[CMake] Generating source file one step before linking

[Doug]

Perhaps this is what you're looking for:
http://www.cmake.org/cmake/help/v2.8.8/cmake.html#command:add_custom_command

For example, this command copies a set of libraries into a directory:
if(WIN32)
  foreach(ITEM ${DEP_SHARED_LIBRARIES})
    add_custom_command(TARGET mytarget PRE_BUILD COMMAND ${CMAKE_COMMAND}
-E copy ${ITEM} .  WORKING_DIRECTORY ${PROJECT_BINARY_DIR} COMMENT "Copying
${ITEM} to ${PROJECT_BINARY_DIR}")
  endforeach()
endif()

You could use the PRE_LINK key and what ever your custom command is I
expect.

~
Doug.

On Thu, Jun 14, 2012 at 4:59 PM, Johannes Bauer <dfnsonfsduifb at gmx.de>wrote:

> Dear list,
>
> I'd like to know if the following is possible: in my old buildsystem
> (that I'm trying to convert to cmake) there is a script which runs just
> before the linking stage. It examines the created objects and then
> creates a source-file which needs to be linked in. The way this was done
> before is something like this (pseudo-Makefile syntax):
>
> execut: $(OBJS)
>        ./generate_code
>        gcc $(LDFLAGS) $(OBJS) generated.c -o execut
>
> .c.o:
>        gcc -c blah
>
>
> Is it possible to achieve something similar with cmake? I've read the
> FAQ about generating code, but I do not know how to control the
> dependencies (i.e. at which stage it is executed).
>
> Best regards,
> Johannes
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