6c492d5e7b
Instead of letting the user define all the details of his external toolchain, we define a set of profiles for well-known external toolchains (CodeSourcery ones only at the moment, can easily be extended with other toolchains). Once a profile has been choosen, the user is offered the choice of either letting Buildroot download and install the external toolchain, or (as before) to tell Buildroot where the toolchain is installed on the system. We of course provide a "custom profile", through which the user can configure Buildroot to use a custom external toolchain for which no profile is available. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
198 lines
9.1 KiB
Makefile
198 lines
9.1 KiB
Makefile
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#
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# This file implements the support for external toolchains, i.e
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# toolchains that have not been produced by Buildroot itself and that
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# Buildroot can download from the Web or that are already available on
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# the system on which Buildroot runs. So far, we have tested this
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# with:
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#
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# * Toolchains generated by Crosstool-NG
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# * Toolchains generated by Buildroot
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# * ARM, MIPS and PowerPC toolchains made available by
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# Codesourcery. For the MIPS toolchain, the -muclibc variant isn't
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# supported yet, only the default glibc-based variant is.
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#
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# The basic principle is the following
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#
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# 1. a. For toolchains downloaded from the Web, Buildroot already
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# knows their configuration, so it just downloads them and extract
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# them in $(TOOLCHAIN_EXTERNAL_DIR).
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#
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# 1. b. For pre-installed toolchains, perform some checks on the
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# conformity between the toolchain configuration described in the
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# Buildroot menuconfig system, and the real configuration of the
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# external toolchain. This is for example important to make sure that
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# the Buildroot configuration system knows whether the toolchain
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# supports RPC, IPv6, locales, large files, etc. Unfortunately, these
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# things cannot be detected automatically, since the value of these
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# options (such as BR2_INET_RPC) are needed at configuration time
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# because these options are used as dependencies for other
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# options. And at configuration time, we are not able to retrieve the
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# external toolchain configuration.
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#
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# 2. Copy the libraries needed at runtime to the target directory,
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# $(TARGET_DIR). Obviously, things such as the C library, the dynamic
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# loader and a few other utility libraries are needed if dynamic
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# applications are to be executed on the target system.
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#
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# 3. Copy the libraries and headers to the staging directory. This
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# will allow all further calls to gcc to be made using --sysroot
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# $(STAGING_DIR), which greatly simplifies the compilation of the
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# packages when using external toolchains. So in the end, only the
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# cross-compiler binaries remains external, all libraries and headers
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# are imported into the Buildroot tree.
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uclibc: dependencies $(STAMP_DIR)/ext-toolchain-installed
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LIB_EXTERNAL_LIBS=ld*.so libc.so libcrypt.so libdl.so libgcc_s.so libm.so libnsl.so libresolv.so librt.so libutil.so
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ifeq ($(BR2_TOOLCHAIN_EXTERNAL_GLIBC),y)
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LIB_EXTERNAL_LIBS+=libnss_files.so libnss_dns.so
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endif
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ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
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USR_LIB_EXTERNAL_LIBS+=libstdc++.so
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endif
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ifneq ($(BR2_PTHREADS_NONE),y)
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LIB_EXTERNAL_LIBS+=libpthread.so
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ifeq ($(BR2_PACKAGE_GDB_SERVER),y)
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LIB_EXTERNAL_LIBS+=libthread_db.so
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endif # gdbserver
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endif # ! no threads
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# Details about sysroot directory selection.
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#
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# To find the sysroot directory:
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#
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# * We first try the -print-sysroot option, available in gcc 4.4.x
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# and in some Codesourcery toolchains.
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#
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# * If this option is not available, we fallback to the value of
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# --with-sysroot as visible in CROSS-gcc -v.
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#
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# When doing those tests, we don't pass any option to gcc that could
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# select a multilib variant (such as -march) as we want the "main"
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# sysroot, which contains all variants of the C library in the case of
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# multilib toolchains. We use the TARGET_CC_NO_SYSROOT variable, which
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# is the path of the cross-compiler, without the
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# --sysroot=$(STAGING_DIR), since what we want to find is the location
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# of the original toolchain sysroot. This "main" sysroot directory is
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# stored in SYSROOT_DIR.
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#
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# Then, multilib toolchains are a little bit more complicated, since
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# they in fact have multiple sysroots, one for each variant supported
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# by the toolchain. So we need to find the particular sysroot we're
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# interested in.
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#
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# To do so, we ask the compiler where its sysroot is by passing all
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# flags (including -march and al.), except the --sysroot flag since we
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# want to the compiler to tell us where its original sysroot
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# is. ARCH_SUBDIR will contain the subdirectory, in the main
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# SYSROOT_DIR, that corresponds to the selected architecture
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# variant. ARCH_SYSROOT_DIR will contain the full path to this
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# location.
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#
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# One might wonder why we don't just bother with ARCH_SYSROOT_DIR. The
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# fact is that in multilib toolchains, the header files are often only
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# present in the main sysroot, and only the libraries are available in
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# each variant-specific sysroot directory.
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TARGET_CC_NO_SYSROOT=$(filter-out --sysroot=%,$(TARGET_CC_NOCCACHE))
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ifeq ($(BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD),y)
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TOOLCHAIN_EXTERNAL_DEPENDENCIES = $(TOOLCHAIN_EXTERNAL_DIR)/.extracted
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else
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TOOLCHAIN_EXTERNAL_DEPENDENCIES = $(STAMP_DIR)/ext-toolchain-checked
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endif
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ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_ARM2009Q1),y)
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TOOLCHAIN_EXTERNAL_SITE=http://www.codesourcery.com/sgpp/lite/arm/portal/package5383/public/arm-none-linux-gnueabi/
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TOOLCHAIN_EXTERNAL_SOURCE=arm-2009q3-67-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2
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else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_ARM2010Q1),y)
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TOOLCHAIN_EXTERNAL_SITE=http://www.codesourcery.com/sgpp/lite/arm/portal/package6488/public/arm-none-linux-gnueabi/
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TOOLCHAIN_EXTERNAL_SOURCE=arm-2010q1-202-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2
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else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_ARM201009),y)
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TOOLCHAIN_EXTERNAL_SITE=http://www.codesourcery.com/sgpp/lite/arm/portal/package7851/public/arm-none-linux-gnueabi/
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TOOLCHAIN_EXTERNAL_SOURCE=arm-2010.09-50-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2
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else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS44),y)
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TOOLCHAIN_EXTERNAL_SITE=http://www.codesourcery.com/sgpp/lite/mips/portal/package7401/public/mips-linux-gnu/
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TOOLCHAIN_EXTERNAL_SOURCE=mips-4.4-303-mips-linux-gnu-i686-pc-linux-gnu.tar.bz2
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else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_POWERPC201009),y)
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TOOLCHAIN_EXTERNAL_SITE=http://www.codesourcery.com/sgpp/lite/power/portal/package7703/public/powerpc-linux-gnu/
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TOOLCHAIN_EXTERNAL_SOURCE=freescale-2010.09-55-powerpc-linux-gnu-i686-pc-linux-gnu.tar.bz2
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else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_SH201009),y)
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TOOLCHAIN_EXTERNAL_SITE=http://www.codesourcery.com/sgpp/lite/superh/portal/package7783/public/sh-linux-gnu/
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TOOLCHAIN_EXTERNAL_SOURCE=renesas-2010.09-45-sh-linux-gnu-i686-pc-linux-gnu.tar.bz2
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else
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# A value must be set (even if unused), otherwise the
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# $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE) rule would override the main
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# $(DL_DIR) rule
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TOOLCHAIN_EXTERNAL_SOURCE=none
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endif
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# Download and extraction of a toolchain
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$(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE):
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$(call DOWNLOAD,$(TOOLCHAIN_EXTERNAL_SITE),$(TOOLCHAIN_EXTERNAL_SOURCE))
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$(TOOLCHAIN_EXTERNAL_DIR)/.extracted: $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE)
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mkdir -p $(@D)
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$(INFLATE$(suffix $(TOOLCHAIN_EXTERNAL_SOURCE))) $^ | $(TAR) $(TAR_STRIP_COMPONENTS)=1 -C $(@D) $(TAR_OPTIONS) -
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touch $@
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# Checks for an already installed toolchain: check the toolchain
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# location, check that it supports sysroot, and then verify that it
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# matches the configuration provided in Buildroot: ABI, C++ support,
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# type of C library and all C library features.
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$(STAMP_DIR)/ext-toolchain-checked:
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@echo "Checking external toolchain settings"
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$(Q)$(call check_cross_compiler_exists)
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$(Q)SYSROOT_DIR=`$(TARGET_CC_NO_SYSROOT) -print-sysroot 2>/dev/null` ; \
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if test -z "$${SYSROOT_DIR}" ; then \
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SYSROOT_DIR=`readlink -f $$(LANG=C $(TARGET_CC_NO_SYSROOT) -print-file-name=libc.a) |sed -r -e 's:usr/lib/libc\.a::;'` ; \
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fi ; \
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if test -z "$${SYSROOT_DIR}" ; then \
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@echo "External toolchain doesn't support --sysroot. Cannot use." ; \
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exit 1 ; \
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fi ; \
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if test x$(BR2_arm) == x"y" ; then \
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$(call check_arm_abi) ; \
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fi ; \
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if test x$(BR2_INSTALL_LIBSTDCPP) == x"y" ; then \
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$(call check_cplusplus) ; \
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fi ; \
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if test x$(BR2_TOOLCHAIN_EXTERNAL_UCLIBC) == x"y" ; then \
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$(call check_uclibc,$${SYSROOT_DIR}) ; \
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else \
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$(call check_glibc,$${SYSROOT_DIR}) ; \
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fi
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# Integration of the toolchain into Buildroot: find the main sysroot
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# and the variant-specific sysroot, then copy the needed libraries to
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# the $(TARGET_DIR) and copy the whole sysroot (libraries and headers)
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# to $(STAGING_DIR).
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$(STAMP_DIR)/ext-toolchain-installed: $(TOOLCHAIN_EXTERNAL_DEPENDENCIES)
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$(Q)SYSROOT_DIR=`$(TARGET_CC_NO_SYSROOT) -print-sysroot 2>/dev/null` ; \
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if test -z "$${SYSROOT_DIR}" ; then \
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SYSROOT_DIR=`readlink -f $$(LANG=C $(TARGET_CC_NO_SYSROOT) -print-file-name=libc.a) |sed -r -e 's:usr/lib/libc\.a::;'` ; \
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fi ; \
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if test -z "$${SYSROOT_DIR}" ; then \
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@echo "External toolchain doesn't support --sysroot. Cannot use." ; \
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exit 1 ; \
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fi ; \
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ARCH_SUBDIR=`$(TARGET_CC_NO_SYSROOT) $(TARGET_CFLAGS) -print-multi-directory` ; \
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ARCH_SYSROOT_DIR=$${SYSROOT_DIR}/$${ARCH_SUBDIR} ; \
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mkdir -p $(TARGET_DIR)/lib ; \
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echo "Copy external toolchain libraries to target..." ; \
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for libs in $(LIB_EXTERNAL_LIBS); do \
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$(call copy_toolchain_lib_root,$${ARCH_SYSROOT_DIR},$$libs,/lib,$(BR2_TOOLCHAIN_EXTERNAL_STRIP)); \
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done ; \
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for libs in $(USR_LIB_EXTERNAL_LIBS); do \
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$(call copy_toolchain_lib_root,$${ARCH_SYSROOT_DIR},$$libs,/usr/lib,$(BR2_TOOLCHAIN_EXTERNAL_STRIP)); \
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done ; \
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echo "Copy external toolchain sysroot to staging..." ; \
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$(call copy_toolchain_sysroot,$${SYSROOT_DIR},$${ARCH_SYSROOT_DIR},$${ARCH_SUBDIR}) ; \
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if [ -L $${ARCH_SYSROOT_DIR}/lib64 ] ; then \
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$(call create_lib64_symlinks) ; \
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fi ; \
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touch $@
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