Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/gi…

…t/mmarek/kbuild-2.6

* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6:
  modpost: support objects with more than 64k sections
  trivial: fix a typo in a filename
  frv: clean up arch/frv/Makefile
  kbuild: allow assignment to {A,C}FLAGS_KERNEL on the command line
  kbuild: allow assignment to {A,C,LD}FLAGS_MODULE on the command line
  Kbuild: Add option to set -femit-struct-debug-baseonly
  Makefile: "make kernelrelease" should show the correct full kernel version
  Makefile.build: make KBUILD_SYMTYPES work again

Documentation/kbuild/kbuild.txt

@@ -22,11 +22,33 @@ building C files and assembler files.
 
 KAFLAGS
 --------------------------------------------------
-Additional options to the assembler.
+Additional options to the assembler (for built-in and modules).
+
+AFLAGS_MODULE
+--------------------------------------------------
+Addtional module specific options to use for $(AS).
+
+AFLAGS_KERNEL
+--------------------------------------------------
+Addtional options for $(AS) when used for assembler
+code for code that is compiled as built-in.
 
 KCFLAGS
 --------------------------------------------------
-Additional options to the C compiler.
+Additional options to the C compiler (for built-in and modules).
+
+CFLAGS_KERNEL
+--------------------------------------------------
+Addtional options for $(CC) when used to compile
+code that is compiled as built-in.
+
+CFLAGS_MODULE
+--------------------------------------------------
+Addtional module specific options to use for $(CC).
+
+LDFLAGS_MODULE
+--------------------------------------------------
+Additional options used for $(LD) when linking modules.
 
 KBUILD_VERBOSE
 --------------------------------------------------

Documentation/kbuild/makefiles.txt

@@ -921,16 +921,33 @@ When kbuild executes, the following steps are followed (roughly):
 	The first example utilises the trick that a config option expands
 	to 'y' when selected.
 
-    CFLAGS_KERNEL	$(CC) options specific for built-in
+    KBUILD_AFLAGS_KERNEL	$(AS) options specific for built-in
 
-	$(CFLAGS_KERNEL) contains extra C compiler flags used to compile
+	$(KBUILD_AFLAGS_KERNEL) contains extra C compiler flags used to compile
 	resident kernel code.
 
-    CFLAGS_MODULE	$(CC) options specific for modules
+    KBUILD_AFLAGS_MODULE   Options for $(AS) when building modules
 
-	$(CFLAGS_MODULE) contains extra C compiler flags used to compile code
-	for loadable kernel modules.
+	$(KBUILD_AFLAGS_MODULE) is used to add arch specific options that
+	are used for $(AS).
+	From commandline AFLAGS_MODULE shall be used (see kbuild.txt).
 
+    KBUILD_CFLAGS_KERNEL	$(CC) options specific for built-in
+
+	$(KBUILD_CFLAGS_KERNEL) contains extra C compiler flags used to compile
+	resident kernel code.
+
+    KBUILD_CFLAGS_MODULE   Options for $(CC) when building modules
+
+	$(KBUILD_CFLAGS_MODULE) is used to add arch specific options that
+	are used for $(CC).
+	From commandline CFLAGS_MODULE shall be used (see kbuild.txt).
+
+    KBUILD_LDFLAGS_MODULE   Options for $(LD) when linking modules
+
+	$(KBUILD_LDFLAGS_MODULE) is used to add arch specific options
+	used when linking modules. This is often a linker script.
+	From commandline LDFLAGS_MODULE shall be used (see kbuild.txt).
 
 --- 6.2 Add prerequisites to archprepare:
 

Makefile

@@ -332,10 +332,9 @@ CHECK		= sparse
 
 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
 		  -Wbitwise -Wno-return-void $(CF)
-MODFLAGS	= -DMODULE
-CFLAGS_MODULE   = $(MODFLAGS)
-AFLAGS_MODULE   = $(MODFLAGS)
-LDFLAGS_MODULE  = -T $(srctree)/scripts/module-common.lds
+CFLAGS_MODULE   =
+AFLAGS_MODULE   =
+LDFLAGS_MODULE  =
 CFLAGS_KERNEL	=
 AFLAGS_KERNEL	=
 CFLAGS_GCOV	= -fprofile-arcs -ftest-coverage
@@ -354,7 +353,12 @@ KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 		   -Werror-implicit-function-declaration \
 		   -Wno-format-security \
 		   -fno-delete-null-pointer-checks
+KBUILD_AFLAGS_KERNEL :=
+KBUILD_CFLAGS_KERNEL :=
 KBUILD_AFLAGS   := -D__ASSEMBLY__
+KBUILD_AFLAGS_MODULE  := -DMODULE
+KBUILD_CFLAGS_MODULE  := -DMODULE
+KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
 
 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
@@ -369,6 +373,8 @@ export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
+export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
+export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
 
 # When compiling out-of-tree modules, put MODVERDIR in the module
 # tree rather than in the kernel tree. The kernel tree might
@@ -414,7 +420,7 @@ endif
 no-dot-config-targets := clean mrproper distclean \
 			 cscope TAGS tags help %docs check% \
 			 include/linux/version.h headers_% \
-			 kernelrelease kernelversion
+			 kernelversion
 
 config-targets := 0
 mixed-targets  := 0
@@ -557,6 +563,10 @@ KBUILD_CFLAGS	+= -g
 KBUILD_AFLAGS	+= -gdwarf-2
 endif
 
+ifdef CONFIG_DEBUG_INFO_REDUCED
+KBUILD_CFLAGS 	+= $(call cc-option, -femit-struct-debug-baseonly)
+endif
+
 ifdef CONFIG_FUNCTION_TRACER
 KBUILD_CFLAGS	+= -pg
 endif
@@ -603,7 +613,7 @@ endif
 # Use --build-id when available.
 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
 			      $(call cc-ldoption, -Wl$(comma)--build-id,))
-LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
+KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
 
 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
@@ -1393,9 +1403,9 @@ checkstack:
 	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
 	$(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
 
-kernelrelease:
-	$(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
-	$(error kernelrelease not valid - run 'make prepare' to update it))
+kernelrelease: include/config/kernel.release
+	@echo $(KERNELRELEASE)
+
 kernelversion:
 	@echo $(KERNELVERSION)
 
@@ -1472,6 +1482,7 @@ cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
                   $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
 
 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
+	  $(KBUILD_AFLAGS_KERNEL)                              \
 	  $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
 	  $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
 

arch/avr32/Makefile

@@ -13,7 +13,7 @@ KBUILD_DEFCONFIG	:= atstk1002_defconfig
 
 KBUILD_CFLAGS	+= -pipe -fno-builtin -mno-pic
 KBUILD_AFLAGS	+= -mrelax -mno-pic
-CFLAGS_MODULE	+= -mno-relax
+KBUILD_CFLAGS_MODULE += -mno-relax
 LDFLAGS_vmlinux	+= --relax
 
 cpuflags-$(CONFIG_PLATFORM_AT32AP)	+= -march=ap

arch/blackfin/Makefile

@@ -18,8 +18,8 @@ ifeq ($(CONFIG_ROMKERNEL),y)
 KBUILD_CFLAGS           += -mlong-calls
 endif
 KBUILD_AFLAGS           += $(call cc-option,-mno-fdpic)
-CFLAGS_MODULE    += -mlong-calls
-LDFLAGS_MODULE   += -m elf32bfin
+KBUILD_CFLAGS_MODULE    += -mlong-calls
+KBUILD_LDFLAGS_MODULE   += -m elf32bfin
 KALLSYMS         += --symbol-prefix=_
 
 KBUILD_DEFCONFIG := BF537-STAMP_defconfig

arch/frv/Makefile

@@ -23,20 +23,14 @@
 # Copyright (C) 1994 by Hamish Macdonald
 #
 
-CCSPECS	:= $(shell $(CC) -v 2>&1 | grep "^Reading specs from " | head -1 | cut -c20-)
-CCDIR	:= $(strip $(patsubst %/specs,%,$(CCSPECS)))
-CPUCLASS := fr400
-
-# test for cross compiling
-COMPILE_ARCH = $(shell uname -m)
-
 ifdef CONFIG_MMU
 UTS_SYSNAME = -DUTS_SYSNAME=\"Linux\"
 else
 UTS_SYSNAME = -DUTS_SYSNAME=\"uClinux\"
 endif
 
-ARCHMODFLAGS	+= -G0 -mlong-calls
+KBUILD_AFLAGS_MODULE += -G0 -mlong-calls
+KBUILD_CFLAGS_MODULE += -G0 -mlong-calls
 
 ifdef CONFIG_GPREL_DATA_8
 KBUILD_CFLAGS	+= -G8
@@ -54,7 +48,6 @@ endif
 
 ifdef CONFIG_GC_SECTIONS
 KBUILD_CFLAGS	+= -ffunction-sections -fdata-sections
-LINKFLAGS	+= --gc-sections
 endif
 
 ifndef CONFIG_FRAME_POINTER
@@ -64,16 +57,13 @@ endif
 ifdef CONFIG_CPU_FR451_COMPILE
 KBUILD_CFLAGS	+= -mcpu=fr450
 KBUILD_AFLAGS	+= -mcpu=fr450
-ASFLAGS		+= -mcpu=fr450
 else
 ifdef CONFIG_CPU_FR551_COMPILE
 KBUILD_CFLAGS	+= -mcpu=fr550
 KBUILD_AFLAGS	+= -mcpu=fr550
-ASFLAGS		+= -mcpu=fr550
 else
 KBUILD_CFLAGS	+= -mcpu=fr400
 KBUILD_AFLAGS	+= -mcpu=fr400
-ASFLAGS		+= -mcpu=fr400
 endif
 endif
 
@@ -83,14 +73,12 @@ endif
 KBUILD_CFLAGS	+= -mno-fdpic -mgpr-32 -msoft-float -mno-media
 KBUILD_CFLAGS	+= -ffixed-fcc3 -ffixed-cc3 -ffixed-gr15 -ffixed-icc2
 KBUILD_AFLAGS	+= -mno-fdpic
-ASFLAGS		+= -mno-fdpic
 
 # make sure the .S files get compiled with debug info
 # and disable optimisations that are unhelpful whilst debugging
 ifdef CONFIG_DEBUG_INFO
 #KBUILD_CFLAGS	+= -O1
 KBUILD_AFLAGS	+= -Wa,--gdwarf2
-ASFLAGS		+= -Wa,--gdwarf2
 endif
 
 head-y		:= arch/frv/kernel/head.o arch/frv/kernel/init_task.o
@@ -105,11 +93,5 @@ all: Image
 Image: vmlinux
 	$(Q)$(MAKE) $(build)=arch/frv/boot $@
 
-bootstrap:
-	$(Q)$(MAKEBOOT) bootstrap
-
 archclean:
 	$(Q)$(MAKE) $(clean)=arch/frv/boot
-
-archdep: scripts/mkdep symlinks
-	$(Q)$(MAKE) $(build)=arch/frv/boot dep

arch/ia64/Makefile

@@ -22,13 +22,13 @@ CHECKFLAGS	+= -m64 -D__ia64=1 -D__ia64__=1 -D_LP64 -D__LP64__
 
 OBJCOPYFLAGS	:= --strip-all
 LDFLAGS_vmlinux	:= -static
-LDFLAGS_MODULE	+= -T $(srctree)/arch/ia64/module.lds
-AFLAGS_KERNEL	:= -mconstant-gp
+KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/ia64/module.lds
+KBUILD_AFLAGS_KERNEL := -mconstant-gp
 EXTRA		:=
 
 cflags-y	:= -pipe $(EXTRA) -ffixed-r13 -mfixed-range=f12-f15,f32-f127 \
 		   -falign-functions=32 -frename-registers -fno-optimize-sibling-calls
-CFLAGS_KERNEL	:= -mconstant-gp
+KBUILD_CFLAGS_KERNEL := -mconstant-gp
 
 GAS_STATUS	= $(shell $(srctree)/arch/ia64/scripts/check-gas "$(CC)" "$(OBJDUMP)")
 KBUILD_CPPFLAGS += $(shell $(srctree)/arch/ia64/scripts/toolchain-flags "$(CC)" "$(OBJDUMP)" "$(READELF)")

arch/m32r/Makefile

@@ -12,8 +12,8 @@ OBJCOPYFLAGS	:= -O binary -R .note -R .comment -S
 LDFLAGS_vmlinux	:=
 
 KBUILD_CFLAGS += -pipe -fno-schedule-insns
-CFLAGS_KERNEL += -mmodel=medium
-CFLAGS_MODULE += -mmodel=large
+KBUILD_CFLAGS_KERNEL += -mmodel=medium
+KBUILD_CFLAGS_MODULE += -mmodel=large
 
 ifdef CONFIG_CHIP_VDEC2
 cflags-$(CONFIG_ISA_M32R2)	+= -DNO_FPU -Wa,-bitinst

arch/m68k/Makefile

@@ -18,7 +18,7 @@ KBUILD_DEFCONFIG := multi_defconfig
 # override top level makefile
 AS += -m68020
 LDFLAGS := -m m68kelf
-LDFLAGS_MODULE += -T $(srctree)/arch/m68k/kernel/module.lds
+KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/m68k/kernel/module.lds
 ifneq ($(SUBARCH),$(ARCH))
 	ifeq ($(CROSS_COMPILE),)
 		CROSS_COMPILE := $(call cc-cross-prefix, \

arch/mips/Makefile

@@ -93,7 +93,8 @@ all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
 cflags-y			+= -G 0 -mno-abicalls -fno-pic -pipe
 cflags-y			+= -msoft-float
 LDFLAGS_vmlinux			+= -G 0 -static -n -nostdlib
-MODFLAGS			+= -mlong-calls
+KBUILD_AFLAGS_MODULE		+= -mlong-calls
+KBUILD_CFLAGS_MODULE		+= -mlong-calls
 
 cflags-y += -ffreestanding
 
@@ -165,7 +166,8 @@ cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)	+= $(call cc-option,-mno-daddi,)
 
 ifdef CONFIG_CPU_SB1
 ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
-MODFLAGS	+= -msb1-pass1-workarounds
+KBUILD_AFLAGS_MODULE += -msb1-pass1-workarounds
+KBUILD_CFLAGS_MODULE += -msb1-pass1-workarounds
 endif
 endif
 

arch/powerpc/Makefile

@@ -94,7 +94,7 @@ else
 endif
 endif
 
-LDFLAGS_MODULE	+= arch/powerpc/lib/crtsavres.o
+KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
 
 ifeq ($(CONFIG_TUNE_CELL),y)
 	KBUILD_CFLAGS += $(call cc-option,-mtune=cell)

arch/s390/Makefile

@@ -24,7 +24,8 @@ CHECKFLAGS	+= -D__s390__ -msize-long
 else
 LD_BFD		:= elf64-s390
 LDFLAGS		:= -m elf64_s390
-MODFLAGS	+= -fpic -D__PIC__
+KBUILD_AFLAGS_MODULE += -fpic -D__PIC__
+KBUILD_CFLAGS_MODULE += -fpic -D__PIC__
 KBUILD_CFLAGS	+= -m64
 KBUILD_AFLAGS	+= -m64
 UTS_MACHINE	:= s390x

arch/score/Makefile

@@ -20,7 +20,8 @@ cflags-y += -G0 -pipe -mel -mnhwloop -D__SCOREEL__ \
 #
 KBUILD_AFLAGS += $(cflags-y)
 KBUILD_CFLAGS += $(cflags-y)
-MODFLAGS += -mlong-calls
+KBUILD_AFLAGS_MODULE += -mlong-calls
+KBUILD_CFLAGS_MODULE += -mlong-calls
 LDFLAGS += --oformat elf32-littlescore
 LDFLAGS_vmlinux	+= -G0 -static -nostdlib
 

lib/Kconfig.debug

@@ -628,6 +628,19 @@ config DEBUG_INFO
 
 	  If unsure, say N.
 
+config DEBUG_INFO_REDUCED
+	bool "Reduce debugging information"
+	depends on DEBUG_INFO
+	help
+	  If you say Y here gcc is instructed to generate less debugging
+	  information for structure types. This means that tools that
+	  need full debugging information (like kgdb or systemtap) won't
+	  be happy. But if you merely need debugging information to
+	  resolve line numbers there is no loss. Advantage is that
+	  build directory object sizes shrink dramatically over a full
+	  DEBUG_INFO build and compile times are reduced too.
+	  Only works with newer gcc versions.
+
 config DEBUG_VM
 	bool "Debug VM"
 	depends on DEBUG_KERNEL