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+2019-05-03 Paul Eggert <eggert@cs.ucla.edu>
+
+ Port manywarnings to GCC 9
+ * build-aux/gcc-warning.spec: Sort. Add -Wattribute-alias,
+ -Wc11-c2x-compat, -Wcast-result (for the D programming language),
+ -Wclass-conversion, -Wdeprecated-copy, -Wdeprecated-copy-dtor,
+ -Winit-list-lifetime, -Wpessimizing-move, -Wprio-ctor-dtor,
+ -Wredundant-move. Adjust to minor wording changes in GCC 9’s
+ --help=warnings output.
+ * m4/manywarnings.m4 (gl_MANYWARN_ALL_GCC): Add -Wabsolute-value,
+ -Waddress-of-packed-member, -Wattribute-warning, -Wcannot-profile,
+ -Wmissing-profile. Change -Wattribute-alias to -Wattribute-alias=2.
+
2019-04-30 Paul Eggert <eggert@cs.ucla.edu>
Sync lib/mktime-internal.h from glibc