On 09/16/2010 05:33 PM, Michael Wild wrote:
>
> On 16. Sep, 2010, at 17:13 , David Aldrich wrote:
>
>> Hi David
>>
>>> Something like this should work:
>>
>>> cmake_minimum_required(VERSION 2.8)
>>> project(MyExe)
>>
>>> add_subdirectory(../Kernel Kernel)
>>> add_subdirectory(../DynLibs DynLibs)
>>
>>> add_executable(MyExe exe.cxx)
>>> target_link_libraries(MyExe Kernel)
>>
>> I have a problem with add_executable(). Our Kernel library includes
>> main.cpp, so all our existing linker command does is to take libKernel.a and
>> make it an executable:
>>
>> g++ -o _gnuRelease/MyExe -ldl -Wl,-whole-archive,-export-dynamic
>> ../Kernel/_gnuRelease/libKernel.a
>>
>> So I have no source files to specify. Does 'exe.cxx' (above) have special
>> properties or is it just a placeholder? If the latter, how can I build an
>> executable with no source files specified?
>>
>> BR
>>
>> David
>
> There is none. The only way to do that is create an empty dummy file (using
> e.g. a combination of file(WRITE) and configure_file() to prevent recompiling
> after every CMake run).
Just for my curiosity: On *nix, I can see the following CMakeLists.txt work:
CMAKE_MINIMUM_REQUIRED(VERSION 2.8 FATAL_ERROR)
PROJECT(EXELIB C)
FILE(WRITE ${CMAKE_BINARY_DIR}/main.c "int main(void){return 0;}\n")
ADD_LIBRARY(main STATIC main.c)
ADD_EXECUTABLE(exe "")
SET_TARGET_PROPERTIES(exe PROPERTIES LINKER_LANGUAGE C)
TARGET_LINK_LIBRARIES(exe main)
Note the double quotes within ADD_EXECUTABLE(). The link line for exe is:
gcc -o exe -rdynamic libmain.a
I.e., rather the one David desires.
So, does this work by accident and possibly on *nix only?
Regards,
Michael
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