CMake/Tests/PolicyScope/CMakeLists.txt

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project(PolicyScope C)
# No cmake_minimum_required(VERSION), it's in FindFoo.
#-----------------------------------------------------------------------------
# Helper function to report results.
function(check msg lhs rhs)
if(NOT "${lhs}" STREQUAL "${rhs}")
message(FATAL_ERROR "${msg}: expected [${lhs}], got [${rhs}]")
endif()
endfunction(check)
#-----------------------------------------------------------------------------
# Test using a development framework that sets policies for us.
# Policy CMP0011 should not be set at this point.
cmake_policy(GET CMP0011 cmp)
check(CMP0011 "" "${cmp}")
# Put the test modules in the search path.
list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR})
# The included file should set policies for us.
find_package(Foo)
# Check policies set by the package.
cmake_policy(GET CMP0003 cmp)
check(CMP0003 "OLD" "${cmp}")
cmake_policy(GET CMP0002 cmp)
check(CMP0002 "NEW" "${cmp}")
cmake_policy(GET CMP0011 cmp)
check(CMP0011 "NEW" "${cmp}")
# Make sure an included file cannot change policies.
include(Bar)
cmake_policy(GET CMP0003 cmp)
check(CMP0003 "OLD" "${cmp}")
# Allow the included file to change policies.
include(Bar NO_POLICY_SCOPE)
cmake_policy(GET CMP0003 cmp)
check(CMP0003 "NEW" "${cmp}")
#-----------------------------------------------------------------------------
# Test function and macro policy recording.
# Create the functions in an isolated scope in which we change policies.
cmake_policy(PUSH)
if(1)
# Change CMP0002
cmake_policy(SET CMP0002 OLD)
function(func1)
# CMP0002 should be changed when this function is invoked
cmake_policy(GET CMP0002 cmp)
check(CMP0002 "OLD" "${cmp}")
endfunction(func1)
# Unset CMP0002
cmake_policy(VERSION 2.4)
macro(macro1)
# CMP0002 should be unset when this macro is invoked
cmake_policy(GET CMP0002 cmp)
check(CMP0002 "" "${cmp}")
# Setting the policy should work here and also in the caller.
cmake_policy(SET CMP0002 OLD)
cmake_policy(GET CMP0002 cmp)
check(CMP0002 "OLD" "${cmp}")
endmacro(macro1)
endif(1)
cmake_policy(POP)
# CMP0002 should still be NEW in this context.
cmake_policy(GET CMP0002 cmp)
check(CMP0002 "NEW" "${cmp}")
# Check the recorded policies
func1()
macro1()
# The macro should have changed CMP0002.
cmake_policy(GET CMP0002 cmp)
check(CMP0002 "OLD" "${cmp}")
#-----------------------------------------------------------------------------
# Dummy executable so the project can build and run.
add_executable(PolicyScope main.c)