Re: Free AMD Core Math Library (BLAS/LAPACK) + Ada

[Georg Bauhaus <rm.dash-bauhaus@futureapps.de>]

On 15.07.12 16:59, Georg Bauhaus wrote:
> On 15.07.12 15:22, Ada novice wrote:
>>> >    -largs -Wl,-v
>>> >
>>> >(*exactly*  as typed!)
>> OK. With SPACE after "WI," I get with gnatmake *.adb -largs -WI, -v -lblas:
>
> Did to put a space there on purpose? Also, that's an 'l', ell,
> after 'W'.  In the GCC man page,
>
> -Wl,option
>
> is listed among Linker Options. {option} needs to be separated
> from the 'l', but also needs to be connected to 'Wl', not counted
> among other options for gcc, not the linker. So some separator is needed,
> which is the reason for the ',', I think.

This was unclear. Let me try again.

gcc has options such as -Wall or -Wextra, where 'W'
is followed by characters, syntactically.
'l' is a character. Thus, -Wl looks like a gcc switch.

For any letter 'X', -X is a gcc switch, syntactically.
For it to be a linker option, it needs to be different.
Or placed in a location where switches are considered
not to be for gcc. (For illustration, the latter technique
is used by the GNAT front end. You'd use -largs or -bargs
to indicate locations for gnatlink switches and gnatbind
switches.)

So, -Wl,-v (without space) keeps gcc from considering -v
a switch for gcc.