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[Bug ld/16756] New: Incorrect warning message
From: |
hjl.tools at gmail dot com |
Subject: |
[Bug ld/16756] New: Incorrect warning message |
Date: |
Tue, 25 Mar 2014 19:27:16 +0000 |
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:
address@hidden warn-6]$ cat foo.c
void foo () { }
address@hidden warn-6]$ cat bar.c
static const char _evoke_link_warning_foo[]
__attribute__ ((used, section (".gnu.warning.foo")))
= "function foo is deprecated";
address@hidden warn-6]$ cat main.c
extern void foo ();
int
main ()
{
foo ();
return 0;
}
address@hidden 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.
address@hidden 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
address@hidden warn-6]$
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