Hi All,
I'm trying to use CheckFortranFunctionExists? to test for getarg which is failing on an Ubuntu 16.04 test machine and OS X test machine. The test I have put together is provided below in text form. The test for getarg fails, the executable 'bob' fails to link but the executable 'dave' links and runs as expected. The error from 'bob' is [ 75%] Linking Fortran executable bob Undefined symbols for architecture x86_64: "_getarg_", referenced from: _MAIN__ in src.f.o ld: symbol(s) not found for architecture x86_64 collect2: error: ld returned 1 exit status make[2]: *** [bob] Error 1 make[1]: *** [CMakeFiles/bob.dir/all] Error 2 make: *** [all] Error 2? The files used in text form: ================== CMakeLists.txt ===================== cmake_minimum_required(VERSION 3.4) project(getarg_prog VERSION 1.0.0 LANGUAGES Fortran) include(CheckFortranFunctionExists) check_fortran_function_exists(getarg HAVE_GETARG) add_executable(bob src.f) add_executable(dave dave.f) ====================================================== =================== src.f ========================= program TESTFortran external getarg call getarg() end program TESTFortran ================================================ ======================== dave.f ========================== PROGRAM test_getarg INTEGER :: i CHARACTER(len=32) :: arg DO i = 1, iargc() CALL getarg(i, arg) WRITE (*,*) arg END DO ======================================================== Can anyone explain why this is happening and how I would go about testing for the getarg function if I am doing it wrong. Thanks,
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