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During a linux-backports update, it was found that kernel v3.10.108 was
failing to compile. See:
https://lists.buildroot.org/pipermail/buildroot/2022-August/649507.html
This issue was introduced by commit 9b41b54be0
"linux: fix build with host-gcc 10+", which removes all declarations of
"yylloc" symbols in the dtc parser. This symbol is generated by bison, if the
"%locations" directive is provided in the parser. See:
https://git.savannah.gnu.org/cgit/bison.git/tree/doc/bison.texi?h=v3.8.2#n5984
Kernel versions < 5.6 did not include this directive, so removing all
yylloc declararions in the parser also was failing for those version.
In the kernel, dtc was updated to v1.5.1-22-gc40aeb60b47a in:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=0cec114e36606412908a35695a5db944cec2e3db
This commit is included in kernel v5.6.
This dtc update include the dtc commit:
https://git.kernel.org/pub/scm/utils/dtc/dtc.git/commit/?id=7150286225476345bd6e7312331e3baf4d621c32
which adds the '%locations' directive.
This commit fixes the issue by programmatically adding the '%locations'
Bison directive, if it's not found in the parser file.
Fixes:
- https://bugs.busybox.net/show_bug.cgi?id=14971
Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>