* Problems with overriding FPU code from add-ons
@ 2006-03-16 20:29 Steven Munroe
0 siblings, 0 replies; only message in thread
From: Steven Munroe @ 2006-03-16 20:29 UTC (permalink / raw)
To: GNU libc hacker
Originally reported this to libc-ports, but now I am convinved this is a
general problem.
The directory search sequence does not allow add-ons to override ./fpu
code. In my case the (power4++) implementations of llrint.S and
llrintf.S from powerpc-cpu/sysdeps/powerpc/powerpc32/powerpc64/fpu/
are not overriding the implementations from
libc/sysdeps/powerpc/powerpc32/fpu.
From config.make we see:
config-sysdirs =
sysdeps/powerpc/powerpc32/elf
sysdeps/powerpc/elf
sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu <<1>>
sysdeps/powerpc/powerpc32/fpu <<2>>
nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32
sysdeps/unix/sysv/linux/powerpc/powerpc32
nptl/sysdeps/unix/sysv/linux/powerpc
sysdeps/unix/sysv/linux/powerpc
sysdeps/ieee754/ldbl-128ibm
sysdeps/ieee754/ldbl-opt
nptl/sysdeps/unix/sysv/linux
nptl/sysdeps/pthread
sysdeps/pthread
sysdeps/unix/sysv/linux
sysdeps/gnu
sysdeps/unix/common
sysdeps/unix/mman
sysdeps/unix/inet
nptl/sysdeps/unix/sysv
sysdeps/unix/sysv
sysdeps/unix/powerpc
nptl/sysdeps/unix
sysdeps/unix
sysdeps/posix
powerpc-cpu/sysdeps/powerpc/powerpc32/power4/fpu <<3>>
powerpc-cpu/sysdeps/powerpc/powerpc32/powerpc64/fpu <<4>>
powerpc-cpu/sysdeps/powerpc/powerpc32/power4
powerpc-cpu/sysdeps/powerpc/powerpc32
sysdeps/powerpc/powerpc32
sysdeps/wordsize-32
sysdeps/powerpc/fpu <<5>>
powerpc-cpu/sysdeps/powerpc
nptl/sysdeps/powerpc sysdeps/powerpc
sysdeps/ieee754/dbl-64
sysdeps/ieee754/flt-32
sysdeps/ieee754
powerpc-cpu/sysdeps/powerpc/powerpc32/powerpc64
sysdeps/generic/elf
sysdeps/generic
The <<#>> annotations are mine.
All the directories (including add-ons) in the list but the ./fpu
directorys from the libc (<<1>>, <<2>>) preceed the ./fpu directories
from ANY add-on (in my case <<3>> and <<4>>). This incorrect because
there there is no way for an add-on to override the ./libc
implementation for ./fpu directory.
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