[CMake] CMake and include only libraries

[Theodore Papadopoulo]

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	Hi,

I'm trying to use cmake to install a include only library.
I'd like to use the export feature as described in

http://www.itk.org/Wiki/CMake/Tutorials/How_to_create_a_ProjectConfig.cmake_file

and I found the idea of using

set_target_properties(foo PROPERTIES PUBLIC_HEADER
"foo.h;${CMAKE_CURRENT_BINARY_DIR}/config.h")

nice. But in my case, I do not have any library to build...
All my attempts to create custom targets or library targets with only
headers fail.... So I'm left with using install(FILES ...) and forget
this export idea unless someone knows a trick...

Here is a sketch of my CMakelists.txt

SET(Utils_HEADERS ...)

INCLUDE(TestBigEndian)
TEST_BIG_ENDIAN(WORDS_BIGENDIAN)
CONFIGURE_FILE (${CMAKE_CURRENT_SOURCE_DIR}/Utils/config.h.in config.h
@ONLY)

SET(HEADERS)
FOREACH(file ${Utils_HEADERS})
    SET(HEADERS "${HEADERS};${CMAKE_CURRENT_SOURCE_DIR}/Utils/${file}")
ENDFOREACH()

# Those do not work
#ADD_LIBRARY(UtilsIncludes SHARED ${HEADERS}
${CMAKE_CURRENT_SOURCE_DIR}/Utils/config.h)
#ADD_CUSTOM_TARGET(UtilsIncludes All DEPENDS ${HEADERS}
#${CMAKE_CURRENT_SOURCE_DIR}/Utils/config.h.in)
SET_TARGET_PROPERTIES(UtilsIncludes PROPERTIES
                      PUBLIC_HEADER
"${HEADERS};${CMAKE_CURRENT_BINARY_DIR}/config.h")

INSTALL(TARGETS UtilsIncludes EXPORT  UtilsLibraryDepends
        LIBRARY DESTINATION lib
        PUBLIC_HEADER DESTINATION include/Odyssee++ COMPONENT dev)

Thank's in advance for any hint.

	All the best.

		Theo.
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