[gdb] Fix s390x -m31 build
When building gdb on s390x with -m31, we run into this Wformat
warning (which Werror turns into an error):
...
gdb/dwarf2read.c: In function \
'void create_addrmap_from_aranges(dwarf2_per_objfile*, \
dwarf2_section_info*)':
gdb/dwarf2read.c:3277:22: error: format '%zu' expects argument of type \
'size_t', but argument 3 has type 'int' [-Werror=format=]
warning (_("Section .debug_aranges in %s entry at offset %zu "
...
The Wformat warning is triggered in this statement:
...
warning (_("Section .debug_aranges in %s entry at offset %zu "
"length %s exceeds section length %s, "
"ignoring .debug_aranges."),
objfile_name (objfile), entry_addr - section->buffer,
plongest (bytes_read + entry_length),
pulongest (section->size));
...
where 'entry_addr - section->buffer' is of type ptrdiff_t and '%zu' prints an
unsigned with the same size as size_t/ssize_t.
On s390x with -m31, we have:
- size_t : unsigned long int (32-bit)
- ptrdiff_t: int (32-bit)
Wformat warns against this because even though long int and int have the same
size, the types are not compatible.
[ The Wformat warning is to similar to what we would get for x86_64 -m32
(where long and int are also the same size) and:
...
int i;
printf ("%ld", i);
... ]
Fix this by using '%s' and plongest instead of '%zu' to print ptrdiff_t.
Build and reg-tested on x86_64.
gdb/ChangeLog:
2019-06-22 Tom de Vries <tdevries@suse.de>
* dwarf2read.c (create_addrmap_from_aranges)
(read_debug_names_from_section): Print ptrdiff_t using '%s' and plongest
instead of '%zu'.
2 files changed
