FC(I) 8/20/73 FC(I)
fc - fortran compiler
fc [ -c ] sfile1.f ... ofile1 ...
Fc is the UNIX Fortran compiler. It accepts three types of
Arguments whose names end with `.f' are assumed to be
Fortran source program units; they are compiled, and the
object program is left on the file sfile1.o (i.e. the file
whose name is that of the source with `.o' substituted for
Other arguments (except for
-c) are assumed to be either
loader flags, or object programs, typically produced by an
earlier fc run, or perhaps libraries of Fortran-compatible
routines. These programs, together with the results of any
compilations specified, are loaded (in the order given) to
produce an executable program with name a.out.
The -c argument suppresses the loading phase, as does any
syntax error in any of the routines being compiled.
The following is a list of differences between fc and ANSI
standard Fortran (also see the BUGS section):
1. Arbitrary combination of types is allowed in
expressions. Not all combinations are expected to be
supported at runtime. All of the normal conversions
involving integer, real, double precision and complex
2. DEC's implicit statement is recognized. E.g.: implicit
3. The types doublecomplex, logical*1, integer*1,
integer*2 and real*8 (double precision) are supported.
4. & as the first character of a line signals a
5. c as the first character of a line signals a comment.
6. All keywords are recognized in lower case.
7. The notion of `column 7' is not implemented.
8. G-format input is free form- leading blanks are
ignored, the first blank after the start of the number
terminates the field.
9. A comma in any numeric or logical input field
terminates the field.
10. There is no carriage control on output.
11. A sequence of n characters in double quotes `"' is
equivalent to n h followed by those characters.
12. In data statements, a hollerith string may initialize
an array or a sequence of array elements.
13. The number of storage units requested by a binary read
must be identical to the number contained in the record
14. If the first character in an input file is ``#'', a
preprocessor identical to the C preprocessor is called,
which implements ``#define'' and ``#include''
preprocessor statements. (See the C reference manual
for details.) The preprocessor does not recognize
Hollerith strings written with nh.
In I/O statements, only unit numbers 0-19 are supported.
Unit number n refers to file fortnn; (e.g. unit 9 is file
`fort09'). For input, the file must exist; for output, it
will be created. Unit 5 is permanently associated with the
standard input file; unit 6 with the standard output file.
Also see setfil (III) for a way to associate unit numbers
with named files.
file.f input file
a.out loaded output
f.tmp temporary (deleted)
/usr/fort/fc1 compiler proper
/lib/fr0.o runtime startoff
/lib/filib.a interpreter library
/lib/libf.a builtin functions, etc.
/lib/liba.a system library
ANSI standard, ld (I) for loader flags
Also see the writeups on the precious few non-standard
Fortran subroutines, ierror and setfil (III)
Compile-time diagnostics are given in English, accompanied
if possible with the offending line number and source line
with an underscore where the error occurred. Runtime
diagnostics are given by number as follows:
1 invalid log argument
2 bad arg count to amod
3 bad arg count to atan2
4 excessive argument to cabs
5 exp too large in cexp
6 bad arg count to cmplx
7 bad arg count to dim
8 excessive argument to exp
9 bad arg count to idim
10 bad arg count to isign
11 bad arg count to mod
12 bad arg count to sign
13 illegal argument to sqrt
14 assigned/computed goto out of range
15 subscript out of range
16 real**real overflow
17 (negative real)**real
100 illegal I/O unit number
101 inconsistent use of I/O unit
102 cannot create output file
103 cannot open input file
104 EOF on input file
105 illegal character in format
106 format does not begin with (
107 no conversion in format but non-empty list
108 excessive parenthesis depth in format
109 illegal format specification
110 illegal character in input field
111 end of format in hollerith specification
112 bad argument to setfil
120 bad argument to ierror
999 unimplemented input conversion
Any of these errors can be caught by the program; see ierror
The following is a list of those features not yet
arithmetic statement functions
scale factors on input