[CMake] Only install file if it does not exist?

[Bob Tanner]

On 2009-09-10 01:12:43 -0500, Eric Noulard 
<eric.noulard at gmail.com> said:

> 0)  Write your parameterized  CMake script CopyIfNotExists.cmake.in
> 
> 1)  CONFIGURE_FILE(CopyIfNotExists.cmake.in CopyIfNotExists.cmake)
>      This step will replace appropriate vars in CopyIfNotExists.cmake.in
>      with value coming from your current config.
> 
> 2)  INSTALL(SCRIPT CopyIfNotExists.cmake)

Thank you for your help!

I tried this approach.

CMakeLists.txt

INSTALL (SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/CopyIfNotExists.cmake)

CopyIfNotExists.cmake

MACRO (COPY_IF_NOT_EXISTS _SRC _DEST)
	MESSAGE ("Copy ${CMAKE_CURRENT_SOURCE_DIR}/${_SRC} to 
${CMAKE_INSTALL_PREFIX}/${_DEST}")
	IF (NOT EXISTS ${CMAKE_INSTALL_PREFIX}/${_DEST})
		EXECUTE_PROCESS (COMMAND ${CMAKE_COMMAND} -E copy 
${CMAKE_CURRENT_SOURCE_DIR}/${_SRC}
                                                          
${CMAKE_INSTALL_PREFIX}/${_DEST})
	ENDIF (NOT EXISTS ${CMAKE_INSTALL_PREFIX}/${_DEST})
ENDMACRO (COPY_IF_NOT_EXISTS _SRC _DEST)

COPY_IF_NOT_EXISTS ("sample_features" "etc/features")

The problem is ${CMAKE_CURRENT_SOURCE_DIR} is set to the out-of-source 
build directory.

Is this why you said to use a parameterized  cmake script?

-- 
Bob Tanner <tanner at real-time.com>                  | Phone : (952 943-8700
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