kernel: only optimized for size if small_flash

[openwrt/openwrt.git] / config / Config-kernel.in

diff --git a/config/Config-kernel.in b/config/Config-kernel.in
index d2d1909956f35b74d034e7197b9f02915a7707f3..58f7d6009442c8c41f99a6221e5f1a99765dc44b 100644 (file)
--- a/config/Config-kernel.in
+++ b/config/Config-kernel.in
@@ -806,3 +806,25 @@ config KERNEL_DEVKMEM
          Say Y here if you want to support the /dev/kmem device. The
          /dev/kmem device is rarely used, but can be used for certain
          kind of kernel debugging operations.
+
+#
+# compile optimiziation setting
+#
+choice
+       prompt "Compiler optimization level"
+       default KERNEL_CC_OPTIMIZE_FOR_SIZE if SMALL_FLASH
+
+config KERNEL_CC_OPTIMIZE_FOR_PERFORMANCE
+       bool "Optimize for performance"
+       help
+         This is the default optimization level for the kernel, building
+         with the "-O2" compiler flag for best performance and most
+         helpful compile-time warnings.
+
+config KERNEL_CC_OPTIMIZE_FOR_SIZE
+       bool "Optimize for size"
+       help
+         Enabling this option will pass "-Os" instead of "-O2" to
+         your compiler resulting in a smaller kernel.
+
+endchoice