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-Check the CC and CFLAGS lines in the makefile
-
-If your C library does not support the times(3) function, change the
-#define TIMES to
-#undef TIMES in speed.c
-If it does, check the HZ value for the times(3) function.
-If your system does not define CLK_TCK it will be assumed to
-be 60.
-
-If possible use gcc v 2.2.2
-Turn on the maximum optimising
-
-type 'make'
-
-run './destest' to check things are ok.
-run './rpw' to check the tty code for reading passwords works.
-run './speed' to see how fast those optimisations make the library run :-)
-
-A make install will by default install
-libdes.a in /usr/local/lib/libdes.a
-des in /usr/local/bin/des
-des_crypt.man in /usr/local/man/man3/des_crypt.3
-des.man in /usr/local/man/man1/des.1
-des.h in /usr/include/des.h
-
-des(1) should be compatible with sunOS's but I have been unable to
-test it.
-
-These routines should compile on MSDOS, most 32bit and 64bit version
-of Unix (BSD and SYSV) and VMS, without modification.
-The only problems should be #include files that are in the wrong places.
-
-These routines can be compiled under MSDOS.
-I have successfully encrypted files using des(1) under MSDOS and then
-decrypted the files on a SparcStation.
-I have been able to compile and test the routines with
-Microsoft C v 5.1 and Turbo C v 2.0.
-The code in this library is in no way optimised for the 16bit
-operation of MSDOS. Microsoft C generates code that is 40% slower
-than Turbo C's code. I believe this is due to problems it has with
-code generation with the 32bit shift operation in the IP and FP
-sections. I have added some 16bit optimization in ecb_encrypt.c
-and this generated a %70 speedup under Turbo C. Such are the
-limitations of DOS compilers :-(.
-
-For Turbo C v 2.0, make sure to define MSDOS, in the relevant menu.
-
-There is an alternative version of the D_ENCRYPT macro that can be
-enabled with the -DALT_ECB option in the makefile. This alternative
-macro can make a +-%20 speed difference to the DES encryption speed,
-depending on the compiler/CPU combinations.
-It has its greatest effect on Sparc machines when using the sun compiler.
-If in doubt, try enable/disable it and running speed.