Bugs item #3544467, was opened at 2012-07-15 17:08
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Category: CIL core (parser, visitor, etc)
Group: Bug
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Cody Schuffelen ()
Assigned to: Nobody/Anonymous (nobody)
Summary: Disparity between CIL and GCC in struct/union merging
Initial Comment:
In the attached two files (file1.c and file2.c, combined into one file),
"struct myStruct" is defined two different ways, each holding a slightly
different anonymous union:
//file1.c
union {
long long int i;
int* p;
char c;
};
//file2.c
union {
long long int i;
double f;
};
Using gcc and ar, I can compile these two files together into a single object
file without errors.
gcc -c file1.c
gcc -c file2.c
ar cruv out.a file1.o file2.o
However, using cilly and attempting to merge these two with the following
commands:
cilly --merge -c file1.c
cilly --merge -c file2.c
cilly --merge --mode=AR cruv out.a file1.o file2.o
I get the following error from CIL:
:-1: Error: Incompatible declaration for build (from file2.o(1)).
Previous was at file1.c:13 (from file1.o (0))
Failed assumption that struct myStruct and struct myStruct are
isomorphic (different number of fields in __anonunion____missing_field_name_24
and __anonunion____missing_field_name_24: 3 != 2.)
struct myStruct {
int a ;
union __anonunion____missing_field_name_24 __annonCompField1 ;
};
struct myStruct {
int a ;
union __anonunion____missing_field_name_24 __annonCompField1 ;
};
Final merging phase (0): file1.o
Final merging phase (1): file2.o
file2.c:12: Warning: The name build is used for two distinct globals
Error: There were errors during merging
This is a trivial example of the error I'm getting in a larger project that I
am trying to merge together. I am using CIL 1.5.1, downloaded earlier today
from SourceForge.
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