Telling plugins about build,host,target triplet strings

[Joseph S. Myers]

On Wed, 5 Sep 2012, Basile Starynkevitch wrote:

>   const char* plugin_build_triplet (void);

I think if you want to tell the plugin about the build triplet in this 
sort of way, there is some fundamental confusion involved.  A compiler 
built for a given host and target pair should behave the same independent 
of what system it was built on (what the build triplet was) - and 
similarly, such a compiler could use plugins built on different systems 
from the build system on which the compiler itself was built (whereas all 
plugins would need to be configured for the same host and target as the 
compiler).

The target triplet is proper information for a plugin to enquire about.  
The build triplet definitely is not.  The host triplet probably isn't 
either (compilers for the same target, and different hosts, should also 
behave the same) although there may be some limited use cases where your 
plugin is explicitly not following the conventions of GCC proper regarding 
host-independence.  Your use case for testing sounds like something where 
the build infrastructure for your plugin should be determining what to do 
depending on the triplets, rather than the plugin itself knowing about 
them.

-- 
Joseph S. Myers
joseph@codesourcery.com