[buildroot 0001069]: buildroot mipsel with soft-float does not compile libgcc with -msoft-float

[bugs at busybox.net]

The following issue has been SUBMITTED. 
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http://busybox.net/bugs/view.php?id=1069 
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Reported By:                spblinux
Assigned To:                uClibc
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Project:                    buildroot
Issue ID:                   1069
Category:                   Architecture Specific
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     assigned
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Date Submitted:             10-10-2006 07:32 PDT
Last Modified:              10-10-2006 07:32 PDT
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Summary:                    buildroot mipsel with soft-float does not compile
libgcc with -msoft-float
Description: 
Buildroot toolchain gcc-4.1.0/uClibc-0.9.28 mipsel
Compilation of asterisk-1.2.1 (with openwrt patches):
- asterisk works if compiled with 
  buildroot toolchain without soft-float option
- asterisk runs but does not work properly if compiled with 
  buildroot toolchain  with -msoft-float

Issue: many embedded device do not have a fpu; so -msoft-float should be
used.

Solution: when gcc is compiled libgcc has to be compiled with
-msoft-float:
the buildroot patch
 toolchain/gcc/4.1.0/100-uclibc-conf.patch
has to add
 TARGET_LIBGCC2_CFLAGS= -fPIC -msoft-float
to gcc-4.1.0/gcc/config/t-linux-uclibc.

Credits go to  David Wuertele
(http://gcc.gnu.org/ml/gcc/2003-08/msg00634.html)
who found the solution.

It would be nice if BR2_SOFT_FLOAT=y would automagically add
-msoft-float.

Christian Ostheimer
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Issue History 
Date Modified   Username       Field                    Change               
====================================================================== 
10-10-06 07:32  spblinux       New Issue                                    
10-10-06 07:32  spblinux       Status                   new => assigned     
10-10-06 07:32  spblinux       Assigned To               => uClibc          
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