Hey Andrew and Paul, Thanks for the quick response and pointing to the extensions. I overlooked the GCC extensions part. Thanks for explaining further and sharing the links.
Naveen Yadav On Tue, Dec 30, 2025 at 2:42 PM Paul Richard Thomas < [email protected]> wrote: > Hi Andrew and Naveen, > > pault@fedora:~/prs/pdt$ gfortran ../complex.f90 -std=f2018 > ../complex.f90:6:6: > > 6 | z = COMPLEX(1.0,2.0) > | 1 > Error: Function ‘complex’ at (1) has no IMPLICIT type > ../complex.f90:9:6: > > 9 | z = COMPLEX(a, b) > | 1 > Error: Function ‘complex’ at (1) has no IMPLICIT type > > The result is the same with -std=f95. > > Regards > > Paul > > > On Tue, 30 Dec 2025 at 07:00, Andrew Pinski < > [email protected]> wrote: > >> On Mon, Dec 29, 2025 at 10:50 PM Naveen Yadav via Gcc <[email protected]> >> wrote: >> > >> > Dear developers, >> > >> > I am using GNU Fortran (GCC) 15.2.1 20251211 (Red Hat 15.2.1-5): >> > >> > The following program: >> > >> > >> **************************************************************************************************** >> > PROGRAM test >> > IMPLICIT NONE >> > REAL :: a = 1.0, b=1.0 >> > COMPLEX:: z >> > >> > z = COMPLEX(1.0,2.0) >> > PRINT*, z >> > >> > z = COMPLEX(a, b) >> > PRINT*, z >> > >> > END PROGRAM test >> > >> **************************************************************************************************** >> > >> > works with gfortran. However, the Intel compiler (from oneApi) throws a >> > compile error: >> > >> > test.f90(6): error #6404: This name does not have a type, and must have >> an >> > explicit type. [COMPLEX] >> > z = COMPLEX(1.0,2.0) >> > ----^ >> > compilation aborted for test.f90 (code 1) >> > >> > It is because COMPLEX is the name of a type and CMPLX is an intrinsic >> > function. The behaviour of the Intel compiler is the correct one. I hope >> > this will be updated in a future release. >> >> See >> https://gcc.gnu.org/onlinedocs/gcc-15.2.0/gfortran/COMPLEX.html#index-COMPLEX >> ``` >> Standard: >> GNU extension >> ``` >> >> Thanks, >> Andrew >> >> > >> > Best regards >> > Naveen Yadav >> >
