Re: RFC: Support for FreeBSD/amd64

[Giorgos Keramidas <keramida@ceid.upatras.gr>]

On 2005-10-29 12:07, Eli Zaretskii <eliz@gnu.org> wrote:
>Richard M. Stallman <rms@gnu.org> wrote:
>>> Yes, and they both are almost certainly needed.  The reason is that
>>> some functions in libgcc.a call functions from libc.a, and some
>>> libc.a functions need functions from libgcc.a.  Since most versions
>>> of ld are one-pass linkers, you need to mention -lgcc twice, or else
>>> risk getting unresolved externals.
>>
>> Someone should add a comment above that line
>> to explain this.
>
> I don't object to such a comment, of course, but I thought this
> was common knowledge.  E.g., anyone who has ever invoked GCC
> with the -v option to build a C program already knows that GCC
> mentions -lgcc twice on the linker's command line.

The original suggestion for a comment was triggered from my own
comment that the duplicate -lgcc was probably intentional, but I
didn't know the reason.  Now I know the answer, but it may still
be worth to document it near the relevant part of the source ;-)

- Giorgos