mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-31 00:25:49 +08:00
113 lines
4.6 KiB
Plaintext
113 lines
4.6 KiB
Plaintext
If your compiler does not recognize ANSI C headers,
|
|
compile with KR_headers defined: either add -DKR_headers
|
|
to the definition of CFLAGS in the makefile, or insert
|
|
|
|
#define KR_headers
|
|
|
|
at the top of f2c.h , cabs.c , main.c , and sig_die.c .
|
|
|
|
Under MS-DOS, compile s_paus.c with -DMSDOS.
|
|
|
|
If you have a really ancient K&R C compiler that does not understand
|
|
void, add -Dvoid=int to the definition of CFLAGS in the makefile.
|
|
|
|
If you use a C++ compiler, first create a local f2c.h by appending
|
|
f2ch.add to the usual f2c.h, e.g., by issuing the command
|
|
make f2c.h
|
|
which assumes f2c.h is installed in /usr/include .
|
|
|
|
If your system lacks onexit() and you are not using an ANSI C
|
|
compiler, then you should compile main.c, s_paus.c, s_stop.c, and
|
|
sig_die.c with NO_ONEXIT defined. See the comments about onexit in
|
|
the makefile.
|
|
|
|
If your system has a double drem() function such that drem(a,b)
|
|
is the IEEE remainder function (with double a, b), then you may
|
|
wish to compile r_mod.c and d_mod.c with IEEE_drem defined.
|
|
On some systems, you may also need to compile with -Ddrem=remainder .
|
|
|
|
To check for transmission errors, issue the command
|
|
make check
|
|
This assumes you have the xsum program whose source, xsum.c,
|
|
is distributed as part of "all from f2c/src". If you do not
|
|
have xsum, you can obtain xsum.c by sending the following E-mail
|
|
message to netlib@netlib.bell-labs.com
|
|
send xsum.c from f2c/src
|
|
|
|
The makefile assumes you have installed f2c.h in a standard
|
|
place (and does not cause recompilation when f2c.h is changed);
|
|
f2c.h comes with "all from f2c" (the source for f2c) and is
|
|
available separately ("f2c.h from f2c").
|
|
|
|
Most of the routines in libF77 are support routines for Fortran
|
|
intrinsic functions or for operations that f2c chooses not
|
|
to do "in line". There are a few exceptions, summarized below --
|
|
functions and subroutines that appear to your program as ordinary
|
|
external Fortran routines.
|
|
|
|
1. CALL ABORT prints a message and causes a core dump.
|
|
|
|
2. ERF(r) and DERF(d) and the REAL and DOUBLE PRECISION
|
|
error functions (with x REAL and d DOUBLE PRECISION);
|
|
DERF must be declared DOUBLE PRECISION in your program.
|
|
Both ERF and DERF assume your C library provides the
|
|
underlying erf() function (which not all systems do).
|
|
|
|
3. ERFC(r) and DERFC(d) are the complementary error functions:
|
|
ERFC(r) = 1 - ERF(r) and DERFC(d) = 1.d0 - DERFC(d)
|
|
(except that their results may be more accurate than
|
|
explicitly evaluating the above formulae would give).
|
|
Again, ERFC and r are REAL, and DERFC and d are DOUBLE
|
|
PRECISION (and must be declared as such in your program),
|
|
and ERFC and DERFC rely on your system's erfc().
|
|
|
|
4. CALL GETARG(n,s), where n is an INTEGER and s is a CHARACTER
|
|
variable, sets s to the n-th command-line argument (or to
|
|
all blanks if there are fewer than n command-line arguments);
|
|
CALL GETARG(0,s) sets s to the name of the program (on systems
|
|
that support this feature). See IARGC below.
|
|
|
|
5. CALL GETENV(name, value), where name and value are of type
|
|
CHARACTER, sets value to the environment value, $name, of
|
|
name (or to blanks if $name has not been set).
|
|
|
|
6. NARGS = IARGC() sets NARGS to the number of command-line
|
|
arguments (an INTEGER value).
|
|
|
|
7. CALL SIGNAL(n,func), where n is an INTEGER and func is an
|
|
EXTERNAL procedure, arranges for func to be invoked when
|
|
signal n occurs (on systems where this makes sense).
|
|
|
|
8. CALL SYSTEM(cmd), where cmd is of type CHARACTER, passes
|
|
cmd to the system's command processor (on systems where
|
|
this can be done).
|
|
|
|
The makefile does not attempt to compile pow_qq.c, qbitbits.c,
|
|
and qbitshft.c, which are meant for use with INTEGER*8. To use
|
|
INTEGER*8, you must modify f2c.h to declare longint and ulongint
|
|
appropriately; then add pow_qq.o to the POW = line in the makefile,
|
|
and add " qbitbits.o qbitshft.o" to the makefile's F90BIT = line.
|
|
|
|
Following Fortran 90, s_cat.c and s_copy.c allow the target of a
|
|
(character string) assignment to be appear on its right-hand, at
|
|
the cost of some extra overhead for all run-time concatenations.
|
|
If you prefer the extra efficiency that comes with the Fortran 77
|
|
requirement that the left-hand side of a character assignment not
|
|
be involved in the right-hand side, compile s_cat.c and s_copy.c
|
|
with -DNO_OVERWRITE .
|
|
|
|
If your system lacks a ranlib command, you don't need it.
|
|
Either comment out the makefile's ranlib invocation, or install
|
|
a harmless "ranlib" command somewhere in your PATH, such as the
|
|
one-line shell script
|
|
|
|
exit 0
|
|
|
|
or (on some systems)
|
|
|
|
exec /usr/bin/ar lts $1 >/dev/null
|
|
|
|
If your compiler complains about the signal calls in main.c, s_paus.c,
|
|
and signal_.c, you may need to adjust signal1.h suitably. See the
|
|
comments in signal1.h.
|