On Saturday 16 January 2010, Christoph Cullmann wrote:
> Hi,
>
> I try to install a flex generated file: (lex.loopmap_.cpp)
>
> CMakeLists.txt excerpt:
>
> set (cfg_cfiles_install
> files
> conmap.cpp
> loopmap.cpp
> regmap.cpp
> mapping.cpp
> lex.loopmap_.cpp
> paggdl.cpp
> scc.cpp
> sort.cpp
> sort_exp.cpp
> )
>
> # install some source files
> install(FILES ${cfg_cfiles_install} DESTINATION ${CFGDIR_C})
>
> # targets to refresh the scanner
> ADD_CUSTOM_COMMAND(
> OUTPUT "lex.loopmap_.cpp"
> COMMAND flex ARGS -8 -Ploopmap_ -olex.loopmap_.cpp map.lex
> DEPENDS "map.lex"
> WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
>
>
> But CMake doesn't call flex and fails at install.
Because there is no target which needs the generated files.
You could use add_custom_target(... ALL ...) instead of add_custom_command(),
then it will always be built.
Alex
> How do I tell it the dependency to generate the file on demand if not there
> or the .lex was changed?
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