Allow new just-symbols test to run on XCOFF and PE

[Maciej W. Rozycki]

On Mon, 27 Jul 2020, Alan Modra via Binutils wrote:

> 	* testsuite/ld-misc/just-symbols.exp: Run for x86_64 PE too.
> 	Set LDFLAGS for PE and XCOFF.
> 	* testsuite/ld-misc/just-symbols.ld: Accept XCOFF mapped .data.
> 
> diff --git a/ld/testsuite/ld-misc/just-symbols-1.dd b/ld/testsuite/ld-misc/just-symbols-1.dd
> index 8908a235ae..9502566ac9 100644
> --- a/ld/testsuite/ld-misc/just-symbols-1.dd
> +++ b/ld/testsuite/ld-misc/just-symbols-1.dd
> @@ -1,5 +1,3 @@
> -.*: +file format .*
> -
> -Contents of section \.data:
> +#...
>   [0-9a-f]+ (?:(:?12000000|00120000|00000012) 0{8}|0{8} 00000012) 0{8} 0{8} .*
>  #pass

 This breaks one purpose of the test case, that is ensuring that data from 
the input `.data' section coming from just-symbols-1.o is first in the 
output `.data' section; that is that `--just-symbols' actually works as 
intended and does not pull contents from just-symbols-0.o/just-symbols-0. 

 Sorry not to have been clear about it in the change description of commit 
97c79e2174fb ("PR ld/26288: Allow the use of `--just-symbols' with ET_EXEC 
input").

 Would you be able to update your change to keep that purpose?  What's 
there with the affected targets that causes extra data to be present 
ahead?

  Maciej