 'junit:junit:4.12'
}
Mein hello.c in Home.java genannt:
#include <jni.h>
#include "lib/app_util.h"
#include "lib/packet.h"
#include "astart.c"
JNIEXPORT
jstring
JNICALL
Java_com_example_hippolytelacassagne_allnet_Home_Hello(
JNIEnv *env,
jobject callingObject)
{
char * args [] = { "allnet", "-v", "def", NULL };
astart_main(3, args);
return (*env)->NewStringUTF(env, "Hello World");
}
Die enthält, wenn astart.c in hallo.c gerufen wird:
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <signal.h>
#include <pwd.h>
#include <ifaddrs.h>
#include <dirent.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/if.h> /* IFF_LOOPBACK, etc */
#include <arpa/inet.h> /* inet_addr */
#include "lib/util.h"
#include "lib/allnet_log.h"
#include "lib/packet.h"
#include "lib/configfiles.h"
#include "lib/allnet_queue.h"
Und das schließt von util.c in astart.c genannt:
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <time.h>
#include <assert.h>
#include <errno.h>
#include <netdb.h> /* h_errno */
#include <dirent.h> /* h_errno */
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "packet.h"
#include "mgmt.h"
#include "allnet_log.h"
#include "util.h"
#include "ai.h"
#include "sha.h"
Und hier ist die Fehlermeldung der gradle Konsole:
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:externalNativeBuildDebug'.
> Build command failed.
Error while executing '/Users/hippolytelacassagne/Library/Android/sdk/cmake/3.6.4111459/bin/cmake' with arguments {--build /Users/hippolytelacassagne/AndroidStudioProjects/Allnet/app/.externalNativeBuild/cmake/debug/mips64 --target util}
[1/2] Building C object CMakeFiles/util.dir/src/main/myCpp/lib/util.c.o
[2/2] Linking C shared library ../../../../build/intermediates/cmake/debug/obj/mips64/libutil.so
FAILED: : && /Users/hippolytelacassagne/Library/Android/sdk/ndk-bundle/toolchains/llvm/prebuilt/darwin-x86_64/bin/clang --target=mips64el-none-linux-android --gcc-toolchain=/Users/hippolytelacassagne/Library/Android/sdk/ndk-bundle/toolchains/mips64el-linux-android-4.9/prebuilt/darwin-x86_64 --sysroot=/Users/hippolytelacassagne/Library/Android/sdk/ndk-bundle/sysroot -fPIC -isystem /Users/hippolytelacassagne/Library/Android/sdk/ndk-bundle/sysroot/usr/include/mips64el-linux-android -D__ANDROID_API__=21 -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -fintegrated-as -Wa,--noexecstack -Wformat -Werror=format-security -fexceptions -O0 -fno-limit-debug-info -Wl,--exclude-libs,libgcc.a --sysroot /Users/hippolytelacassagne/Library/Android/sdk/ndk-bundle/platforms/android-21/arch-mips64 -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libutil.so -o ../../../../build/intermediates/cmake/debug/obj/mips64/libutil.so CMakeFiles/util.dir/src/main/myCpp/lib/util.c.o -lm && :
CMakeFiles/util.dir/src/main/myCpp/lib/util.c.o: In function `mgmt_to_string':
/Users/hippolytelacassagne/AndroidStudioProjects/Allnet/app/src/main/myCpp/lib/util.c:245: undefined reference to `ia_to_string'
/Users/hippolytelacassagne/AndroidStudioProjects/Allnet/app/src/main/myCpp/lib/util.c:274: undefined reference to `ia_to_string'
CMakeFiles/util.dir/src/main/myCpp/lib/util.c.o: In function `init_packet':
/Users/hippolytelacassagne/AndroidStudioProjects/Allnet/app/src/main/myCpp/lib/util.c:532: undefined reference to `sha512_bytes'
CMakeFiles/util.dir/src/main/myCpp/lib/util.c.o: In function `print_gethostbyname_error':
/Users/hippolytelacassagne/AndroidStudioProjects/Allnet/app/src/main/myCpp/lib/util.c:1554: undefined reference to `log_print'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED
Es scheint, dass die Fehler kommen aus einige Funktionen von util.c.
Ich verstehe nicht, weil die Funktionen, die angeblich nicht definiert sind, in den enthaltenen Dateien definiert sind.
Hat jemand eine Idee? Vielen Dank.