Unfortunately, there is no easy way (perhaps no way at all?) to tell the difference between "empty string value of an env var" and "env var does not exist".<br><br>But you can do this:<br><br>IF("$ENV{TESTVAR}" STREQUAL "")
<br> # code to handle empty/non-existent env var<br>ELSE("$ENV{TESTVAR}" STREQUAL "")<br> # code that uses non-empty "$ENV{TESTVAR}"<br>ENDIF("$ENV{TESTVAR}" STREQUAL "")
<br><br><br>HTH,<br>David<br><br><br><div><span class="gmail_quote">On 11/16/07, <b class="gmail_sendername">Sören Freudiger</b> <<a href="mailto:muffmolch@gmx.de">muffmolch@gmx.de</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Just a short question.<br><br>How to check if an environment variable exist?<br><br>Something like:<br>IF( ENV{TESTVAR} )<br>...<br><br>Because elsewise I get errors at $ENV{TESTVAR} if TESTVAR doesn't exist...<br><br>
Best,<br>SirAnn<br><br><br><br>_______________________________________________<br>CMake mailing list<br><a href="mailto:CMake@cmake.org">CMake@cmake.org</a><br><a href="http://www.cmake.org/mailman/listinfo/cmake">http://www.cmake.org/mailman/listinfo/cmake
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