On Wed, Jun 14, 2017 at 10:25:59PM +0100, Dibyendu Majumdar wrote:
> Hi,
>
> I am trying to understand what happens when multiple input files are
> given to sparse. Are the symbols from previous files dropped when
> sparse moves on to the next file?
>
> I see a call to remove_symbol_scope() in end_scope() implying that
> symbols are dropped - but then I am not sure I am understanding this
> correctly.
I never yet looked what's happening exactly but I also had seen
a problem when using multiple files, at least a difference
between sparse & gcc. The difference can quickly be seen
with an input file like:
int a = 1;
int foo(void) {}
and then call sparse or gcc with twice the same file, like
'sparse $file.c $file.c' or 'gcc -c $file.c $file.c'.
gcc seems to process the files independently and it will simply
overwrite the first $file.o when processing the second one and
this without giving a warning about 'a' or 'foo()' being redefined.
sparse seems to process the files more as if being concatenated
(even if the file scope is respected) or like it would use
a "super-scope" above the file scope of the input files and
will complain that 'a' and 'foo()' are redefined.
Is it something like this you're seeing with multiple input files?
-- Luc Van Oostenryck
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