Commit 02f71aab authored by "Steven J. Hill"'s avatar "Steven J. Hill"
Browse files

Support building using an external toolchain. Questions to the mailing list... 

Support building using an external toolchain. Questions to the mailing list and all other comments to <biteme@devnull.com>.
parent 4cdc4206

Makefile

+4 −0
Original line number Diff line number Diff line
@@ -44,7 +44,11 @@ ifeq ($(strip $(BR2_HAVE_DOT_CONFIG)),y) 
# along with the packages to build for the target.

#

##############################################################

ifeq ($(BR2_TOOLCHAIN_BUILDROOT),y)

TARGETS:=uclibc-configured binutils gcc uclibc-target-utils

else

TARGETS:=uclibc

endif

include toolchain/Makefile.in

include package/Makefile.in

package/Makefile.in

+20 −1
Original line number Diff line number Diff line
@@ -19,7 +19,12 @@ TAR_OPTIONS=$(subst ",, $(BR2_TAR_OPTIONS)) -xf 
#")





ifeq ($(BR2_TOOLCHAIN_BUILDROOT),y)

TARGET_CFLAGS=$(TARGET_OPTIMIZATION) $(TARGET_DEBUGGING)

else

TARGET_CFLAGS=$(TARGET_OPTIMIZATION) $(TARGET_DEBUGGING) -I$(STAGING_DIR)/include -I$(TOOLCHAIN_EXTERNAL_PATH)/$(TOOLCHAIN_EXTERNAL_PREFIX)/include

TARGET_LDFLAGS=-L$(STAGING_DIR)/lib -L$(STAGING_DIR)/usr/lib

endif

HOSTCC:=gcc

HOSTCXX:=g++
@@ -44,13 +49,14 @@ endif 
#PATCH_DIR=$(BASE_DIR)/sources/patches

BUILD_DIR:=$(BASE_DIR)/$(TOPDIR_PREFIX)build_$(ARCH)$(ARCH_FPU_SUFFIX)$(TOPDIR_SUFFIX)

TARGET_DIR:=$(BUILD_DIR)/root

TOOL_BUILD_DIR=$(BASE_DIR)/$(TOPDIR_PREFIX)toolchain_build_$(ARCH)$(ARCH_FPU_SUFFIX)$(TOPDIR_SUFFIX)



GNU_TARGET_SUFFIX:=-$(strip $(subst ",, $(BR2_GNU_TARGET_SUFFIX)))

#"))



STAGING_DIR:=$(strip $(subst ",, $(BR2_STAGING_DIR)))

#"))

ifeq ($(BR2_TOOLCHAIN_BUILDROOT),y)

TOOL_BUILD_DIR=$(BASE_DIR)/$(TOPDIR_PREFIX)toolchain_build_$(ARCH)$(ARCH_FPU_SUFFIX)$(TOPDIR_SUFFIX)



# Quotes are needed for spaces et al in path components.

TARGET_PATH="$(STAGING_DIR)/bin:$(TOOL_BUILD_DIR)/bin:$(PATH)"
@@ -59,6 +65,19 @@ REAL_GNU_TARGET_NAME=$(OPTIMIZE_FOR_CPU)$(GNU_TARGET_SUFFIX) 
GNU_TARGET_NAME=$(OPTIMIZE_FOR_CPU)-linux

KERNEL_CROSS=$(STAGING_DIR)/bin/$(OPTIMIZE_FOR_CPU)$(GNU_TARGET_SUFFIX)-

TARGET_CROSS=$(STAGING_DIR)/bin/$(OPTIMIZE_FOR_CPU)$(GNU_TARGET_SUFFIX)-

else

TOOLCHAIN_EXTERNAL_PREFIX:=$(strip $(subst ",, $(BR2_TOOLCHAIN_EXTERNAL_PREFIX)))

#"))

TOOLCHAIN_EXTERNAL_PATH:=$(strip $(subst ",, $(BR2_TOOLCHAIN_EXTERNAL_PATH)))

#"))

TOOL_BUILD_DIR=$(BASE_DIR)/$(TOPDIR_PREFIX)toolchain_build_$(TOOLCHAIN_EXTERNAL_PREFIX)

TARGET_PATH="$(STAGING_DIR)/bin:$(TOOL_BUILD_DIR)/bin:$(TOOLCHAIN_EXTERNAL_PATH)/bin:$(PATH)"

IMAGE:=$(BASE_DIR)/rootfs.$(TOOLCHAIN_EXTERNAL_PREFIX)

REAL_GNU_TARGET_NAME=$(TOOLCHAIN_EXTERNAL_PREFIX)

GNU_TARGET_NAME=$(TOOLCHAIN_EXTERNAL_PREFIX)

KERNEL_CROSS=$(TOOLCHAIN_EXTERNAL_PATH)/bin/$(TOOLCHAIN_EXTERNAL_PREFIX)-

TARGET_CROSS=$(TOOLCHAIN_EXTERNAL_PATH)/bin/$(TOOLCHAIN_EXTERNAL_PREFIX)-

endif

TARGET_CC=$(TARGET_CROSS)gcc

TARGET_CXX=$(TARGET_CROSS)g++

TARGET_RANLIB=$(TARGET_CROSS)ranlib

target/Makefile.in

+3 −0
Original line number Diff line number Diff line
@@ -7,4 +7,7 @@ include target/powerpc/Makefile.in 
# and finally build the filesystems/tarballs

include target/*/*.mk

# kernel rules

ifeq ($(BR2_PACKAGE_LINUX),y)

TARGETS+=linux26

endif

include target/linux*.mk

target/device/Makefile.in

+0 −3
Original line number Diff line number Diff line 
TARGET_DEVICE_DEPMOD:=target/device/x86/depmod.pl



-include target/device/*/Makefile.in
 
ifeq ($(BR2_PACKAGE_LINUX),y)

TARGETS+=linux26

endif

toolchain/Config.in

+14 −61
Original line number Diff line number Diff line 
#



menu "Toolchain Options"





source "toolchain/kernel-headers/Config.in"

source "toolchain/uClibc/Config.in"

source "toolchain/binutils/Config.in"

source "toolchain/gcc/Config.in"

source "toolchain/ccache/Config.in"

source "toolchain/gdb/Config.in"

source "toolchain/elf2flt/Config.in"

source "toolchain/mklibs/Config.in"



comment "Common Toolchain Options"



source "toolchain/sstrip/Config.in"



config BR2_ENABLE_MULTILIB

	bool "Enable multilib support?"

	default n

	help

	    If you want multilib enabled, enable this...



config BR2_LARGEFILE

	bool "Enable large file (files > 2 GB) support?"

	depends on !BR2_cris

	default y

	help

	    Enable large file (files > 2 GB) support



config BR2_SOFT_FLOAT

	bool "Use software floating point by default"

	default n

	depends on BR2_arm || BR2_armeb || BR2_mips || BR2_mipsel || BR2_powerpc

	help

	  If your target CPU does not have a Floating Point Unit (FPU) or a

	  kernel FPU emulator, but you still wish to support floating point

	  functions, then everything will need to be compiled with soft

	  floating point support (-msoft-float).



	  Most people will answer N.



#config BR2_SOFT_FLOAT_FP

#	bool "Use softfp"

#	default n



config BR2_TARGET_OPTIMIZATION

	string "Target Optimizations"

	default "-Os -pipe"

	help

	  Optimizations to use when building for the target host.



config BR2_CROSS_TOOLCHAIN_TARGET_UTILS

	bool "Include target utils in cross toolchain"

	default y

choice

	prompt "Toolchain type"

	default BR2_TOOLCHAIN_BUILDROOT

	help

	  When using buildroot to build a deployable cross toolchain,

	  it is handy to include certain target apps with that toolchain

	  as a convenience.

	  Examples include ldd, gdbserver, and strace.

	  Select whether to use the toolchain built by the buildroot

	  system or an external pre-built toolchain.



	  Answer Y if you want these apps (if built) copied into the

	  cross toolchain dir under <arch>-linux-uclibc/target_utils/.

config BR2_TOOLCHAIN_BUILDROOT

	bool

	prompt "Buildroot toolchain"



endmenu

config BR2_TOOLCHAIN_EXTERNAL

	bool

	prompt " External toolchain"

endchoice



source "toolchain/Config.in.2"

source "toolchain/external-toolchain/Config.in"