...

here are the statements on the referenced lines:

8931: eq_destroy ( eqtb [p ]) ; 8940: eq_destroy ( eqtb [p ]) ; 9005: eq_destroy ( eqtb [p ]) ; 9124: eq_destroy ( save_stack [save_ptr ]) ; 9133: eq_destroy ( eqtb [p ]) ;

does this make sense to you? eqtb and save_stack is a structure.

It may be complaining about eq_destroy, because these five happen to be all the calls to that function. Perhaps it misinterprets the macro in luatexcoerce.h. Not that I see a reason why it should, this function is converted by web2c just like all others. Or perhaps it is mis-optimizing something?

DK> Ancient compilers did not allow for passing structures to DK> functions. It sounds somewhat unlikely that this would be the only DK> case here, though. DK> Maybe a missing prototype or something for eq_destroy? i investigated it further. after pre-processing, eq_destroy ( eqtb [p ]) ; gets changed to: zeq_destroy((memoryword) (eqtb [p ])) ; i.e. the casts are added to the argument. it appears that the compiler is not happy about the constructs with such casts, it has nothing to do with the zeq_destroy function itself. i.e. if i manually remove the casts after passing the code through a pre-processor, i.e. change it to zeq_destroy( eqtb [p ]) ; then it compiles fine. to see further, i created a small test file: =================================== typedef struct { int CINT0, CINT1; } twoints; void test (twoints *z) { twoints v1 = z[0]; twoints v2 = (twoints) (z[0]); twoints v3 = *z; twoints v4 = (twoints) (*z); } =================================== $ xlc -c test.c "test.c", line 7.17: 1506-117 (S) Operand must be a scalar type. "test.c", line 9.17: 1506-117 (S) Operand must be a scalar type. it gives errors for lines with casts and no errors for lines without casts. does that make sense to anyone? Best, v.

Vladimir Volovich wrote:

"VV" == Vladimir Volovich writes:

VV> does that make sense to anyone?

i tested this with GCC, and got these warnings with the -pedantic option:

$ gcc -c -pedantic test.c test.c: In function 'test': test.c:7: warning: ISO C forbids casting nonscalar to the same type test.c:9: warning: ISO C forbids casting nonscalar to the same type

so i guess xlc's refusal to compile is not completely groundless.

Ok, found it. Patch is forthcoming. Best wishes, Taco