Lint-related patches for coreutils

[Paul Eggert]

I went through a lint pass for Coreutils and installed the attached 
patches. These fix only one or two real (albeit unlikely and/or 
technical) bugs. Most of them remove "#ifdef lint"s or "IF_LINT"s that 
should no longer be needed with modern GCC and runtimes, the idea being 
to lessen the difference between linted and unlinted code. If you're 
building with older GCC and/or non-GCC you may run into a few glitches, 
which you can ignore with "make WERROR_CFLAGS=" or with "./configure 
--disable-gcc-warnings" (the default unless you're building from Git).

The biggest lint-oriented change here is the new macro 'main_exit', 
which should be used only in main functions and is equivalent to either 
'exit' or 'return', depending on whether we're pacifying gcc 
-fsanitize=leak. Using this macro helped me to eliminate a lot of 
'IF_LINT (free (x))' calls.

Comments and/or further fixes welcome of course.

0001-expr-lint-cleanup-and-introducing-main_exit.patch
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0002-comm-pacify-fsanitizer-leak.patch
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0003-stat-pacify-fsanitizer-leak.patch
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0004-tr-pacify-fsanitizer-leak.patch
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0005-tsort-pacify-fsanitizer-leak.patch
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0006-seq-pacify-fsanitizer-leak.patch
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0007-ptx-pacify-fsanitizer-leak.patch
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0008-split-pacify-fsanitizer-leak.patch
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0009-sort-pacify-fsanitizer-leak.patch
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0010-tsort-pacify-fsanitizer-leak.patch
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0011-yes-pacify-fsanitizer-leak.patch
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0012-chmod-pacify-fsanitizer-leak.patch
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0013-cp-simplify-cp-install-ln-mv-pacification.patch
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0014-dd-simplify-fsanitize-leak-pacification.patch
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0015-mktemp-simplify-fsanitize-leak-pacification.patch
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0016-numfmt-simplify-fsanitize-leak-pacification.patch
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0017-shuf-simplify-fsanitize-leak-pacification.patch
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0018-tac-simplify-fsanitize-leak-pacification.patch
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0019-tail-simplify-fsanitize-leak-pacification.patch
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0020-test-simplify-gcc-pacification.patch
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0021-basenc-simplify-fsanitize-leak-pacification.patch
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0022-chown-simplify-fsanitize-leak-pacification.patch
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0023-cp-simplify-GCC-pacification.patch
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0024-cut-simplify-fsanitize-leak-pacification.patch
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0025-cut-simplify-and-remove-an-IF_LINT.patch
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0026-date-simplify-fsanitize-leak-pacification.patch
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0027-df-simplify-fsanitize-leak-pacification.patch
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0028-md5sum-remove-IF_LINTs.patch
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0029-env-simplify-fsanitize-leak-pacification.patch
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0030-expand-remove-IF_LINT.patch
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0031-factor-remove-IF_LINT.patch
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0032-hostname-simplify.patch
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0033-paste-remove-IF_LINT.patch
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0034-pinky-simplify-fsanitize-leak-pacification.patch
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0035-pr-simplify-fsanitize-leak-pacification.patch
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0036-shred-remove-IF_LINT.patch
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0037-truncate-simplify.patch
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0038-pr-remove-IF_LINT.patch
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0039-unexpand-remove-IF_LINT.patch
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0040-uniq-remove-IF_LINT.patch
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0041-uptime-simplify-fsanitize-leak-pacification.patch
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0042-dd-do-not-access-uninitialized.patch
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0043-maint-pacify-gcc-flto-Wmaybe-uninitialized.patch
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