failure to link programs when compiled with -msoft-float

["Kurt J. Lidl" <lidl%pix.net@localhost>]

I've been working on getting the mvme68k port to cross-build
from my sun4u build host.  I think the following problem is
generic to the m68k toolchain that NetBSD uses.

I've worked through various issues, and with a recent pullup of
a fix from the gcc people, the compiler no longer errors out
when compiling various bits of libc (in particular the strtod.c file)
with -msoft-float specified.

So, my build (with -msoft-float turned on) now stops when it
attempts to link the first userland binary.  (Which is either
bin/cat or gnu/usr.bin/bc, depending on whether I use -j 2,
or no -j flag at all.)  The error at the failure is the same:

#   compile  bc/util.o
/nbsd/mvme68k/tools/bin/m68k--netbsdelf-gcc -O2 -pipe  -m68040 -msoft-float   
-Werror   -D_POSIX_SOURCE -funsigned-char -I. -I/nbsd/src/gnu/usr.bin/bc 
-I/nbsd/src/gnu/dist/bc/bc -I/nbsd/src/gnu/dist/bc/h -nostdinc -isystem 
/nbsd/mvme68k/nbuild/usr/include   -c    /nbsd/src/gnu/dist/bc/bc/util.c
#      link  bc/bc
/nbsd/mvme68k/tools/bin/m68k--netbsdelf-gcc -Wl,-nostdlib        -o bc  
-Wl,-rpath-link,/nbsd/mvme68k/nbuild/lib:/nbsd/mvme68k/nbuild/usr/lib  
-L/nbsd/mvme68k/nbuild/lib  -B/nbsd/mvme68k/nbuild/usr/lib/ 
-B/nbsd/mvme68k/nbuild/usr/lib/   bc.o execute.o global.o load.o main.o 
number.o scan.o storage.o util.o -ll -ledit -ltermcap       
-L/nbsd/mvme68k/nbuild/usr/lib -L/nbsd/mvme68k/nbuild/usr/lib
/nbsd/mvme68k/nbuild/lib/libc.so: undefined reference to `__eqdf2'
/nbsd/mvme68k/nbuild/lib/libc.so: undefined reference to `__fixsfsi'
/nbsd/mvme68k/nbuild/lib/libc.so: undefined reference to `__gtdf2'
/nbsd/mvme68k/nbuild/lib/libc.so: undefined reference to `__ltdf2'
/nbsd/mvme68k/nbuild/lib/libc.so: undefined reference to `__lesf2'
/nbsd/mvme68k/nbuild/lib/libc.so: undefined reference to `__mulxf3'
/nbsd/mvme68k/nbuild/lib/libc.so: undefined reference to `__gtsf2'
/nbsd/mvme68k/nbuild/lib/libc.so: undefined reference to `__ledf2'
/nbsd/mvme68k/nbuild/lib/libc.so: undefined reference to `__floatsisf'
/nbsd/mvme68k/nbuild/lib/libc.so: undefined reference to `__ltsf2'
/nbsd/mvme68k/nbuild/lib/libc.so: undefined reference to `__nedf2'
/nbsd/mvme68k/nbuild/lib/libc.so: undefined reference to `__gesf2'
/nbsd/mvme68k/nbuild/lib/libc.so: undefined reference to `__gedf2'
collect2: ld returned 1 exit status

*** Failed target:  bc
*** Failed command: /nbsd/mvme68k/tools/bin/m68k--netbsdelf-gcc -Wl,-nostdlib 
-o bc -Wl,-rpath-link,/nbsd/mvme68k/nbuild/lib:/nbsd/mvme68k/nbuild/usr/lib 
-L/nbsd/mvme68k/nbuild/lib -B/nbsd/mvme68k/nbuild/usr/lib/ 
-B/nbsd/mvme68k/nbuild/usr/lib/ bc.o execute.o global.o load.o main.o number.o 
scan.o storage.o util.o -ll -ledit -ltermcap -L/nbsd/mvme68k/nbuild/usr/lib 
-L/nbsd/mvme68k/nbuild/usr/lib
*** Error code 1

Stop.
nbmake: stopped in /nbsd/src/gnu/usr.bin/bc

I found the following interesting looking patch in the gcc archives,
which looks like it addresses this exact problem.  Comments?

http://gcc.gnu.org/ml/gcc-patches/2007-07/msg02078.html

-Kurt