[CMake] Unable to find ctime_s

[David Carter]

I'm writing a configuration that will use Microsoft's secure functions  
when available, and use the standard versions on other platforms. I've  
got these lines in CMakeLists.txt:

CHECK_FUNCTION_EXISTS("ctime_s" HAVE_CTIME_S)
CHECK_FUNCTION_EXISTS("strcpy_s" HAVE_STRCPY_S)
CHECK_FUNCTION_EXISTS("strncpy_s" HAVE_STRNCPY_S)
CHECK_FUNCTION_EXISTS("strncat_s" HAVE_STRNCAT_S)

It works for all functions except ctime_s, even though I know it's in  
there, defined in the time.h (or ctime for C++) header. So I tried the  
following:

FIND_PATH(CTIME_INCLUDE_DIR time.h)

and it's unable to find the header.

Suggestions?

TIA,
Dave

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