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

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This commit is contained in:
"Steven J. Hill" 2007-02-06 18:19:38 +00:00
parent 4cdc420621
commit 02f71aab47
10 changed files with 292 additions and 65 deletions
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4
Makefile
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@ -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

21
package/Makefile.in
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@ -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

3
target/Makefile.in
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@ -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

3
target/device/Makefile.in
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@ -1,6 +1,3 @@
TARGET_DEVICE_DEPMOD:=target/device/x86/depmod.pl
-include target/device/*/Makefile.in
ifeq ($(BR2_PACKAGE_LINUX),y)
TARGETS+=linux26
endif

75
toolchain/Config.in
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@ -1,67 +1,20 @@
#
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
choice
prompt "Toolchain type"
default BR2_TOOLCHAIN_BUILDROOT
help
If you want multilib enabled, enable this...
Select whether to use the toolchain built by the buildroot
system or an external pre-built toolchain.
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_TOOLCHAIN_BUILDROOT
bool
prompt "Buildroot toolchain"
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
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.
Answer Y if you want these apps (if built) copied into the
cross toolchain dir under <arch>-linux-uclibc/target_utils/.
endmenu
config BR2_TOOLCHAIN_EXTERNAL
bool
prompt " External toolchain"
endchoice
source "toolchain/Config.in.2"
source "toolchain/external-toolchain/Config.in"

66
toolchain/Config.in.2 Normal file
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@ -0,0 +1,66 @@
#
menu "Toolchain Options"
depends on BR2_TOOLCHAIN_BUILDROOT
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
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.
Answer Y if you want these apps (if built) copied into the
cross toolchain dir under <arch>-linux-uclibc/target_utils/.
endmenu

72
toolchain/external-toolchain/Config.in Normal file
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@ -0,0 +1,72 @@
#
menu "Toolchain Options"
depends on BR2_TOOLCHAIN_EXTERNAL
config BR2_TOOLCHAIN_EXTERNAL_LIB_C
string "The core C library from the external toolchain"
default "libc.so.6"
help
Specify the core C shared library found in the external
toolchain. This is required in addition to any other
libraries to be copied.
config BR2_TOOLCHAIN_EXTERNAL_LIBS
string "Libraries to copy from the external toolchain"
default ""
help
A space separated list of the shared libraries to be copied
from the external toolchain into the root filesystem. Only
the top-level name is needed, i.e. libc.so, libpthread.so as
the actual shared library symlinked to will be copied also.
config BR2_TOOLCHAIN_EXTERNAL_STRIP
bool
default y
prompt "Strip shared libraries"
help
Strip shared libraries copied from the external toolchain.
source "toolchain/gdb/Config.in.2"
comment "Common Toolchain Options"
config BR2_TOOLCHAIN_EXTERNAL_PATH
string "External toolchain path"
default ""
help
Path to where the external toolchain is installed.
config BR2_TOOLCHAIN_EXTERNAL_PREFIX
string "External toolchain prefix"
default ""
help
This the the external toolchain prefix. For example:
armeb-unknown-linux-gnu, mipsel-unknown-linux-gnu, etc.
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_TARGET_OPTIMIZATION
string "Target Optimizations"
default "-Os -pipe"
help
Optimizations to use when building for the target host.
endmenu

56
toolchain/external-toolchain/ext-tool.mk Normal file
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@ -0,0 +1,56 @@
#
# copy_toolchain_lib_root
#
# $1: source
# $2: destination
# $2: strip (y|n) default is to strip
#
copy_toolchain_lib_root = \
LIB="$(strip $1)"; \
DST="$(strip $2)"; \
STRIP="$(strip $3)"; \
\
LIB_DIR=`$(TARGET_CC) -print-file-name=$${LIB} | sed -e "s,/$${LIB}\$$,,"`; \
\
if test -z "$${LIB_DIR}"; then \
echo "copy_toolchain_lib_root: lib=$${LIB} not found"; \
exit -1; \
fi; \
\
LIB="$(strip $1)"; \
for FILE in `find $${LIB_DIR} -type l -name "$${LIB}*" -maxdepth 1`; do \
LIB=`basename $${FILE}`; \
while test \! -z "$${LIB}"; do \
echo "copy_toolchain_lib_root lib=$${LIB} dst=$${DST}"; \
rm -fr $(TARGET_DIR)$${DST}/$${LIB}; \
mkdir -p $(TARGET_DIR)$${DST}; \
if test -h $${LIB_DIR}/$${LIB}; then \
cp -d $${LIB_DIR}/$${LIB} $(TARGET_DIR)$${DST}/; \
elif test -f $${LIB_DIR}/$${LIB}; then \
cp $${LIB_DIR}/$${LIB} $(TARGET_DIR)$${DST}/$${LIB}; \
case "$${STRIP}" in \
(0 | n | no) \
;; \
(*) \
$(TARGET_CROSS)strip "$(TARGET_DIR)$${DST}/$${LIB}"; \
;; \
esac; \
else \
exit -1; \
fi; \
LIB="`readlink $${LIB_DIR}/$${LIB}`"; \
done; \
done; \
\
echo -n
uclibc: dependencies $(TARGET_DIR)/lib/$(strip $(subst ",, $(BR2_TOOLCHAIN_EXTERNAL_LIB_C)))
$(TARGET_DIR)/lib/$(strip $(subst ",, $(BR2_TOOLCHAIN_EXTERNAL_LIB_C))):
#"))
mkdir -p $(TARGET_DIR)/lib
@$(call copy_toolchain_lib_root, $(strip $(subst ",, $(BR2_TOOLCHAIN_EXTERNAL_LIB_C))), /lib, $(BR2_TOOLCHAIN_EXTERNAL_STRIP))
#")))
for libs in $(strip $(subst ",, $(BR2_TOOLCHAIN_EXTERNAL_LIBS))) ; do \
$(call copy_toolchain_lib_root, $$libs, /lib, $(BR2_TOOLCHAIN_EXTERNAL_STRIP)) ; \
done

55
toolchain/gdb/Config.in.2 Normal file
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@ -0,0 +1,55 @@
# Keep this in sync with Config.in
comment "Gdb Options"
config BR2_PACKAGE_GDB
bool "Build gdb debugger for the Target"
default n
select BR2_PACKAGE_NCURSES
help
Build the full gdb debugger to run on the target.
config BR2_PACKAGE_GDB_SERVER
bool "Build gdb server for the Target"
default n
help
Build the gdbserver stub to run on the target.
A full gdb is needed to debug the progam.
config BR2_PACKAGE_GDB_HOST
bool "Build gdb for the Host"
default n
help
Build gdb to run on the host to debug programs run on the target.
choice
prompt "GDB debugger Version"
default BR2_GDB_VERSION_6_3
depends on BR2_PACKAGE_GDB || BR2_PACKAGE_GDB_SERVER || BR2_PACKAGE_GDB_HOST
help
Select the version of gdb you wish to use.
config BR2_EXT_GDB_VERSION_6_2_1
bool "gdb 6.2.1"
config BR2_EXT_GDB_VERSION_6_3
bool "gdb 6.3"
config BR2_EXT_GDB_VERSION_6_4
bool "gdb 6.4"
config BR2_EXT_GDB_VERSION_6_5
bool "gdb 6.5"
config BR2_EXT_GDB_VERSION_SNAPSHOT
bool "gdb snapshot"
endchoice
config BR2_EXT_GDB_VERSION
string
default "6.2.1" if BR2_EXT_GDB_VERSION_6_2_1
default "6.3" if BR2_EXT_GDB_VERSION_6_3
default "6.4" if BR2_EXT_GDB_VERSION_6_4
default "6.5" if BR2_EXT_GDB_VERSION_6_5
default "snapshot" if BR2_EXT_GDB_VERSION_SNAPSHOT

2
toolchain/uClibc/uclibc.mk
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@ -4,6 +4,7 @@
#
#############################################################
ifeq ($(BR2_TOOLCHAIN_BUILDROOT),y)
ifeq ($(BR2_UCLIBC_VERSION_SNAPSHOT),y)
# Be aware that this changes daily....
@ -339,3 +340,4 @@ uclibc_target-clean:
uclibc_target-dirclean:
rm -rf $(TARGET_DIR)/usr/include
endif