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@@ -0,0 +1,28 @@
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+#!/bin/sh
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+
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+# Fixup inclusion of libfdt headers, which can fail in older u-boot versions
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+# when libfdt-devel is installed system-wide.
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+# The core change is equivalent to upstream commit
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+# e0d20dc1521e74b82dbd69be53a048847798a90a (first in v2018.03). However, the fixup
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+# is complicated by the fact that the underlying u-boot code changed multiple
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+# times in history:
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+# - The directory scripts/dtc/libfdt only exists since upstream commit
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+# c0e032e0090d6541549b19cc47e06ccd1f302893 (first in v2017.11). For earlier
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+# versions, create a dummy scripts/dtc/libfdt directory with symlinks for the
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+# fdt-related files. This allows to use the same -I<path> option for both
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+# cases.
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+# - The variable 'srctree' used to be called 'SRCTREE' before upstream commit
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+# 01286329b27b27eaeda045b469d41b1d9fce545a (first in v2014.04).
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+# - The original location for libfdt, 'lib/libfdt/', used to be simply
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+# 'libfdt' before upstream commit 0de71d507157c4bd4fddcd3a419140d2b986eed2
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+# (first in v2010.06). Make the 'lib' part optional in the substitution to
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+# handle this.
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+
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+if [ ! -d scripts/dtc/libfdt ]; then
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+ mkdir -p scripts/dtc/libfdt
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+ cd scripts/dtc/libfdt
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+ ln -s ../../../include/fdt.h .
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+ ln -s ../../../include/libfdt*.h .
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+ ln -s ../../../lib/libfdt/libfdt_internal.h .
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+fi
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+sed -i -e 's%-I\ *\$(srctree)/lib/libfdt%-I$(srctree)/scripts/dtc/libfdt%; s%-I\ *\$(SRCTREE)\(/lib\)\?/libfdt%-I$(SRCTREE)/scripts/dtc/libfdt%' tools/Makefile
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