Added in version 3.22.
Specify environment variables that should be modified for running a test. Note
that the operations performed by this property are performed after the
ENVIRONMENT property is already applied.
Set to a semicolon-separated list of
environment variables and values of the form MYVAR=OP:VALUE,
where MYVAR is the case-sensitive name of an environment variable
to be modified. Entries are considered in the order specified in the
property's value. The OP may be one of:
reset: Reset to the unmodified value, ignoring all modifications to
MYVAR prior to this entry. Note that this will reset the variable to
the value set by ENVIRONMENT, if it was set, and otherwise
to its state from the rest of the CTest execution.
set: Replaces the current value of MYVAR with VALUE.
unset: Unsets the current value of MYVAR.
string_append: Appends singular VALUE to the current value of
MYVAR.
string_prepend: Prepends singular VALUE to the current value of
MYVAR.
path_list_append: Appends singular VALUE to the current value of
MYVAR using the host platform's path list separator (; on Windows
and : elsewhere).
path_list_prepend: Prepends singular VALUE to the current value of
MYVAR using the host platform's path list separator (; on Windows
and : elsewhere).
cmake_list_append: Appends singular VALUE to the current value of
MYVAR using ; as the separator.
cmake_list_prepend: Prepends singular VALUE to the current value of
MYVAR using ; as the separator.
Unrecognized OP values will result in the test failing before it is
executed. This is so that future operations may be added without changing
valid behavior of existing tests.
The environment changes from this property do not affect other tests.