HOW TO INSTALL ZIP     Zip is distributed as C source code that can be compiled on a     wide range of Unix machines, VAXes running VMS, and MSDOS     machines using Microsoft or Borland C++, and OS/2 machines using     Microsoft C.  You will need Unzip 5.0p1 (under Unix, MSDOS, or VMS)     or PKUNZIP 2.04g or later (under MSDOS) to unpack the distribution     file, zip20.zip. But since you read this, you have unpacked it     already, or you cheated and got a tar.Z file...     Let's assume however that you start from scratch and have not yet     unpacked the sources. First, unpack the source as follows,     assuming that you have zip20.zip in the current directory.          mkdir zipsrc          cd zipsrc          unzip ../zip20     This extracts all source files and documentation in the     directory called "zipsrc". If you wish to build a version     of zip with encryption capabilities, you must also get the     separate package zcrypt20.zip and uncomment the definition     of MAKE at the beginning of the makefile.     You then do:          make system     where "system" is one of: generic, 386bsd, 3b1, aix, att6300, aux, bsd,     bsdold, bull, convex, coherent, cray, cray_v3, dec_osf1, dnix,     dynix, hpux, isc, linux, minix, next10, next2x, next3x, nextfat, pixel,     ptx, rs6000, scodos, sgi, sun, sun_gcc, sysv, sysv_gcc, sysv_386,     sys_386_gcc, sysv_old, ultrix, v7, xenix, xos, zilog.     Try "make generic" first, this works on most systems. If this     fails, then use one of the special targets given above.     If you are using a NeXT, then make next for help about various     NeXT targets.  Among other special systems are HPUX, DNIX 5.2 or     5.3, Cray Unicos, AT&T 3B1 (also known as Unix PC or PC 7300),     Zilog Zeus, A/UX, Convex, AIX, MINIX, ISC System V/386, Dynix,     Ultrix and DEC OSF/1.     If you are using BSD Unix, try bsd.  If the linker cannot find     _memset or _memcpy, try bsdold or v7.  If you are using System V     Unix or SCO Unix, try sysv or sysv_old.  Also use sysv on a     Silicon Graphics (SGI) machine.  You can also cross-compile Zip     for MSDOS under SCO 386 Unix using "make scodos". If you get     error messages "constant expected" in deflate.c, add -DDYN_ALLOC     to CFLAGS in your makefile entry.     If you have lots of memory, try compiling with -DBIG_MEM. If your     system supports mmap(), try compiling with -DMMAP. This generally     gives faster compression but uses more memory. See the Makefile     entry mmap_gcc for an example.     If none of these compiles, links, and functions properly on     your Unix system, see the file README for how to get help.     If the appropriate system was selected, then the executables     zip, zipnote and zipsplit will be created.  You can copy them     to an appropriate directory in the search path using:          make install     The defaults are /usr/local/bin for the executables and     /usr/man/man1 for the manual page. Change the macros BINDIR     and MANDIR in makefile if appropriate.     You can use the command "set" to see the current search     path.  If you are using the C-Shell (csh), enter the com-     mand:          rehash     so csh can find the new command in the path.  You are now     ready to use Zip.     You can get rid of the now unnecessary source and object     files with:          cd ..          rm -r zipsrc     This will remove the directory zip and its contents created     by unzip.  You should keep the zip20.zip file around though,     in case you need to build it again or want to give it to a     colleague.     You can add the following lines to the file /etc/magic for     usage by the 'file' command:0	string		PK\003\004	Zip archive>4	string		\011		(at least v0.9 to extract)>4	string		\012		(at least v1.0 to extract)>4	string		\013		(at least v1.1 to extract)>4	string		\024		(at least v2.0 to extract)     The steps for installation under MSDOS, OS/2, and VMS are     similar to the above: first unzip the distribution files     into their own directory. The system dependant files are     stored in special subdirectories. You may have to     copy or move them to the main sources directory.     Then under MSDOS do one of:          make makefile.msc          make -fmakefile.bor     for Microsoft or Borland C++, respectively. For Turbo C 2.0,     use the configuration file tcconfig.tc, the batch file     doturboc.bat and the project files zip.prj, zipnote.prj     and zipsplit.prj. Make sure to use the compact model.     Under OS/2:          nmake -f makefile.os2     for Microsoft C 6.00.  Under VAX VMS:          @make_vaxc     or:  @make_gcc     For command help on any of the zip* utilities, simply enter     the name with no arguments.