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f1525c23 WH |
1 | . \" Definitions of F, L and LR for the benefit of systems |
2 | . \" whose -man lacks them... | |
3 | .de F | |
4 | .nh | |
5 | .if n \%\&\\$1 | |
6 | .if t \%\&\f(CW\\$1\fR | |
7 | .hy 14 | |
8 | .. | |
9 | .de L | |
10 | .nh | |
11 | .if n \%`\\$1' | |
12 | .if t \%\&\f(CW\\$1\fR | |
13 | .hy 14 | |
14 | .. | |
15 | .de LR | |
16 | .nh | |
17 | .if n \%`\\$1'\\$2 | |
18 | .if t \%\&\f(CW\\$1\fR\\$2 | |
19 | .hy 14 | |
20 | .. | |
21 | .TH F2C 1 | |
22 | .CT 1 prog_other | |
23 | .SH NAME | |
24 | f\^2c \(mi Convert Fortran 77 to C or C++ | |
25 | .SH SYNOPSIS | |
26 | .B f\^2c | |
27 | [ | |
28 | .I option ... | |
29 | ] | |
30 | .I file ... | |
31 | .SH DESCRIPTION | |
32 | .I F2c | |
33 | converts Fortran 77 source code in | |
34 | .I files | |
35 | with names ending in | |
36 | .L .f | |
37 | or | |
38 | .L .F | |
39 | to C (or C++) source files in the | |
40 | current directory, with | |
41 | .L .c | |
42 | substituted | |
43 | for the final | |
44 | .L .f | |
45 | or | |
46 | .LR .F . | |
47 | If no Fortran files are named, | |
48 | .I f\^2c | |
49 | reads Fortran from standard input and | |
50 | writes C on standard output. | |
51 | .I File | |
52 | names that end with | |
53 | .L .p | |
54 | or | |
55 | .L .P | |
56 | are taken to be prototype | |
57 | files, as produced by option | |
58 | .LR -P , | |
59 | and are read first. | |
60 | .PP | |
61 | The following options have the same meaning as in | |
62 | .IR f\^77 (1). | |
63 | .TP | |
64 | .B -C | |
65 | Compile code to check that subscripts are within declared array bounds. | |
66 | .TP | |
67 | .B -I2 | |
68 | Render INTEGER and LOGICAL as short, | |
69 | INTEGER\(**4 as long int. Assume the default \fIlibF77\fR | |
70 | and \fIlibI77\fR: allow only INTEGER\(**4 (and no LOGICAL) | |
71 | variables in INQUIREs. Option | |
72 | .L -I4 | |
73 | confirms the default rendering of INTEGER as long int. | |
74 | .TP | |
75 | .B -onetrip | |
76 | Compile DO loops that are performed at least once if reached. | |
77 | (Fortran 77 DO loops are not performed at all if the upper limit is smaller than the lower limit.) | |
78 | .TP | |
79 | .B -U | |
80 | Honor the case of variable and external names. Fortran keywords must be in | |
81 | .I | |
82 | lower | |
83 | case. | |
84 | .TP | |
85 | .B -u | |
86 | Make the default type of a variable `undefined' rather than using the default Fortran rules. | |
87 | .TP | |
88 | .B -w | |
89 | Suppress all warning messages. | |
90 | If the option is | |
91 | .LR -w66 , | |
92 | only Fortran 66 compatibility warnings are suppressed. | |
93 | .PP | |
94 | The following options are peculiar to | |
95 | .IR f\^2c . | |
96 | .TP | |
97 | .B -A | |
98 | Produce | |
99 | .SM ANSI | |
100 | C. | |
101 | Default is old-style C. | |
102 | .TP | |
103 | .B -a | |
104 | Make local variables automatic rather than static | |
105 | unless they appear in a | |
106 | .SM "DATA, EQUIVALENCE, NAMELIST," | |
107 | or | |
108 | .SM SAVE | |
109 | statement. | |
110 | .TP | |
111 | .B -C++ | |
112 | Output C++ code. | |
113 | .TP | |
114 | .B -c | |
115 | Include original Fortran source as comments. | |
116 | .TP | |
117 | .B -E | |
118 | Declare uninitialized | |
119 | .SM COMMON | |
120 | to be | |
121 | .B Extern | |
122 | (overridably defined in | |
123 | .F f2c.h | |
124 | as | |
125 | .B extern). | |
126 | .TP | |
127 | .B -ec | |
128 | Place uninitialized | |
129 | .SM COMMON | |
130 | blocks in separate files: | |
131 | .B COMMON /ABC/ | |
132 | appears in file | |
133 | .BR abc_com.c . | |
134 | Option | |
135 | .LR -e1c | |
136 | bundles the separate files | |
137 | into the output file, with comments that give an unbundling | |
138 | .IR sed (1) | |
139 | script. | |
140 | .TP | |
141 | .B -ext | |
142 | Complain about | |
143 | .IR f\^77 (1) | |
144 | extensions. | |
145 | .TP | |
146 | .B -f | |
147 | Assume free-format input: accept text after column 72 and do not | |
148 | pad fixed-format lines shorter than 72 characters with blanks. | |
149 | .TP | |
150 | .B -72 | |
151 | Treat text appearing after column 72 as an error. | |
152 | .TP | |
153 | .B -g | |
154 | Include original Fortran line numbers in \f(CW#line\fR lines. | |
155 | .TP | |
156 | .B -h | |
157 | Emulate Fortran 66's treatment of Hollerith: try to align character strings on | |
158 | word (or, if the option is | |
159 | .LR -hd , | |
160 | on double-word) boundaries. | |
161 | .TP | |
162 | .B -i2 | |
163 | Similar to | |
164 | .BR -I2 , | |
165 | but assume a modified | |
166 | .I libF77 | |
167 | and | |
168 | .I libI77 | |
169 | (compiled with | |
170 | .BR -Df\^2c_i2 ), | |
171 | so | |
172 | .SM INTEGER | |
173 | and | |
174 | .SM LOGICAL | |
175 | variables may be assigned by | |
176 | .SM INQUIRE | |
177 | and array lengths are stored in short ints. | |
178 | .TP | |
179 | .B -kr | |
180 | Use temporary values to enforce Fortran expression evaluation | |
181 | where K&R (first edition) parenthesization rules allow rearrangement. | |
182 | If the option is | |
183 | .LR -krd , | |
184 | use double precision temporaries even for single-precision operands. | |
185 | .TP | |
186 | .B -P | |
187 | Write a | |
188 | .IB file .P | |
189 | of ANSI (or C++) prototypes | |
190 | for definitions in each input | |
191 | .IB file .f | |
192 | or | |
193 | .IB file .F . | |
194 | When reading Fortran from standard input, write prototypes | |
195 | at the beginning of standard output. Option | |
196 | .B -Ps | |
197 | implies | |
198 | .B -P | |
199 | and gives exit status 4 if rerunning | |
200 | .I f\^2c | |
201 | may change prototypes or declarations. | |
202 | .TP | |
203 | .B -p | |
204 | Supply preprocessor definitions to make common-block members | |
205 | look like local variables. | |
206 | .TP | |
207 | .B -R | |
208 | Do not promote | |
209 | .SM REAL | |
210 | functions and operations to | |
211 | .SM DOUBLE PRECISION. | |
212 | Option | |
213 | .L -!R | |
214 | confirms the default, which imitates | |
215 | .IR f\^77 . | |
216 | .TP | |
217 | .B -r | |
218 | Cast values of REAL functions (including intrinsics) to REAL. | |
219 | .TP | |
220 | .B -r8 | |
221 | Promote | |
222 | .SM REAL | |
223 | to | |
224 | .SM DOUBLE PRECISION, COMPLEX | |
225 | to | |
226 | .SM DOUBLE COMPLEX. | |
227 | .TP | |
228 | .B -s | |
229 | Preserve multidimensional subscripts. | |
230 | .TP | |
231 | .BI -T dir | |
232 | Put temporary files in directory | |
233 | .I dir. | |
234 | .TP | |
235 | .B -w8 | |
236 | Suppress warnings when | |
237 | .SM COMMON | |
238 | or | |
239 | .SM EQUIVALENCE | |
240 | forces odd-word alignment of doubles. | |
241 | .TP | |
242 | .BI -W n | |
243 | Assume | |
244 | .I n | |
245 | characters/word (default 4) | |
246 | when initializing numeric variables with character data. | |
247 | .TP | |
248 | .B -z | |
249 | Do not implicitly recognize | |
250 | .SM DOUBLE COMPLEX. | |
251 | .TP | |
252 | .B -!bs | |
253 | Do not recognize \fIb\fRack\fIs\fRlash escapes | |
254 | (\e", \e', \e0, \e\e, \eb, \ef, \en, \er, \et, \ev) in character strings. | |
255 | .TP | |
256 | .B -!c | |
257 | Inhibit C output, but produce | |
258 | .B -P | |
259 | output. | |
260 | .TP | |
261 | .B -!I | |
262 | Reject | |
263 | .B include | |
264 | statements. | |
265 | .TP | |
266 | .B -!i8 | |
267 | Disallow | |
268 | .SM INTEGER*8. | |
269 | .TP | |
270 | .B -!it | |
271 | Don't infer types of untyped | |
272 | .SM EXTERNAL | |
273 | procedures from use as parameters to previously defined or prototyped | |
274 | procedures. | |
275 | .TP | |
276 | .B -!P | |
277 | Do not attempt to infer | |
278 | .SM ANSI | |
279 | or C++ | |
280 | prototypes from usage. | |
281 | .PP | |
282 | The resulting C invokes the support routines of | |
283 | .IR f\^77 ; | |
284 | object code should be loaded by | |
285 | .I f\^77 | |
286 | or with | |
287 | .IR ld (1) | |
288 | or | |
289 | .IR cc (1) | |
290 | options | |
291 | .BR "-lF77 -lI77 -lm" . | |
292 | Calling conventions | |
293 | are those of | |
294 | .IR f\&77 : | |
295 | see the reference below. | |
296 | .br | |
297 | .SH FILES | |
298 | .TP | |
299 | .IB file .[fF] | |
300 | input file | |
301 | .TP | |
302 | .B *.c | |
303 | output file | |
304 | .TP | |
305 | .F /usr/include/f2c.h | |
306 | header file | |
307 | .TP | |
308 | .F /usr/lib/libF77.a | |
309 | intrinsic function library | |
310 | .TP | |
311 | .F /usr/lib/libI77.a | |
312 | Fortran I/O library | |
313 | .TP | |
314 | .F /lib/libc.a | |
315 | C library, see section 3 | |
316 | .SH "SEE ALSO" | |
317 | S. I. Feldman and | |
318 | P. J. Weinberger, | |
319 | `A Portable Fortran 77 Compiler', | |
320 | \fIUNIX Time Sharing System Programmer's Manual\fR, | |
321 | Tenth Edition, Volume 2, AT&T Bell Laboratories, 1990. | |
322 | .SH DIAGNOSTICS | |
323 | The diagnostics produced by | |
324 | .I f\^2c | |
325 | are intended to be | |
326 | self-explanatory. | |
327 | .SH BUGS | |
328 | Floating-point constant expressions are simplified in | |
329 | the floating-point arithmetic of the machine running | |
330 | .IR f\^2c , | |
331 | so they are typically accurate to at most 16 or 17 decimal places. | |
332 | .br | |
333 | Untypable | |
334 | .SM EXTERNAL | |
335 | functions are declared | |
336 | .BR int . |