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Support parallel build of certain packages

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SVN-Revision: 22696
This commit is contained in:
Michael Büsch 2010-08-18 13:57:58 +00:00
parent 4bd5e0e62e
commit 7ed7784f59
3 changed files with 35 additions and 1 deletions
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32
Config.in
View file

@ -215,6 +215,38 @@ menu "Global build settings"
help
Enable IPV6 support in packages (passes --enable-ipv6 to configure scripts).
config PKG_BUILD_PARALLEL
bool
prompt "Compile certain packages parallelized"
default n
help
This adds a -jX option to certain packages that are known to
behave well for parallel build.
Note that this may overcommit CPU resources depending on the
-j level of the main make process, the number of package
submake jobs selected below and the number of actual CPUs present.
Example: If the main make is passed a -j4 and the submake -j
is also set to 4, we may end up with 16 parallel make processes
in the worst case.
You get maximum build performance, if you set the package build
jobs to the number of CPUs (cores) available and also start the main
make process with -jX, where X is the number of CPUs (cores).
However, make sure you have enough RAM available for
NR_CPUS to the power of two (NR_CPUS^2) make jobs.
If you are unsure, select N.
config PKG_BUILD_JOBS
int
prompt "Number of package submake jobs (2-512)"
range 2 512
default 2
depends on PKG_BUILD_PARALLEL
help
The number of jobs (-jX) to pass to packages submake.
comment "Stripping options"
choice

2
include/package-defaults.mk
View file

@ -113,7 +113,7 @@ MAKE_PATH = .
define Build/Compile/Default
$(MAKE_VARS) \
$(MAKE) -C $(PKG_BUILD_DIR)/$(MAKE_PATH) \
$(MAKE) $(PKG_JOBS) -C $(PKG_BUILD_DIR)/$(MAKE_PATH) \
$(MAKE_FLAGS) \
$(1);
endef

2
include/package.mk
View file

@ -10,6 +10,8 @@ all: $(if $(DUMP),dumpinfo,compile)
PKG_BUILD_DIR ?= $(BUILD_DIR)/$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
PKG_INSTALL_DIR ?= $(PKG_BUILD_DIR)/ipkg-install
PKG_MD5SUM ?= unknown
PKG_BUILD_PARALLEL ?=
PKG_JOBS ?= $(if $(PKG_BUILD_PARALLEL),$(if $(CONFIG_PKG_BUILD_PARALLEL),-j$(CONFIG_PKG_BUILD_JOBS)))
include $(INCLUDE_DIR)/prereq.mk
include $(INCLUDE_DIR)/host.mk