Linux

(cherry-pick): Fix warning when building on Linux #3603

Job	Run time
build (gcc)	2m 20s
build (gcc, CFLAGS=-DTK_NO_DEPRECATED=1)	1m 44s
build (gcc, --disable-shared)	1m 41s
build (gcc, --disable-xft)	1m 45s
test (gcc)	4m 22s
build (gcc, --disable-xss)	2m 2s
test (gcc, --disable-xft)	4m 43s
build (gcc, --enable-symbols)	1m 13s
test (gcc, --enable-symbols)	3m 50s
build (clang)	2m 16s
build (clang, CFLAGS=-DTK_NO_DEPRECATED=1)	1m 55s
build (clang, --disable-shared)	1m 49s
build (clang, --disable-xft)	2m 4s
build (clang, --disable-xss)	1m 50s
build (clang, --enable-symbols)	1m 25s
	34m 59s

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