Why does GCC not warn for unreachable code?

by

gcc 4.4 will give you warning. In the later versions of gcc this feature (-Wunreachable-code) has been removed.

See here:
http://gcc.gnu.org/ml/gcc-help/2011-05/msg00360.html

The -Wunreachable-code has been removed, because it was unstable: it
relied on the optimizer, and so different versions of gcc would warn
about different code. The compiler still accepts and ignores the
command line option so that existing Makefiles are not broken. In
some future release the option will be removed entirely.

Ian

More Related Contents:

  1. How can I suppress “unused parameter” warnings in C?
  2. warning: incompatible implicit declaration of built-in function ‘xyz’
  3. How to print the address of a function?
  4. Is there a way to get warned about unused functions?
  5. Removing trailing newline character from fgets() input
  6. Modulo operation with negative numbers
  7. C undefined behavior. Strict aliasing rule, or incorrect alignment? [duplicate]
  8. Order of local variable allocation on the stack
  9. What is the meaning of lines starting with a hash sign and number like ‘# 1 “a.c”‘ in the gcc preprocessor output?
  10. Undefined reference to `pow’ and `floor’
  11. Adding leading underscores to assembly symbols with GCC on Win32?
  12. What is the difference between C, C99, ANSI C and GNU C?
  13. Why didn’t gcc (or glibc) implement _s functions?
  14. How to access C variable for inline assembly manipulation?
  15. How to check if a given file descriptor stored in a variable is still valid?
  16. Detecting 64bit compile in C
  17. How to make gcc link strong symbol in static library to overwrite weak symbol?
  18. C preprocessor: expand macro in a #warning
  19. multi-word addition using the carry flag
  20. Check glibc version for a particular gcc compiler
  21. Why we need Clobbered registers list in Inline Assembly?
  22. What is “…” in switch-case in C code
  23. How to link to a different libc file?
  24. C code with undefined results, compiler generates invalid code (with -O3)
  25. /usr/bin/ld: cannot find -lc while compiling with makefile
  26. How to compile and run C in sublime text 3?
  27. C11 in GCC?
  28. Produce loops without cmp instruction in GCC
  29. What exactly is -fno-builtin doing here?
  30. Integer overflow in C: standards and compilers

Leave a Comment