CMakeMacroCreateFinalFile

Back

Sometimes it's faster (and the compiler might be able to optimize better) to include all source files of a project into one source file and compile only this one file instead of all files each one by one. This can be done with the macro CREATE_FINAL_FILE().

Usage is like this:

---

  SET(app_SRCS main.cpp app.cpp bar.c foo.c)
  OPTION(ENABLE_FINAL "Enable final all-in-one compilation.")
  IF(ENABLE_FINAL)
     CREATE_FINAL_FILE(_final.cpp ${_app_SRCS} )
     ADD_EXECUTABLE(foo _final.cpp)
  ELSE(ENABLE_FINAL)
     ADD_EXECUTABLE(foo ${app_SRCS} )
  ENDIF(ENABLE_FINAL)

---

This example creates an executable named "foo" from the sources main.cpp, app.cpp, bar.c and foo.c. If the option "ENABLE_FINAL" is enabled, these for files will be included in the file "_final.cpp" and only this will be compiled. Otherwise the four source files are compiled one by one as you know it. And here comes the macro:

---

  MACRO(CREATE_FINAL_FILE _filename)
     FILE(WRITE ${_filename} "//autogenerated file\n")
     FOREACH (_current_FILE ${ARGN})
        FILE(APPEND ${_filename} "#include \"${_current_FILE}\"\n")
     ENDFOREACH (_current_FILE)
  ENDMACRO(CREATE_FINAL_FILE _filename)

---

Back

---

CMake: [Welcome | Site Map]