CMake itself does this to include a file at ctest time that applies to
*all* tests:
set_directory_properties(PROPERTIES
TEST_INCLUDE_FILE
"${CMake_BINARY_DIR}/Tests/EnforceConfig.cmake")
It results in this line being generated in CTestTestfile.cmake at the
very top of the file:
include("C:/n/d/Nightly/cmake
Win32-ninja-cl11-Debug/Tests/EnforceConfig.cmake")
If you wrote/configured a file that had this in it (can be in your
build tree, as CMake's is...):
set(ENV{PATH} "/actual/value/of/XXXX_BINDIR:$ENV{PATH}")
...and then set that file as your TEST_INCLUDE_FILE, it should do what
you want in this case.
The documentation is sparse, but there:
http://www.cmake.org/cmake/help/v3.0/prop_dir/TEST_INCLUDE_FILE.html
HTH,
David C.
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