How do I link object files in C? Fails with “Undefined symbols for architecture x86_64”

by

I assume you are using gcc, to simply link object files do:

$ gcc -o output file1.o file2.o

To get the object-files simply compile using

$ gcc -c file1.c

this yields file1.o and so on.

If you want to link your files to an executable do

$ gcc -o output file1.c file2.c

More Related Contents:

  1. Given the state of the stack and registers, can we predict the outcome of printf’s undefined behavior
  2. Is there a way to use gcc to convert C to MIPS?
  3. What is -ffreestanding option in gcc?
  4. Why we need Clobbered registers list in Inline Assembly?
  5. Removing trailing newline character from fgets() input
  6. C undefined behavior. Strict aliasing rule, or incorrect alignment? [duplicate]
  7. Undefined reference to `pow’ and `floor’
  8. Adding leading underscores to assembly symbols with GCC on Win32?
  9. What is the difference between C, C99, ANSI C and GNU C?
  10. aligned malloc() in GCC?
  11. Why didn’t gcc (or glibc) implement _s functions?
  12. How to access C variable for inline assembly manipulation?
  13. How to check if a given file descriptor stored in a variable is still valid?
  14. Detecting 64bit compile in C
  15. How to link to a static library in C?
  16. How to make gcc link strong symbol in static library to overwrite weak symbol?
  17. C function defined as int but having no return statement in the body still compiles
  18. How do header and source files in C work?
  19. multi-word addition using the carry flag
  20. Inline assembly that clobbers the red zone
  21. GCC 4.7 Source Character Encoding and Execution Character Encoding For String Literals?
  22. Compiler changes printf to puts
  23. How to tell GCC to generate 16-bit code for real mode
  24. How to get the size of a C function from inside a C program or with inline assembly?
  25. Why is execstack required to execute code on the heap?
  26. gcc detect duplicate symbols/functions in static libraries
  27. GCC – no warning about an uninitialized array with -O0
  28. Order of fields when using a bit field in C
  29. How much overhead can the -fPIC flag add?
  30. conflicting types error when compiling c program using gcc

Leave a Comment