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diff -Nrup a/Makefile b/Makefile
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--- a/Makefile	2018-10-04 14:49:24.000000000 -0400
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+++ b/Makefile	2018-10-18 16:23:33.675393451 -0400
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@@ -343,7 +343,7 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fn
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 # January's first Monday when a "%V" format is used and January 1
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 # falls on a Friday, Saturday, or Sunday.
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-CFLAGS=
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+CFLAGS= -DHAVE_SNPRINTF=1
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 # Linker flags.  Default to $(LFLAGS) for backwards compatibility
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 # to release 2012h and earlier.
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Binary files a/tzdata2018f-rearguard.tar.gz and b/tzdata2018f-rearguard.tar.gz differ