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authorLinus Torvalds <torvalds@g5.osdl.org>2005-12-14 18:52:21 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-12-14 18:52:21 -0800
commitc45b4f1f1e149c023762ac4be166ead1818cefef (patch)
tree21567145e12d3bcdba586b864dca74699830d621
parent11c18b5cb31d15a782fb727adad51ae1434e5dee (diff)
Move size optimization option outside of EMBEDDED menu, mark it EXPERIMENTAL
Also, disable on sparc64 - a number of people report breakage. Probably a compiler bug, but it's quite possible that it tickles some latent kernel problem too. It still defaults to 'y' everywhere else (when enabled through EXPERIMENTAL), and Dave Jones points out that Fedora (and RHEL4) has been building with size optimizations for a long time on x86, x86-64, ia64, s390, s390x, ppc32 and ppc64. So it is really only moderately experimental, but the sparc64 breakage certainly shows that it can trigger "issues". Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--init/Kconfig26
1 files changed, 14 insertions, 12 deletions
diff --git a/init/Kconfig b/init/Kconfig
index be74adb389e..6c5dbedc6e9 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -256,6 +256,20 @@ config CPUSETS
source "usr/Kconfig"
+config CC_OPTIMIZE_FOR_SIZE
+ bool "Optimize for size (Look out for broken compilers!)"
+ default y
+ depends on ARM || H8300 || EXPERIMENTAL
+ depends on !SPARC64
+ help
+ Enabling this option will pass "-Os" instead of "-O2" to gcc
+ resulting in a smaller kernel.
+
+ WARNING: some versions of gcc may generate incorrect code with this
+ option. If problems are observed, a gcc upgrade may be needed.
+
+ If unsure, say N.
+
menuconfig EMBEDDED
bool "Configure standard kernel features (for small systems)"
help
@@ -338,18 +352,6 @@ config EPOLL
Disabling this option will cause the kernel to be built without
support for epoll family of system calls.
-config CC_OPTIMIZE_FOR_SIZE
- bool "Optimize for size"
- default y if ARM || H8300
- help
- Enabling this option will pass "-Os" instead of "-O2" to gcc
- resulting in a smaller kernel.
-
- WARNING: some versions of gcc may generate incorrect code with this
- option. If problems are observed, a gcc upgrade may be needed.
-
- If unsure, say N.
-
config SHMEM
bool "Use full shmem filesystem" if EMBEDDED
default y