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fpu vs soft-fpu
- From: Jack Howarth <howarth at bromo dot msbb dot uc dot edu>
- To: libc-alpha at sources dot redhat dot com, roland at redhat dot com
- Cc: aldyh at redhat dot com
- Date: Fri, 18 Oct 2002 21:01:19 -0400 (EDT)
- Subject: fpu vs soft-fpu
Roland,
It seems that all those files have a right to be in
the math/Makefile for libm-support. However they are normally
built from the copies in sysdeps/powerpc/fpu. However I notice
that the config.make created ends up with...
config-sysdirs = sysdeps/powerpc/powerpc32/elf sysdeps/powerpc/elf linuxthreads/sysdeps/unix/sysv/linux linuxthreads/sysdeps/pthread sysdeps/pthread linuxthreads/sysdeps/unix/sysv linuxthreads/sysdeps/unix linuxthreads/sysdeps/powerpc/powerpc32 linuxthreads/sysdeps/powerpc sysdeps/unix/sysv/linux/powerpc/powerpc32 sysdeps/unix/sysv/linux/powerpc sysdeps/unix/sysv/linux sysdeps/gnu sysdeps/unix/common sysdeps/unix/mman sysdeps/unix/inet sysdeps/unix/sysv sysdeps/unix/powerpc
sysdeps/unix sysdeps/posix sysdeps/powerpc/powerpc32/fpu sysdeps/powerpc/powerpc32 sysdeps/wordsize-32 sysdeps/powerpc/soft-fp sysdeps/powerpc/fpu sysdeps/powerpc sysdeps/ieee754/flt-32 sysdeps/ieee754/dbl-64 sysdeps/ieee754 sysdeps/generic/elf sysdeps/generic
which places sysdeps/powerpc/soft-fp before sysdeps/powerpc/fpu. I am
puzzled how this is supposed to work. If you have a math/Makefile
with libm-support set to source files that exist in both
sysdeps/powerpc/soft-fp and sysdeps/powerpc/fpu...and both of those
directories exist in config.make on config-sysdirs who wins? The first
directory which contains the desired source file? It must not be building
both copies in fpu and soft-fp or else I would see symbol conflicts.
Confusing.
Jack