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| author | Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> | 2017-02-07 22:56:44 +0100 |
|---|---|---|
| committer | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2017-04-05 21:32:13 +0200 |
| commit | 144caf5c5b0378b6f508c261c01279636db7eb15 (patch) | |
| tree | 95f3b85730b10b77682f2714f932a1d1c97f1a08 /toolchain/helpers.mk | |
| parent | a06edf201b4954e441065b565fe7fd677f8e41ea (diff) | |
| download | buildroot-144caf5c5b0378b6f508c261c01279636db7eb15.tar.gz buildroot-144caf5c5b0378b6f508c261c01279636db7eb15.zip | |
toolchain helpers: introduce simplify_symlink
The external toolchain logic flattens the directory layout in the staging
directory. Regardless of the number of levels present in the extracted
toolchain, libraries are always copied to lib/ and usr/lib/, and directory
symbolic links are provided to make the original paths available as well.
Due to this, the same library may be reachable through a number of paths:
one path without any symbolic link, and one or more paths using directory
symlinks.
Using a direct path in a symlink destination is generally preferred because
it is clearer, but it is also more robust against accidental removal of an
intermediate directory symlink.
Introduce a helper function to simplify a symlink's destination to such a
direct path. This function will be used in a subsequent patch.
Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'toolchain/helpers.mk')
| -rw-r--r-- | toolchain/helpers.mk | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/toolchain/helpers.mk b/toolchain/helpers.mk index 16864854b4..5137b5d102 100644 --- a/toolchain/helpers.mk +++ b/toolchain/helpers.mk @@ -451,3 +451,30 @@ $$( \ printf "$$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 |
