linker-errors

I'm trying to use glew in my Xcode project, but I'm getting this: Apple Mach-O Linker (Id) Error... Undefined symbols for architecture x86_64 I'm using the current version of glew that I downloaded from their sourceforge site . Here's what I did: Install Glew via MacPorts. (in terminal run the command sudo port install glew ) In the Xcode project's build settings add the following: other linker flags: -lGLEW header search paths: /opt/local/include/ library search paths: /opt/local/lib/ You aren't linking with the GLEW library. You will probably have to add the directory, you installed GLES

I have a mem_malloc() and mem_free() defined for me and I want to use them to replace the malloc() and free() and consequently C++'s new and delete. I define them as follows: extern "C" { extern void *mem_malloc(size_t); extern void mem_free(void *); void * malloc(size_t size) { return mem_malloc(size); } void free(void *memory) { mem_free(memory); } } However, I get two link errors: [user@machine test]$ g++ -m32 -pthread main.cpp -static libmemnmf-O.a /usr/lib/../lib/libc.a(malloc.o): In function `free': (.text+0x153c): multiple definition of `free' /tmp/ccD2Mgln.o:main.cpp:(.text+0x842):

Consider the following sample code: #include <iostream> using namespace std; class base { public: base() { bar(); //Line1 this->bar(); //Line2 base *bptr = this; bptr->bar(); //Line3 ((base*)(this))->bar(); //Line4 } virtual void bar() = 0; }; class derived: base { public: void bar() { cout << "vfunc in derived class\n"; } }; int main() { derived d; } The above code has pure virtual function bar() in base class which is overriden in the derived class. The pure virtual function bar() has no definition in base class. Now focus on Line1 , Line2 , Line3 and Line4 . I understand : Line1 gives

I'm trying to build Boost 1.55 with Visual Studio 2013. 1) I tried to use boost-binaries ( boost-binaries ), but Visual Studio wrote about the error, when I tried to compile: error LNK1104: cannot open file 'libboost_serialization-vc120-mt-gd-1_55.lib'. I used boost_1_55_0-msvc-12.0-32.exe or 1.55.0-build2 (boost-binaries). I didn't find that .lib file in the boost_1_55_0\lib32-msvc-12.0 directory. 2) I also tried to use this program BlueGo 0.1.7 ( BlueGo ). It works very smooth, and create all libraries, which I am needed. The problem in that it creates .lib files like this: libboost

I am currently trying to compile a Contraction Hierachies implementation by KIT which requires Boost::Regex. The supplied Makefile already makes sure (and I have also double-checked this manually) that g++ is supplied with the -lboost_regex switch. If the library is not installed, g++ will complain. So I installed the library from my package sources and tried compiling again. This time I am getting a huge load of linker errors regarding Boost::Regex. Here is a short excerpt: main.o: In function `boost::re_detail::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::string>, std:

I took the source of AndEngine from their git repo, downloaded a fresh AndroidStudio, sdk and ndk,imported it, and tried to creat a simple new empty GameActivity extends BaseGameActivity. But I could not start it, cause I get the following errors: /home/uhu/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: /home/uhu/AndroidStudioProjects/aaa/andEngine/build/intermediates/ndk/release/obj/local/armeabi-v7a/objs/andengine_shared//home/uhu/AndroidStudioProjects/aaa/andEngine/src/main/jni/src