Merge branch 'external-toolchain' of git://git.busybox.net/~tpetazzoni/git/buildroot
This commit is contained in:
Peter Korsgaard
commit
ad0ccbcf30
@ -1,24 +1,52 @@
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#
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# copy_toolchain_lib_root
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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.
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#
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# $1: source
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# $2: destination
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# $3: strip (y|n) default is to strip
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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: sysroot directory
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# $2: library name
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# $3: destination directory
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# $4: strip (y|n), default is to strip
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#
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copy_toolchain_lib_root = \
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LIB="$(strip $1)"; \
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DST="$(strip $2)"; \
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STRIP="$(strip $3)"; \
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SYSROOT_DIR="$(strip $1)"; \
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LIB="$(strip $2)"; \
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DST="$(strip $3)"; \
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STRIP="$(strip $4)"; \
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\
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LIB_DIR=`$(TARGET_CC) -print-file-name=$${LIB} | sed -e "s,$${LIB}\$$,,"`; \
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\
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if test -z "$${LIB_DIR}"; then \
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echo "copy_toolchain_lib_root: lib=$${LIB} not found"; \
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exit -1; \
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fi; \
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\
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LIB="$(strip $1)"; \
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for FILE in `find $${LIB_DIR} -maxdepth 1 -type l -name "$${LIB}*"`; do \
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LIB_DIR="$${SYSROOT_DIR}/lib" ; \
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for FILE in `find $${LIB_DIR} -maxdepth 1 -name "$${LIB}.*"`; do \
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LIB=`basename $${FILE}`; \
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while test \! -z "$${LIB}"; do \
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rm -fr $(TARGET_DIR)$${DST}/$${LIB}; \
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@ -43,44 +71,62 @@ copy_toolchain_lib_root = \
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\
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echo -n
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#
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# Copy the full external toolchain sysroot directory to the staging
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# dir
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#
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# $1: sysroot directory
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#
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copy_toolchain_sysroot = \
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SYSROOT_DIR=`$(TARGET_CC) -v 2>&1 | grep ^Configured | tr " " "\n" | grep -- "--with-sysroot" | cut -f2 -d=`; \
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if [ -n "$${SYSROOT_DIR}" ]; then cp -a $${SYSROOT_DIR}/* $(STAGING_DIR)/ ; \
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find $(STAGING_DIR) -type d | xargs chmod 755; fi
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SYSROOT_DIR="$(strip $1)"; \
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cp -a $${SYSROOT_DIR}/* $(STAGING_DIR)/ ; \
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find $(STAGING_DIR) -type d | xargs chmod 755
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ifeq ($(BR2_TOOLCHAIN_EXTERNAL_UCLIBC),y)
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EXTERNAL_LIBC=libc.so.0
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EXTERNAL_LIBS=ld-uClibc.so.0 libcrypt.so.0 libdl.so.0 libgcc_s.so libm.so.0 libnsl.so.0 libpthread.so.0 libresolv.so.0 librt.so.0 libutil.so.0
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else
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EXTERNAL_LIBC=libc.so.6
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EXTERNAL_LIBS=ld-linux.so.3 libcrypt.so.1 libdl.so.2 libgcc_s.so.1 libm.so.6 libnsl.so.1 libpthread.so.0 libresolv.so.2 librt.so.1 libutil.so.1 libnss_files.so.2
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endif
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check_clibrary = \
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if ! test -f `$(TARGET_CC) -print-file-name=$(EXTERNAL_LIBC)` ; 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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# 1: Buildroot option name
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# 2: message
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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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# 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: message
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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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@ -92,8 +138,22 @@ check_uclibc_feature = \
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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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# $1: sysroot directory
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#
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check_uclibc = \
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SYSROOT_DIR=`$(TARGET_CC) -v 2>&1 | grep ^Configured | tr " " "\n" | grep -- "--with-sysroot" | cut -f2 -d=`; \
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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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@ -101,21 +161,70 @@ check_uclibc = \
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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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uclibc: dependencies $(TARGET_DIR)/lib/$(EXTERNAL_LIBC)
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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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$(TARGET_DIR)/lib/$(EXTERNAL_LIBC):
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@echo "Checking external toolchain settings"
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@$(call check_clibrary)
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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 $(STAMP_DIR)/ext-toolchain-installed
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EXTERNAL_LIBS=libc.so libcrypt.so libdl.so libgcc_s.so libm.so libnsl.so libpthread.so libresolv.so librt.so libutil.so
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ifeq ($(BR2_TOOLCHAIN_EXTERNAL_UCLIBC),y)
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@$(call check_uclibc)
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EXTERNAL_LIBS+=ld-uClibc.so
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else
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@$(call check_glibc)
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EXTERNAL_LIBS+=ld-linux.so libnss_files.so
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endif
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ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
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EXTERNAL_LIBS+=libstdc++.so
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endif
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SYSROOT_DIR=$(shell LANG=C $(TARGET_CC) -v 2>&1 | grep ^Configured | tr " " "\n" | grep -- "--with-sysroot" | cut -f2 -d=)
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$(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 ($(BR2_TOOLCHAIN_EXTERNAL_UCLIBC),y)
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$(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 $(TARGET_DIR)/lib
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@echo "Copy external toolchain libraries to target..."
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@$(call copy_toolchain_lib_root, $(EXTERNAL_LIBC), /lib, $(BR2_TOOLCHAIN_EXTERNAL_STRIP))
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@for libs in $(EXTERNAL_LIBS); do \
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$(call copy_toolchain_lib_root, $$libs, /lib, $(BR2_TOOLCHAIN_EXTERNAL_STRIP)); \
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$(Q)for libs in $(EXTERNAL_LIBS); do \
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$(call copy_toolchain_lib_root,$(SYSROOT_DIR),$$libs,/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)
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$(Q)$(call copy_toolchain_sysroot,$(SYSROOT_DIR))
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@touch $@
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