[Issue 7319] .bss section not used

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=7319

Mathias LANG <pro.mathias.lang at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pro.mathias.lang at gmail.com

--- Comment #5 from Mathias LANG <pro.mathias.lang at gmail.com> ---
Just tested on Mac OSX. Modified to use `core.stdc.stdio : printf` and `alias
TypeTuple(T...) = T;` to remove Phobos imports.

The test case now returns false for everything (the pointer is null, but not
the length). The binary is still huge (8.1 Mbs), even with LDC (5.5Mb).

```
% objdump -section-headers foo

foo:    file format Mach-O 64-bit x86-64

Sections:
Idx Name          Size     VMA          Type
  0 __text        00179940 00000001000011f0 TEXT
  1 __stubs       00003f54 000000010017ab30 TEXT
  2 __stub_helper 00000984 000000010017ea84 TEXT
  3 __cstring     0000fb63 000000010017f410 DATA
  4 __const       0003f632 000000010018ef80 DATA
  5 __gcc_except_tab 0000240c 00000001001ce5b4 DATA
  6 __ustring     00000334 00000001001d09c0 DATA
  7 __unwind_info 00007084 00000001001d0cf4 DATA
  8 __eh_frame    0006b278 00000001001d7d78 DATA
  9 __got         00001c00 0000000100243000 DATA
 10 __mod_init_func 00000020 0000000100244c00 DATA
 11 __mod_term_func 00000008 0000000100244c20 DATA
 12 __const       0000baa8 0000000100244c30 DATA
 13 __la_symbol_ptr 00005470 0000000100251000 DATA
 14 __data        00035668 0000000100256480 DATA
 15 .minfo        00000508 000000010028bae8 DATA
 16 __thread_vars 00000468 000000010028bff0 DATA
 17 __thread_ptrs 00000048 000000010028c458 DATA
 18 __thread_data 00001441 000000010028c4a0 DATA
 19 __thread_bss  00000360 000000010028d8f0 DATA
 20 __common      00000920 000000010028dc50 BSS
 21 __bss         00000001 000000010028e570 BSS
```

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