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authorAndi Kleen <andi@firstfloor.org>2008-02-22 09:15:03 -0500
committerSam Ravnborg <sam@uranus.ravnborg.org>2008-04-25 14:23:47 -0400
commit35bb5b1e0e84cfa1a8906f7e6a77f391ff315791 (patch)
treefd3fa4e426bd11df3496141d8a251a783bce5f8d /lib
parent80ff26241623875636674a31c0540a78c0fb5433 (diff)
Add option to enable -Wframe-larger-than= on gcc 4.4
Add option to enable -Wframe-larger-than= on gcc 4.4 gcc mainline (upcoming 4.4) added a new -Wframe-larger-than=... option to warn at build time about too large stack frames. Add a config option to enable this warning, since this very useful for the kernel. I choose (somewhat arbitarily) 2048 as default warning threshold for 64bit and 1024 as default for 32bit architectures. With some research and fixing all the code for smaller values these defaults should be probably lowered. With the default allyesconfigs have some new warnings, but I think that is all code that should be just fixed. At some point (when gcc 4.4 is released and widely used) this should obsolete make checkstack Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/Kconfig.debug11
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 623ef24c2381..754cc0027f2a 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -25,6 +25,17 @@ config ENABLE_MUST_CHECK
25 suppress the "warning: ignoring return value of 'foo', declared with 25 suppress the "warning: ignoring return value of 'foo', declared with
26 attribute warn_unused_result" messages. 26 attribute warn_unused_result" messages.
27 27
28config FRAME_WARN
29 int "Warn for stack frames larger than (needs gcc 4.4)"
30 range 0 8192
31 default 1024 if !64BIT
32 default 2048 if 64BIT
33 help
34 Tell gcc to warn at build time for stack frames larger than this.
35 Setting this too low will cause a lot of warnings.
36 Setting it to 0 disables the warning.
37 Requires gcc 4.4
38
28config MAGIC_SYSRQ 39config MAGIC_SYSRQ
29 bool "Magic SysRq key" 40 bool "Magic SysRq key"
30 depends on !UML 41 depends on !UML