[3.4 patch] Fix PR16314, undefined reference to `__subdf3' for arm-softfloat

[Dan Kegel <dank at kegel dot com>]

This fixes a problem in all 3.4 gcc's up to and including gcc-3.4.2-20040829
Could the arm maintainer have a look, and possibly apply (if possible, before 3.4.2)?
I'm not qualified to say whether it's correct, but I will say it gets
rid of the problem for my toolchain builds, and doesn't prevent plain old
arm toolchains from building.  I use it in http://kegel.com/crosstool
Thanks!
- Dan

# Origin: from a patch by Dimitry Andric <dimitry@andric.com>, 2004-05-01
# See http://gcc.gnu.org/PR16314
# Fixes errors like the following when building glibc (or any other executable
# or shared library) when using gcc 3.4.0 for ARM with softfloat:
#
# .../libc_pic.os(.text+0x15834): In function `__modf': undefined reference to `__subdf3'
# .../libc_pic.os(.text+0x158b8): In function `__modf': undefined reference to `__subdf3'
# .../libc_pic.os(.text+0x1590c): In function `scalbn': undefined reference to `__muldf3'
# .../libc_pic.os(.text+0x15e94): In function `__ldexpf': undefined reference to `__eqsf2'
# .../libc_pic.os(.text+0xcee4c): In function `monstartup': undefined reference to `__fixsfsi'

diff -urNd gcc-3.4.0-orig/gcc/config/arm/t-linux gcc-3.4.0/gcc/config/arm/t-linux
--- gcc-3.4.0-orig/gcc/config/arm/t-linux	2003-09-20 23:09:07.000000000 +0200
+++ gcc-3.4.0/gcc/config/arm/t-linux	2004-05-01 20:31:59.102846400 +0200
@@ -4,7 +4,10 @@
 LIBGCC2_DEBUG_CFLAGS = -g0

 LIB1ASMSRC = arm/lib1funcs.asm
-LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx
+LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx \
+	_negdf2 _addsubdf3 _muldivdf3 _cmpdf2 _unorddf2 _fixdfsi _fixunsdfsi \
+	_truncdfsf2 _negsf2 _addsubsf3 _muldivsf3 _cmpsf2 _unordsf2 \
+	_fixsfsi _fixunssfsi

 # MULTILIB_OPTIONS = mhard-float/msoft-float
 # MULTILIB_DIRNAMES = hard-float soft-float

--
My technical stuff: http://kegel.com
My politics: see http://www.misleader.org for examples of why I'm for regime change