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[Bug target/65779] New: undefined local symbol on powerpc
- From: "joel at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 15 Apr 2015 21:45:03 +0000
- Subject: [Bug target/65779] New: undefined local symbol on powerpc
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65779
Bug ID: 65779
Summary: undefined local symbol on powerpc
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: joel at gcc dot gnu.org
Created attachment 35323
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35323&action=edit
Preprocessed source from zlib.c from RTEMS PowerPC bootloader
This file compiled without an undefined symbol with many gcc versions prior to
5.x.
powerpc-rtems4.11-gcc (GCC) 5.0.0 20150412 (experimental)
Fails: powerpc-rtems4.11-gcc -mrelocatable -mcpu=603e -O2 -g zlib_pp.c
Passes: powerpc-rtems4.11-gcc -mcpu=603e -O2 -g zlib_pp.c
Fails: powerpc-rtems4.11-gcc -mrelocatable -O2 -g zlib_pp.c
Also passes at -Os, -O0, and -O1.
The error is that the assembly language produced has a .4byte directive with a
reference to a symbol that is not generated.
$ grep LCL2 zlib_pp.s
.LCL22:
lwz 0,.LCL22-.LCF22(30)
.LCL23:
lwz 0,.LCL23-.LCF23(30)
.LCL24:
lwz 0,.LCL24-.LCF24(30)
.LCL25:
lwz 0,.LCL25-.LCF25(30)
.4byte .LCL2
.4byte .LCL2