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toolchain helpers: introduce function relpath_prefix

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The helper function copy_toolchain_sysroot has some logic to transform a
path into a number of '../' components based on the depth of that path.

As this same logic will be needed in another place in a subsequent patch,
extract it into a separate helper relpath_prefix.

Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Thomas De Schampheleire 2017-02-07 22:56:42 +01:00 committed by Thomas Petazzoni
parent ba6bac1383
commit a2596422d7
1 changed files with 20 additions and 5 deletions
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25
toolchain/helpers.mk
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@ -122,11 +122,7 @@ copy_toolchain_sysroot = \
cp -a $${SYSROOT_DIR}/usr/include $(STAGING_DIR)/usr ; \ cp -a $${SYSROOT_DIR}/usr/include $(STAGING_DIR)/usr ; \
fi ; \ fi ; \
mkdir -p `dirname $(STAGING_DIR)/$${ARCH_SUBDIR}` ; \ mkdir -p `dirname $(STAGING_DIR)/$${ARCH_SUBDIR}` ; \
relpath="./" ; \ relpath="$(call relpath_prefix,$${ARCH_SUBDIR})./" ; \
nbslashs=`printf $${ARCH_SUBDIR} | sed 's%[^/]%%g' | wc -c` ; \
for slash in `seq 1 $${nbslashs}` ; do \
relpath=$${relpath}"../" ; \
done ; \
ln -s $${relpath} $(STAGING_DIR)/$${ARCH_SUBDIR} ; \ ln -s $${relpath} $(STAGING_DIR)/$${ARCH_SUBDIR} ; \
echo "Symlinking $(STAGING_DIR)/$${ARCH_SUBDIR} -> $${relpath}" ; \ echo "Symlinking $(STAGING_DIR)/$${ARCH_SUBDIR} -> $${relpath}" ; \
fi ; \ fi ; \
@ -419,3 +415,22 @@ check_toolchain_ssp = \
gen_gdbinit_file = \ gen_gdbinit_file = \
mkdir -p $(STAGING_DIR)/usr/share/buildroot/ ; \ mkdir -p $(STAGING_DIR)/usr/share/buildroot/ ; \
echo "set sysroot $(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