On 02/10/20 15:09, Peter Maydell wrote:
> This duplicates the information that the thing that depends
> on libudev is mpath. Can we put this in a wrapper around
> dependency() so that we could just say something like
> libudev = compile_checked_dependency('libudev',
> required: get_option('mpath').enabled(),
> static: enable_static)
>
> for those dependencies that want to do the "does this compile"
> check ?
No, there's no functions at all. You can of course put the detection and
test in a single loop:
dependencies = {}
...
if targetos == 'linux' and (have_system or have_tools)
dependencies += {'libudev': 'mpath'}
endif
...
skeleton = 'int main(void) { return 0; }'
foreach var, option: dependencies
dep = dependency(var,
required: get_option(option).enabled(),
static: enable_static)
if dep.found() and enable_static and not cc.links(skeleton, dependencies:
get_variable(var))
if get_option(option).enabled()
error('Cannot link with @0@'.format(var))
else
warning('Cannot link with @0@, disabling'.format(skeleton))
set_variable(var, not_found)
endif
endif
endif
endforeach
Doing this check for all libraries is certainly a good idea.
Paolo
