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95 lines
4.0 KiB
Plaintext
95 lines
4.0 KiB
Plaintext
If your compiler does not recognize ANSI C headers,
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compile with KR_headers defined: either add -DKR_headers
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to the definition of CFLAGS in the makefile, or insert
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#define KR_headers
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at the top of f2c.h , cabs.c , main.c , and sig_die.c .
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Under MS-DOS, compile s_paus.c with -DMSDOS.
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If you have a really ancient K&R C compiler that does not understand
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void, add -Dvoid=int to the definition of CFLAGS in the makefile.
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If you use a C++ compiler, first create a local f2c.h by appending
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f2ch.add to the usual f2c.h, e.g., by issuing the command
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make f2c.h
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which assumes f2c.h is installed in /usr/include .
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If your system lacks onexit() and you are not using an ANSI C
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compiler, then you should compile main.c, s_paus.c, s_stop.c, and
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sig_die.c with NO_ONEXIT defined. See the comments about onexit in
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the makefile.
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If your system has a double drem() function such that drem(a,b)
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is the IEEE remainder function (with double a, b), then you may
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wish to compile r_mod.c and d_mod.c with IEEE_drem defined.
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On some systems, you may also need to compile with -Ddrem=remainder .
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To check for transmission errors, issue the command
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make check
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This assumes you have the xsum program whose source, xsum.c,
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is distributed as part of "all from f2c/src". If you do not
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have xsum, you can obtain xsum.c by sending the following E-mail
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message to netlib@research.att.com
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send xsum.c from f2c/src
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The makefile assumes you have installed f2c.h in a standard
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place (and does not cause recompilation when f2c.h is changed);
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f2c.h comes with "all from f2c" (the source for f2c) and is
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available separately ("f2c.h from f2c").
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Most of the routines in libF77 are support routines for Fortran
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intrinsic functions or for operations that f2c chooses not
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to do "in line". There are a few exceptions, summarized below --
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functions and subroutines that appear to your program as ordinary
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external Fortran routines.
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1. CALL ABORT prints a message and causes a core dump.
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2. ERF(r) and DERF(d) and the REAL and DOUBLE PRECISION
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error functions (with x REAL and d DOUBLE PRECISION);
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DERF must be declared DOUBLE PRECISION in your program.
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Both ERF and DERF assume your C library provides the
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underlying erf() function (which not all systems do).
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3. ERFC(r) and DERFC(d) are the complementary error functions:
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ERFC(r) = 1 - ERF(r) and DERFC(d) = 1.d0 - DERFC(d)
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(except that their results may be more accurate than
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explicitly evaluating the above formulae would give).
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Again, ERFC and r are REAL, and DERFC and d are DOUBLE
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PRECISION (and must be declared as such in your program),
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and ERFC and DERFC rely on your system's erfc().
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4. CALL GETARG(n,s), where n is an INTEGER and s is a CHARACTER
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variable, sets s to the n-th command-line argument (or to
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all blanks if there are fewer than n command-line arguments);
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CALL GETARG(0,s) sets s to the name of the program (on systems
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that support this feature). See IARGC below.
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5. CALL GETENV(name, value), where name and value are of type
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CHARACTER, sets value to the environment value, $name, of
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name (or to blanks if $name has not been set).
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6. NARGS = IARGC() sets NARGS to the number of command-line
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arguments (an INTEGER value).
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7. CALL SIGNAL(n,func), where n is an INTEGER and func is an
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EXTERNAL procedure, arranges for func to be invoked when
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signal n occurs (on systems where this makes sense).
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8. CALL SYSTEM(cmd), where cmd is of type CHARACTER, passes
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cmd to the system's command processor (on systems where
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this can be done).
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The makefile does not attempt to compile pow_qq.c, which is meant
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for use with INTEGER*8. To use it, you must modify f2c.h to
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declare longint appropriately; then add pow_qq.o to the POW =
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line in the makefile.
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If you wish to allow the target of a (character string) concatenation
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to be appear on its right-hand (at the cost of extra overhead for
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all run-time concatenations), change "s_cat.o" to "s_catow.o" in
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the makefile. Note that the Fortran 77 Standard explicitly forbids
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the target of a concatenation from appearing on its right-hand side.
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