[CMake] (no subject)

[Michael Hertling]

On 06/06/2011 10:32 PM, dfurtney at cox.net wrote:
> Does CMake provide a way to get the list of objects going into a given target? I need such a list for a PRE_LINK custom command.

With the Makefile generators, you might use the RULE_LAUNCH_COMPILE
target property combined with a shell script to achieve your goal:

# CMakeLists.txt:
CMAKE_MINIMUM_REQUIRED(VERSION 2.8 FATAL_ERROR)
PROJECT(OBJECTS C)
SET(CMAKE_VERBOSE_MAKEFILE ON)
FILE(WRITE ${CMAKE_BINARY_DIR}/f.c "void f(void){}\n")
FILE(WRITE ${CMAKE_BINARY_DIR}/g.c "void g(void){}\n")
FILE(WRITE ${CMAKE_BINARY_DIR}/h.c "void h(void){}\n")
FILE(WRITE ${CMAKE_BINARY_DIR}/main.c "int main(void){return 0;}\n")
ADD_EXECUTABLE(main main.c f.c g.c h.c)
SET_TARGET_PROPERTIES(main PROPERTIES
    RULE_LAUNCH_COMPILE "sh ${CMAKE_SOURCE_DIR}/objects.sh <OBJECT> --")
ADD_CUSTOM_COMMAND(TARGET main PRE_LINK
    COMMAND @cat objects.txt COMMENT "Object files of target main:")

# objects.sh:
touch objects.txt
while [ "$1" != "--" ]; do
    if ! grep -q "$1" objects.txt; then
        echo $1 >> objects.txt
    fi
    shift
done
shift
exec "$@"

The objects.sh script collects all object files of the main target in
addition to compiling the respective source file, and the PRE_LINK
custom command may retrieve them from the objects.txt file later.

'hope that helps.

Regards,

Michael

PS: Please use a descriptive subject in your postings.