RFR: JDK-8077419: Launcher mapfile fails linking with SS12u4

[Magnus Ihse Bursie]

On 2015-04-14 12:36, David Holmes wrote:
> On 14/04/2015 8:12 PM, Erik Joelsson wrote:
>> The best information that I could find about this is in the Solaris
>> documentation found here:
>> https://docs.oracle.com/cd/E26505_01/pdf/E26506.pdf
>>
>> Under the heading "Localizing Symbol Instances" there is an example
>> mapfile including __Argv, __environ_lock, _environ and _lib_version. The
>> text notes that symbol definitions established by your "compiler driver"
>> need to be kept global. I believe this is what is happening here.
>
> Thanks Erik. From a quick read I don't really understand what is 
> happening here, but I suspect we're doing something "not quite right" 
> somewhere that causes this. It seems really ugly to have to define 
> these in a map file. I wonder if our compiler experts can shed some 
> light on why we need to do this and how to avoid it?
>
> But for expediency that shouldn't hold up getting this fix in place.

I agree with you 100%. This fix is enough for the time being, but it 
smells funny. On the other hand, the PDF Erik links to seems to indicate 
that this is indeed what needs to be done when having a map file, so it 
might be correct (and just sunstudio that has a smelly design). I too 
would like to get some input from sunstudio compiler experts, though.

/Magnus