s390: allow to set gcc -mtune flag
authorHeiko Carstens <heiko.carstens@de.ibm.com>
Wed, 30 Oct 2013 11:12:50 +0000 (12:12 +0100)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Thu, 31 Oct 2013 08:54:01 +0000 (09:54 +0100)
commit1db9e0513d7478f6c80ca0bc4f58f53fe49e27f8
tree511995f3ff6a9577b8a93a6eb2192febe8a8f353
parentb226635ab82f5f5374dd6ccc9d257b41bcc41599
s390: allow to set gcc -mtune flag

Add a new Kconfig choice group which allows to configure how gcc should
tune the generated code (via -mtune option).
By default the -mtune parameter will match the -march parameter.

This is a rather large patch, but I wouldn't know how to make this shorter
unfortunately.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
arch/s390/Kconfig
arch/s390/Makefile