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How to fix assignment of 'ptr to const' to 'ptr' compile error?

typedef struct
{
SRV_Ntrfc_t const *ntrfc;
} SRV_Cnfg_t;

MGR_MR_E srv_main( MGR_MC_E cmd,
MGR_Work_t *cmw,
MGR_Cnfg_t *cmc,
MGR_Srv_t *srv ) {

Work_t *wp = srv->work;
SRV_Cnfg_t *cp = srv->cnfg;
SRV_Ntrfc_t *ntrfc = cp->ntrfc
....

Above code was compiled with WindRiver diab 4.2b 'C' compiler without errors. Compiling this program with WindRiver diab 5.8.0.0 'C' compiler produces the following error:

trying to assign 'ptr to const' to 'ptr'

How to fix this error without changing software functionality? Maybe some kind of typecast may do it.

ASKER CERTIFIED SOLUTION

JohnGaby

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Infinity08

A const_cast should really only be a last resort (when there's no other way), because it's an ugly construct. Since you have control over the source code, you don't need a const_cast.

Just add a const here :

const SRV_Ntrfc_t *ntrfc = cp->ntrfc;

or remove the const here :

typedef struct
{
SRV_Ntrfc_t *ntrfc;
} SRV_Cnfg_t;

depending on which makes more sense.