kbuild: rename prepare to archprepare to fix dependency chain
When introducing the generic asm-offsets.h support the dependency
chain for the prepare targets was changed. All build scripts expecting
include/asm/asm-offsets.h to be made when using the prepare target would broke.
With the limited number of prepare targets left in arch Makefiles
the trivial solution was to introduce a new arch specific target: archprepare
The dependency chain looks like this now:
prepare
|
+--> prepare0
|
+--> archprepare
|
+--> scripts_basic
+--> prepare1
|
+---> prepare2
|
+--> prepare3
So prepare 3 is processed before prepare2 etc.
This guaantees that the asm symlink, version.h, scripts_basic
are all updated before archprepare is processed.
prepare0 which build the asm-offsets.h file will need the
actions performed by archprepare.
The head target is now named prepare, because users scripts will most
likely use that target, but prepare-all has been kept for compatibility.
Updated Documentation/kbuild/makefiles.txt.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index 9a15865..d802ce8 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -31,7 +31,7 @@
=== 6 Architecture Makefiles
--- 6.1 Set variables to tweak the build to the architecture
- --- 6.2 Add prerequisites to prepare:
+ --- 6.2 Add prerequisites to archprepare:
--- 6.3 List directories to visit when descending
--- 6.4 Architecture specific boot images
--- 6.5 Building non-kbuild targets
@@ -734,18 +734,18 @@
for loadable kernel modules.
---- 6.2 Add prerequisites to prepare:
+--- 6.2 Add prerequisites to archprepare:
- The prepare: rule is used to list prerequisites that needs to be
+ The archprepare: rule is used to list prerequisites that needs to be
built before starting to descend down in the subdirectories.
This is usual header files containing assembler constants.
Example:
- #arch/s390/Makefile
- prepare: include/asm-$(ARCH)/offsets.h
+ #arch/arm/Makefile
+ archprepare: maketools
- In this example the file include/asm-$(ARCH)/offsets.h will
- be built before descending down in the subdirectories.
+ In this example the file target maketools will be processed
+ before descending down in the subdirectories.
See also chapter XXX-TODO that describe how kbuild supports
generating offset header files.
diff --git a/Makefile b/Makefile
index 382298f..e90ee6a 100644
--- a/Makefile
+++ b/Makefile
@@ -776,15 +776,20 @@
# Error messages still appears in the original language
.PHONY: $(vmlinux-dirs)
-$(vmlinux-dirs): prepare-all scripts
+$(vmlinux-dirs): prepare scripts
$(Q)$(MAKE) $(build)=$@
# Things we need to do before we recursively start building the kernel
-# or the modules are listed in "prepare-all".
-# A multi level approach is used. prepare1 is updated first, then prepare0.
-# prepare-all is the collection point for the prepare targets.
+# or the modules are listed in "prepare".
+# A multi level approach is used. prepareN is processed before prepareN-1.
+# archprepare is used in arch Makefiles and when processed asm symlink,
+# version.h and scripts_basic is processed / created.
-.PHONY: prepare-all prepare prepare0 prepare1 prepare2 prepare3
+# Listed in dependency order
+.PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
+
+# prepare-all is deprecated, use prepare as valid replacement
+.PHONY: prepare-all
# prepare3 is used to check if we are building in a separate output directory,
# and if so do:
@@ -813,11 +818,13 @@
$(Q)mkdir -p $(MODVERDIR)
endif
-prepare0: prepare prepare1 FORCE
+archprepare: prepare1 scripts_basic
+
+prepare0: archprepare FORCE
$(Q)$(MAKE) $(build)=.
# All the preparing..
-prepare-all: prepare0
+prepare prepare-all: prepare0
# Leave this as default for preprocessing vmlinux.lds.S, which is now
# done in arch/$(ARCH)/kernel/Makefile
@@ -908,7 +915,7 @@
# Target to prepare building external modules
.PHONY: modules_prepare
-modules_prepare: prepare-all scripts
+modules_prepare: prepare scripts
# Target to install modules
.PHONY: modules_install
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index e625ac6..130e622 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -175,7 +175,7 @@
endif
@touch $@
-prepare: maketools include/asm-arm/.arch
+archprepare: maketools include/asm-arm/.arch
.PHONY: maketools FORCE
maketools: include/linux/version.h FORCE
diff --git a/arch/cris/Makefile b/arch/cris/Makefile
index a00043a..ea65d58 100644
--- a/arch/cris/Makefile
+++ b/arch/cris/Makefile
@@ -107,7 +107,7 @@
rm -f timage vmlinux.bin decompress.bin rescue.bin cramfs.img
rm -rf $(LD_SCRIPT).tmp
-prepare: $(SRC_ARCH)/.links $(srctree)/include/asm-$(ARCH)/.arch
+archprepare: $(SRC_ARCH)/.links $(srctree)/include/asm-$(ARCH)/.arch
# Create some links to make all tools happy
$(SRC_ARCH)/.links:
diff --git a/arch/ia64/Makefile b/arch/ia64/Makefile
index 7ed678c..70f8ed2 100644
--- a/arch/ia64/Makefile
+++ b/arch/ia64/Makefile
@@ -82,7 +82,7 @@
archclean:
$(Q)$(MAKE) $(clean)=$(boot)
-prepare: include/asm-ia64/.offsets.h.stamp
+archprepare: include/asm-ia64/.offsets.h.stamp
include/asm-ia64/.offsets.h.stamp:
mkdir -p include/asm-ia64
diff --git a/arch/ppc/Makefile b/arch/ppc/Makefile
index 6dd7b50..16e2675 100644
--- a/arch/ppc/Makefile
+++ b/arch/ppc/Makefile
@@ -107,7 +107,7 @@
# Temporary hack until we have migrated to asm-powerpc
$(Q)rm -rf arch/$(ARCH)/include
-prepare: checkbin
+archprepare: checkbin
# Temporary hack until we have migrated to asm-powerpc
include/asm: arch/$(ARCH)/include/asm
diff --git a/arch/sh/Makefile b/arch/sh/Makefile
index 19f00d5..4a30490 100644
--- a/arch/sh/Makefile
+++ b/arch/sh/Makefile
@@ -152,7 +152,7 @@
@touch $@
-prepare: maketools include/asm-sh/.cpu include/asm-sh/.mach
+archprepare: maketools include/asm-sh/.cpu include/asm-sh/.mach
.PHONY: maketools FORCE
maketools: include/linux/version.h FORCE
diff --git a/arch/sh64/Makefile b/arch/sh64/Makefile
index 3907373..8ca57ff 100644
--- a/arch/sh64/Makefile
+++ b/arch/sh64/Makefile
@@ -73,7 +73,7 @@
archclean:
$(Q)$(MAKE) $(clean)=$(boot)
-prepare: arch/$(ARCH)/lib/syscalltab.h
+archprepare: arch/$(ARCH)/lib/syscalltab.h
define filechk_gen-syscalltab
(set -e; \
diff --git a/arch/um/Makefile b/arch/um/Makefile
index 154803a..ce98726 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -107,7 +107,7 @@
$(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch)
endif
-prepare: $(ARCH_SYMLINKS) $(SYS_HEADERS) $(GEN_HEADERS)
+archprepare: $(ARCH_SYMLINKS) $(SYS_HEADERS) $(GEN_HEADERS)
LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
diff --git a/arch/xtensa/Makefile b/arch/xtensa/Makefile
index 67ef4cd..98fac848 100644
--- a/arch/xtensa/Makefile
+++ b/arch/xtensa/Makefile
@@ -66,7 +66,7 @@
archinc := include/asm-xtensa
-prepare: $(archinc)/.platform
+archprepare: $(archinc)/.platform
# Update machine cpu and platform symlinks if something which affects
# them changed.