Command Line Order + Linker Errors

[dsimcha]

The mesasges are below.  The exact messages are probably not 
useful but I included them since you asked.  I meant to specify, 
though, that they're all "undefined reference" messages.

Actually, none of these issues occur at all when compilation of 
the two files is done separately, regardless of what order the 
object files are passed to DMD for linking:

dmd -c -unittest test.d
dmd -c -unittest emptymain.d
dmd -unittest test.o emptymain.o  # Works
dmd -unittest emptymain.o test.o  # Works

emptymain.o:(.data._D68TypeInfo_S6object26__T16AssociativeArrayTdTdZ16AssociativeArray4Slot6__initZ+0x80): 
undefined reference to 
`_D11gctemplates77__T11RTInfoImpl2TS6object26__T16AssociativeArrayTdTdZ16AssociativeArray4SlotZ11RTInfoImpl2yG2m'
emptymain.o:(.data._D73TypeInfo_S6object26__T16AssociativeArrayTdTdZ16AssociativeArray9Hashtable6__initZ+0x80): 
undefined reference to 
`_D11gctemplates82__T11RTInfoImpl2TS6object26__T16AssociativeArrayTdTdZ16AssociativeArray9HashtableZ11RTInfoImpl2yG2m'
emptymain.o:(.data._D69TypeInfo_S6object26__T16AssociativeArrayTdTdZ16AssociativeArray5Range6__initZ+0x80): 
undefined reference to 
`_D11gctemplates78__T11RTInfoImpl2TS6object26__T16AssociativeArrayTdTdZ16AssociativeArray5RangeZ11RTInfoImpl2yG2m'
emptymain.o:(.data._D149TypeInfo_S6object26__T16AssociativeArrayTdTdZ16AssociativeArray5byKeyMFNdZS6object26__T16AssociativeArrayTdTdZ16AssociativeArray5byKeyM6Result6Result6__initZ+0x80): 
undefined reference to 
`_D11gctemplates86__T11RTInfoImpl2TS6object26__T16AssociativeArrayTdTdZ16AssociativeArray5byKeyM6ResultZ11RTInfoImpl2yG2m'
emptymain.o:(.data._D153TypeInfo_S6object26__T16AssociativeArrayTdTdZ16AssociativeArray7byValueMFNdZS6object26__T16AssociativeArrayTdTdZ16AssociativeArray7byValueM6Result6Result6__initZ+0x80): 
undefined reference to 
`_D11gctemplates88__T11RTInfoImpl2TS6object26__T16AssociativeArrayTdTdZ16AssociativeArray7byValueM6ResultZ11RTInfoImpl2yG2m'
emptymain.o: In function 
`_D11gctemplates66__T6bitmapTS6object26__T16AssociativeArrayTdTdZ16AssociativeArrayZ6bitmapFZG2m':
test.d:(.text._D11gctemplates66__T6bitmapTS6object26__T16AssociativeArrayTdTdZ16AssociativeArrayZ6bitmapFZG2m+0x1b): 
undefined reference to 
`_D11gctemplates71__T10bitmapImplTS6object26__T16AssociativeArrayTdTdZ16AssociativeArrayZ10bitmapImplFPmZv'

On Monday, 29 October 2012 at 21:08:52 UTC, David Nadlinger wrote:
> On Monday, 29 October 2012 at 20:56:02 UTC, dsimcha wrote:
>> My real question, though, is why should the order of these 
>> files on the command line matter and does this suggest a 
>> compiler or linker bug?
>
> What exactly are the errors you are getting? My first guess 
> would be templates (maybe the precise GC RTInfo ones?) – 
> determining which template instances to emit into what object 
> files is non-trivial, and DMD is currently known to contain a 
> few related bugs. The fact that the problem also appears when 
> compiling all source files at once is somewhat special, though.
>
> David