https://sourceware.org/bugzilla/show_bug.cgi?id=16746
Bug ID: 16746
Summary: ld complains about .gnu.warning symbols referenced by
linker plugin inputs
Product: binutils
Version: 2.24
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: rguenth at gcc dot gnu.org
t.c
---
extern void foobar (void);
int
main (int argc, char **argv)
{
if (__builtin_constant_p (argc))
foobar ();
return 0;
}
t2.c
---
static const char __evoke_link_warning_foobar[]
__attribute__ ((used, section (".gnu.warning.foobar\n\t#")))
= "foobar";
> gcc -c t2.c
> gcc t.c t2.o -O -flto
/tmp/cctYGzQc.o (symbol from plugin): warning: foobar
the symbol table from the t.o input claimed by lto-plugin contains
a reference to foobar () - which is the point LD already warns - but
the replacement object fed from lto-plugin to the linker doesn't contain
this reference anymore.
Thus, LD shouldn't complain about references in files claimed by a
linker plugin but only about references in files provided by the
linker plugin.
This works correctly with gold.
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