[Bug binutils/16698] BFD (GNU Binutils) 2.24 assertion fail elf32-arm.c:12387

[maillist-gdb at barfooze dot de]

https://sourceware.org/bugzilla/show_bug.cgi?id=16698

maillist-gdb at barfooze dot de changed:

           What    |Removed                     |Added
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   Attachment #7638|0                           |1
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   Attachment #7663|0                           |1
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   Attachment #7670|0                           |1
        is obsolete|                            |
   Attachment #7671|0                           |1
        is obsolete|                            |

--- Comment #15 from maillist-gdb at barfooze dot de ---
Created attachment 7672
  --> https://sourceware.org/bugzilla/attachment.cgi?id=7672&action=edit
manually reduced testcase to the bare minimum

i manually reduced libc/stdin.c to the following

typedef struct _IO_FILE FILE;
struct _IO_FILE { int lock; };
static FILE f = {  .lock = -1};
FILE *const (stdin) = &f;

this construct, compiled with -g triggers the bug in another object that
references it in an unused function when linked with -s --gc-sections...

for example:

 typedef struct _IO_FILE FILE;
extern FILE *const stdin;

typedef struct pcap pcap_t;
struct pcap_sf {  FILE *rfile;  };
struct pcap {       struct pcap_sf sf;  };

static void unused_func_referencing_stdin(pcap_t *p) {
   if (p->sf.rfile != (stdin))   (void)fclose(p->sf.rfile);
}

int pcap_loop(pcap_t *p, int cnt, void* callback, char *user) {   }


i reduced the testcase again to the bare minimum, it's just 2 files and 2 libc
files now with a total of about 20 lines

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