[CMake] Re: Convenience libraries

[Brad King]

John Ellson wrote:
> how do I reference a symbol defined 
> in CMakeLists.txt in another directory for a list of source files?
> 
> e.g. in lib/graph/CMakeLists.txt I have:
>    SET(graph_SRCS              attribs.c agxbuf.c edge.c graph.c 
> graphio.c lexer.c node.c parser.c refstr.c trie.c
>    )
> and I want to expand this in lib/gvc/CMakeLists.txt

As long as lib/gvc is processed after lib/graph:

GET_DIRECTORY_PROPERTY(
   graph_SRCS
   DIRECTORY ${PROJECT_SOURCE_DIR}/lib/graph
   DEFINITION graph_SRCS
)

However you will have to reference the sources by their full path so 
that they can be found in the other directory.

You could also create lib/graph/sources.cmake with this code:

SET(graph_SRCS
   ${PROJECT_SOURCE_DIR}/lib/graph/attribs.c
   ${PROJECT_SOURCE_DIR}/lib/graph/agxbuf.c
   ...)

and then INCLUDE it in both CMakeLists.txt files.

-Brad