When I run my app in cocos2d, it prints the error:
2> Creating library C:\Users\Will\Documents\Projects\Home\proj.win32\Debug.win32\Home.lib and object C:\Users\Will\Documents\Projects\Home\proj.win32\Debug.win32\Home.exp 2>AppDelegate.obj : error LNK2001: unresolved external symbol "void * firebase::g_admob_initializer" (?g_admob_initializer@firebase@@3PAXA) 2>C:\Users\Will\Documents\Projects\Home\proj.win32\Debug.win32\Home.exe : fatal error LNK1120: 1 unresolved externals ========== Build: 1 succeeded, 1 failed, 4 up-to-date, 0 skipped ==========
I have no idea why. My app is literally the default cocos2d app, with the addition of the information in the firebase tutorial. All I did was include firebase\admob.h and it causes the error. It doesn’t cause the error when I include firebase\app.h for some reason.
cocos2d verison: 3.15.1
NDK: v15
SDK: 26.0.0
It’s saying unresolved external symbol, so I’m guessing that it has something to do with linking, but in my Android.mk, I link it.
app\jni\Android.mk
LOCAL_PATH := $(call my-dir)
# The path to the Firebase C++ SDK, in the project's root directory.
FIREBASE_CPP_SDK_DIR := ../../../firebase_cpp_sdk
APP_ABI := armeabi-v7a x86
STL := $(firstword $(subst _, ,$(APP_STL)))
FIREBASE_LIBRARY_PATH := $(FIREBASE_CPP_SDK_DIR)/libs/android/$(TARGET_ARCH_ABI)/$(STL)
include $(CLEAR_VARS)
LOCAL_MODULE := firebase_app
LOCAL_SRC_FILES := $(FIREBASE_LIBRARY_PATH)/libapp.a
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/$(FIREBASE_CPP_SDK_DIR)/include
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := firebase_admob
LOCAL_SRC_FILES := $(FIREBASE_LIBRARY_PATH)/libadmob.a
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/$(FIREBASE_CPP_SDK_DIR)/include
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
$(call import-add-path,$(LOCAL_PATH)/../../../cocos2d)
$(call import-add-path,$(LOCAL_PATH)/../../../cocos2d/external)
$(call import-add-path,$(LOCAL_PATH)/../../../cocos2d/cocos)
$(call import-add-path,$(LOCAL_PATH)/../../../cocos2d/cocos/audio/include)
LOCAL_MODULE := MyGame_shared
LOCAL_MODULE_FILENAME := libMyGame
LOCAL_SRC_FILES := hellocpp/main.cpp \
../../../Classes/AppDelegate.cpp \
../../../Classes/HelloWorldScene.cpp
LOCAL_C_INCLUDES := $(LOCAL_PATH)/../../../Classes
# _COCOS_HEADER_ANDROID_BEGIN
# _COCOS_HEADER_ANDROID_END
LOCAL_STATIC_LIBRARIES := cocos2dx_static
LOCAL_STATIC_LIBRARIES += firebase_app
LOCAL_STATIC_LIBRARIES += firebase_admob
# _COCOS_LIB_ANDROID_BEGIN
# _COCOS_LIB_ANDROID_END
include $(BUILD_SHARED_LIBRARY)
$(call import-module,.)
# _COCOS_LIB_IMPORT_ANDROID_BEGIN
# _COCOS_LIB_IMPORT_ANDROID_END
build.gradle
import org.apache.tools.ant.taskdefs.condition.Os
apply plugin: 'com.android.application'
android {
compileSdkVersion 22
buildToolsVersion "25.0.0"
defaultConfig {
applicationId "com.call.home"
minSdkVersion 14
targetSdkVersion PROP_TARGET_SDK_VERSION
versionCode 1
versionName "1.0"
externalNativeBuild {
ndkBuild {
if (!project.hasProperty("PROP_NDK_MODE") || PROP_NDK_MODE.compareTo('none') != 0) {
// skip the NDK Build step if PROP_NDK_MODE is none
targets 'MyGame'
arguments 'NDK_TOOLCHAIN_VERSION=4.9'
arguments 'APP_PLATFORM=android-'+PROP_TARGET_SDK_VERSION
def module_paths = [project.file("../../cocos2d").absolutePath,
project.file("../../cocos2d/cocos").absolutePath,
project.file("../../cocos2d/external").absolutePath]
if (Os.isFamily(Os.FAMILY_WINDOWS)) {
// should use '/'
module_paths = module_paths.collect {it.replaceAll('\\\\', '/')}
arguments 'NDK_MODULE_PATH=' + module_paths.join(";")
}
else {
arguments 'NDK_MODULE_PATH=' + module_paths.join(':')
}
arguments '-j' + Runtime.runtime.availableProcessors()
abiFilters.addAll(PROP_APP_ABI.split(':').collect{it as String})
}
}
}
}
sourceSets.main {
java.srcDir "src"
res.srcDir "res"
manifest.srcFile "AndroidManifest.xml"
assets.srcDir "../../Resources"
}
externalNativeBuild {
ndkBuild {
if (!project.hasProperty("PROP_NDK_MODE") || PROP_NDK_MODE.compareTo('none') != 0) {
// skip the NDK Build step if PROP_NDK_MODE is none
path "jni/Android.mk"
}
}
}
signingConfigs {
release {
if (project.hasProperty("RELEASE_STORE_FILE")) {
storeFile file(RELEASE_STORE_FILE)
storePassword RELEASE_STORE_PASSWORD
keyAlias RELEASE_KEY_ALIAS
keyPassword RELEASE_KEY_PASSWORD
}
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
if (project.hasProperty("RELEASE_STORE_FILE")) {
signingConfig signingConfigs.release
}
externalNativeBuild {
ndkBuild {
arguments 'NDK_DEBUG=0'
}
}
}
debug {
externalNativeBuild {
ndkBuild {
arguments 'NDK_DEBUG=1'
}
}
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile project(':libcocos2dx')
compile 'com.google.firebase:firebase-ads:11.4.0'
}
apply plugin: 'com.google.gms.google-services'
Just to note, this is only in Visual Studio. Compiling it in command prompt or Android Studio doesn’t create this problem.
Also noting, when I remove the line that says FIREBASE_APP_REGISTER_CALLBACKS_REFERENCE(admob)
from the admob.h file, it works. However, I’m worried that it’d screw something up down the line so I’ll hold of on that solution.