GNU's C Language Extensions
By M. Tim Jones, May 01, 2005
GNU's GCC compiler has a number of interesting and useful ISO C99 and non-ISO extensions (among others) to C that are commonly overlooked. These features can help simplify the development of C applications and make them easier to debug.
May, 2005: GNU's C Language Extensions
Listing 4
1: #include <stdio.h>
2:
3: void __cyg_profile_func_enter( void *, void * )
4: __attribute__ ((no_instrument_function));
5:
6: void __cyg_profile_func_enter(void *this, void *callsite)
7: {
8: printf("%p\n", (int)this);
9: }
10:
11:
12: void func_c( void )
13: {
14: return;
15: }
16:
17: void func_b( void )
18: {
19: func_c();
20:
21: return;
22: }
23:
24: void func_a( void )
25: {
26: func_b();
27:
28: return;
29: }
30:
31:
32: int main()
33: {
34: func_a();
35: func_c();
36: }
