CODEWITHSUNDEEP
compiler-errorsfortrangfortran
Randel
Randel

Reputation: 320

gfortran: compile source codes from hierarchically dependent subroutine files

I want to compile main.f90, and it depends on three subroutines in separate files. For the third subroutine, it also has three sub_subroutines.

  1. sub1.f
  2. sub2.f
  3. sub3_main.f sub3_sub1.f sub3_sub2.f sub3_sub3.f

Run the following code would produce a long error message as below.

gfortran main.f90 sub1.f sub2.f sub3_main.f sub3_sub1.f sub3_sub2.f sub3_sub3.f -o- test.exe

I searched and found that I may need flag -c, but I am not sure about the order of compiling, and then how to link object files into a standalone program. Or it is related to this question: how to compile multi-folder Fortran Project having interfaces, modules and subroutines.

Thanks in advance!

test.exe: In function `_fini':
(.fini+0x0): multiple definition of `_fini'
/usr/lib/gcc/i686-linux-gnu/4.6/../../../i386-linux-gnu/crti.o:(.fini+0x0): first defined here
test.exe: In function `__data_start':
(.data+0x0): multiple definition of `__data_start'
/usr/lib/gcc/i686-linux-gnu/4.6/../../../i386-linux-gnu/crt1.o:(.data+0x0): first defined here
test.exe: In function `__data_start':
(.data+0x4): multiple definition of `__dso_handle'
/usr/lib/gcc/i686-linux-gnu/4.6/crtbegin.o:(.data+0x0): first defined here
test.exe:(.rodata+0x4): multiple definition of `_IO_stdin_used'
/usr/lib/gcc/i686-linux-gnu/4.6/../../../i386-linux-gnu/crt1.o:(.rodata.cst4+0x0): first defined here
test.exe: In function `_start':
(.text+0x0): multiple definition of `_start'
/usr/lib/gcc/i686-linux-gnu/4.6/../../../i386-linux-gnu/crt1.o:(.text+0x0): first defined here
test.exe:(.rodata+0x0): multiple definition of `_fp_hw'
/usr/lib/gcc/i686-linux-gnu/4.6/../../../i386-linux-gnu/crt1.o:(.rodata+0x0): first defined here
test.exe: In function `main':
(.text+0x399): multiple definition of `main'
/tmp/ccwQ3UVQ.o:main.f90:(.text+0x20ee): first defined here
test.exe: In function `_init':
(.init+0x0): multiple definition of `_init'
/usr/lib/gcc/i686-linux-gnu/4.6/../../../i386-linux-gnu/crti.o:(.init+0x0): first defined here
/usr/lib/gcc/i686-linux-gnu/4.6/crtend.o:(.dtors+0x0): multiple definition of `__DTOR_END__'
test.exe:(.dtors+0x4): first defined here
/usr/bin/ld: error in test.exe(.eh_frame); no .eh_frame_hdr table will be created.
collect2: ld returned 1 exit status

Upvotes: 0

Views: 1557

Answers (1)

M. S. B.
M. S. B.

Reputation: 29381

You should be able to do either:

gfortran -c sub1.f
gfortran -c sub2.f
gfortran -c sub3_main.f sub3_sub1.f sub3_sub2.f sub3_sub3.f
gfortran sub1.o sub2.o sub3_main.o sub3_sub1.o sub3_sub2.o sub3_sub3.o  main.f90 -o text.exe

or

gfortran sub1.f sub2.f sub3_main.f sub3_sub1.f sub3_sub2.f sub3_sub3.f main.f90 -o text.exe

You should only have one program and any number of proceduers (subroutines and functions). The above assumes that sub3_main is a procedures and that your program in in main.f90.

Upvotes: 2

Related Questions