LinuxQuestions.org - FORTRAN question when compiling undefined reference to `cyg_profile_func

I am trying to call 2 seperate 'C' program from a FORTRAN program and I am getting the following error.

gfortran tcookbwtestm3.f95 -o tookbwtestx.exe
tcookbwtestm3.f95:92.39:

subroutine cyg_profile_func_enter(dest,n) bind(C)
1
Warning: Variable 'dest' at (1) is a parameter to the BIND(C) procedure 'cyg_profile_func_enter' but may not be C interoperable
tcookbwtestm3.f95:92.41:

subroutine cyg_profile_func_enter(dest,n) bind(C)
1
Warning: Variable 'n' at (1) is a parameter to the BIND(C) procedure 'cyg_profile_func_enter' but may not be C interoperable
tcookbwtestm3.f95:99.38:

subroutine cyg_profile_func_exit(dest,n) bind(C)
1
Warning: Variable 'dest' at (1) is a parameter to the BIND(C) procedure 'cyg_profile_func_exit' but may not be C interoperable
tcookbwtestm3.f95:99.40:

subroutine cyg_profile_func_exit(dest,n) bind(C)
1
Warning: Variable 'n' at (1) is a parameter to the BIND(C) procedure 'cyg_profile_func_exit' but may not be C interoperable
/tmp/ccJa3pbB.o: In function `MAIN__':
tcookbwtestm3.f95.text+0xc1): undefined reference to `cyg_profile_func_enter'
tcookbwtestm3.f95.text+0x3d0): undefined reference to `cyg_profile_func_exit'
collect2: ld returned 1 exit status

Now the 'C' routines are in a library somewhere and making that part work will be passed off to another.There still seems to be some issues with the Parse/Unparse routines that the other team are working on. I am simply trying to create a 'manual' program that can be used by the other team so that they can add the 'C' calls to all FORTRAN compiles automatically.

The Fortran code is:

cat tcookbwtestm3.f95
!>>########################################################################
!>>
!>> This routine will be used in testing the BlackWhitelistSelector as
!>> part of the ROSE TU-Darmstadt modification.
!>>
!>> This is a MANUAL version; meaning that all changed necessary for testing
!>> this within the BlackWhitelistSelector modifier have been included
!>> within this program.
!>>
!>> The point is to use this as the template of what BlackWhitelistSelector
!>> needs to insert within existing Fortran code
!>>
!>> Thanks Thomas G Cook
!>>
!>>########################################################################

!>> Add

! IMPLICIT NONE

module c_func

IMPLICIT NONE

!>> We need to add the following variables; they are used when
!>> FORTRAN calls C and are needed to keep the variables alligned
!>> =============================================================
!>>
!>> This SHOULD BE REPLACED by using the use, intrinsic :: iso_c_binding
!>>
!>> Unfortunately within the current environment the above value is
!>> WRONG
!>>
!>>########################################################################

! use, intrinsic :: ISO_C_BINDING

!>> The supplied variables in ISC_C_BINDING.f03 are incorrect
!>> =========================================================

!>> Here are the correct values

integer :: c_ptr
integer :: c_funptr
integer, parameter :: c_int = 4
integer, parameter :: c_short = 2
integer, parameter :: c_long = 4
integer, parameter :: c_long_long = 8
integer, parameter :: c_signed_char = 1
integer, parameter :: c_size_t = 4
integer, parameter :: c_intmax_t = 7
integer, parameter :: c_intptr_t = 8
integer, parameter :: c_int8_t = 1
integer, parameter :: c_int16_t = 2
integer, parameter :: c_int32_t = 4
integer, parameter :: c_int64_t = 8
integer, parameter :: c_int_least8_t = 1
integer, parameter :: c_int_least16_t = 2
integer, parameter :: c_int_least32_t = 4
integer, parameter :: c_int_least64_t = 8
integer, parameter :: c_int_fast8_t = 1
integer, parameter :: c_int_fast16_t = 2
integer, parameter :: c_int_fast32_t = 4
integer, parameter :: c_int_fast64_t = 8
real, parameter :: c_float = 4
real, parameter :: c_double = 8
real, parameter :: c_long_double = 16
integer, parameter :: c_float_complex = c_float
integer, parameter :: c_double_complex = c_double
integer, parameter :: c_long_double_complex = c_long_double
integer, parameter :: c_bool = 24
integer, parameter :: c_char = 1

character, parameter :: c_null_char = char(0) !C’\0’
character, parameter :: c_alert = achar(7) !C’\a’
character, parameter :: c_backspace = achar(8) !C’\b’
character, parameter :: c_form_feed = achar(12)!C’\f’
character, parameter :: c_new_line = achar(10)!C’\n’
character, parameter :: c_carriage_return = achar(13) !C’\r’
character, parameter :: c_horizontal_tab = achar(9) !C’\t’
character, parameter :: c_vertical_tab = achar(11) !C’\v’

!>> 'C' library function being invoked.
!>> ===================================

character (30) :: str_1
integer, parameter :: call_site = 4
integer, parameter :: n = 30

INTERFACE

subroutine cyg_profile_func_enter(dest,n) bind(C)
! use iso_c_binding, only: c_char, c_size_t
import
character (kind=c_char), intent(out) :: dest(*)
integer (c_size_t), value, intent(in) :: n
end subroutine cyg_profile_func_enter

subroutine cyg_profile_func_exit(dest,n) bind(C)
! use iso_c_binding, only: c_char, c_size_t
import
character (kind=c_char), intent(out) :: dest(*)
integer (c_size_t), value, intent(in) :: n
end subroutine cyg_profile_func_exit

end INTERFACE

end module c_func

!>> add

program tcookbwtestm

!>> Add

use c_func

!>> Initialize str to blanks
!>> ========================

str_1 = repeat(' ',30)
str_1 = 'this_fn'

call cyg_profile_func_enter(str_1, call_site)

print *, ' '
print *, ' cyg_profile_func_enter '
print *, '============'
print *, ' '

!>> ADD

print *, ' '
print *, ' This is test code for BlackWhitelistSelector Fortran '
print *, ' ==================================================== '
print *, ' '

!>> add

call cyg_profile_func_exit(str_1,call_site)

print *, ' '
print *, ' cyg_profile_func_exit '
print *, '============'
print *, ' '

!>> ADD

END PROGRAM tcookbwtestm

Yes, I know I should be using an ISO_C_BINDIN>G statement but you cannot use what you do not have.

Thank you to everyone