libgurobi_c++.a was compiled with -fno-stack-protector (obviously). A few things come to mind: add -fstack-protector when linking. This will make sure that libssp gets linked. Manually link -lssp Make your dummy version of __stack_chk_fail(void) in it’s own object file and and add this .o file to your linker command AFTER libgurobi_c++.a. GCC/G++ resolves symbols from left … Read more
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
You need to use the export keyword. However, I don’t think G++ has proper support, so you need to include the template function’s definition in the header so the translation unit can use it. This is because the <int> ‘version’ of the template hasn’t been created, only the <typename T> ‘version.’ An easy way is … Read more
You need to change your makefile so that the -lncurses directive comes after your object code on the gcc command line, i.e. it needs to generate the command: gcc -W -Wall -Werror -Wextra -I./Includes/. -o Sources/NCurses/ncurses_init.o -c Sources/NCurses/ncurses_init.c -lncurses This is because object files and libraries are linked in order in a single pass.
However, avpicture_get_size is defined. No, as the header (<libavcodec/avcodec.h>) just declares it. The definition is in the library itself. So you might like to add the linker option to link libavcodec when invoking gcc: -lavcodec Please also note that libraries need to be specified on the command line after the files needing them: gcc -I$HOME/ffmpeg/include … Read more
My recommendation is to start simple, and then complicate your project further. Let me try to explain how linking works in CMake. The idea is that you build modules in CMake, and link them together. Let’s ignore header files for now, as they can be all included in your source files. Say you have file1.cpp, … Read more
DSO here means Dynamic Shared Object; since the error message says it’s missing from the command line, I guess you have to add it to the command line. That is, try adding -lpthread to your command line.
Use g++ main.cpp Help.cpp You have to tell the compiler all the files that you want it to compile, not just the first one.
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
If Obstacle is an abstract base class, then make sure you declare all its virtual methods “pure virtual”: virtual void Method() = 0; The = 0 tells the compiler that this method must be overridden by a derived class, and might not have its own implementation. If the class contains any non-pure virtual functions, then … Read more