linux/arch/ppc64
Benjamin Herrenschmidt 52292c9b8c [PATCH] ppc64: fix gcc 4.0 vs CONFIG_ALTIVEC
gcc-4.0 generates altivec code implicitly when -mcpu indicates an
altivec capable CPU which is not suitable for the kernel.  However, we
used to set -mcpu=970 when CONFIG_ALTIVEC was set because a gcc-3.x bug
prevented from using -maltivec along with -mcpu=power4, thus prevented
building the RAID6 altivec code.

This patch fixes all of this by testing for the gcc version.  If 4.0 or
later, just normally use -mcpu=power4 and let the RAID6 code add
-maltivec to the few files it needs to be compiled with altivec support.
For 3.x, we still use -mcpu=970 to work around the above problem, which
is fine as 3.x will never implicitly generate altivec code.

The Makefile hackery may not be the most lovely, I welcome anybody more
skilled than me to improve it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-03 07:38:34 -07:00
..
boot [PATCH] ppc64: tell firmware about kernel capabilities 2005-05-01 08:58:45 -07:00
configs Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
kernel [PATCH] convert that currently tests _NSIG directly to use valid_signal() 2005-05-01 08:59:14 -07:00
lib Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mm [PATCH] PPC64: Remove hot busy-wait loop in __hash_page 2005-05-01 08:58:45 -07:00
oprofile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
xmon [PATCH] ppc-opc NULL noise removal 2005-04-26 07:43:41 -07:00
defconfig Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Kconfig [PATCH] ppc64: remove -fno-omit-frame-pointer 2005-04-16 15:24:37 -07:00
Kconfig.debug Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile [PATCH] ppc64: fix gcc 4.0 vs CONFIG_ALTIVEC 2005-05-03 07:38:34 -07:00