But my recollection is that if you type gcc at the command line the computer doesn't say not found
The response you get depends on the shell you are using. Most will say:
Code:
[strand.560] $ gcc
ksh: gcc: not found
how can I modify freebsd to include gfortran.
I don't run FreeBSD 12, but it looks like gcc11 is the most recent gcc suite available on FreeBSD 12.x. So install it with
sudo pkg install gcc11. If
sudo doesn't work, just do it while logged in as root. If gcc11 is not available, try gcc10...
It appears I can check to see what version of gcc is installed default using the command gcc -v.
That will work on Linux, but not on FreeBSD. The gcc compilers on FreeBSD all have an integer suffix on their name to identify the version (it allows multiple version of gcc to co-exist). Use
ls -lad /usr/local/bin/gcc?? or
ls -lad /usr/local/bin/gfortran??
gfortran is a modern compiler, and recognises many
file name extensions, including .f, .for, .ftn, .f90, .f95, .f03 and .f0. It is backwards compatible with Fortran 77.
Is there a way to add gcc 7.5.0 to bsd?
There may be, but gcc7.5 is several years old and not currently supported on FreeBSD. You would probably have to acquire and compile it from source. It may have problems. You don't want it. You want a current (not "devel") package, built, maintained, patched, and provided freely by a team of experts.
ftoc converts fortran code to c . it is not a compiler.
Quite so. You convert the Fortran 77 to C and then use the C compiler of your choice. Here is a simple example of how to compile a single Fortran 77 source file (I'm using the native LLVM C compiler here, but it does not matter which C compiler I use):
Code:
[strand.628] $ cat xx.f
write(6,1000)
1000 format("Hello world")
stop
end
[strand.629] $ f2c xx.f >xx.c
xx.f:
MAIN:
[strand.630] $ cc -I /usr/local/include -o xx xx.c /usr/local/lib/libf2c.a -lm
[strand.631] $ ./xx
Hello world
For more complex sets of source code files you would be likely to modify the configuration of
make(1) to correctly manage the compiling and linking processes.
Don't ignore the f2c option. If you have a one-off issue to get a Fortran 77 application compiled and running, it's a serious contender. Performance of the resultant executable may not be optimal. If you care about that, then gfortran and lfortran are quite likely to be superior.
