Bug#941563: -l option ordering

[Junichi Uekawa <dancer@netfort.gr.jp>]

On Fri, 28 Feb 2025 20:21:48 +0900,
Junichi Uekawa wrote:
> 
> 
> 
> Seems like adding `-lreadline` after the source code would solve the problem. It seems like gcc started checking for missing symbols at shared library link time (like static libs) whereas before it didn't check.
> 
> gcc -lreadline -I /usr/include/readline  /usr/bin/realcsh.c  # fails
> gcc -I /usr/include/readline  /usr/bin/realcsh.c  -lreadline  # succeeds
> 
> 
> I think it's a gcc change but I can't find the new gcc option to make
> it not do that.
> 

The tricky part is that the examples are just a canary and in general
the binfmtc command-line construction needs to take this into
acount. I think the ordering was somewhat hardcoded, and we need to
parse it in such a way so that flags are added in a different
ordering.