After struggling with this same problem and following all the accepted answers of updating build settings, clearing the linker search path, etc.. I finally discovered an answer that worked for me. Before building, make sure you select right type (iPhone Simulator) instead of iOS Device. Then rebuild. Otherwise, you’re trying to use a library built … Read more
Compile with gcc -masm=intel and don’t try to switch modes inside the asm template string. AFAIK there’s no equivalent before clang14 (Note: MacOS installs clang as gcc / g++ by default.) Also, of course you need to use valid GNU C inline asm, using operands to tell the compiler which C objects you want to … Read more
If not mistaken, you are using the sdk which just released by Facebook at September 10th, 2015 which named as FacebookSDKs-iOS-20150910.zip. Try to use sdk that released at August 13th, 2015 which named as FacebookSDKs-iOS-20150813.zip and report to Facebook about the duplication problem if you can. Thank you.
The problem is you are not linking against the Ws2_32.lib library. To fix this you can add that to your additional dependencies tab of linker/Input settings for your project. Alternatively (as pointed out by SChepurin in the comments) you can add #pragma comment(lib, “Ws2_32.lib”) to a source file of your project.
These functions are part of the C++ exception handling support for GCC. GCC supports two kinds of exception handling, one which is based on calls to setjmp and longjmp (sjlj exception handling), and another which is based on the DWARF debugging info format (DW2 exception handling). These sorts of linker errors will occur is you … Read more
strlwr() is not standard C function. Probably it’s provided by one implementation while the other compiler you use don’t. You can easily implement it yourself: #include <string.h> #include<ctype.h> char *strlwr(char *str) { unsigned char *p = (unsigned char *)str; while (*p) { *p = tolower((unsigned char)*p); p++; } return str; }
Don’t define variables in headers. Put declarations in header and definitions in one of the .c files. In config.h extern const char *names[]; In some .c file: const char *names[] = { “brian”, “stefan”, “steve” }; If you put a definition of a global variable in a header file, then this definition will go to … Read more
It is because the unit generated by MOC isn’t included in the linking process. Or maybe it isn’t generated at all. The first thing I’d do is to put the class declaration in a separate header file, perhaps the build system isn’t scanning implementation files. Another possibility is that the class in question once didn’t … Read more
Normally this sort of failure happens when compiling your C++ code by invoking the C front-end. The gcc you execute understands and compiles the file as C++, but doesn’t link it with the C++ libraries. Example: $ gcc example.cpp Undefined symbols for architecture x86_64: “std::cout”, referenced from: _main in ccLTUBHJ.o “std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> … Read more
How are you doing the compiling and linking? You’ll need to specify both files, something like: gcc testpoint.c point.c …so that it knows to link the functions from both together. With the code as it’s written right now, however, you’ll then run into the opposite problem: multiple definitions of main. You’ll need/want to eliminate one … Read more