4b201090d8
Signed-off-by: Romain Naour <romain.naour@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
395 lines
15 KiB
Makefile
395 lines
15 KiB
Makefile
# This Makefile fragment declares toolchain related helper functions.
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# The copy_toolchain_lib_root function copies a toolchain library and
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# its symbolic links from the sysroot directory to the target
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# directory. Note that this function is used both by the external
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# toolchain logic, and the glibc package, so care must be taken when
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# changing this function.
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#
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# $1: library name
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#
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copy_toolchain_lib_root = \
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LIB="$(strip $1)"; \
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\
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LIBPATHS=`find -L $(STAGING_DIR) -name "$${LIB}" 2>/dev/null` ; \
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for LIBPATH in $${LIBPATHS} ; do \
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DESTDIR=`echo $${LIBPATH} | sed "s,^$(STAGING_DIR)/,," | xargs dirname` ; \
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mkdir -p $(TARGET_DIR)/$${DESTDIR}; \
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while true ; do \
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LIBNAME=`basename $${LIBPATH}`; \
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LIBDIR=`dirname $${LIBPATH}` ; \
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LINKTARGET=`readlink $${LIBPATH}` ; \
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rm -fr $(TARGET_DIR)/$${DESTDIR}/$${LIBNAME}; \
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if test -h $${LIBPATH} ; then \
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ln -sf `basename $${LINKTARGET}` $(TARGET_DIR)/$${DESTDIR}/$${LIBNAME} ; \
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elif test -f $${LIBPATH}; then \
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$(INSTALL) -D -m0755 $${LIBPATH} $(TARGET_DIR)/$${DESTDIR}/$${LIBNAME}; \
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else \
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exit -1; \
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fi; \
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if test -z "$${LINKTARGET}" ; then \
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break ; \
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fi ; \
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LIBPATH="`readlink -f $${LIBPATH}`"; \
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done; \
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done
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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, we need to support two types of multilib toolchains:
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#
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# - The toolchains that have nested sysroots: a main sysroot, and
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# then additional sysroots available as subdirectories of the main
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# one. This is for example used by Sourcery CodeBench toolchains.
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#
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# - The toolchains that have side-by-side sysroots. Each sysroot is a
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# complete one, they simply leave one next to each other. This is
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# for example used by MIPS Codescape toolchains.
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#
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# So, we first detect if the selected architecture variant is not the
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# default one (i.e, if SYSROOT_DIR != ARCH_SYSROOT_DIR).
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#
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# If we are in the situation of a nested sysroot, we:
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#
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# * If needed, 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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# If we are in the situation of a side-by-side sysroot, we:
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#
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# * Create a symbolic link
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#
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# Finally, some toolchains (i.e Linaro binary toolchains) store
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# support libraries (libstdc++, libgcc_s) outside of the sysroot, so
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# we simply copy all the libraries from the "support lib directory"
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# into our sysroot.
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#
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# Note that the 'locale' directories are not copied. They are huge
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# (400+MB) in CodeSourcery toolchains, and they are not really useful.
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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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# $4: directory of libraries ('lib', 'lib32' or 'lib64')
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# $5: support lib directories (for toolchains storing libgcc_s,
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# libstdc++ and other gcc support libraries outside of the
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# sysroot)
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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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ARCH_LIB_DIR="$(strip $4)" ; \
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SUPPORT_LIB_DIR="$(strip $5)" ; \
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for i in etc $${ARCH_LIB_DIR} sbin usr usr/$${ARCH_LIB_DIR}; do \
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if [ -d $${ARCH_SYSROOT_DIR}/$$i ] ; then \
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rsync -au --chmod=u=rwX,go=rX --exclude 'usr/lib/locale' \
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--include '/libexec*/' --exclude '/lib*/' \
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$${ARCH_SYSROOT_DIR}/$$i/ $(STAGING_DIR)/$$i/ ; \
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fi ; \
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done ; \
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SYSROOT_DIR_CANON=`readlink -f $${SYSROOT_DIR}` ; \
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ARCH_SYSROOT_DIR_CANON=`readlink -f $${ARCH_SYSROOT_DIR}` ; \
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if [ $${SYSROOT_DIR_CANON} != $${ARCH_SYSROOT_DIR_CANON} ] ; then \
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relpath="./" ; \
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if [ $${ARCH_SYSROOT_DIR_CANON:0:$${\#SYSROOT_DIR_CANON}} == $${SYSROOT_DIR_CANON} ] ; then \
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if [ ! -d $${ARCH_SYSROOT_DIR}/usr/include ] ; then \
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cp -a $${SYSROOT_DIR}/usr/include $(STAGING_DIR)/usr ; \
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fi ; \
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mkdir -p `dirname $(STAGING_DIR)/$${ARCH_SUBDIR}` ; \
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nbslashs=`printf $${ARCH_SUBDIR} | sed 's%[^/]%%g' | wc -c` ; \
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for slash in `seq 1 $${nbslashs}` ; do \
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relpath=$${relpath}"../" ; \
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done ; \
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ln -s $${relpath} $(STAGING_DIR)/$${ARCH_SUBDIR} ; \
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echo "Symlinking $(STAGING_DIR)/$${ARCH_SUBDIR} -> $${relpath}" ; \
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elif [ `dirname $${ARCH_SYSROOT_DIR_CANON}` == `dirname $${SYSROOT_DIR_CANON}` ] ; then \
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ln -snf $${relpath} $(STAGING_DIR)/`basename $${ARCH_SYSROOT_DIR_CANON}` ; \
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echo "Symlinking $(STAGING_DIR)/`basename $${ARCH_SYSROOT_DIR_CANON}` -> $${relpath}" ; \
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fi ; \
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fi ; \
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if test -n "$${SUPPORT_LIB_DIR}" ; then \
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cp -a $${SUPPORT_LIB_DIR}/* $(STAGING_DIR)/lib/ ; \
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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 specified kernel headers version actually matches the
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# version in the toolchain.
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#
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# $1: sysroot directory
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# $2: kernel version string, in the form: X.Y
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#
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check_kernel_headers_version = \
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if ! support/scripts/check-kernel-headers.sh $(1) $(2); then \
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exit 1; \
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fi
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#
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# Check the specific gcc version actually matches the version in the
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# toolchain
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#
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# $1: path to gcc
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# $2: expected gcc version
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#
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# Some details about the sed expression:
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# - 1!d
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# - delete if not line 1
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#
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# - s/^[^)]+\) ([^[:space:]]+).*/\1/
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# - eat all until the first ')' character followed by a space
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# - match as many non-space chars as possible
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# - eat all the remaining chars on the line
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# - replace by the matched expression
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#
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check_gcc_version = \
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expected_version="$(strip $2)" ; \
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if [ -z "$${expected_version}" ]; then \
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printf "Internal error, gcc version unknown (no GCC_AT_LEAST_X_Y selected)\n"; \
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exit 1 ; \
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fi; \
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real_version=`$(1) --version | sed -r -e '1!d; s/^[^)]+\) ([^[:space:]]+).*/\1/;'` ; \
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if [[ ! "$${real_version}" =~ ^$${expected_version}\. ]] ; then \
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printf "Incorrect selection of gcc version: expected %s.x, got %s\n" \
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"$${expected_version}" "$${real_version}" ; \
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exit 1 ; \
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fi
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#
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# Check the availability of a particular glibc feature. This function
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# is used to check toolchain options that are always supported by
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# glibc, so we simply check that the corresponding option is properly
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# enabled.
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#
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# $1: Buildroot option name
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# $2: feature description
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#
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check_glibc_feature = \
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if [ "$($(1))" != "y" ] ; then \
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echo "$(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 availability of RPC support in a glibc toolchain
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#
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# $1: sysroot directory
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#
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check_glibc_rpc_feature = \
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IS_IN_LIBC=`test -f $(1)/usr/include/rpc/rpc.h && echo y` ; \
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if [ "$(BR2_TOOLCHAIN_HAS_NATIVE_RPC)" != "y" -a "$${IS_IN_LIBC}" = "y" ] ; then \
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echo "RPC support available in C library, please enable BR2_TOOLCHAIN_EXTERNAL_INET_RPC" ; \
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exit 1 ; \
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fi ; \
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if [ "$(BR2_TOOLCHAIN_HAS_NATIVE_RPC)" = "y" -a "$${IS_IN_LIBC}" != "y" ] ; then \
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echo "RPC support not available in C library, please disable BR2_TOOLCHAIN_EXTERNAL_INET_RPC" ; \
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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 `find $${SYSROOT_DIR}/ -maxdepth 2 -name 'ld-linux*.so.*' -o -name 'ld.so.*' -o -name 'ld64.so.*' | wc -l` -eq 0 ; then \
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echo "Incorrect selection of the C library"; \
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exit -1; \
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fi; \
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$(call check_glibc_feature,BR2_USE_MMU,MMU support) ;\
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$(call check_glibc_rpc_feature,$${SYSROOT_DIR})
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#
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# Check that the selected C library really is musl
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#
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# $1: sysroot directory
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check_musl = \
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SYSROOT_DIR="$(strip $1)"; \
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if test ! -f $${SYSROOT_DIR}/lib/libc.so -o -e $${SYSROOT_DIR}/lib/libm.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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#
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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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# If 'Buildroot option name' ($2) is empty it means the uClibc option
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# is mandatory.
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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" $(3) && echo y` ; \
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if [ -z "$(2)" ] ; then \
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if [ "$${IS_IN_LIBC}" != "y" ] ; then \
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echo "$(4) not available in C library, toolchain unsuitable for Buildroot" ; \
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exit 1 ; \
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fi ; \
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else \
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if [ "$($(2))" != "y" -a "$${IS_IN_LIBC}" = "y" ] ; then \
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echo "$(4) available in C library, please enable $(2)" ; \
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exit 1 ; \
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fi ; \
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if [ "$($(2))" = "y" -a "$${IS_IN_LIBC}" != "y" ] ; then \
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echo "$(4) not available in C library, please disable $(2)" ; \
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exit 1 ; \
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fi ; \
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fi
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#
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# Check the correctness of a uclibc external toolchain configuration
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# 1. Check that the C library selected in Buildroot matches the one
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# of the external toolchain
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# 2. Check that the features enabled in the Buildroot configuration
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# match the features available in the uClibc of the external
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# toolchain
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#
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# $1: sysroot directory
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#
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check_uclibc = \
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SYSROOT_DIR="$(strip $1)"; \
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if ! test -f $${SYSROOT_DIR}/usr/include/bits/uClibc_config.h ; 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__,,$${UCLIBC_CONFIG_FILE},Large file support) ;\
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$(call check_uclibc_feature,__UCLIBC_HAS_IPV6__,,$${UCLIBC_CONFIG_FILE},IPv6 support) ;\
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$(call check_uclibc_feature,__UCLIBC_HAS_RPC__,BR2_TOOLCHAIN_HAS_NATIVE_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,$${UCLIBC_CONFIG_FILE},Wide char support) ;\
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$(call check_uclibc_feature,__UCLIBC_HAS_THREADS__,BR2_TOOLCHAIN_HAS_THREADS,$${UCLIBC_CONFIG_FILE},Thread support) ;\
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$(call check_uclibc_feature,__PTHREADS_DEBUG_SUPPORT__,BR2_TOOLCHAIN_HAS_THREADS_DEBUG,$${UCLIBC_CONFIG_FILE},Thread debugging support) ;\
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$(call check_uclibc_feature,__UCLIBC_HAS_THREADS_NATIVE__,BR2_TOOLCHAIN_HAS_THREADS_NPTL,$${UCLIBC_CONFIG_FILE},NPTL thread support) ;\
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$(call check_uclibc_feature,__UCLIBC_HAS_SSP__,BR2_TOOLCHAIN_HAS_SSP,$${UCLIBC_CONFIG_FILE},Stack Smashing Protection support)
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#
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# Check that the Buildroot configuration of the ABI matches the
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# configuration of the external toolchain.
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#
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# $1: cross-gcc path
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# $2: cross-readelf path
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#
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check_arm_abi = \
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__CROSS_CC=$(strip $1) ; \
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__CROSS_READELF=$(strip $2) ; \
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EXT_TOOLCHAIN_TARGET=`LANG=C $${__CROSS_CC} -v 2>&1 | grep ^Target | cut -f2 -d ' '` ; \
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if ! echo $${EXT_TOOLCHAIN_TARGET} | grep -qE 'eabi(hf)?$$' ; then \
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echo "External toolchain uses the unsuported OABI" ; \
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exit 1 ; \
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fi ; \
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if ! echo 'int main(void) {}' | $${__CROSS_CC} -x c -o $(BUILD_DIR)/.br-toolchain-test.tmp - ; then \
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rm -f $(BUILD_DIR)/.br-toolchain-test.tmp*; \
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abistr_$(BR2_ARM_EABI)='EABI'; \
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abistr_$(BR2_ARM_EABIHF)='EABIhf'; \
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echo "Incorrect ABI setting: $${abistr_y} selected, but toolchain is incompatible"; \
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exit 1 ; \
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fi ; \
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rm -f $(BUILD_DIR)/.br-toolchain-test.tmp*
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#
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# Check that the external toolchain supports C++
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#
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# $1: cross-g++ path
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#
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check_cplusplus = \
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__CROSS_CXX=$(strip $1) ; \
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$${__CROSS_CXX} -v > /dev/null 2>&1 ; \
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if test $$? -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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# $1: cross-gcc path
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#
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check_cross_compiler_exists = \
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__CROSS_CC=$(strip $1) ; \
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$${__CROSS_CC} -v > /dev/null 2>&1 ; \
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if test $$? -ne 0 ; then \
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echo "Cannot execute cross-compiler '$${__CROSS_CC}'" ; \
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exit 1 ; \
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fi
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#
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# Check for toolchains known not to work with Buildroot.
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# - For the Angstrom toolchains, we check by looking at the vendor part of
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# the host tuple.
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# - Exclude distro-class toolchains which are not relocatable.
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# - Exclude broken toolchains which return "libc.a" with -print-file-name.
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# - Exclude toolchains which doesn't support --sysroot option.
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#
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# $1: cross-gcc path
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#
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check_unusable_toolchain = \
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__CROSS_CC=$(strip $1) ; \
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vendor=`$${__CROSS_CC} -dumpmachine | cut -f2 -d'-'` ; \
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if test "$${vendor}" = "angstrom" ; then \
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echo "Angstrom toolchains are not pure toolchains: they contain" ; \
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echo "many other libraries than just the C library, which makes" ; \
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echo "them unsuitable as external toolchains for build systems" ; \
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echo "such as Buildroot." ; \
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exit 1 ; \
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fi; \
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with_sysroot=`$${__CROSS_CC} -v 2>&1 |sed -r -e '/.* --with-sysroot=([^[:space:]]+)[[:space:]].*/!d; s//\1/'`; \
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if test "$${with_sysroot}" = "/" ; then \
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echo "Distribution toolchains are unsuitable for use by Buildroot," ; \
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echo "as they were configured in a way that makes them non-relocatable,"; \
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echo "and contain a lot of pre-built libraries that would conflict with"; \
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echo "the ones Buildroot wants to build."; \
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exit 1; \
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fi; \
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libc_a_path=`$${__CROSS_CC} -print-file-name=libc.a` ; \
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if test "$${libc_a_path}" = "libc.a" ; then \
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echo "Unable to detect the toolchain sysroot, Buildroot cannot use this toolchain." ; \
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exit 1 ; \
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fi ; \
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sysroot_dir="$(call toolchain_find_sysroot,$${__CROSS_CC})" ; \
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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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#
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# Generate gdbinit file for use with Buildroot
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#
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gen_gdbinit_file = \
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mkdir -p $(STAGING_DIR)/usr/share/buildroot/ ; \
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echo "set sysroot $(STAGING_DIR)" > $(STAGING_DIR)/usr/share/buildroot/gdbinit
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