https://sourceware.org/bugzilla/show_bug.cgi?id=27229
Bug ID: 27229
Summary: Writing symbols section - example code does not work
Product: binutils
Version: 2.35.1
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: karthik.eu at outlook dot com
Target Milestone: ---
Created attachment 13149
--> https://sourceware.org/bugzilla/attachment.cgi?id=13149&action=edit
object file
I am following the example at
https://sourceware.org/binutils/docs-2.35/bfd/Writing-Symbols.html#Writing-Symbols
My code is slightly modified and I expect it to produce a pe-x86-64 COFF object
file.
```
bfd_init();
auto *abfd = bfd_openw("test.obj", "pe-x86-64");
my_assert(bfd_set_format(abfd, bfd_object));
my_assert(bfd_set_file_flags(abfd, HAS_RELOC | HAS_SYMS));
auto symbol = bfd_make_empty_symbol(abfd);
symbol->name = "my_data";
symbol->section = bfd_make_section_old_way(abfd, ".data");
symbol->flags = BSF_GLOBAL;
symbol->value = 0xab;
asymbol *symbols[] = { symbol, nullptr };
bfd_set_symtab(abfd, symbols, 1);
bfd_close(abfd);
```
Both `nm` and `objdump` from the same mingw64 environment do not recognize this
file.
> C:\msys64\mingw64\bin\nm.exe: test.obj: file format not recognized
On the other hand, `dumpbin` utility on windows can read it
> Dump of file test.obj
> File Type: COFF OBJECT
> Summary
> 0 .data
When I use `pei-x86-64` instead of `pe-x86-64`, the file utility reads my file
> test.obj: PE Unknown PE signature 0x0 (stripped to external PDB), for MS
> Windows
I tried to read the same with
```
bfd *abfd = bfd_openr(test_bin, nullptr);
bool isCorrectFormat = bfd_check_format(abfd, bfd_object);
```
and this also failed with `bfd_get_error() -> bfd_error_file_not_recognized`.
What I am doing wrong? Did I misunderstand the target names?
I am trying to generate an object file with some data in the `.data` section
and I want mingw-w64-x86_64-binutils tools to recognize this file.
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