kbuild: Added CONFIG_DEBUG_INFO

When CONFIG_DEBUG_INFO is set to Y, -g will be added to CFLAGS.
Several architectures already put -g in CFLAGS, often via a patch
to the top-level makefile.
This option is put in the kernel hacking menu, guarded by CONFIG_DEBUG_KERNEL.

Added CONFIG_DEBUG_INFO in Kconfig for the architectures that
already had CONFIG_DEBUG_KERNEL

Makefile

@@ -308,6 +308,10 @@ ifndef CONFIG_FRAME_POINTER
 CFLAGS		+= -fomit-frame-pointer
 endif
 
+ifdef CONFIG_DEBUG_INFO
+CFLAGS		+= -g
+endif
+
 #
 # INSTALL_PATH specifies where to place the updated kernel and system map
 # images.  Uncomment if you want to place them anywhere other than root.

arch/alpha/Kconfig

@@ -870,6 +870,15 @@ config DEBUG_SEMAPHORE
 	  verbose debugging messages.  If you suspect a semaphore problem or a
 	  kernel hacker asks for this option then say Y.  Otherwise say N.
 
+config DEBUG_INFO
+	bool "Compile the kernel with debug info"
+	depends on DEBUG_KERNEL
+	help
+          If you say Y here the resulting kernel image will include
+	  debugging info resulting in a larger kernel image.
+	  Say Y here only if you plan to use gdb to debug the kernel.
+	  If you don't debug the kernel, you can say N.
+
 endmenu
 
 source "security/Kconfig"

arch/arm/Kconfig

@@ -1082,6 +1082,15 @@ config KALLSYMS
 	  symbolic stack backtraces. This increases the size of the kernel
 	  somewhat, as all symbols have to be loaded into the kernel image.
 
+config DEBUG_INFO
+	bool "Compile the kernel with debug info"
+	depends on DEBUG_KERNEL
+	help
+          If you say Y here the resulting kernel image will include
+	  debugging info resulting in a larger kernel image.
+	  Say Y here only if you plan to use gdb to debug the kernel.
+	  If you don't debug the kernel, you can say N.
+
 # These options are only for real kernel hackers who want to get their hands dirty. 
 config DEBUG_LL
 	bool "Kernel low-level debugging functions"

arch/arm26/Kconfig

@@ -553,6 +553,15 @@ config KALLSYMS
 	  symbolic stack backtraces. This increases the size of the kernel
 	  somewhat, as all symbols have to be loaded into the kernel image.
 
+config DEBUG_INFO
+	bool "Compile the kernel with debug info"
+	depends on DEBUG_KERNEL
+	help
+          If you say Y here the resulting kernel image will include
+	  debugging info resulting in a larger kernel image.
+	  Say Y here only if you plan to use gdb to debug the kernel.
+	  If you don't debug the kernel, you can say N.
+
 # These options are only for real kernel hackers who want to get their hands dirty. 
 config DEBUG_LL
 	bool "Kernel low-level debugging functions"

arch/i386/Kconfig

@@ -1404,6 +1404,15 @@ config DEBUG_HIGHMEM
 	  This options enables addition error checking for high memory systems.
 	  Disable for production systems.
 
+config DEBUG_INFO
+	bool "Compile the kernel with debug info"
+	depends on DEBUG_KERNEL
+	help
+          If you say Y here the resulting kernel image will include
+	  debugging info resulting in a larger kernel image.
+	  Say Y here only if you plan to use gdb to debug the kernel.
+	  If you don't debug the kernel, you can say N.
+	  
 config KALLSYMS
 	bool "Load all symbols for debugging/kksymoops"
 	help

arch/ia64/Kconfig

@@ -825,6 +825,15 @@ config IA64_DEBUG_IRQ
 	  and restore instructions.  It's useful for tracking down spinlock
 	  problems, but slow!  If you're unsure, select N.
 
+config DEBUG_INFO
+	bool "Compile the kernel with debug info"
+	depends on DEBUG_KERNEL
+	help
+          If you say Y here the resulting kernel image will include
+	  debugging info resulting in a larger kernel image.
+	  Say Y here only if you plan to use gdb to debug the kernel.
+	  If you don't debug the kernel, you can say N.
+	  
 endmenu
 
 source "security/Kconfig"

arch/m68k/Kconfig

@@ -1292,6 +1292,15 @@ config DEBUG_BUGVERBOSE
 	bool "Verbose BUG() reporting"
 	depends on DEBUG_KERNEL
 
+config DEBUG_INFO
+	bool "Compile the kernel with debug info"
+	depends on DEBUG_KERNEL
+	help
+          If you say Y here the resulting kernel image will include
+	  debugging info resulting in a larger kernel image.
+	  Say Y here only if you plan to use gdb to debug the kernel.
+	  If you don't debug the kernel, you can say N.
+	  
 endmenu
 
 source "security/Kconfig"

arch/parisc/Kconfig

@@ -319,6 +319,15 @@ config KALLSYMS
 	  symbolic stack backtraces. This increases the size of the kernel
 	  somewhat, as all symbols have to be loaded into the kernel image.
 
+config DEBUG_INFO
+	bool "Compile the kernel with debug info"
+	depends on DEBUG_KERNEL
+	help
+          If you say Y here the resulting kernel image will include
+	  debugging info resulting in a larger kernel image.
+	  Say Y here only if you plan to use gdb to debug the kernel.
+	  If you don't debug the kernel, you can say N.
+	  
 endmenu
 
 source "security/Kconfig"

arch/ppc/Kconfig

@@ -1502,6 +1502,15 @@ config KGDB
 	  debugger.  See <http://kgdb.sourceforge.net/> for more information.
 	  Unless you are intending to debug the kernel, say N here.
 
+config DEBUG_INFO
+	bool "Compile the kernel with debug info"
+	depends on DEBUG_KERNEL
+	help
+          If you say Y here the resulting kernel image will include
+	  debugging info resulting in a larger kernel image.
+	  Say Y here only if you plan to use gdb to debug the kernel.
+	  If you don't debug the kernel, you can say N.
+	  
 choice
 	prompt "Serial Port"
 	depends on KGDB

arch/ppc64/Kconfig

@@ -444,6 +444,15 @@ config PPCDBG
 	bool "Include PPCDBG realtime debugging"
 	depends on DEBUG_KERNEL
 
+config DEBUG_INFO
+	bool "Compile the kernel with debug info"
+	depends on DEBUG_KERNEL
+	help
+          If you say Y here the resulting kernel image will include
+	  debugging info resulting in a larger kernel image.
+	  Say Y here only if you plan to use gdb to debug the kernel.
+	  If you don't debug the kernel, you can say N.
+	  
 endmenu
 
 source "security/Kconfig"

arch/s390/Kconfig

@@ -283,6 +283,15 @@ config KALLSYMS
 	  symbolic stack backtraces. This increases the size of the kernel
 	  somewhat, as all symbols have to be loaded into the kernel image.
 
+config DEBUG_INFO
+	bool "Compile the kernel with debug info"
+	depends on DEBUG_KERNEL
+	help
+          If you say Y here the resulting kernel image will include
+	  debugging info resulting in a larger kernel image.
+	  Say Y here only if you plan to use gdb to debug the kernel.
+	  If you don't debug the kernel, you can say N.
+	  
 config DEBUG_SPINLOCK_SLEEP
 	bool "Sleep-inside-spinlock checking"
 	help

arch/sparc64/Kconfig

@@ -965,6 +965,15 @@ config DEBUG_DCFLUSH
 	bool "D-cache flush debugging"
 	depends on DEBUG_KERNEL
 
+config DEBUG_INFO
+	bool "Compile the kernel with debug info"
+	depends on DEBUG_KERNEL
+	help
+          If you say Y here the resulting kernel image will include
+	  debugging info resulting in a larger kernel image.
+	  Say Y here only if you plan to use gdb to debug the kernel.
+	  If you don't debug the kernel, you can say N.
+	  
 config STACK_DEBUG
 	bool "Stack Overflow Detection Support"
 

arch/x86_64/Kconfig

@@ -563,6 +563,15 @@ config INIT_DEBUG
 	  Fill __init and __initdata at the end of boot. This helps debugging
 	  illegal uses of __init and __initdata after initialization.	  
 
+config DEBUG_INFO
+	bool "Compile the kernel with debug info"
+	depends on DEBUG_KERNEL
+	help
+          If you say Y here the resulting kernel image will include
+	  debugging info resulting in a larger kernel image.
+	  Say Y here only if you plan to use gdb to debug the kernel.
+	  If you don't debug the kernel, you can say N.
+	  
 config KALLSYMS
 	bool "Load all symbols for debugging/kksymoops"
 	help