CheckIncludeFiles: how to use?

Hi all,

Maybe it's because of a partially sleepless night, but I can't seem to
figure out how I should use check_include_files().

According to the docs (and the implementation) this macro should be used
as:

  CHECK_INCLUDE_FILES(INCLUDE VARIABLE)

where INCLUDE should contain the list of files to include.
Problem is, however, that the following doesn't work:

  CHECK_INCLUDE_FILES(unistd.h stdio.h var)

because this will assign "unistd.h" to the variable INCLUDE and
"stdio.h" to the variable VARIABLE.

The following also doesn't work:

  SET(files unistd.h stdio.h)
  CHECK_INCLUDE_FILES(files var)

because the variable INCLUDE is not handled as the name of the list
containing the header files, but as the name of the header file itself.

Am I missing something here, or is this a bug in check_include_files()?

Best regards,
Marcel Loose.

if(string MATCHES regex) question

Hi all,

In a number of standard CMake modules I encountered the following line:

  IF("${VARIABLE}" MATCHES "^${VARIABLE}$")

Can anyone explain the rationale of this conditional to me. To my
cluttered mind this seems to be an "always-true" condition.

Best regards,
Marcel Loose.

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Re: CheckIncludeFiles: how to use?

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Re: Problem with generated source and header files

>
> So, in general, when using globbing, YOU are responsible for rerunning
> CMake whenever you've added a source file. Otherwise you run the  
> risk of
> the new file not being compiled. Furthermore, you might accidentally
> compile sources that were just lying around in your directory as test
> code. Deletion of sources can also cause interesting effects if you
> create a library, because the object will remain in that library until
> you (manually) remove and recreate the library.
>
> I hope my examples convinced you enough that globbing is (in  
> general) a
> bad idea.
>
So is it common practice among users of CMake to manually create and  
maintain a list of all files that are to be compiled, even if such a  
list is very large and may involve several directories and  
subdirectories?
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Re: Problem with generated source and header files

>> I hope my examples convinced you enough that globbing is (in general) a
>> bad idea.
>>
> So is it common practice among users of CMake to manually create and
> maintain a list of all files that are to be compiled, even if such a list is
> very large and may involve several directories and subdirectories?
>
I do with all of my projects. The thing is that I generally add only 2
or 4 files at a time so its not like this is a lot of work.

John
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appending srcs to custom_target, or doxygen support

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Re: appending srcs to custom_target, or doxygen support

On Wed, Jul 01, 2009 at 11:03:10AM -0500, Mark Lohry wrote:
> in ./src/lib1/cmakelists.txt I have:
> 
> if(DOXYGEN_EXECUTABLE AND UNIX)
>   IF(EXISTS ${PROJECT_SOURCE_DIR}/${DOXYGEN_CONFIG_FILE})
>     message( "***** Doxygen config file found *****" )
>     SET(DOXYFILE_FOUND true)
>     ADD_CUSTOM_TARGET( doc ${DOXYGEN_EXECUTABLE}
>       "${PROJECT_SOURCE_DIR}/${DOXYGEN_CONFIG_FILE}" )
>     install(DIRECTORY ${CMAKE_SOURCE_DIR}/doc/ DESTINATION ${docdir}/html)
>   ENDIF(EXISTS ${PROJECT_SOURCE_DIR}/${DOXYGEN_CONFIG_FILE})
> endif(DOXYGEN_EXECUTABLE AND UNIX)
> 
> 
> which works fine for just that one directory, but placing that same section
> in ./src/lib2,3,4.. gives an error "target doc already defined". I'd rather
> not have a custom doc target (make doc_lib1, make doc_lib2...) for each
> library. So is there any facility to do something like  "if( exists
> custom_target doc ) then append( command to doxy the next library)"?

Look at if(TARGET ...) and add_custom_command(... APPEND). I'm not sure
the APPEND part will work because there are issues with custom_commands
across multiple directories (I don't remember the details, but the
archives do).

tyler
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Re: appending srcs to custom_target, or doxygen support

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Re: if(string MATCHES regex) question

2009/7/1 Marcel Loose <loose@...>:
> Hi all,
>
> In a number of standard CMake modules I encountered the following line:
>
>  IF("${VARIABLE}" MATCHES "^${VARIABLE}$")
>
> Can anyone explain the rationale of this conditional to me.

The rational no but ....

> To my cluttered mind this seems to be an "always-true" condition.

this is definitely not always true.
The variable your are testing may contain "un-evaluated" var
or some special regex character( *, ?, ...)

See attached example, you may test it with
$ cmake -P matches.cmake
MATCHES -- MYVAR = A good var
Look that one = double-dollar = blah / single-dollar = MYVAR2
NO MATCHES ** MYVAR = MYVAR2
$

However I have no such usage currently 

--

-- 
Erk
Membre de l'April - « promouvoir et défendre le logiciel libre » -
http://www.april.org

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FindxxWidgets.cmake: wrong wxWidgets_INCLUDE_DIRS on UNIX

Hi,

I am trying to write a CMakeLists.txt file on a Linux Ubuntu 9.04 
platform. I'd like to test the presence of wxwidgets on the system, and 
  use the include files of wxwidgets. This file is very simple at the 
moment:

// BEGINNING OF CMakeLists.txt

set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR})
find_package(wxWidgets COMPONENTS base core REQUIRED)
include_directories(${wxWidgets_INCLUDE_DIRS})
add_definitions(${wxWidgets_DEFINITIONS})
message(STATUS ${wxWidgets_INCLUDE_DIRS})

// END OF CMakeLists.txt

When I run "cmake ." in a terminal window, I get the following output:

-- /usr/lib/wx/include/gtk2-unicode-release-2.8/usr/include/wx-2.8
-- Configuring done
-- Generating done

The first line gives the value of "wxWidgets_INCLUDE_DIRS" which is 
obviously wrong. It seems 2 paths have been concatenated without white 
space. I think it should be something like 
"/usr/lib/wx/include/gtk2-unicode-release-2.8 /usr/include/wx-2.8".

All the best,
Florent
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