https://gcc.gnu.org/bugzilla/show_bug.cgi?id=32957
--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- > So is this fixed now? I have spotted some new tests requiring c_int: --- ../_clean/gcc/testsuite/gfortran.dg/bind_c_usage_24.f90 2018-02-18 00:40:36.000000000 +0100 +++ ../p_work/gcc/testsuite/gfortran.dg/bind_c_usage_24.f90 2018-05-12 16:01:26.000000000 +0200 @@ -30,9 +30,10 @@ contains end module m program test + use iso_c_binding use m implicit none - integer :: val + integer(c_int) :: val val = 4 call c_proc (.false._c_bool) --- ../_clean/gcc/testsuite/gfortran.dg/internal_dummy_4.f08 2018-02-18 00:40:40.000000000 +0100 +++ ../p_work/gcc/testsuite/gfortran.dg/internal_dummy_4.f08 2018-05-12 16:01:29.000000000 +0200 @@ -39,11 +39,11 @@ end module test_mod program main use test_mod implicit none - integer :: a + integer(c_int) :: a a = 33 - call test_sub (one, a, 7*33) + call test_sub (one, a, 7_c_int*33_c_int) a = 23 - call test_func(two, a, -123*23) + call test_func(two, a, -123_c_int*23_c_int) contains subroutine one(x) bind(c) integer(c_int),intent(inout) :: x There is also a problem with gfortran.dg/bind_c_usage_10.f03 I have been unable to fix: /opt/gcc/_clean/gcc/testsuite/gfortran.dg/bind_c_usage_10.f03:66:31: integer(c_int) function func4() 1 Error: FUNCTION result func4 can't be of type INTEGER(4) in FUNCTION func4 at (1) /opt/gcc/_clean/gcc/testsuite/gfortran.dg/bind_c_usage_10.f03:59:31: integer(c_int) function func3() bind(c, name="myFunc3") 1 Error: FUNCTION result func3 can't be of type INTEGER(4) in FUNCTION func3 at (1) /opt/gcc/_clean/gcc/testsuite/gfortran.dg/bind_c_usage_10.f03:52:31: integer(c_int) function func2() 1 Error: FUNCTION result func2 can't be of type INTEGER(4) in FUNCTION func2 at (1) /opt/gcc/_clean/gcc/testsuite/gfortran.dg/bind_c_usage_10.f03:45:31: integer(c_int) function func1() bind(c, name="myFunc1") 1 Error: FUNCTION result func1 can't be of type INTEGER(4) in FUNCTION func1 at (1)