linker-errors

问题 I'm trying to build an application with boost library by creating a MSVC9.0 project files with CMake. I get the following error: Error 3 fatal error LNK1104: cannot open file 'libboost_system-vc90-mt-gd-1_44.lib' Here is the CMake configuration cmake_minimum_required(VERSION 2.8) PROJECT( TestProject) ADD_DEFINITIONS(-D_CRT_SECURE_NO_WARNINGS) set(BOOST_ROOT "D:/boost_1_44_0") set(Boost_USE_MULTITHREADED ON) FIND_PACKAGE( Boost 1.44.0 REQUIRED unit_test_framework system) INCLUDE_DIRECTORIES($

问题 I have this simple code: max = (int) sqrt (number); and in the header I have: #include <math.h> But application still says undefined reference to sqrt . Do you see any problem here? It looks like everything should be okay. 回答1: You may find that you have to link with the math libraries on whatever system you're using, something like: gcc -o myprog myprog.c -L/path/to/libs -lm ^^^ - this bit here. Including headers lets a compiler know about function declarations but it does not necessarily

问题 This question already has answers here : Mysql_real_escape_string() A link to the server could not be established (3 answers) Closed 6 years ago . I got this warning message when executing my PHP script in Internet webserver, but in local wamp it is working without warnings. what is the reason ? Warning: mysql_real_escape_string() [function.mysql-real-escape-string]: A link to the server could not be established in /home/deport/public_html/abc/index.php on line 209 回答1: mysql_real_escape

问题 This question already has answers here : Mysql_real_escape_string() A link to the server could not be established (3 answers) Closed 6 years ago . I got this warning message when executing my PHP script in Internet webserver, but in local wamp it is working without warnings. what is the reason ? Warning: mysql_real_escape_string() [function.mysql-real-escape-string]: A link to the server could not be established in /home/deport/public_html/abc/index.php on line 209 回答1: mysql_real_escape

问题 I am trying to run the code which is written using C and that is for a dialogic board dmv 960A 4T1pci . I am trying to convert that code to a DLL but I am facing 34 errors which are almost same , here is the list of them: Linking... Creating library Debug/drivendll.lib and object Debug/drivendll.exp drivendll.obj : error LNK2001: unresolved external symbol _sr_waitevt drivendll.obj : error LNK2001: unresolved external symbol _gc_CCLibStatusEx drivendll.obj : error LNK2001: unresolved external

问题 import com.google.example.games.basegameutils.GameHelper; public class MyAppName extends Cocos2dxActivity implements GameHelper.GameHelperListener { .... ..... public static GameHelper gameHelper; @Override protected void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); gameHelper = new GameHelper(this); ..... error point: gameHelper = new GameHelper(this); error Message : Could not find class 'com.google.example.games.basegameutils.GameHelper', referenced from method

问题 I'm getting error regarding duplicate symbols for architecture armv7. In my ~/Library/Developer/Xcode/DerivedData/Lyearn-grsqfwtcaisfvocmxxxiqgoezpco/Build/Products/Debug-iphoneos the following files exists: libEGOCache.a libPods-EGOCache.a libPods-UAProgressView.a libSDWebImage.a libFSImageViewer.a libPods-FSImageViewer.a libPods-WebASDKImageManager.a libUAProgressView.a libPods-AFNetworking.a libPods-ICViewPager.a libPods-pop.a libWebASDKImageManager.a libPods-AsyncDisplayKit.a libPods

问题 What are undefined reference/unresolved external symbol errors? What are common causes and how to fix/prevent them? Feel free to edit/add your own. 回答1: Compiling a C++ program takes place in several steps, as specified by 2.2 (credits to Keith Thompson for the reference): The precedence among the syntax rules of translation is specified by the following phases [see footnote] . Physical source file characters are mapped, in an implementation-defined manner, to the basic source character set

问题 When I import Flurry as per the instructions here: https://developer.yahoo.com/flurry/docs/integrateflurry/ios/ I get the following error after following all the instructions and trying to run: I have tried the following after much research: Check my Compile Source in Build Phases - all was OK 'Clean'and re-run - Nothing Deleting and re-importing - No Good Checking to see if my riding header is exposed in Build Settings - all was OK The weird thing is when I create a brand new project and

问题 i am getting this error when i am performing archive for my app. linker command failed with exit code 1 (use -v to see invocation) can any one help me to solve this. Thanks 回答1: So many different problems for the same error message. 1) if you had two same constants in different classes then also this issue happens. 2) if you have accidently imported a .m file instead of .h file in an implementation file. 3) This error can also be occurred if you have imported two different versions of same