diff options
| -rw-r--r-- | Makefile | 4 | ||||
| -rw-r--r-- | lib/Kconfig.debug | 11 |
2 files changed, 15 insertions, 0 deletions
@@ -507,6 +507,10 @@ else KBUILD_CFLAGS += -O2 endif +ifneq (CONFIG_FRAME_WARN,0) +KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) +endif + # Force gcc to behave correct even for buggy distributions # Arch Makefiles may override this setting KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 623ef24c238..754cc0027f2 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -25,6 +25,17 @@ config ENABLE_MUST_CHECK suppress the "warning: ignoring return value of 'foo', declared with attribute warn_unused_result" messages. +config FRAME_WARN + int "Warn for stack frames larger than (needs gcc 4.4)" + range 0 8192 + default 1024 if !64BIT + default 2048 if 64BIT + help + Tell gcc to warn at build time for stack frames larger than this. + Setting this too low will cause a lot of warnings. + Setting it to 0 disables the warning. + Requires gcc 4.4 + config MAGIC_SYSRQ bool "Magic SysRq key" depends on !UML |