On 2014-09-04, at 12:28 PM, Christian Kandeler <[email protected]>
wrote:
> Hi,
>
> On 09/04/2014 05:33 PM, olivier musse wrote:
>> With QBS 1.3 we are trying to defined a post build process on our
>> product (a dynamiclibrary) to call install_name_tool in order to change
>> some library dependencies.
>> For that we defined the following rule (MyLib is defined as a type of
>> the product)
>> Rule{
>>
>> inputs: ['dynamiclibrary']
>>
>> Artifact {
>>
>> filePath: input.filePath
>>
>> fileTags: "MyLib"}
>>
>> prepare: {
>>
>> ......
>>
>> }
>>
>> }
>>
>>
>> When doing that, we get a conflict rule message with the internal qbs
>> file (GenericGCC.qbs:113:18)
>> Apparently this is because our rule as the same file as input and output.
>
> in general, the question of how to "enrich" a build artifact is an
> unsolved problem. I think https://bugreports.qt-project.org/browse/QBS-5
> is referring to this issue as well.
> But for your case, why not just use cpp.installNamePrefix?
>
>> With previous version of QBS it was possible to do it.
>
> I don't think so. Can you give an example project where you do that
> which works with qbs 1.2 but not wit 1.3?
>
>
> Christian
> _______________________________________________
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Any solution that uses install_name_tool is, 99% of the time, a broken solution
(the only valid case I can think of is where a binary-only third party library
you're using has a wrong install name). Certainly for your own code, you should
be using the linker flags -install_name and -rpath, which are accessible in qbs
using the cpp.installNamePrefix and cpp.rpaths properties.
Almost all of the time, cpp.installNamePrefix should be set to "@rpath", and
cpp.rpaths should generally be @executable_path/../Frameworks or
@loader_path/../Frameworks depending on where a given binary's dependencies
reside (note that rpaths is a LIST, so you can have multiple search paths).
Also see Apple's documentation on dyld:
https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man1/dyld.1.html
(relevant parts at the bottom).
Hope that helps.
--
Jake Petroules - jake.petroules at petroules.com
Chief Technology Officer - Petroules Corporation
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