[CMake] Problem with ADD_CUSTOM_COMMAND & ARGS

[Eric Tellefsen]

Hi,

During one of my more complex migrations from Solaris make to CMake, I 
have run into a problem with an argument passed into the custom command.

A key part of this project generates CXX & HXX  source files from a series 
of .xsd files in project sub directories.  In order to reuse this 
functionality if need be, I have created a separate macro file for this 
task.

My project is constructed with a CMakeLists.txt file for the main project 
(a static library) and another CMakeLists.txt file in one of the 
subdirectories containing .xsd files.

My problem has to do with the ARGS section of the custom command. 
Specifically the 'legacy' Makefile uses an argument  --include-regex 
"#../../XML/Types/##"  in order to remove this prefix from the generated 
HXX files, where applicable.

While everything works fine with the legacy Makefile, it does not seem to 
work in my CMake Makefile.  Everything works with the exception that some 
of the generated HXX files still contain the "../../Types/" prefix, which 
breaks the subsequent source compilation as the headers with the 
"#../../XML/Types/##" prefix cannot be found by the compiler.   I'm 
guessing that this problem has something to do with the value being passed 
to the option --include-regex is not tracking correctly but I'm not sure 
why.

I have tried every possible permutation of fixing this problem, going as 
far as including the custom command in the body of the CMakeLists.txt file 
(for the subdirectory) and not using the macro.  All attempts to generate 
'correct' HXX files have failed up to this date.

Is there something I'm not getting?  I will include my macro as well as 
the relevant information from the calling CMakeLists.txt file below if 
that helps.

Thanks,

Eric

----------- Code which invokes macro
SET( STUBDIR ${CMAKE_BINARY_DIR}/Stubs )
SET( TYPE_XSD_DIR ${CMAKE_CURRENT_SOURCE_DIR} )
SET( TYPE_REGEX_FLAG "#../../XML/Types/##" )

XSDGenCXXSources( TypesOutputFiles
                    "${TYPE_REGEX_FLAG}"
                    "${TYPE_XSD_DIR}"
                    "${STUBDIR}"
                    "${CMAKE_CURRENT_SOURCE_DIR}"
                    )

----------- Macro -----------------------------
macro ( XSDGenCXXSources OUTPUT_FILES REGEX XSD_DIR OUTPUT_DIR Working_Dir 
)

    SET( XSD_EXE $ENV{CODE_SYNTHESIS_HOME}/bin/xsd )

    ADD_CUSTOM_COMMAND(
            OUTPUT  ${${OUTPUT_FILES}}
            COMMAND mkdir
            ARGS    -p ${OUTPUT_DIR}
            COMMAND ${XSD_EXE}
          ARGS    cxx-tree --generate-serialization --output-dir 
${OUTPUT_DIR} --include-regex " ${REGEX} " ${XSD_DIR}/*.xsd
            COMMENT "Generating CXX files from ${XSD_DIR} and placing them 
in ${OUTPUT_DIR}"
            WORKING DIRECTORY ${Working_Dir}
            )
endmacro ( XSDGenCXXSources )
~

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