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The macro debugging features are supported for +objdebug and +noobjdebug
compiler options.
14.9.2 Examples for Macro Debugging
The following example illustrates the use of the macro debugging:
Sample Program:
$ cat scope.c
1
2 #include <stdio.h>
3
4 #define USED1 100
5 #define USED2 200
6 #define UNUSED1 0
7 #define UNUSED2 0
8 #define DUMMY1
9 #define DUMMY2
10
11 int
12 main ()
13 {
14
15 int val = USED1;
16
17 #undef UNUSED1
18 #undef USED2
19 #undef USED1
20 #define USED1 101
21 #define USED2 201
22
23 val = USED1 + USED2;
24
25 #undef USED1
26 #undef UNUSED2
27 #undef USED2
28 #define USED1 102
29
30 val = USED1;
31
32 return 0;
33 }
Sample Debugging Session
• The following debugging session illustrates macro debugging when the program
is com- piled with +macro_debug=all option:
$ cc -g +macro_debug=all -o sc scope.c
$ gdb sc
HP gdb for HP Itanium (32 or 64 bit) and target HP-UX 11.2x.
Copyright 1986 - 2001 Free Software Foundation, Inc.
...
14.9 Debugging Macros 155