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buildroot/package/Makefile.in
Yann E. MORIN df8d52fb02 package-infra: limit the number of // jobs 
The current code spawns as many jobs as up to twice the number of CPUs.

On small-class machines like laptops, with a limitted amount of memory,
but still a few CPUs (real or hyperthreads), the HDD becomes a bottleneck,
and it becomes almost impossible to do anythiong else while there is a
build in progress.

Limit the number of jobs to the number of CPUs plus one.

Even on fast machines with fast HDDs, this settings keeps the machine
fully busy (for those packages that can build in parallel, of course).

For example, building qemu or the linux kernel kept my hyperthreaded
hexa Core i7 with 18GiB of RAM, busy at 99% (I never ever managed to
get 100% even with more jobs, not even 200); while on my hyperthreaded
dual Core i5 with only 4GiB and a slow HDD, I still topped at 100% CPU,
while still able to do some work involving the HDD.

If the number of processors is not available, assume one.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Nathan Lynch <ntl@pobox.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Nathan Lynch <ntl@pobox.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2013-05-11 22:49:59 +02:00

349 lines
9.7 KiB
Makefile
Raw Blame History

ifndef MAKE
MAKE:=make
endif
ifndef HOSTMAKE
HOSTMAKE=$(MAKE)
endif
HOSTMAKE :=$(shell which $(HOSTMAKE) || type -p $(HOSTMAKE) || echo make)
# If BR2_LEVEL is 0, scale the maximum concurrency with the number of
# CPUs. An additional job is used in order to keep processors busy
# while waiting on I/O.
# If the number of processors is not available, assume one.
ifeq ($(BR2_JLEVEL),0)
PARALLEL_JOBS:=$(shell echo \
$$((1 + `getconf _NPROCESSORS_ONLN 2>/dev/null || echo 1`)))
else
PARALLEL_JOBS:=$(BR2_JLEVEL)
endif
MAKE1:=$(HOSTMAKE) -j1
MAKE:=$(HOSTMAKE) -j$(PARALLEL_JOBS)
# Compute GNU_TARGET_NAME
GNU_TARGET_NAME=$(ARCH)-buildroot-linux-$(LIBC)$(ABI)
ifeq ($(BR2_TOOLCHAIN_BUILDROOT)$(BR2_TOOLCHAIN_CTNG_uClibc)$(BR2_TOOLCHAIN_EXTERNAL_UCLIBC),y)
LIBC=uclibc
else
LIBC=gnu
endif
# The ABI suffix is a bit special on ARM, as it needs to be
# -uclibcgnueabi for uClibc EABI, -uclibc for uClibc OABI, -gnueabi
# for glibc EABI and -gnu for glibc OABI. This means that the LIBC and
# ABI aren't strictly orthogonal, which explains why we need the test
# on LIBC below.
ifeq ($(BR2_ARM_EABI),y)
ifeq ($(LIBC),uclibc)
ABI=gnueabi
else
ABI=eabi
endif
endif
# For FSL PowerPC there's SPE
ifeq ($(BR2_powerpc_SPE),y)
ABI=spe
# MPC8540s are e500v1 with single precision FP
ifeq ($(BR2_powerpc_8540),y)
TARGET_ABI+=-mabi=spe -mfloat-gprs=single -Wa,-me500
endif
ifeq ($(BR2_powerpc_8548),y)
TARGET_ABI+=-mabi=spe -mfloat-gprs=double -Wa,-me500x2
endif
ifeq ($(BR2_powerpc_e500mc),y)
TARGET_ABI+=-mabi=spe -mfloat-gprs=double -Wa,-me500mc
endif
endif
# Use longcalls option for Xtensa globally.
# The 'longcalls' option allows calls across a greater range of addresses,
# and is required for some packages. While this option can degrade both
# code size and performance, the linker can usually optimize away the
# overhead when a call ends up within a certain range.
ifeq ($(BR2_xtensa),y)
TARGET_ABI += -mlongcalls
endif
STAGING_SUBDIR = usr/$(GNU_TARGET_NAME)/sysroot
STAGING_DIR = $(HOST_DIR)/$(STAGING_SUBDIR)
TARGET_OPTIMIZATION:=$(call qstrip,$(BR2_TARGET_OPTIMIZATION))
ifeq ($(BR2_OPTIMIZE_0),y)
TARGET_OPTIMIZATION+=-O0
endif
ifeq ($(BR2_OPTIMIZE_1),y)
TARGET_OPTIMIZATION+=-O1
endif
ifeq ($(BR2_OPTIMIZE_2),y)
TARGET_OPTIMIZATION+=-O2
endif
ifeq ($(BR2_OPTIMIZE_3),y)
TARGET_OPTIMIZATION+=-O3
endif
ifeq ($(BR2_OPTIMIZE_S),y)
TARGET_OPTIMIZATION+=-Os
endif
ifeq ($(BR2_DEBUG_1),y)
TARGET_DEBUGGING=-g1
endif
ifeq ($(BR2_DEBUG_2),y)
TARGET_DEBUGGING=-g2
endif
ifeq ($(BR2_DEBUG_3),y)
TARGET_DEBUGGING=-g3
endif
ifeq ($(BR2_LARGEFILE),y)
TARGET_CPPFLAGS += -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
endif
TARGET_CFLAGS = $(TARGET_CPPFLAGS) $(TARGET_ABI) $(TARGET_OPTIMIZATION) $(TARGET_DEBUGGING)
TARGET_CXXFLAGS = $(TARGET_CFLAGS)
TARGET_LDFLAGS = $(call qstrip,$(BR2_TARGET_LDFLAGS))
ifeq ($(BR2_BINFMT_FLAT),y)
TARGET_LDFLAGS += $(if $($(PKG)_FLAT_STACKSIZE),-Wl$(comma)-elf2flt=-s$($(PKG)_FLAT_STACKSIZE))
endif
ifeq ($(BR2_BINFMT_FLAT_SHARED),y)
TARGET_LDFLAGS += -mid-shared-library -mshared-library-id=0
TARGET_CFLAGS += -mid-shared-library -mshared-library-id=0
TARGET_CXXFLAGS += -mid-shared-library -mshared-library-id=0
endif
ifeq ($(BR2_BINFMT_FLAT_SEP_DATA),y)
TARGET_LDFLAGS += -msep-data
TARGET_CFLAGS += -msep-data
TARGET_CXXFLAGS += -msep-data
endif
ifeq ($(BR2_TOOLCHAIN_BUILDROOT)$(BR2_TOOLCHAIN_CTNG),y)
TARGET_CROSS=$(HOST_DIR)/usr/bin/$(GNU_TARGET_NAME)-
else
TARGET_CROSS=$(HOST_DIR)/usr/bin/$(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_PREFIX))-
endif
# Quotes are needed for spaces et al in path components.
TARGET_PATH="$(HOST_DIR)/bin:$(HOST_DIR)/usr/bin:$(HOST_DIR)/usr/sbin/:$(PATH)"
# Define TARGET_xx variables for all common binutils/gcc tools by
# including the --sysroot option where necessary.
TARGET_AR = $(TARGET_CROSS)ar
TARGET_AS = $(TARGET_CROSS)as
TARGET_CC = $(TARGET_CROSS)gcc
TARGET_CPP = $(TARGET_CROSS)cpp
TARGET_CXX = $(TARGET_CROSS)g++
TARGET_FC = $(TARGET_CROSS)gfortran
TARGET_LD = $(TARGET_CROSS)ld
TARGET_NM = $(TARGET_CROSS)nm
TARGET_RANLIB = $(TARGET_CROSS)ranlib
TARGET_READELF = $(TARGET_CROSS)readelf
TARGET_OBJCOPY = $(TARGET_CROSS)objcopy
TARGET_OBJDUMP = $(TARGET_CROSS)objdump
TARGET_CC_NOCCACHE := $(TARGET_CC)
TARGET_CXX_NOCCACHE := $(TARGET_CXX)
ifeq ($(BR2_CCACHE),y)
TARGET_CC := $(CCACHE) $(TARGET_CC)
TARGET_CXX := $(CCACHE) $(TARGET_CXX)
endif
ifeq ($(BR2_STRIP_strip),y)
STRIP_STRIP_DEBUG:=--strip-debug
STRIP_STRIP_UNNEEDED:=--strip-unneeded
STRIP_STRIP_ALL:=--strip-all
TARGET_STRIP=$(TARGET_CROSS)strip
STRIPCMD=$(TARGET_CROSS)strip --remove-section=.comment --remove-section=.note
KSTRIPCMD=$(STRIPCMD) $(STRIP_STRIP_UNNEEDED)
endif
ifeq ($(BR2_STRIP_sstrip),y)
STRIP_STRIP_DEBUG:=
STRIP_STRIP_UNNEEDED:=
STRIP_STRIP_ALL:=
TARGET_STRIP=$(HOST_DIR)/usr/bin/$(GNU_TARGET_NAME)-sstrip
STRIPCMD=$(TARGET_STRIP)
KSTRIPCMD=$(TARGET_CROSS)strip --remove-section=.comment --remove-section=.note --strip-unneeded
endif
ifeq ($(BR2_STRIP_none),y)
TARGET_STRIP=true
STRIPCMD=$(TARGET_STRIP)
KSTRIPCMD=$(TARGET_STRIP)
endif
INSTALL:=$(shell which install || type -p install)
FLEX:=$(shell which flex || type -p flex)
BISON:=$(shell which bison || type -p bison)
SED:=$(shell which sed || type -p sed) -i -e
HOST_CPPFLAGS = -I$(HOST_DIR)/usr/include
HOST_CFLAGS ?= -O2
HOST_CFLAGS += $(HOST_CPPFLAGS)
HOST_CXXFLAGS += $(HOST_CFLAGS)
HOST_LDFLAGS += -L$(HOST_DIR)/lib -L$(HOST_DIR)/usr/lib -Wl,-rpath,$(HOST_DIR)/usr/lib
HOST_PATH=$(HOST_DIR)/bin:$(HOST_DIR)/usr/bin:$(PATH)
# hostcc version as an integer - E.G. 4.3.2 => 432
HOSTCC_VERSION:=$(shell $(HOSTCC_NOCCACHE) --version | \
sed -n 's/^.* \([0-9]*\)\.\([0-9]*\)\.\([0-9]*\)[ ]*.*$$/\1\2\3/p')
TARGET_CONFIGURE_OPTS=PATH=$(TARGET_PATH) \
AR="$(TARGET_AR)" \
AS="$(TARGET_AS)" \
LD="$(TARGET_LD)" \
NM="$(TARGET_NM)" \
CC="$(TARGET_CC)" \
GCC="$(TARGET_CC)" \
CPP="$(TARGET_CPP)" \
CXX="$(TARGET_CXX)" \
FC="$(TARGET_FC)" \
RANLIB="$(TARGET_RANLIB)" \
READELF="$(TARGET_READELF)" \
STRIP="$(TARGET_STRIP)" \
OBJCOPY="$(TARGET_OBJCOPY)" \
OBJDUMP="$(TARGET_OBJDUMP)" \
AR_FOR_BUILD="$(HOSTAR)" \
AS_FOR_BUILD="$(HOSTAS)" \
CC_FOR_BUILD="$(HOSTCC)" \
GCC_FOR_BUILD="$(HOSTCC)" \
CXX_FOR_BUILD="$(HOSTCXX)" \
FC_FOR_BUILD="$(HOSTFC)" \
LD_FOR_BUILD="$(HOSTLD)" \
CPPFLAGS_FOR_BUILD="$(HOST_CPPFLAGS)" \
CFLAGS_FOR_BUILD="$(HOST_CFLAGS)" \
CXXFLAGS_FOR_BUILD="$(HOST_CXXFLAGS)" \
LDFLAGS_FOR_BUILD="$(HOST_LDFLAGS)" \
FCFLAGS_FOR_BUILD="$(HOST_FCFLAGS)" \
DEFAULT_ASSEMBLER="$(TARGET_AS)" \
DEFAULT_LINKER="$(TARGET_LD)" \
CPPFLAGS="$(TARGET_CPPFLAGS)" \
CFLAGS="$(TARGET_CFLAGS)" \
CXXFLAGS="$(TARGET_CXXFLAGS)" \
LDFLAGS="$(TARGET_LDFLAGS)" \
FCFLAGS="$(TARGET_FCFLAGS)" \
PKG_CONFIG="$(PKG_CONFIG_HOST_BINARY)" \
PERLLIB="$(HOST_DIR)/usr/lib/perl" \
STAGING_DIR="$(STAGING_DIR)"
TARGET_MAKE_ENV=PATH=$(TARGET_PATH) \
PERLLIB="$(HOST_DIR)/usr/lib/perl"
HOST_CONFIGURE_OPTS=PATH=$(HOST_PATH) \
AR="$(HOSTAR)" \
AS="$(HOSTAS)" \
LD="$(HOSTLD)" \
NM="$(HOSTNM)" \
CC="$(HOSTCC)" \
GCC="$(HOSTCC)" \
CXX="$(HOSTCXX)" \
CPP="$(HOSTCPP)" \
CPPFLAGS="$(HOST_CPPFLAGS)" \
CFLAGS="$(HOST_CFLAGS)" \
CXXFLAGS="$(HOST_CXXFLAGS)" \
LDFLAGS="$(HOST_LDFLAGS)" \
PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 \
PKG_CONFIG_ALLOW_SYSTEM_LIBS=1 \
PKG_CONFIG="$(PKG_CONFIG_HOST_BINARY)" \
PKG_CONFIG_SYSROOT_DIR="/" \
PKG_CONFIG_LIBDIR="$(HOST_DIR)/usr/lib/pkgconfig:$(HOST_DIR)/usr/share/pkgconfig" \
PERLLIB="$(HOST_DIR)/usr/lib/perl" \
LD_LIBRARY_PATH="$(HOST_DIR)/usr/lib:$(LD_LIBRARY_PATH)"
HOST_MAKE_ENV=PATH=$(HOST_PATH) \
LD_LIBRARY_PATH="$(HOST_DIR)/usr/lib:$(LD_LIBRARY_PATH)" \
PKG_CONFIG="$(PKG_CONFIG_HOST_BINARY)" \
PKG_CONFIG_SYSROOT_DIR="/" \
PKG_CONFIG_LIBDIR="$(HOST_DIR)/usr/lib/pkgconfig" \
PERLLIB="$(HOST_DIR)/usr/lib/perl"
#######################################################################
# settings we need to pass to configure
# does unaligned access trap?
BR2_AC_CV_TRAP_CHECK=ac_cv_lbl_unaligned_fail=yes
ifeq ($(BR2_i386),y)
BR2_AC_CV_TRAP_CHECK=ac_cv_lbl_unaligned_fail=no
endif
ifeq ($(BR2_x86_64),y)
BR2_AC_CV_TRAP_CHECK=ac_cv_lbl_unaligned_fail=no
endif
ifeq ($(BR2_m68k),y)
BR2_AC_CV_TRAP_CHECK=ac_cv_lbl_unaligned_fail=no
endif
ifeq ($(BR2_powerpc)$(BR2_ENDIAN),yBIG)
BR2_AC_CV_TRAP_CHECK=ac_cv_lbl_unaligned_fail=no
endif
ifeq ($(BR2_ENDIAN),"BIG")
BR2_AC_CV_C_BIGENDIAN=ac_cv_c_bigendian=yes
else
BR2_AC_CV_C_BIGENDIAN=ac_cv_c_bigendian=no
endif
TARGET_CONFIGURE_ARGS= \
$(BR2_AC_CV_TRAP_CHECK) \
ac_cv_func_mmap_fixed_mapped=yes \
ac_cv_func_memcmp_working=yes \
ac_cv_have_decl_malloc=yes \
gl_cv_func_malloc_0_nonnull=yes \
ac_cv_func_malloc_0_nonnull=yes \
ac_cv_func_calloc_0_nonnull=yes \
ac_cv_func_realloc_0_nonnull=yes \
lt_cv_sys_lib_search_path_spec="" \
$(BR2_AC_CV_C_BIGENDIAN)
#######################################################################
ifeq ($(BR2_ENABLE_LOCALE),y)
DISABLE_NLS:=
else
DISABLE_NLS:=--disable-nls
endif
ifneq ($(BR2_LARGEFILE),y)
DISABLE_LARGEFILE= --disable-largefile
endif
ifneq ($(BR2_HAVE_DOCUMENTATION),y)
# The configure option varies, but since unknown options are ignored
# we can pass all of them.
DISABLE_DOCUMENTATION = \
--disable-gtk-doc \
--disable-doc \
--disable-docs \
--disable-documentation \
--with-xmlto=no \
--with-fop=no
endif
ifeq ($(BR2_INET_IPV6),y)
DISABLE_IPV6= --enable-ipv6
else
DISABLE_IPV6= --disable-ipv6
endif
ifneq ($(BR2_INSTALL_LIBSTDCPP),y)
TARGET_CONFIGURE_OPTS+=CXX=false
endif
ifeq ($(BR2_ENABLE_DEBUG),y)
ENABLE_DEBUG:=--enable-debug
else
ENABLE_DEBUG:=
endif
ifeq ($(BR2_PREFER_STATIC_LIB),y)
SHARED_STATIC_LIBS_OPTS=--enable-static --disable-shared
TARGET_LDFLAGS += --static
else
SHARED_STATIC_LIBS_OPTS=--enable-static --enable-shared
endif
include package/pkg-utils.mk
include package/pkg-download.mk
include package/pkg-autotools.mk
include package/pkg-cmake.mk
include package/pkg-generic.mk
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