CMakeMakeAbsPaths.cmake

example.cmake

function(add_to_list variable_name)
  #variable_name holds the name of the variable that we need to set
  #so ${variable} == name, ${${variable}} == contents of said variable
  message(STATUS "adding to variable ${variable_name}")
  set(srcs )
  foreach(source_file ${ARGN})
    list(APPEND srcs "${CMAKE_CURRENT_SOURCE_DIR}/${source_file}")
  endforeach()
  #Functions have local scope so we need to set the callers version of the
  #variable to what our version has.
  #Note the double dereference to get the contents of
  #the variable whose name we are given
  set(${variable_name} ${${variable_name}} ${srcs} PARENT_SCOPE)
endfunction()



set(srcs ${CMAKE_CURRENT_SOURCE_DIR}/a)
add_to_list(srcs b c d e f g)
message(FATAL_ERROR "srcs: ${srcs}")