391 Isolate cmake files of example #858

Job	Run time
linux-gnu-shared-ext-log	1m 20s
linux-gnu-shared-ext-nolog	1m 15s
linux-gnu-static-all-test	3m 2s
linux-gnu-shared-all-test	3m 0s
linux-gnu-shared-noext-nolog	1m 12s
linux-clang-shared-ext-log	1m 43s
linux-clang-shared-ext-nolog	1m 34s
linux-clang-static-all-test	3m 39s
linux-clang-shared-all-test	3m 45s
linux-clang-shared-noext-nolog	1m 35s
win-cygwin-shared-ext-log	8m 44s
win-cygwin-shared-ext-nolog	8m 33s
win-cygwin-static-all-test	13m 31s
win-cygwin-shared-all-test	13m 52s
win-cygwin-shared-noext-nolog	8m 34s
win-clang-shared-ext-log	6m 11s
win-clang-shared-ext-nolog	6m 21s
win-clang-static-all-test	7m 56s
win-clang-shared-all-test	9m 22s
win-clang-shared-noext-nolog	7m 18s
win-msvc-shared-ext-log	4m 13s
win-msvc-shared-ext-nolog	4m 14s
win-msvc-static-all-test	7m 22s
win-msvc-shared-all-test	7m 46s
win-msvc-shared-noext-log	5m 8s
win-msvc-shared-noext-nolog	3m 54s
	2h 25m 4s

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