[CMake] Get configuration-dependant LOCATION property

[Michael Wild]

On 5. Oct, 2010, at 3:52 , Michael Hertling wrote:

> On 10/04/2010 11:15 PM, Mateusz Loskot wrote:
>> On 04/10/10 14:24, Michael Hertling wrote:
>>> On 10/04/2010 10:53 AM, Mateusz Loskot wrote:
>>>> On 04/10/10 07:33, J Decker wrote:
>>>>> CMAKE_INSTALL_CONFIG_NAME I don't know if there's a simple flag like
>>>>> 'project supports multiple targets' so I have an if(MSVC) set(
>>>>> MULTI_TARGET) endif()  .... if( MULTI_TARGET ) Install( targets ...
>>>>> ${CMAKE_INSTALL_CONFIG_NAME ) else() isntall( ... ${CMAKE_BUILD_TYPE}
>>>> 
>>>> 
>>>> I need it before firing up install procedures.
>>>> I build.
>>>> I run tests (here I need to know location of build output per target).
>>> 
>>> Have you already taken a look at ADD_TEST()'s generator expressions like
>>> $<TARGET_FILE_DIR:tgt>? AFAIK, they've been introduced quite exactly to
>>> meet requirements such as yours.
>> 
>> Hmm, I've seen this expressions, but I'm not sure how it can be useful
>> because the expressions are used to generate test input.
>> 
>> My problem is about getting property to generate environment
>> for test before it is executed:
>> 
>> In one subtree of my sources, I have mylib target building mylib.dll
>> In another subtree, I have test. Next, I build and run test:
>> 
>> add_executable(mytest test.cpp)
>> 
>> target_link_libraries(mytest mylib_import.lib)
>> 
>> add_test(mytest ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/mytest)
>> 
>> set_tests_properties(mytest PROPERTIES
>>  ENVIRONMENT "PATH=c:\path\to\dir\with\mylib.dll\")
>> 
>> I need to figure out this: "c:\path\to\dir\with\mylib.dll\"
> 
> You might consider to use a script as a test driver which takes
> the desired path and the test executable as parameters, e.g.
> 
> ADD_TEST(mytest
>    testdriver $<TARGET_FILE_DIR:mylib> $<TARGET_FILE:mytest>)
> 
> with testdriver setting the PATH and executing mytest.
> 
> Regards,
> 
> Michael

Ah, yes, this is even better than my idea of configuring. So, you could have a CMake script like the following:

testdriver.cmake
----------------
# check arguments LIBDIR, TESTEXE and WIN32
foreach(var LIBDIR TESTEXE WIN32)
  if(NOT DEFINED ${var})
    message(FATAL_ERROR "${var} not defined")
  endif()
endforeach()

# on Windows set PATH
if(WIN32)
  set($ENV{PATH} "${LIBDIR};$ENV{PATH}")
endif(WIN32)

# run TESTEXE
execute_process(
  COMMAND "${TESTEXE}"
  RESULT_VARIABLE result)
if(result)
  message(FATAL_ERROR "Running ${TESTEXE} failed")
endif()
# EOF

CMakeLists.txt
--------------
...
add_test(NAME bar COMMAND
  "${CMAKE_COMMAND}" 
    -DLIBDIR=$<TARGET_FILE_DIR:foo> -DTESTEXE=$<TARGET_FILE:bar> -DWIN32=${WIN32}
    -P "${CMAKE_CURRENT_SOURCE_DIR}/testdriver.cmake"
  )
...
# EOF

I hope this helps

--
There is always a well-known solution to every human problem -- neat, plausible, and wrong.
H. L. Mencken

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