Different flags for building plugins and gcc.

[IainS]

Hi Ian,

On 12 May 2010, at 21:00, Ian Lance Taylor wrote:

> IainS <developer@sandoe-acoustics.co.uk> writes:
>
>> .. this seems a bit strange : -fPIC  is not a ld flag...
>
> LDFLAGS is flags that are passed to the compiler when linking.  It is
> not flags passed directly to the linker.  I don't know why -fPIC is
> there, but it shouldn't do any harm.

it's more that it's *not* force-added to CFLAGS that was a surprise -  
since that's one thing the code says it's testing.

> The Makefile fragment config/mh-ppc-darwin is selected in
> configure.ac.  I think the simplest approach would be to select
> different config files based on whether --enable-plugins is used.


Agreed - it's the simplest .. but..

(a) that means we don't auto-detect the ability to use plugins - not a  
major bind, but a shame.

(b) if we believe that the comment in mh-ppc-darwin is up to date, we  
are sacrificing 3..5% compile performance if we build a compiler able  
to use plugins.

.. (b) also applies to the other simple approach - just nuke mh-ppc- 
darwin [which, incidentally,  restores auto-detect of plugin  
capability] ;-)

Iain