diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 15:37:02 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 15:37:02 -0700 |
commit | c37efa932598de5e30330a1414e34d9e082e0d9e (patch) | |
tree | 1e3b782d257fa39a54f583af3dc7c32d7cffc67d | |
parent | 9e12a7e7d89ad813d01092890010cf67d0f914bd (diff) | |
parent | abe1ee3a221d53778c3e58747bbec6e518e5471b (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next: (30 commits)
Use macros for .data.page_aligned section.
Use macros for .bss.page_aligned section.
Use new __init_task_data macro in arch init_task.c files.
kbuild: Don't define ALIGN and ENTRY when preprocessing linker scripts.
arm, cris, mips, sparc, powerpc, um, xtensa: fix build with bash 4.0
kbuild: add static to prototypes
kbuild: fail build if recordmcount.pl fails
kbuild: set -fconserve-stack option for gcc 4.5
kbuild: echo the record_mcount command
gconfig: disable "typeahead find" search in treeviews
kbuild: fix cc1 options check to ensure we do not use -fPIC when compiling
checkincludes.pl: add option to remove duplicates in place
markup_oops: use modinfo to avoid confusion with underscored module names
checkincludes.pl: provide usage helper
checkincludes.pl: close file as soon as we're done with it
ctags: usability fix
kernel hacking: move STRIP_ASM_SYMS from General
gitignore usr/initramfs_data.cpio.bz2 and usr/initramfs_data.cpio.lzma
kbuild: Check if linker supports the -X option
kbuild: introduce ld-option
...
Fix trivial conflict in scripts/basic/fixdep.c
94 files changed, 473 insertions, 354 deletions
diff --git a/Documentation/kbuild/kbuild.txt b/Documentation/kbuild/kbuild.txt index f3355b6812d..bb3bf38f03d 100644 --- a/Documentation/kbuild/kbuild.txt +++ b/Documentation/kbuild/kbuild.txt @@ -65,6 +65,22 @@ INSTALL_PATH INSTALL_PATH specifies where to place the updated kernel and system map images. Default is /boot, but you can set it to other values. +INSTALLKERNEL +-------------------------------------------------- +Install script called when using "make install". +The default name is "installkernel". + +The script will be called with the following arguments: + $1 - kernel version + $2 - kernel image file + $3 - kernel map file + $4 - default install path (use root directory if blank) + +The implmentation of "make install" is architecture specific +and it may differ from the above. + +INSTALLKERNEL is provided to enable the possibility to +specify a custom installer when cross compiling a kernel. MODLIB -------------------------------------------------- diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt index d76cfd8712e..71c602d6168 100644 --- a/Documentation/kbuild/makefiles.txt +++ b/Documentation/kbuild/makefiles.txt @@ -18,6 +18,7 @@ This document describes the Linux kernel Makefiles. --- 3.9 Dependency tracking --- 3.10 Special Rules --- 3.11 $(CC) support functions + --- 3.12 $(LD) support functions === 4 Host Program support --- 4.1 Simple Host Program @@ -435,14 +436,14 @@ more details, with real examples. The second argument is optional, and if supplied will be used if first argument is not supported. - ld-option - ld-option is used to check if $(CC) when used to link object files + cc-ldoption + cc-ldoption is used to check if $(CC) when used to link object files supports the given option. An optional second option may be specified if first option are not supported. Example: #arch/i386/kernel/Makefile - vsyscall-flags += $(call ld-option, -Wl$(comma)--hash-style=sysv) + vsyscall-flags += $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) In the above example, vsyscall-flags will be assigned the option -Wl$(comma)--hash-style=sysv if it is supported by $(CC). @@ -570,6 +571,19 @@ more details, with real examples. endif endif +--- 3.12 $(LD) support functions + + ld-option + ld-option is used to check if $(LD) supports the supplied option. + ld-option takes two options as arguments. + The second argument is an optional option that can be used if the + first option is not supported by $(LD). + + Example: + #Makefile + LDFLAGS_vmlinux += $(call really-ld-option, -X) + + === 4 Host Program support Kbuild supports building executables on the host for use during the @@ -179,9 +179,46 @@ SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ # Alternatively CROSS_COMPILE can be set in the environment. # Default value for CROSS_COMPILE is not to prefix executables # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile +# +# To force ARCH and CROSS_COMPILE settings include kernel.* files +# in the kernel tree - do not patch this file. export KBUILD_BUILDHOST := $(SUBARCH) -ARCH ?= $(SUBARCH) -CROSS_COMPILE ?= + +# Kbuild save the ARCH and CROSS_COMPILE setting in kernel.* files. +# Restore these settings and check that user did not specify +# conflicting values. + +saved_arch := $(shell cat include/generated/kernel.arch 2> /dev/null) +saved_cross := $(shell cat include/generated/kernel.cross 2> /dev/null) + +ifneq ($(CROSS_COMPILE),) + ifneq ($(saved_cross),) + ifneq ($(CROSS_COMPILE),$(saved_cross)) + $(error CROSS_COMPILE changed from \ + "$(saved_cross)" to \ + to "$(CROSS_COMPILE)". \ + Use "make mrproper" to fix it up) + endif + endif +else + CROSS_COMPILE := $(saved_cross) +endif + +ifneq ($(ARCH),) + ifneq ($(saved_arch),) + ifneq ($(saved_arch),$(ARCH)) + $(error ARCH changed from \ + "$(saved_arch)" to "$(ARCH)". \ + Use "make mrproper" to fix it up) + endif + endif +else + ifneq ($(saved_arch),) + ARCH := $(saved_arch) + else + ARCH := $(SUBARCH) + endif +endif # Architecture as present in compile.h UTS_MACHINE := $(ARCH) @@ -315,6 +352,7 @@ OBJCOPY = $(CROSS_COMPILE)objcopy OBJDUMP = $(CROSS_COMPILE)objdump AWK = awk GENKSYMS = scripts/genksyms/genksyms +INSTALLKERNEL := installkernel DEPMOD = /sbin/depmod KALLSYMS = scripts/kallsyms PERL = perl @@ -353,7 +391,8 @@ KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC -export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE +export CPP AR NM STRIP OBJCOPY OBJDUMP +export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS @@ -444,6 +483,11 @@ ifeq ($(config-targets),1) include $(srctree)/arch/$(SRCARCH)/Makefile export KBUILD_DEFCONFIG KBUILD_KCONFIG +# save ARCH & CROSS_COMPILE settings +$(shell mkdir -p include/generated && \ + echo $(ARCH) > include/generated/kernel.arch && \ + echo $(CROSS_COMPILE) > include/generated/kernel.cross) + config: scripts_basic outputmakefile FORCE $(Q)mkdir -p include/linux include/config $(Q)$(MAKE) $(build)=scripts/kconfig $@ @@ -571,6 +615,9 @@ KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) # revert to pre-gcc-4.4 behaviour of .eh_frame KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) +# conserve stack if available +KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) + # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments # But warn user when we do so warn-assign = \ @@ -591,12 +638,12 @@ endif # Use --build-id when available. LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ - $(call ld-option, -Wl$(comma)--build-id,)) + $(call cc-ldoption, -Wl$(comma)--build-id,)) LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) ifeq ($(CONFIG_STRIP_ASM_SYMS),y) -LDFLAGS_vmlinux += -X +LDFLAGS_vmlinux += $(call ld-option, -X,) endif # Default kernel image to build when no specific target is given. @@ -980,11 +1027,6 @@ prepare0: archprepare FORCE # All the preparing.. prepare: prepare0 -# Leave this as default for preprocessing vmlinux.lds.S, which is now -# done in arch/$(ARCH)/kernel/Makefile - -export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) - # The asm symlink changes when $(ARCH) changes. # Detect this and ask user to run make mrproper # If asm is a stale symlink (point to dir that does not exist) remove it diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 54661125a8b..a73caaf6676 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -14,7 +14,7 @@ LDFLAGS_vmlinux :=-p --no-undefined -X ifeq ($(CONFIG_CPU_ENDIAN_BE8),y) LDFLAGS_vmlinux += --be8 endif -CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET) + OBJCOPYFLAGS :=-O binary -R .note -R .note.gnu.build-id -R .comment -S GZFLAGS :=-9 #KBUILD_CFLAGS +=-pipe @@ -279,7 +279,7 @@ define archhelp echo ' (supply initrd image via make variable INITRD=<path>)' echo ' install - Install uncompressed kernel' echo ' zinstall - Install compressed kernel' - echo ' Install using (your) ~/bin/installkernel or' - echo ' (distribution) /sbin/installkernel or' + echo ' Install using (your) ~/bin/$(INSTALLKERNEL) or' + echo ' (distribution) /sbin/$(INSTALLKERNEL) or' echo ' install to $$(INSTALL_PATH) and run lilo' endef diff --git a/arch/arm/boot/install.sh b/arch/arm/boot/install.sh index 9f9bed20734..06ea7d42ce8 100644 --- a/arch/arm/boot/install.sh +++ b/arch/arm/boot/install.sh @@ -21,8 +21,8 @@ # # User may have a custom install script -if [ -x ~/bin/${CROSS_COMPILE}installkernel ]; then exec ~/bin/${CROSS_COMPILE}installkernel "$@"; fi -if [ -x /sbin/${CROSS_COMPILE}installkernel ]; then exec /sbin/${CROSS_COMPILE}installkernel "$@"; fi +if [ -x ~/bin/${INSTALLKERNEL} ]; then exec ~/bin/${INSTALLKERNEL} "$@"; fi +if [ -x /sbin/${INSTALLKERNEL} ]; then exec /sbin/${INSTALLKERNEL} "$@"; fi if [ "$(basename $2)" = "zImage" ]; then # Compressed install diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile index 3213c9382b1..c446aeff7b8 100644 --- a/arch/arm/kernel/Makefile +++ b/arch/arm/kernel/Makefile @@ -2,7 +2,8 @@ # Makefile for the linux kernel. # -AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET) +CPPFLAGS_vmlinux.lds := -DTEXT_OFFSET=$(TEXT_OFFSET) +AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET) ifdef CONFIG_DYNAMIC_FTRACE CFLAGS_REMOVE_ftrace.o = -pg diff --git a/arch/arm/kernel/init_task.c b/arch/arm/kernel/init_task.c index 3f470866bb8..e7cbb50dc35 100644 --- a/arch/arm/kernel/init_task.c +++ b/arch/arm/kernel/init_task.c @@ -24,9 +24,8 @@ static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); * * The things we do for performance.. */ -union thread_union init_thread_union - __attribute__((__section__(".data.init_task"))) = - { INIT_THREAD_INFO(init_task) }; +union thread_union init_thread_union __init_task_data = + { INIT_THREAD_INFO(init_task) }; /* * Initial task structure. diff --git a/arch/avr32/kernel/init_task.c b/arch/avr32/kernel/init_task.c index 57ec9f2dcd9..6b2343e6fe3 100644 --- a/arch/avr32/kernel/init_task.c +++ b/arch/avr32/kernel/init_task.c @@ -18,9 +18,8 @@ static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); /* * Initial thread structure. Must be aligned on an 8192-byte boundary. */ -union thread_union init_thread_union - __attribute__((__section__(".data.init_task"))) = - { INIT_THREAD_INFO(init_task) }; +union thread_union init_thread_union __init_task_data = + { INIT_THREAD_INFO(init_task) }; /* * Initial task structure. diff --git a/arch/avr32/mm/init.c b/arch/avr32/mm/init.c index 376f18c4a6c..94925641e53 100644 --- a/arch/avr32/mm/init.c +++ b/arch/avr32/mm/init.c @@ -24,11 +24,9 @@ #include |