1F77(1) General Commands Manual F77(1)
2
6 f77 - Fortran77 compiler
7
9 f77 [ option ] ... file ...
10
12 F77 is the UNIX Fortran77 compiler. It accepts several types of argu‐
13 ments:
14 Arguments whose names end with `.f' are taken to be Fortran77 source
16 programs; they are compiled, and each object program is left on the
17 file in the current directory whose name is that of the source with
18 `.o' substituted for '.f'.
19 Arguments whose names end with `.r' or `.e' are taken to be Ratfor or
21 EFL source programs, respectively; these are first transformed by the
22 appropriate preprocessor, then compiled by f77.
23 In the same way, arguments whose names end with `.c' or `.s' are taken
25 to be C or assembly source programs and are compiled or assembled, pro‐
26 ducing a `.o' file.
27 The following options have the same meaning as in cc(1). See ld(1) for
29 load-time options.
30 -c Suppress loading and produce `.o' files for each source file.
32 -p Prepare object files for profiling, see prof(1)
34 -O Invoke an object-code optimizer.
36 -S Compile the named programs, and leave the assembler-language
38 output on corresponding files suffixed `.s'. (No `.o' is cre‐
39 ated.).
40 -f Use a floating point interpreter (for PDP11's that lack
42 11/70-style floating point).
43 -o output
45 Name the final output file output instead of `a.out'.
46 The following options are peculiar to f77:
48 -onetrip
50 Compile DO loops that are performed at least once if reached.
51 (Fortran77 DO loops are not performed at all if the upper limit
52 is smaller than the lower limit.)
53 -u Make the default type of a variable `undefined' rather than
55 using the default Fortran rules.
56 -C Compile code to check that subscripts are within declared array
58 bounds.
59 -w Suppress all warning messages. If the option is `-w66', only
61 Fortran 66 compatibility warnings are suppressed.
62 -F Apply EFL and Ratfor preprocessor to relevant files, put the
64 result in the file with the suffix changed to `.f', but do not
65 compile.
66 -m Apply the M4 preprocessor to each `.r' or `.e' file before
68 transforming it with the Ratfor or EFL preprocessor.
69 -Ex Use the string x as an EFL option in processing `.e'
72 files.
73 -Rx Use the string x as a Ratfor option in processing `.r'
75 files.
76 -U Do not convert upper case letters to lower case.
78 -I2 Make default integer size 16 bit.
80 -I4 Make default integer size 32 bit (default).
82 -v Verbose. Print information showing what compiler is
84 doing.
85 -d Debug prints out intermediate information, leaves tempo‐
87 rary files in /tmp and often produces a core file.
88 Other arguments are taken to be either loader option arguments,
90 or F77-compatible object programs, typically produced by an ear‐
91 lier run, or perhaps libraries of F77-compatible routines.
92 These programs, together with the results of any compilations
93 specified, are loaded (in the order given) to produce an exe‐
94 cutable program with name `a.out'.
95
97 file.[fresc] input file
98 file.o object file
99 a.out loaded output
100 /usr/libexec/f77pass1compiler pass 1
101 /lib/c1 compiler pass 2
102 /lib/c2 optional optimizer
103 /usr/lib/libF77.a intrinsic function library
104 /usr/lib/libI77.a Fortran I/O library
105 /usr/lib/libU77.a Fortran system call library
106 /lib/libc.a C library, see section 3
107 /temp/fortPID.[xsad SopzA]temporary files
108 Different versions of the compiler tools may be used with the
110 following flags followed immediately (no space) by the path name
111 of the desired module:
112 -T1 pass1 /lib/f77pass1
114 -T2 pass2 /lib/c1
115 -Ta assembler /bin/as
116 -Tl loader /bin/ld
117 -TF footname /lib/crt0.o
118 -TM macro pack m4
119
121 S. I. Feldman, P. J. Weinberger, A Portable Fortran77 Compiler
122 cc(1), ld(1), prof(1)
123
125 The diagnostics produced by f77 itself are intended to be self-
126 explanatory. Occasional messages may be produced by the loader.
127 -d causes the intermediate files to be saves in /tmp and
129 causes the compiler to print out what it is doing.
130 Run-time diagnostics for the input/output library are as fol‐
132 lows:
133 /* 100 */ "error in format"
135 See error message output for the location
136 of the error in the format. Can be caused
137 by more than 10 levels of nested (), or
138 an extremely long format statement.
139 /* 101 */ "illegal unit number"
140 It is illegal to close logical unit 0.
141 Negative unit numbers are not allowed.
142 The upper limit is system dependent.
143 /* 102 */ "formatted io not allowed"
145 The logical unit was opened for
146 unformatted I/O.
147 /* 103 */ "unformatted io not allowed"
149 The logical unit was opened for
150 formatted I/O.
151 /* 104 */ "direct io not allowed"
153 The logical unit was opened for sequential
154 access, or the logical record length was
155 specified as 0.
156 /* 105 */ "sequential io not allowed"
158 The logical unit was opened for direct
159 access I/O.
160 /* 106 */ "can't backspace file"
162 The file associated with the logical unit
163 can't seek. May be a device or a pipe.
164 /* 107 */ "off beginning of record"
166 The format specified a left tab off the
167 beginning of the record.
168 /* 108 */ "can't stat file"
170 The system can't return status information
171 about the file. Perhaps the directory is
172 unreadable.
173 /* 109 */ "no * after repeat count"
175 Repeat counts in list-directed I/O must be
176 followed by an * with no blank spaces.
177 /* 110 */ "off end of record"
179 A formatted write tried to go beyond the
180 logical end-of-record. An unformatted read
181 or write will also cause this.
182 /* 111 */ "truncation failed"
184 The truncation of external sequential files
185 on 'close', 'backspace', or 'rewind' tries
186 to do a copy. It failed. Perhaps the temp
187 file couldn't be created.
188 /* 112 */ "incomprehensible list input"
190 List input has to be just right.
191 /* 113 */ "out of free space"
193 The library dynamically creates buffers for
194 internal use. You ran out of memory for this.
195 Your program is too big!
196 /* 114 */ "unit not connected"
198 The logical unit was not open.
199 /* 115 */ "read unexpected character"
201 Certain format conversions can't tolerate
202 non-numeric data. Logical data must be
203 T or F.
204 /* 116 */ "blank logical input field"
206 /* 117 */ "'new' file exists"
208 You tried to open an existing file with
209 "status='new'".
210 /* 118 */ "can't find 'old' file"
212 You tried to open a nonexistent file
213 with "status='old'".
214 /* 119 */ "unknown system error"
216 Shouldn't happen, but .....
217 (Send me a documented example.)
218 /* 120 */ "requires seek ability"
220 Direct access requires seek ability.
221 Sequential unformatted I/O requires seek
222 ability on the file due to the special
223 data structure required. Tabbing left
224 also requires seek ability.
225 /* 121 */ "illegal argument"
227 Certain arguments to 'open', etc. will be
228 checked for legitimacy. Often only non-
229 default forms are looked for.
230 /* 122 */ "negative repeat count"
232 /* 123 */ "illegal operation for channel or device"
234
236 The Fortran66 subset of the language has been exercised exten‐
237 sively; the newer features have not.
238 Fortran style read/write routines take up 23 Kbytes of address‐
240 ing space.
241 The compiler is not intelligent enough to know when to split up
243 assemblies and loads. Occasionally this causes the loader ld(1)
244 to produce the informative local symbol botch error message when
245 local symbols like argument names are defined with different
246 types. Thus one must split up such offensive modules into sepa‐
247 rate compilations.
248 All mathematics for reals is done in double precision.
250 Integer*4 byte alignment is unlike DEC and everyone else's.
251 There is no symbolic debugger.
252 The optimizer should be used with caution. It is known to occa‐
254 sionally produce incorrect code.
255
257 f77 -O -c myprog.f
258 creates myprog.o using C optimizer
259 f77 -i -O myprog.f another.f anon.o -lplot
261 compiles .f files, loads all files using separate i&d
262 space and linking in routines in the plot library.
263 f77 myprog.f mine.c >&errors
265 Compiles and loads both files putting error output into
266 file called errors. This is the C shell (csh) version.
267 The Bourne shell (sh) version is:
268 f77 myprog.f mine.c 2>errors 1>errors
2703rd Berkeley Distribution F77(1)