https://sourceware.org/bugzilla/show_bug.cgi?id=16756
Bug ID: 16756
Summary: Incorrect warning message
Product: binutils
Version: 2.25 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: hjl.tools at gmail dot com
This testcase is derived from PR 12760 since we only see the warning
section after the LTO IR symbols have been loaded. Since we don't
keep the undefined reference when seeing a definition, we lose the
reference info:
[hjl@gnu-6 warn-6]$ cat foo.c
void foo () { }
[hjl@gnu-6 warn-6]$ cat bar.c
static const char _evoke_link_warning_foo[]
__attribute__ ((used, section (".gnu.warning.foo")))
= "function foo is deprecated";
[hjl@gnu-6 warn-6]$ cat main.c
extern void foo ();
int
main ()
{
foo ();
return 0;
}
[hjl@gnu-6 warn-6]$ make
gcc -B./ -O2 -g -c -o main.o main.c
gcc -B./ -O2 -g -c -o foo.o foo.c
gcc -B./ -O2 -g -c -o bar.o bar.c
gcc -B./ -nostdlib -Wl,-e,main -o x main.o foo.o bar.o
foo.o: warning: function foo is deprecated
^^^ It should be main.c, not foo.o.
[hjl@gnu-6 warn-6]$ gcc -B./ -nostdlib -Wl,-e,main -o x main.o bar.o foo.o
main.o: In function `main':
/export/home/hjl/bugs/binutils/warn-6/main.c:5: warning: function foo is
deprecated
[hjl@gnu-6 warn-6]$
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