docs: Set minimal gtags / GNU GLOBAL version to 6.6.5
Kernel build now uses the gtags "-C (--directory)" option, available since GNU GLOBAL v6.6.5. Update the documentation accordingly. Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de> Cc: <stable@vger.kernel.org> Link: https://lists.gnu.org/archive/html/info-global/2020-09/msg00000.html Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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@ -60,6 +60,7 @@ openssl & libcrypto 1.0.0 openssl version
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bc 1.06.95 bc --version
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Sphinx\ [#f1]_ 1.7 sphinx-build --version
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cpio any cpio --version
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gtags (optional) 6.6.5 gtags --version
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====================== =============== ========================================
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.. [#f1] Sphinx is needed only to build the Kernel documentation
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@ -174,6 +175,12 @@ You will need openssl to build kernels 3.7 and higher if module signing is
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enabled. You will also need openssl development packages to build kernels 4.3
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and higher.
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gtags / GNU GLOBAL (optional)
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-----------------------------
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The kernel build requires GNU GLOBAL version 6.6.5 or later to generate
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tag files through ``make gtags``. This is due to its use of the gtags
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``-C (--directory)`` flag.
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System utilities
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****************
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