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-Type "make" to check the validity of the f2c source and compile f2c.
-
-On a PC, you may need to compile xsum.c with -DMSDOS (i.e., with
-MSDOS #defined).
-
-If your compiler does not understand ANSI/ISO C syntax (i.e., if
-you have a K&R C compiler), compile with -DKR_headers .
-
-On non-Unix systems where files have separate binary and text modes,
-you may need to "make xsumr.out" rather than "make xsum.out".
-
-If (in accordance with what follows) you need to modify the makefile
-or any of the source files, first issue a "make xsum.out" (or, if
-appropriate, "make xsumr.out") to check the validity of the f2c source,
-then make your changes, then type "make f2c".
-
-The file usignal.h is for the benefit of strictly ANSI include files
-on a UNIX system -- the ANSI signal.h does not define SIGHUP or SIGQUIT.
-You may need to modify usignal.h if you are not running f2c on a UNIX
-system.
-
-Should you get the message "xsum0.out xsum1.out differ", see what lines
-are different (`diff xsum0.out xsum1.out`) and ask netlib
-(e.g., netlib@research.att.com) to send you the files in question,
-plus the current xsum0.out (which may have changed) "from f2c/src".
-For example, if exec.c and expr.c have incorrect check sums, you would
-send netlib the message
-	send exec.c expr.c xsum0.out from f2c/src
-You can also ftp these files from netlib.att.com; for more details, ask
-netlib@research.att.com to "send readme from f2c".
-
-On some systems, the malloc and free in malloc.c let f2c run faster
-than do the standard malloc and free.  Other systems may not tolerate
-redefinition of malloc and free (though changes of 8 Nov. 1994 may
-render this less of a problem than hitherto).  If yours is such a
-system, you may either modify the makefile appropriately (remove
-"malloc.o" from the "OBJECTS =" assignment), or simply execute
-	cc -c -DCRAY malloc.c
-before typing "make".  Still other systems have a -lmalloc that
-provides performance competitive with that from malloc.c; you may
-wish to compare the two on your system.
-
-On some BSD systems, you may need to create a file named "string.h"
-whose single line is
-#include <strings.h>
-you may need to add " -Dstrchr=index" to the "CFLAGS =" assignment
-in the makefile, and you may need to add " memset.o" to the "OBJECTS ="
-assignment in the makefile -- see the comments in memset.c .
-
-For non-UNIX systems, you may need to change some things in sysdep.c,
-such as the choice of intermediate file names.
-
-On some systems, you may need to modify parts of sysdep.h (which is
-included by defs.h).  In particular, for Sun 4.1 systems and perhaps
-some others, you need to comment out the typedef of size_t.  For some
-systems (e.g., IRIX 4.0.1 and AIX) it is better to add
-#define ANSI_Libraries
-to the beginning of sysdep.h (or to supply -DANSI_Libraries in the
-makefile).
-
-Alas, some systems #define __STDC__ but do not provide a true standard
-(ANSI or ISO) C environment, e.g. do not provide stdlib.h .  If yours
-is such a system, then (a) you should complain loudly to your vendor
-about __STDC__ being erroneously defined, and (b) you should insert
-#undef __STDC__
-at the beginning of sysdep.h .  You may need to make other adjustments.
-
-For some non-ANSI versions of stdio, you must change the values given
-to binread and binwrite in sysdep.c from "rb" and "wb" to "r" and "w".
-You may need to make this change if you run f2c and get an error
-message of the form
-	Compiler error ... cannot open intermediate file ...
-
-On many systems, it is best to combine libF77 and libI77 into a single
-library, say libf2c, as suggested in "readme from f2c".  If you do not
-do this, then you should adjust the definition of link_msg in sysdep.c
-appropriately (e.g., replacing "-lf2c" by "-lF77 -lI77").  On Unix
-systems, the easiest way to create libf2c.a is to make libF77/libF77.a
-and libI77/libI77.a (after reading and heeding libF77/README and
-libI77/README), and then to say
-
-	cp libF77/libF77.a libf2c.a
-	ar ruv libf2c.a libI77/*.o
-	ranlib libf2c.a
-
-The last step, ranlib, may not be necessary on your system.  On
-other systems, just compile all the .c files in libF77 and libI77,
-and put the resulting objects (except one or both of the Version
-objects) into a library, called perhaps f2c.lib .
-
-Some older C compilers object to
-	typedef void (*foo)();
-or to
-	typedef void zap;
-	zap (*foo)();
-If yours is such a compiler, change the definition of VOID in
-f2c.h from void to int.
-
-For convenience with systems that use control-Z to denote end-of-file,
-f2c treats control-Z characters (ASCII 26, '\x1a') that appear at the
-beginning of a line as an end-of-file indicator.  You can disable this
-test by compiling lex.c with NO_EOF_CHAR_CHECK #defined, or can
-change control-Z to some other character by #defining EOF_CHAR to
-be the desired value.
-
-
-If your machine has IEEE, VAX, or IBM-mainframe arithmetic, but your
-printf is inaccurate (e.g., with Symantec C++ version 6.0,
-printf("%.17g",12.) prints 12.000000000000001), you can make f2c print
-correctly rounded numbers by compiling with -DUSE_DTOA and adding
-dtoa.o g_fmt.o to the makefile's OBJECTS = line, so it becomes
-
-	OBJECTS = $(OBJECTSd) malloc.o dtoa.o g_fmt.o
-
-Also add the rule
-
-	dtoa.o: dtoa.c
-		$(CC) -c $(CFLAGS) -DMALLOC=ckalloc -DIEEE... dtoa.c
-
-(without the initial tab) to the makefile, where IEEE... is one of
-IEEE_MC68k, IEEE_8087, VAX, or IBM, depending on your machine's
-arithmetic.  See the comments near the start of dtoa.c.
-
-The relevant source files, dtoa.c and g_fmt.c, are available
-separately from netlib's fp directory.  For example, you could
-send the E-mail message
-
-	send dtoa.c g_fmt.c from fp
-
-to netlib@research.att.com (or use anonymous ftp from netlib.att.com
-and look in directory /netlib/fp).
-
-The makefile has a rule for creating tokdefs.h.  If you cannot use the
-makefile, an alternative is to extract tokdefs.h from the beginning of
-gram.c: it's the first 100 lines.
-
-
-Please send bug reports to dmg@research.att.com .  The old index file
-(now called "readme" due to unfortunate changes in netlib conventions:
-"send readme from f2c") will report recent changes in the recent-change
-log at its end; all changes will be shown in the "changes" file
-("send changes from f2c").  To keep current source, you will need to
-request xsum0.out and version.c, in addition to the changed source
-files.  Changes first appear on netlib@research.att.com, and in due
-time propagate to the other netlib sites that are kept current.