🚀 go-pugleaf

Scott McPeak wrote:
> 
> > > I'm working on a project in which some very long (millions of lines) C
> > > source files get generated.  Since GNU 'as' and 'gdb' cannot store more
> > > than 16 bits of line number information, debugging programs using these
> > > files is tedious.
> 
> > Have you tried using -gdwarf-2?
> 
> I had not, and that does indeed solve the problem.
> 
> In that case, I might change my RFE to request that 'as' emit a warning
> when it encodes a stabs n_desc value that does not fit in 16 bits; the
> warning might suggest -ggdb or -gdwarf-2.

Sounds like a reasonable idea -- I'll pass it on to the binutils folks.

Hi Scott,

> In that case, I might change my RFE to request that 'as' emit a
> warning when it encodes a stabs n_desc value that does not fit in
> 16 bits; the warning might suggest -ggdb or -gdwarf-2.

Please could you try out the attached patch and let me know if it
generates the warning message appropriately.

Cheers
        Nick

PS.  I was not sure if it was appropriate for the warning message to
suggest a different debug format, so I put the idea into a comment
instead.

Index: gas/stabs.c
===================================================================
RCS file: /cvs/src/src/gas/stabs.c,v
retrieving revision 1.16
diff -c -3 -p -w -r1.16 stabs.c
*** gas/stabs.c	3 May 2002 02:25:33 -0000	1.16
--- gas/stabs.c	11 May 2002 09:51:25 -0000
*************** s_stab_generic (what, stab_secname, stab
*** 240,245 ****
--- 240,252 ----
    other = longint;
  
    desc = get_absolute_expression ();
+ 
+   if (desc > 0xffff || desc < 0xffff8000)
+     /* This could happen for example with a source file with a huge
+        number of lines.  The only cure is to use a different debug
+        foramt, probably DWARF.  */
+     as_warn (_(".stab%c: description field does not fit into 16 bits"), what);
+     
    if (what == 's' || what == 'n')
      {
        if (*input_line_pointer != ',')