Linux fortran error

[melian]

Hello,
I recently installed Scientific Linux 5.5. I am a newbie. I tried to compile a very simple fortran code test1.f by only writing make test1 on the command window. Then, the following error came:

gcc test1.f -o test1
usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/crt1.o: In function '_start':
(.text+0x20): undefined reference to 'main'
tmp/cccpdmKU.o: In function 'MAIN__':
test1.f:(.text+0x1b): undefined reference to `_gfortran_set_std'
test1.f:(.text+0x50): undefined reference to `_gfortran_st_write'
test1.f:(.text+0x66): undefined reference to `_gfortran_transfer_character'
test1.f:(.text+0x72): undefined reference to `_gfortran_st_write_done'
test1.f:(.text+0x7c): undefined reference to `_gfortran_stop_numeric'
collect2: ld returned 1 exit status
make: *** test1 Error 1

Does anyone have any solution for that? I searched the net, somebody advised to change make.conf file by editing the LOADER=GCC with LOADER=GFORTRAN. But I couldnot find a similar file in my system.
Thanks in advance.

[henrikau]

Hi, this is a linker-error, perhaps the library-path is wrong?

Anyhow, could you try with gfortran instead? (might resolve some of the path-issues etc)

gfortran -std=legacy test1.f -o test1

Then, if that does not work, rename to f90 (force Fortran90 mode) and try again.

Finally, if things still doesn't work - could you post your code here?

[melian]

Thank you. It worked.
But do you know how I can correct this permanently? I will look for gfortran program files. Since I am new in Linux I couldnt figure where the program files are.
Thanks again

[henrikau]

I guess a permanent solution is to use gfortran

As to "gfortran program files" I assume you mean the libraries? I don' t know where they are stored (I'm not *that* into Fortran), but I guess /var/lib and /usr/include are a good place to start.

note: the -std=legacy will forcre gfortran to compile the files as Fortran-77 and in my (rather limited) experience, that makes a few strange bugs go away...

[melian]

I couldnt quite understand, but now it compiles correctly by only writing

make test1

Thank you.