1.1 --- a/arch/powerpc/config.in	Tue Aug 12 09:56:19 2008 +0000
     1.2 +++ b/arch/powerpc/config.in	Wed Aug 27 16:24:24 2008 +0000
     1.3 @@ -14,4 +14,13 @@
     1.4      depends on EXPERIMENTAL
     1.5      default n
     1.6      help
     1.7 -      Add support for the Signal Processing Engine.
     1.8 +      Add support for the Signal Processing Engine.  This will set up
     1.9 +      the toolchain so that it supports the SPE ABI extensions. This
    1.10 +      mainly targets Freescale e500 processors.
    1.11 +
    1.12 +      Setting this option will append "spe" to the end of your target
    1.13 +      tuple name (e.g., powerpc-e500v2-linux-gnuspe) so that the gcc
    1.14 +      configure/build system will know to include SPE ABI support.
    1.15 +      It will also automatically add "-mabi=spe -mspe" to your
    1.16 +      TARGET_CFLAGS, and "--enable-e500_double" to your CC_EXTRA_CONFIG,
    1.17 +      so you do not need to explicitly add them.