[Buildroot] [buildroot 0001588]: undefined reference to fmsub when using ppc405 + soft-float + c++
bugs at busybox.net
bugs at busybox.net
Thu Mar 27 19:38:14 UTC 2008
The following issue has been CLOSED
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http://busybox.net/bugs/view.php?id=1588
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Reported By: glikely
Assigned To: buildroot
======================================================================
Project: buildroot
Issue ID: 1588
Category: Architecture Specific
Reproducibility: always
Severity: crash
Priority: normal
Status: closed
Resolution: open
Fixed in Version:
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Date Submitted: 11-12-2007 20:36 PST
Last Modified: 03-27-2008 12:38 PDT
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Summary: undefined reference to fmsub when using ppc405 +
soft-float + c++
Description:
C++ seems to be brpken on ppc405 toolchains using softfloat and uClibc.
Issue seen on current buildroot top-of-tree.
I see the error on the iperf configure script. Here's the relevant error
message:
configure:1936: checking for C++ compiler default output file name
configure:1939:
/home/grant/hacking/buildroot/build_powerpc/staging_dir/usr/bin/powerpc-linux-uclibc-g++
-Os -pipe
-I/home/grant/hacking/buildroot/build_powerpc/staging_dir/usr/include
-I/home/grant/hacking/buildroot/build_powerpc/staging_dir/include
--sysroot=/home/grant/hacking/buildroot/build_powerpc/staging_dir/
-isysroot /home/grant/hacking/buildroot/build_powerpc/staging_dir
-mtune=405 -msoft-float conftest.cc >&5
/home/grant/hacking/buildroot/build_powerpc/staging_dir/usr/bin-ccache/../lib/gcc/powerpc-linux-uclibc/4.2.1/../../../../powerpc-linux-uclibc/lib/libgcc_s.so:
undefined reference to `fmsub'
collect2: ld returned 1 exit status
configure:1942: $? = 1
configure: failed program was:
| /* confdefs.h. */
|
| #define PACKAGE_NAME "Iperf"
| #define PACKAGE_TARNAME "iperf"
| #define PACKAGE_VERSION "2.0.2"
| #define PACKAGE_STRING "Iperf 2.0.2"
| #define PACKAGE_BUGREPORT ""
| #define PACKAGE "iperf"
| #define VERSION "2.0.2"
| /* end confdefs.h. */
|
| int
| main ()
| {
|
| ;
| return 0;
| }
configure:1981: error: C++ compiler cannot create executables
See `config.log' for more details.
I've attached my .config file
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----------------------------------------------------------------------
vanokuten - 11-16-07 02:53
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Do you have a fix for it?
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b5331 - 01-31-08 05:48
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I just want to confirm this problem. I have tested C++ gcc-4.2.1 compiler
with both uClibc-0.9.29 and uClibc-0.9.28.3, they both have the same
problem: undefined reference to `fmsub'. It seams that uClibc is not
compatible with the latest versions of the C++ compiler.
I am quite surprised to the fact that this issue has the normal level of
priority, when such a basic tool as the compiler can not be used.
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b5331 - 02-01-08 09:20
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Hi guys, it seams that I have a solution for this problem. I am not sure
that it is hundred percents correct , but at least it works for me.
I am using Freescale MPC8540 microchip.
The gcc/config/rs6000/darwin-ldouble.c file contents the fmsub function.
This file was not included in previous versions of gcc in the project for
this type of processors, because it mainly encloses functions irrelevant
for 32-bit processors. Having difficulty to exclude this file from the
project, I have disabled it by moving the conditional compiling directive.
After that I was able to build applications with no error message from the
linker.
The proposed '920-soft-float.patch' patch is attached. Any comments are
welcome
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jacmet - 03-27-08 12:38
----------------------------------------------------------------------
Fixed in r2152 - Thanks!
Issue History
Date Modified Username Field Change
======================================================================
11-12-07 20:36 glikely New Issue
11-12-07 20:36 glikely Status new => assigned
11-12-07 20:36 glikely Assigned To => buildroot
11-12-07 20:36 glikely File Added: .config
11-16-07 02:53 vanokuten Note Added: 0002933
01-30-08 06:17 b5331 Issue Monitored: b5331
01-30-08 06:36 b5331 Note Added: 0003604
01-30-08 06:36 b5331 Note Added: 0003609
01-30-08 06:37 b5331 Note Deleted: 0003609
01-31-08 05:48 b5331 Note Edited: 0003604
02-01-08 06:55 b5331 File Added: 920-soft-float.patch
02-01-08 06:55 b5331 Note Added: 0003634
02-01-08 07:51 b5331 Note Edited: 0003634
02-01-08 09:20 b5331 Note Edited: 0003634
03-27-08 12:38 jacmet Status assigned => closed
03-27-08 12:38 jacmet Note Added: 0006134
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