[neutron-mc] making shared object from mcstas-r.c, under WinXP

[Emmanuel Farhi]

Hello Timur,

you have to compile mcstas-r.c with its mcstas-r.h header file, where the undefined symbols are defined as
'extern'. Indeed thier value is to be set in the instrument itself, not in the run-time library.
If the problem persists, send us the full error output so that we see what undefined symbols should be added
as 'extern'.

Emmanuel.

Timur Elzhov wrote:

> Dear McStas experts,
>
> I successfully compiled shared object libmcstas-r.so from mcstas-r.c
> file, so now I'm able to compile instruments with --no-runtime option,
> and link it with that library. That is all under _Linux_. But, when
> I try to do the same under WindowsXP, I get linking error (MinGW compiler
> was used):
>   mcstas> gcc -Wno-unused -fPIC -O2 -c mcstas-r.c
>   mcstas> gcc --shared -o libmcstas-r.dll mcstas-r.o
>   C:\WINDOWS\TEMP/ccwVaaaa.o(.text+0x498d):mcstas-r.c: undefined reference to `mcinstrument_source'
>   C:\WINDOWS\TEMP/ccwVaaaa.o(.text+0x4992):mcstas-r.c: undefined reference to `mcinstrument_name'
>   C:\WINDOWS\TEMP/ccwVaaaa.o(.text+0x49a1):mcstas-r.c: undefined reference to `mcinputtable'
>   C:\WINDOWS\TEMP/ccwVaaaa.o(.text+0x49ba):mcstas-r.c: undefined reference to `mcinputtable'
>   C:\WINDOWS\TEMP/ccwVaaaa.o(.text+0x49d0):mcstas-r.c: undefined reference to `mcinputtable'
>   C:\WINDOWS\TEMP/ccwVaaaa.o(.text+0x49d9):mcstas-r.c: undefined reference to `mcinputtable'
>   C:\WINDOWS\TEMP/ccwVaaaa.o(.text+0x49ea):mcstas-r.c: undefined reference to `mcinputtable'
>   C:\WINDOWS\TEMP/ccwVaaaa.o(.text+0x4a91):mcstas-r.c: more undefined references to `mcinputtable' follow
>   C:\WINDOWS\TEMP/ccwVaaaa.o(.text+0x4bea):mcstas-r.c: undefined reference to `mcnx'
>   ...
>
> and so on, about 90 lines. Why?
>
> Tnanks a lot,
> Timur.
>
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> neutron-mc at risoe.dk
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--
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Emmanuel FARHI, http://www.ill.fr/Computing/people/Farhi  \|/ ____ \|/
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