Hi,
I've just had a CMakeLists.txt fail to work as expected because somebody was
testing to see whether an environment variable was set with the syntax: if
(DEFINED $ENV{VAR}). This short example shows the problem:
cmake_minimum_required(VERSION 2.8)
project(foo)
message("HOME: $ENV{HOME}")
if (DEFINED $ENV{HOME})
message("HOME is defined")
else()
message("HOME is NOT defined")
endif()
if (DEFINED FOO)
message("At 1: FOO is defined")
else()
message("At 1: FOO is NOT defined")
endif()
set(FOO "foo")
if (DEFINED FOO)
message("At 2:FOO is defined")
else()
message("At 2:FOO is NOT defined")
endif()
When run it prints this:
HOME: /user/grc
HOME is NOT defined
At 1: FOO is NOT defined
At 2:FOO is defined
So the test for if a variable is defined works for cmake variables but not
for environment variables. I can work around this by testing if the
environment variable is the empty string I guess. Is the current behaviour
what is wanted, or is this a bug ?
--
Glenn
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