Curious warning from linker re libc5/libc6

["Oliver Elphick" <olly@lfix.co.uk>]

I am running a libc5 compile with gcc under the control of a commercial
Eiffel compiler.

The PATH used has /usr/i486-linuxlibc1/bin prepended.

I get this message from the final link stage:

  gcc -o app -O   -DWORKBENCH -I/usr1/Eiffel4/bench/spec/linux/include
  -I/usr1/Eiffel4/library/mel/Clib  F1/Fobj1.o D1/Dobj1.o C1/Cobj1.o
   E1/Eobj1.o E1/emain.o \
        /usr1/Eiffel4/precomp/spec/linux/mel/EIFGEN/W_code/preobj.o \
        /usr1/Eiffel4/precomp/spec/linux/base/EIFGEN/W_code/preobj.o \
        /usr1/Eiffel4/precomp/spec/linux/vision/EIFGEN/W_code/preobj.o \
        /usr1/Eiffel4/library/mel/spec/linux/lib/libMel.a
  /usr1/Eiffel4/library/mel/spec/linux/lib/libXpm.a /usr/lib/libXm.a -lXt 
-lX11   /usr1/Eiffel4/bench/spec/linux/lib/libwkbench.a -L/usr/X11R6/lib -lbsd 
-lm
  ld: warning: libc.so.6, needed by /usr/X11R6/lib/libXt.so, may conflict with 
   libc.so.5

However, applying ldd to the final executable, I get:

 # ldd ./EIFGEN/W_code/app
   libXt.so.6 => /usr/lib/libc5-compat/libXt.so.6 (0x4000d000)
   libX11.so.6 => /usr/lib/libc5-compat/libX11.so.6 (0x4004f000)
   libm.so.5 => /lib/libm.so.5 (0x400ed000)
   libc.so.5 => /lib/libc.so.5 (0x400f6000)
   libSM.so.6 => /usr/lib/libc5-compat/libSM.so.6 (0x401b4000)
   libICE.so.6 => /usr/lib/libc5-compat/libICE.so.6 (0x401bd000)

which shows no reference to libc6.

Is this a genuine warning? or is it a bug in some package?

(Although ldd shows that none of the linked libraries are from /usr/X11R6/lib,
if I remove that directory from the library search path, I get a message
saying that it cannot find -lXt.)

-- 
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight                              http://www.lfix.co.uk/oliver

PGP key from public servers; key ID 32B8FAA1



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