Hi all,
As it seems you get an erroneous CMP0022 warning in the following scenario, due
to a generator expression not being resolved before string comparison.
Confirmed with versions 3.5.1 and rev 00a583ac6833 . (2016-08-24 06:01:04) on
Ubuntu Xenial using the Unix Makefile generator.
- Create a library
- Create a shared library and publicly conditionally (optimized | debug) link
it to that library
- Create an executable
- Link the executable to the shared library, thus creating a transitive
conditional dependency on the first library
Running CMake on this setup yields the following warning during generation:
--------------------------------------------------------------------------------------------------------
> ./cmake .
.
CMake Warning (dev) in CMakeLists.txt:
Policy CMP0022 is not set: INTERFACE_LINK_LIBRARIES defines the link
interface. Run "cmake --help-policy CMP0022" for policy details. Use the
cmake_policy command to set the policy and suppress this warning.
Target "testso" has an INTERFACE_LINK_LIBRARIES property which differs from
its LINK_INTERFACE_LIBRARIES properties.
INTERFACE_LINK_LIBRARIES:
$<$<NOT:$<CONFIG:DEBUG>>:testlib>
LINK_INTERFACE_LIBRARIES:
testlib
--------------------------------------------------------------------------------------------------------
CMakeLists.txt:
cmake_minimum_required(VERSION 2.8)
project(libtest_project)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
add_library(testlib STATIC testlib.cpp)
add_library(testso SHARED sharedlib.cpp)
target_link_libraries(testso PUBLIC optimized testlib)
add_executable(testexe exe.cpp)
target_link_libraries(testexe testso)
--------------------------------------------------------------------------------------------------------
Simplified stack trace:
cmGeneratorTarget (Target: testso)::GetLinkInterfaceLibraries("", target
testexe, usage requirements only)
TargetPropertyNode::Evaluate(testso, INTERFACE_SOURCES)
GeneratorExpressionContent
($<TARGET_PROPERTY:testso,INTERFACE_SOURCES>)::Evaluate()
cmCompiledGeneratorExpression
($<TARGET_PROPERTY:testso,INTERFACE_SOURCES>)::EvaluateWithContext()
cmCompiledGeneratorExpression
($<TARGET_PROPERTY:testso,INTERFACE_SOURCES>)::Evaluate()
processSources()
cmGeneratorTarget (Target: testexe)::GetSourceFiles(config: "")
cmGeneratorTarget (Target: testexe)::GetSourceFiles(config: "")
cmTargetTraceDependencies (Target: textexe)::ctor()
cmGeneratorTarget (Target: testexe)::TraceDependencies()
cmLocalGenerator (/src)::TraceDependencies()
cmGlobalGenerator::Compute()
cmake::Generate()
cmake::Run()
main()
--------------------------------------------------------------------------------------------------------
.or is this intended behavior?
Best regards
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Daniel Lüken
Spezialist Entwicklung
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80809 München
Tel.: +49 89 189311-35
Fax: +49 89 189311-20
Mail: daniel.lue...@bmw-carit.de
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