e5e5f5d868
Some packages need to know whether the MMU is in play, so add a toolchain option to expose the feature to them. [Peter: only show option on archs where it makes sense] Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
239 lines
8.8 KiB
Makefile
239 lines
8.8 KiB
Makefile
# This Makefile fragment declares helper functions, usefull to handle
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# non- buildroot-built toolchains, eg. purely external toolchains or
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# toolchains (internally) built using crosstool-NG.
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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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# Most toolchains have their libraries either in /lib or /usr/lib
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# relative to their ARCH_SYSROOT_DIR. Buildroot toolchains, however,
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# have basic libraries in /lib, and libstdc++/libgcc_s in
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# /usr/<target-name>/lib(64).
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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 of the libary, relative to $(TARGET_DIR)
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#
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copy_toolchain_lib_root = \
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ARCH_SYSROOT_DIR="$(strip $1)"; \
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LIB="$(strip $2)"; \
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DESTDIR="$(strip $3)" ; \
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\
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LIBS=`(cd $${ARCH_SYSROOT_DIR}; \
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find -L . -path "./lib/$${LIB}.*" -o \
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-path "./usr/lib/$${LIB}.*" -o \
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-path "./usr/$(TOOLCHAIN_EXTERNAL_PREFIX)/lib*/$${LIB}.*" \
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)` ; \
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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}/$${LIB}" ; \
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rm -fr $(TARGET_DIR)/$${DESTDIR}/$${LIB}; \
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mkdir -p $(TARGET_DIR)/$${DESTDIR}; \
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if test -h $${FULLPATH} ; then \
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cp -d $${FULLPATH} $(TARGET_DIR)/$${DESTDIR}/; \
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elif test -f $${FULLPATH}; then \
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$(INSTALL) -D -m0755 $${FULLPATH} $(TARGET_DIR)/$${DESTDIR}/$${LIB}; \
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else \
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exit -1; \
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fi; \
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LIB="`readlink $${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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if [ -d $${ARCH_SYSROOT_DIR}/$$i ] ; then \
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cp -a $${ARCH_SYSROOT_DIR}/$$i $(STAGING_DIR)/ ; \
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fi ; \
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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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# Create lib64 -> lib and usr/lib64 -> usr/lib symbolic links in the
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# target and staging directories. This is needed for some 64 bits
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# toolchains such as the Crosstool-NG toolchains, for which the path
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# to the dynamic loader and other libraries is /lib64, but the
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# libraries are stored in /lib.
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#
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create_lib64_symlinks = \
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(cd $(TARGET_DIR) ; ln -s lib lib64) ; \
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(cd $(TARGET_DIR)/usr ; ln -s lib lib64) ; \
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(cd $(STAGING_DIR) ; ln -s lib lib64) ; \
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(cd $(STAGING_DIR)/usr ; ln -s lib lib64)
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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.* -o -f $${SYSROOT_DIR}/lib/ld.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_MMU,MMU 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=$${SYSROOT_DIR}/usr/include/bits/uClibc_config.h ; \
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$(call check_uclibc_feature,__ARCH_USE_MMU__,BR2_USE_MMU,$${UCLIBC_CONFIG_FILE},MMU support) ;\
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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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$(call check_uclibc_feature,__UCLIBC_HAS_THREADS__,BR2_TOOLCHAIN_HAS_THREADS,$${UCLIBC_CONFIG_FILE},Thread support)
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#
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# Check that the Buildroot configuration of the ABI matches the
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# configuration of the external toolchain.
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#
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check_arm_abi = \
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EXT_TOOLCHAIN_TARGET=$(shell LANG=C $(TARGET_CC) -v 2>&1 | grep ^Target | cut -f2 -d ' ') ; \
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if echo $${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 $${EXT_TOOLCHAIN_ABI} = "oabi" ] ; then \
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echo "Incorrect ABI setting" ; \
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exit 1 ; \
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fi
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#
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# Check that the external toolchain supports C++
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#
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check_cplusplus = \
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$(TARGET_CXX) -v > /dev/null 2>&1 ; \
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if test $$? -ne 0 ; then \
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echo "C++ support is selected but is 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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$(TARGET_CC) -v > /dev/null 2>&1 ; \
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if test $$? -ne 0 ; then \
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echo "Cannot execute cross-compiler '$(TARGET_CC)'" ; \
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exit 1 ; \
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fi
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