[Buildroot] [PATCH v9 3/8] package: add support for top-level parallel make

Fabio Porcedda fabio.porcedda at gmail.com
Fri Nov 15 14:40:17 UTC 2013


To be able to use top-level parallel make we must not depend in a rule
on the order of evaluation of the prerequisites, so instead of relying
on the left to right ordering of evaluation of the prerequisites add
an explicit rule to describe the dependencies.

We cannot use the pattern rules because they must have the same
dependency for every package, but we need to change the dependencies
depending on $(2)_OVERRIDE_SRCDIR variable value, so we must use a
more flexible way like $(2)_TARGET_% variables.

So add explicit dependencies for the following stamp files:
  $(2)_TARGET_EXTRACT
  $(2)_TARGET_PATCH
  $(2)_TARGET_CONFIGURE
  $(2)_TARGET_BUILD
  $(2)_TARGET_INSTALL_STAGING
  $(2)_TARGET_INSTALL_TARGET
  $(2)_TARGET_INSTALL_IMAGES
  $(2)_TARGET_INSTALL_HOST

Signed-off-by: Fabio Porcedda <fabio.porcedda at gmail.com>
---
 package/glibc/glibc.mk   |  6 +++---
 package/pkg-generic.mk   | 40 +++++++++++++++++++++++-----------------
 package/uclibc/uclibc.mk |  6 +++---
 3 files changed, 29 insertions(+), 23 deletions(-)

diff --git a/package/glibc/glibc.mk b/package/glibc/glibc.mk
index 170fa93..460d2c1 100644
--- a/package/glibc/glibc.mk
+++ b/package/glibc/glibc.mk
@@ -26,9 +26,6 @@ GLIBC_ADD_TOOLCHAIN_DEPENDENCY = NO
 # cross-compiler and the kernel headers
 GLIBC_DEPENDENCIES = host-gcc-initial linux-headers host-gawk
 
-# Before (e)glibc is built, we must have the second stage cross-compiler
-glibc-build: host-gcc-intermediate
-
 GLIBC_SUBDIR = build
 
 GLIBC_INSTALL_STAGING = YES
@@ -130,3 +127,6 @@ define GLIBC_INSTALL_TARGET_CMDS
 endef
 
 $(eval $(autotools-package))
+
+# Before (e)glibc is built, we must have the second stage cross-compiler
+$(GLIBC_TARGET_BUILD): | host-gcc-intermediate
diff --git a/package/pkg-generic.mk b/package/pkg-generic.mk
index 0acd1e0..fdacc1f 100644
--- a/package/pkg-generic.mk
+++ b/package/pkg-generic.mk
@@ -432,30 +432,37 @@ $(1)-install:		$(1)-install-staging $(1)-install-target $(1)-install-images
 endif
 
 ifeq ($$($(2)_INSTALL_TARGET),YES)
-$(1)-install-target:	$(1)-build \
-			$$($(2)_TARGET_INSTALL_TARGET)
+$(1)-install-target:	$$($(2)_TARGET_INSTALL_TARGET)
 else
 $(1)-install-target:
 endif
 
 ifeq ($$($(2)_INSTALL_STAGING),YES)
-$(1)-install-staging:	$(1)-build \
-			$$($(2)_TARGET_INSTALL_STAGING)
+$(1)-install-staging:	$$($(2)_TARGET_INSTALL_STAGING)
 else
 $(1)-install-staging:
 endif
 
 ifeq ($$($(2)_INSTALL_IMAGES),YES)
-$(1)-install-images:	$(1)-build \
-			$$($(2)_TARGET_INSTALL_IMAGES)
+$(1)-install-images:	$$($(2)_TARGET_INSTALL_IMAGES)
 else
 $(1)-install-images:
 endif
 
-$(1)-install-host:      $(1)-build $$($(2)_TARGET_INSTALL_HOST)
+$(1)-install-host:      $$($(2)_TARGET_INSTALL_HOST)
 
-$(1)-build:		$(1)-configure \
-			$$($(2)_TARGET_BUILD)
+$$($(2)_TARGET_INSTALL_TARGET) $$($(2)_TARGET_INSTALL_STAGING) \
+$$($(2)_TARGET_INSTALL_IMAGES) $$($(2)_TARGET_INSTALL_HOST): \
+	$$($(2)_TARGET_BUILD)
+
+$(1)-build:		$$($(2)_TARGET_BUILD)
+$$($(2)_TARGET_BUILD):	$$($(2)_TARGET_CONFIGURE)
+
+# The symbol "|" specify a order-only-prerequisite, this is needed for
+# phony requisites to avoid rebuilding every time the target.
+
+$(1)-configure:			$$($(2)_TARGET_CONFIGURE)
+$$($(2)_TARGET_CONFIGURE):	| $$($(2)_DEPENDENCIES)
 
 $$($(2)_TARGET_SOURCE) $$($(2)_TARGET_RSYNC): | dirs prepare
 ifeq ($(filter $(1),$(DEPENDENCIES_HOST_PREREQ)),)
@@ -469,13 +476,13 @@ ifeq ($$($(2)_OVERRIDE_SRCDIR),)
 #  extract
 #  patch
 #  configure
-$(1)-configure:		$(1)-patch $(1)-depends \
-			$$($(2)_TARGET_CONFIGURE)
+$$($(2)_TARGET_CONFIGURE):	$$($(2)_TARGET_PATCH)
 
-$(1)-patch:		$(1)-extract $$($(2)_TARGET_PATCH)
+$(1)-patch:		$$($(2)_TARGET_PATCH)
+$$($(2)_TARGET_PATCH):	$$($(2)_TARGET_EXTRACT)
 
-$(1)-extract:		$(1)-source \
-			$$($(2)_TARGET_EXTRACT)
+$(1)-extract:			$$($(2)_TARGET_EXTRACT)
+$$($(2)_TARGET_EXTRACT):	$$($(2)_TARGET_SOURCE)
 
 $(1)-depends:		$$($(2)_DEPENDENCIES)
 
@@ -485,10 +492,9 @@ else
 #  source, by rsyncing
 #  depends
 #  configure
-$(1)-configure:		$(1)-depends \
-			$$($(2)_TARGET_CONFIGURE)
+$$($(2)_TARGET_CONFIGURE):	$$($(2)_TARGET_RSYNC)
 
-$(1)-depends:		$(1)-rsync $$($(2)_DEPENDENCIES)
+$(1)-depends:		$$($(2)_DEPENDENCIES)
 
 $(1)-patch:		$(1)-rsync
 $(1)-extract:		$(1)-rsync
diff --git a/package/uclibc/uclibc.mk b/package/uclibc/uclibc.mk
index 0d12afd..5bac643 100644
--- a/package/uclibc/uclibc.mk
+++ b/package/uclibc/uclibc.mk
@@ -25,9 +25,6 @@ UCLIBC_ADD_TOOLCHAIN_DEPENDENCY = NO
 # cross-compiler and the kernel headers
 UCLIBC_DEPENDENCIES = host-gcc-initial linux-headers
 
-# Before uClibc is built, we must have the second stage cross-compiler
-uclibc-build: host-gcc-intermediate
-
 # specifying UCLIBC_CONFIG_FILE on the command-line overrides the .config
 # setting.
 ifndef UCLIBC_CONFIG_FILE
@@ -559,3 +556,6 @@ uclibc-menuconfig: dirs uclibc-patch
 	rm -f $(UCLIBC_DIR)/.stamp_{configured,built,target_installed,staging_installed}
 
 $(eval $(generic-package))
+
+# Before uClibc is built, we must have the second stage cross-compiler
+$(UCLIBC_TARGET_BUILD): | host-gcc-intermediate
-- 
1.8.4.2



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