1f39e6e206
gdbserver dlopen(3)s libthread_db.so at runtime, so there is no dependency on it (does not appear as being (NEEDED)). Copy libthread_db.so from external toolchain when gdbserver is enbled. Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
323 lines
12 KiB
Makefile
323 lines
12 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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# are already available on the system on which Buildroot runs. So far,
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# we have tested this 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 toolchains made available by Codesourcery
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#
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# The basic principle is the following
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#
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# 1. Perform some checks on the conformity between the toolchain
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# configuration described in the Buildroot menuconfig system, and the
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# real configuration of the external toolchain. This is for example
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# important to make sure that the Buildroot configuration system
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# knows whether the toolchain supports RPC, IPv6, locales, large
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# files, etc. Unfortunately, these things cannot be detected
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# automatically, since the value of these options (such as
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# BR2_INET_RPC) are needed at configuration time because these
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# options are used as dependencies for other options. And at
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# configuration time, we are not able to retrieve the external
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# 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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#
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# Copy a toolchain library and its symbolic links from the sysroot
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# directory to the target directory. Also optionaly strips the
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# library.
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#
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# $1: arch specific sysroot directory
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# $2: library name
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# $3: destination directory
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# $4: strip (y|n), default is to strip
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#
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copy_toolchain_lib_root = \
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ARCH_SYSROOT_DIR="$(strip $1)"; \
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LIB="$(strip $2)"; \
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STRIP="$(strip $4)"; \
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\
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LIBS=`(cd $${ARCH_SYSROOT_DIR}; find . -path "./lib/$${LIB}.*" -o -path "./usr/lib/$${LIB}.*")` ; \
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for FILE in $${LIBS} ; do \
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LIB=`basename $${FILE}`; \
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LIBDIR=`dirname $${FILE}` ; \
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while test \! -z "$${LIB}"; do \
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FULLPATH="$${ARCH_SYSROOT_DIR}/$${LIBDIR}/$${LIB}" ; \
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rm -fr $(TARGET_DIR)/$${LIBDIR}/$${LIB}; \
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mkdir -p $(TARGET_DIR)/$${LIBDIR}; \
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if test -h $${FULLPATH} ; then \
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cp -d $${FULLPATH} $(TARGET_DIR)/$${LIBDIR}/; \
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elif test -f $${FULLPATH}; then \
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$(INSTALL) -D -m0755 $${FULLPATH} $(TARGET_DIR)/$${LIBDIR}/$${LIB}; \
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case "$${STRIP}" in \
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(0 | n | no) \
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;; \
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(*) \
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$(TARGET_CROSS)strip "$(TARGET_DIR)/$${LIBDIR}/$${LIB}"; \
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;; \
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esac; \
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else \
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exit -1; \
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fi; \
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LIB="`readlink $${FULLPATH}`"; \
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done; \
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done; \
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\
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echo -n
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#
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# Copy the full external toolchain sysroot directory to the staging
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# dir. The operation of this function is rendered a little bit
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# complicated by the support for multilib toolchains.
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#
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# We start by copying etc, lib, sbin and usr from the sysroot of the
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# selected architecture variant (as pointed by ARCH_SYSROOT_DIR). This
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# allows to import into the staging directory the C library and
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# companion libraries for the correct architecture variant. We
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# explictly only copy etc, lib, sbin and usr since other directories
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# might exist for other architecture variants (on Codesourcery
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# toolchain, the sysroot for the default architecture variant contains
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# the armv4t and thumb2 subdirectories, which are the sysroot for the
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# corresponding architecture variants), and we don't want to import
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# them.
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#
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# Then, if the selected architecture variant is not the default one
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# (i.e, if SYSROOT_DIR != ARCH_SYSROOT_DIR), then we :
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#
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# * Import the header files from the default architecture
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# variant. Header files are typically shared between the sysroots
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# for the different architecture variants. If we use the
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# non-default one, header files were not copied by the previous
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# step, so we copy them here from the sysroot of the default
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# architecture variant.
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#
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# * Create a symbolic link that matches the name of the subdirectory
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# for the architecture variant in the original sysroot. This is
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# required as the compiler will by default look in
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# sysroot_dir/arch_variant/ for libraries and headers, when the
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# non-default architecture variant is used. Without this, the
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# compiler fails to find libraries and headers.
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#
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# $1: main sysroot directory of the toolchain
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# $2: arch specific sysroot directory of the toolchain
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# $3: arch specific subdirectory in the sysroot
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#
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copy_toolchain_sysroot = \
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SYSROOT_DIR="$(strip $1)"; \
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ARCH_SYSROOT_DIR="$(strip $2)"; \
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ARCH_SUBDIR="$(strip $3)"; \
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for i in etc lib sbin usr ; do \
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cp -a $${ARCH_SYSROOT_DIR}/$$i $(STAGING_DIR)/ ; \
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done ; \
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if [ `readlink -f $${SYSROOT_DIR}` != `readlink -f $${ARCH_SYSROOT_DIR}` ] ; then \
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if [ ! -d $${ARCH_SYSROOT_DIR}/usr/include ] ; then \
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cp -a $${SYSROOT_DIR}/usr/include $(STAGING_DIR)/usr ; \
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fi ; \
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ln -s . $(STAGING_DIR)/$(ARCH_SUBDIR) ; \
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fi ; \
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find $(STAGING_DIR) -type d | xargs chmod 755
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#
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# Check the availability of a particular glibc feature. We assume that
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# all Buildroot toolchain options are supported by glibc, so we just
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# check that they are enabled.
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#
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# $1: Buildroot option name
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# $2: feature description
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#
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check_glibc_feature = \
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if [ x$($(1)) != x"y" ] ; then \
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echo "$(2) available in C library, please enable $(1)" ; \
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exit 1 ; \
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fi
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#
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# Check the correctness of a glibc external toolchain configuration.
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# 1. Check that the C library selected in Buildroot matches the one
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# of the external toolchain
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# 2. Check that all the C library-related features are enabled in the
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# config, since glibc always supports all of them
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#
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# $1: sysroot directory
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#
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check_glibc = \
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SYSROOT_DIR="$(strip $1)"; \
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if ! test -f $${SYSROOT_DIR}/lib/ld-linux.so.* ; then \
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echo "Incorrect selection of the C library"; \
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exit -1; \
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fi; \
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$(call check_glibc_feature,BR2_LARGEFILE,Large file support) ;\
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$(call check_glibc_feature,BR2_INET_IPV6,IPv6 support) ;\
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$(call check_glibc_feature,BR2_INET_RPC,RPC support) ;\
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$(call check_glibc_feature,BR2_ENABLE_LOCALE,Locale support) ;\
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$(call check_glibc_feature,BR2_USE_WCHAR,Wide char support) ;\
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$(call check_glibc_feature,BR2_PROGRAM_INVOCATION,Program invocation support)
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#
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# Check the conformity of Buildroot configuration with regard to the
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# uClibc configuration of the external toolchain, for a particular
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# feature.
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#
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# $1: uClibc macro name
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# $2: Buildroot option name
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# $3: uClibc config file
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# $4: feature description
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#
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check_uclibc_feature = \
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IS_IN_LIBC=`grep -q "\#define $(1) 1" $(3) && echo y` ; \
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if [ x$($(2)) != x"y" -a x$${IS_IN_LIBC} == x"y" ] ; then \
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echo "$(4) available in C library, please enable $(2)" ; \
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exit 1 ; \
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fi ; \
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if [ x$($(2)) == x"y" -a x$${IS_IN_LIBC} != x"y" ] ; then \
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echo "$(4) not available in C library, please disable $(2)" ; \
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exit 1 ; \
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fi
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#
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# Check the correctness of a uclibc external toolchain configuration
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# 1. Check that the C library selected in Buildroot matches the one
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# of the external toolchain
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# 2. Check that the features enabled in the Buildroot configuration
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# match the features available in the uClibc of the external
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# toolchain
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#
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# $1: sysroot directory
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#
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check_uclibc = \
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SYSROOT_DIR="$(strip $1)"; \
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if ! test -f $${SYSROOT_DIR}/lib/ld-uClibc.so.* ; then \
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echo "Incorrect selection of the C library"; \
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exit -1; \
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fi; \
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UCLIBC_CONFIG_FILE=$${SYSROOT_DIR}/usr/include/bits/uClibc_config.h ; \
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$(call check_uclibc_feature,__UCLIBC_HAS_LFS__,BR2_LARGEFILE,$${UCLIBC_CONFIG_FILE},Large file support) ;\
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$(call check_uclibc_feature,__UCLIBC_HAS_IPV6__,BR2_INET_IPV6,$${UCLIBC_CONFIG_FILE},IPv6 support) ;\
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$(call check_uclibc_feature,__UCLIBC_HAS_RPC__,BR2_INET_RPC,$${UCLIBC_CONFIG_FILE},RPC support) ;\
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$(call check_uclibc_feature,__UCLIBC_HAS_LOCALE__,BR2_ENABLE_LOCALE,$${UCLIBC_CONFIG_FILE},Locale support) ;\
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$(call check_uclibc_feature,__UCLIBC_HAS_WCHAR__,BR2_USE_WCHAR,$${UCLIBC_CONFIG_FILE},Wide char support) ;\
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$(call check_uclibc_feature,__UCLIBC_HAS_PROGRAM_INVOCATION_NAME__,BR2_PROGRAM_INVOCATION,$${UCLIBC_CONFIG_FILE},Program invocation support) ;\
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#
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# Check that the Buildroot configuration of the ABI matches the
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# configuration of the external toolchain.
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#
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check_arm_abi = \
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EXT_TOOLCHAIN_TARGET=$(shell LANG=C $(TARGET_CC) -v 2>&1 | grep ^Target | cut -f2 -d ' ') ; \
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if echo $${EXT_TOOLCHAIN_TARGET} | grep -q 'eabi$$' ; then \
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EXT_TOOLCHAIN_ABI="eabi" ; \
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else \
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EXT_TOOLCHAIN_ABI="oabi" ; \
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fi ; \
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if [ x$(BR2_ARM_OABI) == x"y" -a $${EXT_TOOLCHAIN_ABI} == "eabi" ] ; then \
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echo "Incorrect ABI setting" ; \
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exit 1 ; \
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fi ; \
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if [ x$(BR2_ARM_EABI) == x"y" -a $${EXT_TOOLCHAIN_ABI} == "oabi" ] ; then \
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echo "Incorrect ABI setting" ; \
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exit 1 ; \
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fi ; \
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#
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# Check that the external toolchain supports C++
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#
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check_cplusplus = \
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if ! test -x $(TARGET_CXX) ; then \
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echo "BR2_INSTALL_LIBSTDCPP is selected but C++ support not available in external toolchain" ; \
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exit 1 ; \
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fi ; \
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#
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# Check that the cross-compiler given in the configuration exists
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#
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check_cross_compiler_exists = \
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if ! test -x $(TARGET_CC) ; then \
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echo "Cannot find cross-compiler $(TARGET_CC)" ; \
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exit 1 ; \
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fi ; \
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uclibc: dependencies $(STAMP_DIR)/ext-toolchain-installed
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EXTERNAL_LIBS=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_UCLIBC),y)
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EXTERNAL_LIBS+=ld-uClibc.so
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else
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EXTERNAL_LIBS+=ld-linux.so libnss_files.so libnss_dns.so
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endif
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ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
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EXTERNAL_LIBS+=libstdc++.so
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endif
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ifneq ($(BR2_PTHREADS_NONE),y)
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EXTERNAL_LIBS+=libpthread.so
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ifeq ($(BR2_PACKAGE_GDB_SERVER),y)
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EXTERNAL_LIBS+=libthread_db.so
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endif # gdbserver
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endif # ! no threads
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# SYSROOT_DIR selection. We first try the -print-sysroot option,
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# available in gcc 4.4.x and in some Codesourcery toolchains. If this
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# option is not available, we fallback to the value of --with-sysroot
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# as visible in CROSS-gcc -v. We don't pass the -march= option to gcc
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# as we want the "main" sysroot, which contains all variants of the C
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# library in the case of multilib toolchains.
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SYSROOT_DIR=$(shell $(TARGET_CC) -print-sysroot 2>/dev/null)
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ifeq ($(SYSROOT_DIR),)
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SYSROOT_DIR=$(shell readlink -f $$(LANG=C $(TARGET_CC) -print-file-name=libc.a |sed -r -e 's:usr/lib/libc\.a::;'))
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endif
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# Now, find if the toolchain specifies a sub-directory for the
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# specific architecture variant we're interested in. This is the case
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# with multilib toolchain, when the selected architecture variant is
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# not the default one. To do so, we ask the compiler by passing the
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# appropriate -march= flags. ARCH_SUBDIR will contain the
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# subdirectory, in the main SYSROOT_DIR, that corresponds to the
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# selected architecture variant. ARCH_SYSROOT_DIR will contain the
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# full path to this location.
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ifneq ($(CC_TARGET_ARCH_),)
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TARGET_CC_ARCH_CFLAGS+=-march=$(CC_TARGET_ARCH_)
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endif
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ARCH_SUBDIR=$(shell $(TARGET_CC) $(TARGET_CC_ARCH_CFLAGS) -print-multi-directory)
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ARCH_SYSROOT_DIR=$(SYSROOT_DIR)/$(ARCH_SUBDIR)
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$(STAMP_DIR)/ext-toolchain-installed:
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@echo "Checking external toolchain settings"
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$(Q)$(call check_cross_compiler_exists)
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ifeq ($(strip $(SYSROOT_DIR)),)
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@echo "External toolchain doesn't support --sysroot. Cannot use."
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exit 1
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endif
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ifeq ($(BR2_arm),y)
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$(Q)$(call check_arm_abi)
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endif
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ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
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$(Q)$(call check_cplusplus)
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endif
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ifeq ($(BR2_TOOLCHAIN_EXTERNAL_UCLIBC),y)
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$(Q)$(call check_uclibc,$(SYSROOT_DIR))
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else
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$(Q)$(call check_glibc,$(SYSROOT_DIR))
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endif
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mkdir -p $(TARGET_DIR)/lib
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@echo "Copy external toolchain libraries to target..."
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$(Q)for libs in $(EXTERNAL_LIBS); do \
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$(call copy_toolchain_lib_root,$(ARCH_SYSROOT_DIR),$$libs,$(BR2_TOOLCHAIN_EXTERNAL_STRIP)); \
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done
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@echo "Copy external toolchain sysroot to staging..."
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$(Q)$(call copy_toolchain_sysroot,$(SYSROOT_DIR),$(ARCH_SYSROOT_DIR),$(ARCH_SUBDIR))
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@touch $@
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