In the case of structs or unions, an error is now produced. This addresses one of the problems mentioned in issue #53.
In the case of arrays, tentative definitions like "int i[];" are now permitted at file scope. If not completed by a subsequent definition, this winds up producing an array with one element, initialized to 0. See the discussion and example in C99/C11 section 6.9.2 (or C90 section 6.7.2 and example in TC1).
Memory for them is still allocated from the global pool, to ensure they remain available for as long as the function prototype that references them.
This addresses one of the problems mentioned in issue #53.
Previously, when a struct type first appeared in a symbol table nested within another struct type, subsequent references to that type would use the wrong offset and be corrupted. This occurred because the symbol table length had not yet been updated to reflect the size of the entry for the outer structure at the time the inner one was processed.
Fixes#54.
Global structs and unions with the const qualifier were not being generated in object files. This occurred because they were represented as having "defined types" and the code was not handling those types properly.
The following example demonstrated this problem:
const struct x { int i; } X = {9};
int main(void) {
return X.i;
}
This fixes a problem with ORCA/C conformance test C5.6.0.1.CC, which was introduced by commit bf9fa66. A slightly more involved fix was needed to preserve the correct behavior while avoiding the memory trashing fixed by that patch.
