Re: global variab­le and global function na­mes are the same - result­ is segfault

[Jonathan Wakely]

On 14 October 2011 20:08,  <tadam@pisem.net> wrote:
> Hi all,
> Is there any "magic" gcc option which would prevent linker successfully link the following program:
> ------------------------ file test1.c ---------------------------
> int foo;
> ------------------------ file test2.c ---------------------------
> int  foo(int a);
> int main (int argc, char argv[]){   foo(0);   return 0;}
> Compilation and linking with gcc test1.c test2.c -o test
> and run./test
> gives segmentation fault on my Ubuntu x86 machine.
> What I see is that the linker successfully links foo global variable as a global function, which is a nonsense to me.Please advice.
> Thank you,--Adel

This is a fundamental feature of the C language.  Using C++ will
"solve" your problem, because the linker would see different symbol
names for a variable "foo" and  function "int foo(int)"