[CMake] Native Pathsupport under Windows

[James Bigler]

On Oct 23, 2007, at 7:13 AM, Torsten Martinsen wrote:

> alexander at camek.de <> wrote:
>
>>> FILE(TO_NATIVE_PATH ...)
>>
>> When I do a FILE(TO_NATIVE_PATH ${CMAKE_CURRENT_BINARY_DIR} RESULT)
>> and then use ${RESULT} I get the whole again with slashes.
>> So I can't use that with custom_command:
>> ADD_CUSTOM_COMMAND(...
>> COMMAND copy ${RESULT}\\image.h+${RESULT}\\test.h ${RESULT}\\image.h
>> VERBATIM)
>
> To copy files, use "${CMAKE_COMMAND} -E copy".

He doesn't just want to copy files, he wants to concatenate two files  
(copy file1+file2 destfile).  I doesn't look like cmake provides a  
built in "cmake -E" command for that.

One possibility is to use a separate cmake script to do the  
concatenation and run it as a command:

cmake_concatenate.cmake

EXECUTE_PROCESS(      COMMAND      ${CMAKE_COMMAND} -E copy ${FILE1} $ 
{DEST_FILE})

FILE(READ ${FILE2} file2_contents)
FILE(APPEND ${DEST_FILE} ${file2_contents})

########################
call it from regular CMakeLists.txt file

    COMMAND ${CMAKE_COMMAND}
    ARGS -P cmake_concatenate.cmake -DFILE1:STRING=${RESULT}/image.h - 
DFILE2:STRING=${RESULT}/test.h -DDEST_FILE:STRING=${RESULT}/image.h

In this particular case the destination and the first source file are  
the same, so a modified cmake_concatenate.cmake file could be more  
appropriate.

James