235acd628a
When changing permissions on all directories in the staging directory, after copying sysroot, paths that contain spaces break the call to chmod. With -print0 for find and -0 for xargs white spaces are correctly interpreted. Signed-off-by: Daniel Lang <d.lang@abatec.at> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
532 lines
19 KiB
Makefile
532 lines
19 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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# $1: library name pattern (can include glob wildcards)
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#
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copy_toolchain_lib_root = \
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LIBPATTERN="$(strip $1)"; \
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LIBPATHS=`find $(STAGING_DIR)/ -name "$${LIBPATTERN}" 2>/dev/null` ; \
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for LIBPATH in $${LIBPATHS} ; do \
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while true ; do \
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LIBNAME=`basename $${LIBPATH}`; \
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DESTDIR=`echo $${LIBPATH} | sed "s,^$(STAGING_DIR)/,," | xargs dirname` ; \
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mkdir -p $(TARGET_DIR)/$${DESTDIR}; \
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rm -fr $(TARGET_DIR)/$${DESTDIR}/$${LIBNAME}; \
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if test -h $${LIBPATH} ; then \
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cp -d $${LIBPATH} $(TARGET_DIR)/$${DESTDIR}/$${LIBNAME}; \
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LIBPATH="`readlink -f $${LIBPATH}`"; \
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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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break ; \
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else \
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exit -1; \
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fi; \
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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, usr and usr/'lib' from the
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# sysroot of the selected architecture variant (as pointed to by
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# ARCH_SYSROOT_DIR). This allows to import into the staging directory
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# the C library and companion libraries for the correct architecture
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# variant. 'lib' may not be literally 'lib' but could be something else,
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# e.g. lib32-fp (as determined by ARCH_LIB_DIR) and we only want to copy
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# that lib directory and no other. When copying usr, we therefore need
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# to be extra careful not to include usr/lib* but we _do_ want to
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# include usr/libexec.
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# We are selective in the directories we copy 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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# If ARCH_LIB_DIR is not a singular directory component, e.g.
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# 'lib32/octeon2', then symbolic links in ARCH_LIB_DIR and
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# usr/ARCH_LIB_DIR may be broken because Buildroot will flatten the
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# directory structure (e.g. lib32/octeon2/foo is actually stored in
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# lib/foo). This is only relevant for links that contain one or more ../
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# components, as links to the current directory are always fine.
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# We need to fix the broken links by removing the right amount of ../
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# dots from the link destination.
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# Once the link destination is valid again, it can be simplified to
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# remove the dependency on intermediate directory symlinks.
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#
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# It is possible that ARCH_LIB_DIR does not contain the dynamic loader
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# (ld*.so or similar) because it (or the main symlink to it) normally
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# resides in /lib while ARCH_LIB_DIR may be something else (e.g. lib64,
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# lib/<tuple>, ...). Therefore, copy the dynamic loader separately.
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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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# Some toolchains (i.e Linaro binary toolchains) store support
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# libraries (libstdc++, libgcc_s) outside of the sysroot, so we simply
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# copy all the libraries from the "support lib directory" into our
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# 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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continue ; \
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fi ; \
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if [ "$$i" = "usr" ]; then \
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rsync -au --chmod=u=rwX,go=rX --exclude 'locale/' \
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--include '/libexec*/' --exclude '/lib*/' \
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$${ARCH_SYSROOT_DIR}/$$i/ $(STAGING_DIR)/$$i/ ; \
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else \
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rsync -au --chmod=u=rwX,go=rX --exclude 'locale/' \
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$${ARCH_SYSROOT_DIR}/$$i/ $(STAGING_DIR)/$$i/ ; \
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fi ; \
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done ; \
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for link in $$(find $(STAGING_DIR) -type l); do \
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target=$$(readlink $${link}) ; \
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if [ "$${target}" == "$${target$(SHARP_SIGN)/}" ] ; then \
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continue ; \
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fi ; \
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relpath="$(call relpath_prefix,$${target$(SHARP_SIGN)/})" ; \
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echo "Fixing symlink $${link} from $${target} to $${relpath}$${target$(SHARP_SIGN)/}" ; \
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ln -sf $${relpath}$${target$(SHARP_SIGN)/} $${link} ; \
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done ; \
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relpath="$(call relpath_prefix,$${ARCH_LIB_DIR})" ; \
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if [ "$${relpath}" != "" ]; then \
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for i in $$(find -H $(STAGING_DIR)/$${ARCH_LIB_DIR} $(STAGING_DIR)/usr/$${ARCH_LIB_DIR} -type l -xtype l); do \
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LINKTARGET=`readlink $$i` ; \
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NEWLINKTARGET=$${LINKTARGET\#$$relpath} ; \
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ln -sf $${NEWLINKTARGET} $$i ; \
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$(call simplify_symlink,$$i,$(STAGING_DIR)) ; \
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done ; \
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fi ; \
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if [[ ! $$(find $(STAGING_DIR)/lib -name 'ld*.so.*' -print -quit) ]]; then \
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find $${ARCH_SYSROOT_DIR}/lib -name 'ld*.so.*' -print0 | xargs -0 -I % cp % $(STAGING_DIR)/lib/; \
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fi ; \
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if [ `readlink -f $${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 $${SYSROOT_DIR}/usr/include $(STAGING_DIR)/usr ; \
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fi ; \
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mkdir -p `dirname $(STAGING_DIR)/$${ARCH_SUBDIR}` ; \
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relpath="$(call relpath_prefix,$${ARCH_SUBDIR})./" ; \
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ln -s $${relpath} $(STAGING_DIR)/$${ARCH_SUBDIR} ; \
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echo "Symlinking $(STAGING_DIR)/$${ARCH_SUBDIR} -> $${relpath}" ; \
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fi ; \
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if test -n "$${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 -print0 | xargs -0 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: build directory
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# $2: sysroot directory
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# $3: kernel version string, in the form: X.Y
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# $4: test to do for the latest kernel version, 'strict' or 'loose'
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# always 'strict' if this is not the latest version.
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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) $(3) \
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$(if $(BR2_TOOLCHAIN_HEADERS_LATEST),$(4),strict); \
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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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check_gcc_version = \
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expected_version="$(strip $2)" ; \
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if [ -z "$${expected_version}" ]; then \
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exit 0 ; \
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fi; \
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real_version=`$(1) -dumpversion` ; \
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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 -L $${SYSROOT_DIR}/ -maxdepth 2 -name 'ld-linux*.so.*' -o -name 'ld.so.*' -o -name 'ld64.so.*' | wc -l` -eq 0 ; then \
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echo "Incorrect selection of the C library"; \
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exit -1; \
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fi; \
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$(call check_glibc_feature,BR2_USE_MMU,MMU support) ;\
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$(call check_glibc_rpc_feature,$${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: cross-gcc path
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# $2: cross-readelf path
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check_musl = \
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__CROSS_CC=$(strip $1) ; \
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libc_a_path=`$${__CROSS_CC} -print-file-name=libc.a` ; \
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if ! strings $${libc_a_path} | grep -q MUSL_LOCPATH ; 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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#
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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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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 $$? -ne 0 ; then \
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echo "C++ support is selected but is not available in external toolchain" ; \
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exit 1 ; \
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fi
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#
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#
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# Check that the external toolchain supports D language
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#
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# $1: cross-gdc path
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#
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check_dlang = \
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__CROSS_GDC=$(strip $1) ; \
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__o=$(BUILD_DIR)/.br-toolchain-test-dlang.tmp ; \
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printf 'import std.stdio;\nvoid main() { writeln("Hello World!"); }\n' | \
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$${__CROSS_GDC} -x d -o $${__o} - ; \
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if test $$? -ne 0 ; then \
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rm -f $${__o}* ; \
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echo "D language support is selected but is not available in external toolchain" ; \
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exit 1 ; \
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fi ; \
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rm -f $${__o}* \
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#
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#
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# Check that the external toolchain supports Fortran
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#
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# $1: cross-gfortran path
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#
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check_fortran = \
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__CROSS_FC=$(strip $1) ; \
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__o=$(BUILD_DIR)/.br-toolchain-test-fortran.tmp ; \
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printf 'program hello\n\tprint *, "Hello Fortran!\\n"\nend program hello\n' | \
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$${__CROSS_FC} -x f95 -o $${__o} - ; \
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if test $$? -ne 0 ; then \
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rm -f $${__o}* ; \
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echo "Fortran 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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rm -f $${__o}* \
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#
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#
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# Check that the external toolchain supports OpenMP
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#
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# $1: cross-gcc path
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#
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check_openmp = \
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__CROSS_CC=$(strip $1) ; \
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__o=$(BUILD_DIR)/.br-toolchain-test-openmp.tmp ; \
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printf '\#include <omp.h>\nint main(void) { return omp_get_thread_num(); }' | \
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$${__CROSS_CC} -fopenmp -x c -o $${__o} - ; \
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if test $$? -ne 0 ; then \
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rm -f $${__o}* ; \
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echo "OpenMP support is selected but is not available in external toolchain"; \
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exit 1 ; \
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fi ; \
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rm -f $${__o}* \
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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) ; \
|
|
$${__CROSS_CC} -v > /dev/null 2>&1 ; \
|
|
if test $$? -ne 0 ; then \
|
|
echo "Cannot execute cross-compiler '$${__CROSS_CC}'" ; \
|
|
exit 1 ; \
|
|
fi
|
|
|
|
#
|
|
# Check for toolchains known not to work with Buildroot.
|
|
# - For the Angstrom toolchains, we check by looking at the vendor part of
|
|
# the host tuple.
|
|
# - Exclude distro-class toolchains which are not relocatable.
|
|
# - Exclude broken toolchains which return "libc.a" with -print-file-name.
|
|
# - Exclude toolchains which doesn't support --sysroot option.
|
|
#
|
|
# $1: cross-gcc path
|
|
#
|
|
check_unusable_toolchain = \
|
|
__CROSS_CC=$(strip $1) ; \
|
|
vendor=`$${__CROSS_CC} -dumpmachine | cut -f2 -d'-'` ; \
|
|
if test "$${vendor}" = "angstrom" ; then \
|
|
echo "Angstrom toolchains are not pure toolchains: they contain" ; \
|
|
echo "many other libraries than just the C library, which makes" ; \
|
|
echo "them unsuitable as external toolchains for build systems" ; \
|
|
echo "such as Buildroot." ; \
|
|
exit 1 ; \
|
|
fi; \
|
|
with_sysroot=`$${__CROSS_CC} -v 2>&1 |sed -r -e '/.* --with-sysroot=([^[:space:]]+)[[:space:]].*/!d; s//\1/'`; \
|
|
if test "$${with_sysroot}" = "/" ; then \
|
|
echo "Distribution toolchains are unsuitable for use by Buildroot," ; \
|
|
echo "as they were configured in a way that makes them non-relocatable,"; \
|
|
echo "and contain a lot of pre-built libraries that would conflict with"; \
|
|
echo "the ones Buildroot wants to build."; \
|
|
exit 1; \
|
|
fi; \
|
|
libc_a_path=`$${__CROSS_CC} -print-file-name=libc.a` ; \
|
|
if test "$${libc_a_path}" = "libc.a" ; then \
|
|
echo "Unable to detect the toolchain sysroot, Buildroot cannot use this toolchain." ; \
|
|
exit 1 ; \
|
|
fi ; \
|
|
sysroot_dir="$(call toolchain_find_sysroot,$${__CROSS_CC})" ; \
|
|
if test -z "$${sysroot_dir}" ; then \
|
|
echo "External toolchain doesn't support --sysroot. Cannot use." ; \
|
|
exit 1 ; \
|
|
fi
|
|
|
|
#
|
|
# Check if the toolchain has SSP (stack smashing protector) support
|
|
#
|
|
# $1: cross-gcc path
|
|
# $2: gcc ssp option
|
|
#
|
|
check_toolchain_ssp = \
|
|
__CROSS_CC=$(strip $1) ; \
|
|
__HAS_SSP=`echo 'void main(){}' | $${__CROSS_CC} -Werror -fstack-protector -x c - -o $(BUILD_DIR)/.br-toolchain-test.tmp >/dev/null 2>&1 && echo y` ; \
|
|
if [ "$(BR2_TOOLCHAIN_HAS_SSP)" != "y" -a "$${__HAS_SSP}" = "y" ] ; then \
|
|
echo "SSP support available in this toolchain, please enable BR2_TOOLCHAIN_EXTERNAL_HAS_SSP" ; \
|
|
exit 1 ; \
|
|
fi ; \
|
|
if [ "$(BR2_TOOLCHAIN_HAS_SSP)" = "y" -a "$${__HAS_SSP}" != "y" ] ; then \
|
|
echo "SSP support not available in this toolchain, please disable BR2_TOOLCHAIN_EXTERNAL_HAS_SSP" ; \
|
|
exit 1 ; \
|
|
fi ; \
|
|
__SSP_OPTION=$(2); \
|
|
if [ -n "$${__SSP_OPTION}" ] ; then \
|
|
if ! echo 'void main(){}' | $${__CROSS_CC} -Werror $${__SSP_OPTION} -x c - -o $(BUILD_DIR)/.br-toolchain-test.tmp >/dev/null 2>&1 ; then \
|
|
echo "SSP option $${__SSP_OPTION} not available in this toolchain, please select another SSP level" ; \
|
|
exit 1 ; \
|
|
fi; \
|
|
fi; \
|
|
rm -f $(BUILD_DIR)/.br-toolchain-test.tmp*
|
|
|
|
#
|
|
# Generate gdbinit file for use with Buildroot
|
|
#
|
|
gen_gdbinit_file = \
|
|
mkdir -p $(STAGING_DIR)/usr/share/buildroot/ ; \
|
|
echo "add-auto-load-safe-path $(STAGING_DIR)" > $(STAGING_DIR)/usr/share/buildroot/gdbinit ; \
|
|
echo "set sysroot $(STAGING_DIR)" >> $(STAGING_DIR)/usr/share/buildroot/gdbinit
|
|
|
|
# Given a path, determine the relative prefix (../) needed to return to the
|
|
# root level. Note that the last component is treated as a file component; use a
|
|
# trailing slash to force treating it as a directory. Examples:
|
|
# relpath_prefix(lib32) = ""
|
|
# relpath_prefix(lib32/octeon2) = "../"
|
|
# relpath_prefix(lib32/octeon2/) = "../../"
|
|
#
|
|
# $1: input path
|
|
define relpath_prefix
|
|
$$( \
|
|
prefix="" ; \
|
|
nbslashs=`printf $1 | sed 's%[^/]%%g' | wc -c` ; \
|
|
for slash in `seq 1 $${nbslashs}` ; do \
|
|
prefix=$${prefix}"../" ; \
|
|
done ; \
|
|
printf "$$prefix" ; \
|
|
)
|
|
endef
|
|
|
|
# Replace the destination of a symbolic link with a simpler version
|
|
# For example,
|
|
# usr/lib/libfoo.so -> ../../lib32/libfoo.so.1
|
|
# becomes
|
|
# usr/lib/libfoo.so -> ../../lib/libfoo.so.1
|
|
# since 'lib32' is a symlink to 'lib'.
|
|
#
|
|
# Likewise,
|
|
# usr/lib/octeon2/libbar.so -> ../../../lib32/octeon2/libbar.so.1
|
|
# becomes
|
|
# usr/lib/octeon2/libbar.so -> ../../lib/libbar.so.1
|
|
# assuming lib32->lib and lib/octeon2->lib.
|
|
#
|
|
# $1: symlink
|
|
# $2: base path
|
|
define simplify_symlink
|
|
( \
|
|
FULL_SRC="$$(readlink -f $$(dirname $1))/$$(basename $1)" ; \
|
|
FULL_DEST="$$(readlink -f $1)" ; \
|
|
FULL_BASE="$$(readlink -f $2)" ; \
|
|
REL_SRC="$${FULL_SRC#$${FULL_BASE}/}" ; \
|
|
REL_DEST="$${FULL_DEST#$${FULL_BASE}/}" ; \
|
|
DOTS="$(call relpath_prefix,$${REL_SRC})" ; \
|
|
ln -sf "$${DOTS}$${REL_DEST}" "$${FULL_SRC}" ; \
|
|
)
|
|
endef
|