path: root/Makefile
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authorLinus Torvalds <torvalds@linux-foundation.org>2010-06-01 08:55:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-06-01 08:55:52 -0700
commit1f73897861b8ef0be64ff4b801f8d6f830f683b5 (patch)
treeb4bae8f12e1422113910d8cb00a19d010dc4a52f /Makefile
parentb904d7131d116900524bd36ec170dcd97846bfd3 (diff)
parent64ffc9ff424c65adcffe7d590018cc75e2d5d42a (diff)
Merge branch 'for-35' of git://repo.or.cz/linux-kbuild
* 'for-35' of git://repo.or.cz/linux-kbuild: (81 commits) kbuild: Revert part of e8d400a to resolve a conflict kbuild: Fix checking of scm-identifier variable gconfig: add support to show hidden options that have prompts menuconfig: add support to show hidden options which have prompts gconfig: remove show_debug option gconfig: remove dbg_print_ptype() and dbg_print_stype() kconfig: fix zconfdump() kconfig: some small fixes add random binaries to .gitignore kbuild: Include gen_initramfs_list.sh and the file list in the .d file kconfig: recalc symbol value before showing search results .gitignore: ignore *.lzo files headerdep: perlcritic warning scripts/Makefile.lib: Align the output of LZO kbuild: Generate modules.builtin in make modules_install Revert "kbuild: specify absolute paths for cscope" kbuild: Do not unnecessarily regenerate modules.builtin headers_install: use local file handles headers_check: fix perl warnings export_report: fix perl warnings ...
Diffstat (limited to 'Makefile')
1 files changed, 40 insertions, 25 deletions
diff --git a/Makefile b/Makefile
index 6e39ec701cb..efdc3d0d8e6 100644
--- a/Makefile
+++ b/Makefile
@@ -183,11 +183,14 @@ SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
# CROSS_COMPILE can be set on the command line
# make CROSS_COMPILE=ia64-linux-
# Alternatively CROSS_COMPILE can be set in the environment.
+# A third alternative is to store a setting in .config so that plain
+# "make" in the configured kernel build directory always uses that.
# Default value for CROSS_COMPILE is not to prefix executables
# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
# Architecture as present in compile.h
@@ -576,9 +579,6 @@ KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
# disable invalid "can't wrap" optimizations for signed / pointers
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)
@@ -882,9 +882,6 @@ $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
PHONY += $(vmlinux-dirs)
$(vmlinux-dirs): prepare scripts
$(Q)$(MAKE) $(build)=$@
- $(Q)$(MAKE) $(modbuiltin)=$@
# Build the kernel release string
@@ -907,14 +904,19 @@ endif
# $(localver)
# localversion* (files without backups, containing '~')
# $(CONFIG_LOCALVERSION) (from kernel config setting)
-# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
-# ./scripts/setlocalversion (SCM tag, if one exists)
-# $(LOCALVERSION) (from make command line if provided)
+# $(LOCALVERSION) (from make command line, if provided)
+# $(localver-extra)
+# $(scm-identifier) (unique SCM tag, if one exists)
+# ./scripts/setlocalversion (only with CONFIG_LOCALVERSION_AUTO)
+# .scmversion (only with CONFIG_LOCALVERSION_AUTO)
+# and without LOCALVERSION= and
+# repository is at non-tagged commit)
-# Note how the final $(localver-auto) string is included *only* if the
-# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
-# moment, only git is supported but other SCMs can edit the script
-# scripts/setlocalversion and add the appropriate checks as needed.
+# For kernels without CONFIG_LOCALVERSION_AUTO compiled from an SCM that has
+# been revised beyond a tagged commit, `+' is appended to the version string
+# when not overridden by using "make LOCALVERSION=". This indicates that the
+# kernel is not a vanilla release version and has been modified.
pattern = ".*/localversion[^~]*"
string = $(shell cat /dev/null \
@@ -923,26 +925,32 @@ string = $(shell cat /dev/null \
localver = $(subst $(space),, $(string) \
$(patsubst "%",%,$(CONFIG_LOCALVERSION)))
-# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
-# and if the SCM is know a tag from the SCM is appended.
-# The appended tag is determined by the SCM used.
+# scripts/setlocalversion is called to create a unique identifier if the source
+# is managed by a known SCM and the repository has been revised since the last
+# tagged (release) commit. The format of the identifier is determined by the
+# SCM's implementation.
# .scmversion is used when generating rpm packages so we do not loose
# the version information from the SCM when we do the build of the kernel
# from the copied source
ifeq ($(wildcard .scmversion),)
- _localver-auto = $(shell $(CONFIG_SHELL) \
+ scm-identifier = $(shell $(CONFIG_SHELL) \
$(srctree)/scripts/setlocalversion $(srctree))
- _localver-auto = $(shell cat .scmversion 2> /dev/null)
+ scm-identifier = $(shell cat .scmversion 2> /dev/null)
- localver-auto = $(LOCALVERSION)$(_localver-auto)
+ localver-extra = $(scm-identifier)
+ ifneq ($(scm-identifier),)
+ ifeq ($(LOCALVERSION),)
+ localver-extra = +
+ endif
+ endif
-localver-full = $(localver)$(localver-auto)
+localver-full = $(localver)$(LOCALVERSION)$(localver-extra)
# Store (new) KERNELRELASE string in include/config/kernel.release
kernelrelease = $(KERNELVERSION)$(localver-full)
@@ -1089,11 +1097,16 @@ all: modules
PHONY += modules
modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
$(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
- $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.builtin) > $(objtree)/modules.builtin
@$(kecho) ' Building modules, stage 2.';
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
+modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
+ $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
+%/modules.builtin: include/config/auto.conf
+ $(Q)$(MAKE) $(modbuiltin)=$*
# Target to prepare building external modules
PHONY += modules_prepare
@@ -1104,7 +1117,7 @@ PHONY += modules_install
modules_install: _modinst_ _modinst_post
PHONY += _modinst_
+_modinst_: modules.builtin
@if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
echo "Warning: you may need to install module-init-tools"; \
echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
@@ -1247,7 +1260,9 @@ help:
@echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
@echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
@echo ' dir/ - Build all files in dir and below'
- @echo ' dir/file.[ois] - Build specified target only'
+ @echo ' dir/file.[oisS] - Build specified target only'
+ @echo ' dir/file.lst - Build specified mixed source/assembly target only'
+ @echo ' (requires a recent binutils and recent build (System.map))'
@echo ' dir/file.ko - Build module including final link'
@echo ' modules_prepare - Set up for building external modules'
@echo ' tags/TAGS - Generate tags file for editors'