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build: use absolute path for M=
Use absolute path for M during checking kernelrelease. This will force temporary objects be built in the current directory and not $kbuilddir as it happened, e.g. in the current kernel scripts/Kbuild.include try-run target (it is called with TMPOUT=M=. and during call pwd=$kbuilddir). This should fix sandbox violation in Gentoo: https://bugs.gentoo.org/show_bug.cgi?id=371997
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committed by
Jan Engelhardt

parent
ef7fb0db7f
commit
e84391ce66
@@ -42,7 +42,7 @@ regular_CFLAGS="-Wall -Waggregate-return -Wmissing-declarations \
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if test -n "$kbuilddir"; then
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AC_MSG_CHECKING([kernel version that we will build against])
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krel="$(make -sC "$kbuilddir" M=. kernelrelease)";
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krel="$(make -sC "$kbuilddir" M=$PWD kernelrelease)";
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kmajor="${krel%%[[^0-9]]*}";
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kmajor="$(($kmajor+0))";
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krel="${krel:${#kmajor}}";
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