gfortran
TLDR
Compile Fortran file
$ gfortran [source.f90] -o [output]
Compile with optimization$ gfortran -O3 [source.f90] -o [output]
Enable warnings$ gfortran -Wall [source.f90] -o [output]
Debug build$ gfortran -g [source.f90] -o [output]
Link math library$ gfortran [source.f90] -o [output] -lm
SYNOPSIS
gfortran [options] files...
DESCRIPTION
gfortran is the GNU Fortran compiler, part of GCC. It compiles Fortran 77, 90, 95, 2003, and 2008 standards to native executables.
The compiler provides extensive optimization, debugging support, and interoperability with C code. It benefits from GCC's mature infrastructure.
gfortran is the standard open source Fortran compiler for scientific computing.
PARAMETERS
FILES
Fortran source files (.f, .f90, .f95).-o FILE
Output filename.-c
Compile only, no linking.-g
Generate debug info.-O LEVEL
Optimization level (0-3).-Wall
Enable warnings.-l LIBRARY
Link library.--help
Display help information.
CAVEATS
Standard compliance varies by feature. Array bounds checking optional. Legacy code may need adaptation.
HISTORY
gfortran replaced g77 as GCC's Fortran compiler starting with GCC 4.0. It supports modern Fortran standards while maintaining compatibility with older code.
