[CMake] Problem with SET_TARGET_PROPERTIES DEFINE_SYMBOL property

[Dan Mueller]

Thanks for your suggestion Filipe.

In my original email I didn't make it very clear that I have *multiple 
*targets and I only want to add a symbol definition for a *specific* 
target. From my understanding (and testing) the command ADD_DEFINITIONS 
adds a definition for *all* targets in the project.

I've decided to use CONFIGURE_FILE and explicitly declare #define 
${MY_SYMBOL} which will be filled in at configuration time (rather than 
build time).

Thanks everyone.

Dan


Filipe Sousa wrote:
> On Tuesday 04 April 2006 06:10, Dan Mueller wrote:
>   
>> Hi cmake users:
>>
>> I am trying to use cmake to define a symbol so that I can use the #if
>> syntax in C++.
>>
>> I have read the documentation for the SET_TARGET_PROPERTIES command and
>> it seems to me that there is a property called DEFINE_SYMBOL which sets
>> "... /a symbol that is defined when compiling C or C++ sources/"
>> (http://www.cmake.org/HTML/Documentation.html). However, when I use this
>> property it does *not *define the symbol. I am using CMake v2.2.3 with
>> Microsoft Visual Studio 7 .NET 2003 on a Win32 machine.
>>
>> FYI I can get the LINK_FLAGS property to work, but not the DEFINE_SYMBOL...
>>
>> Have I misunderstood something? Am I setting the property correctly? Any
>> help would be appreciated. My cmake file and source is below:
>>
>> Start CMakeLists.txt ====================================================
>> # Add Project
>> PROJECT(TestMain)
>>
>> # Setup output paths
>> SET(LIBRARY_OUTPUT_PATH ${CMAKE_SOURCE_DIR}/bin CACHE PATH "Single
>> output directory for building all libraries." FORCE)
>> SET(EXECUTABLE_OUTPUT_PATH ${CMAKE_SOURCE_DIR}/bin CACHE PATH "Single
>> output directory for building all executables." FORCE)
>>
>> # Add Executable
>> ADD_EXECUTABLE(TestMain TestMain.cxx)
>> *SET_TARGET_PROPERTIES(TestMain PROPERTIES DEFINE_SYMBOL "MY_SYMBOL")*
>>     
>
> ADD_DEFINITIONS(-DMY_SYMBOL)
>
>   
>> TARGET_LINK_LIBRARIES(TestMain TestMain)
>> End CMakeLists.txt ====================================================
>>
>> Start TestMain.cxx ====================================================
>> #include <iostream>
>>
>> int main(int argc, char * argv[])
>> {
>>     #if (MY_SYMBOL)
>>         std::cout << "MY_SYMBOL was defined." << std::endl;
>>     #else
>>         std::cout << "MY_SYMBOL was NOT defined." << std::endl;
>>     #endif
>> }
>> End TestMain.cxx ====================================================
>>
>> NOTE: TestMain.exe prints "MY_SYMBOL was NOT defined."
>>
>> Regards,
>>
>> Dan [d.mueller at qut.edu.au]
>>     
>
> fsousa at neptuno ~ $ cmake --help-command ADD_DEFINITIONS
> cmake version 2.3-20060330
>   ADD_DEFINITIONS
>        Adds -D define flags to the command line of C and C++ compilers.
>
>          ADD_DEFINITIONS(-DFOO -DBAR ...)
>
>        Adds flags to command line of C and C++ compilers.  This command can
>        be used to add any flag to a compile line, but the -D flag is accepted
>        most C/C++ compilers.  Other flags may not be as portable.
>
>
>   
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>
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-- 
Dan Mueller
PhD Candidate (02562065)
School of Engineering Systems (ES)
Faculty of Built Environment and Engineering (BEE)
Queensland University of Technology (QUT)
CRICOS No: 00213J

Email: d.mueller at qut.edu.au
Phone: +617 3864 9124
Mobile: +61 0401 451 850
Room: Gardens Point S903.11
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