Changes (by Roland Haas):

assignee:	Roland Haas (was Erik Schnetter)
responsible:	[] (was [])

I was trying to compile ET on MareNostrum (BSC) using the xlc/xlC/xlf compiler suite version 10.01 and failed. The first relevant error reads:

"/gpfs/home/uv08/uv08986/source/Cactus/configs/z4pisky_std/build/LoopControl/loopcontrol.c", line 1371.1: 1506-343 (S) Redeclaration of lc_statmap_init differs from previous declaration on line 631 of "/gpfs/home/uv08/uv08986/source/Cactus/configs/z4pisky_std/build/LoopControl/loopcontrol.c". "/gpfs/home/uv08/uv08986/source/Cactus/configs/z4pisky_std/build/LoopControl/loopcontrol.c", line 1371.1: 1506-376 (I) Redeclaration of lc_statmap_init has a different number of fixed parameters than the previous declaration. "/gpfs/home/uv08/uv08986/source/Cactus/configs/z4pisky_std/build/LoopControl/loopcontrol.c", line 1371.1: 1506-377 (I) The type "char" of parameter 3 differs from the previous type "const char restrict const".

The fist declaration reads:

630 void
631 lc_statmap_init (int * restrict const initialised,
632                  lc_statmap_t * restrict const lm,
633                  char const * restrict const name)
634 {

while the second is

1374 CCTK_FCALL 1375 void 1376 lc_statmap_init (int * restrict const initialised, 1377 lc_statmap_t * restrict const lm, 1378 ONE_FORTSTRING_ARG) 1379 {

From the compiler message, I guess ONE_FORTSTRING_ARG expanded to something of type char*

It seems the idea here is to provide a version of a C function callable from Fortran. However, it ends up having the same name and argument types (apart from const-ness), which is forbidden. From the Cactus manual I would guess one needs to wrap the second declaration inside a CCTK_FNAME macro, like

void CCTK_FCALL CCTK_FNAME(lc_statmap_init)(int * restrict const initialised, lc_statmap_t * restrict const lm, ONE_FORTSTRING_ARG) {

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/974/compilation-problem-in-loopcontrol-with