Quoting "Clark J. Wang" <[EMAIL PROTECTED]>:
The header of many CMake modules often looks like this (take
CheckIncludeFile as an example):
MACRO(CHECK_INCLUDE_FILE INCLUDE VARIABLE)
IF("${VARIABLE}" MATCHES "^${VARIABLE}$")
... ...
The IF statement really puzzles me a lot. What is it used to do?
In strings it would mean "if this string is exactly equal to". The
caret (^) represents string beginning and the $ represents string end.
Why is IF("${VARIABLE}" MATCHES "^${VARIABLE}$") used instead of IF(
${VARIABLE} STREQUAL ${VARIABLE} ) (which would always return true)?
I'm not sure of use case but I'd say it's checking for special
characters in VARIABLE.
--
Pau Garcia i Quiles
http://www.elpauer.org
(Due to my workload, I may need 10 days to answer)
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