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Diff for /src/share/mk/bsd.README between version 1.22 and 1.23

version 1.22, 2000/05/15 06:10:21 version 1.23, 2001/04/03 23:00:08
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 the command "make b" will echo "bar".  This is for compatibility with the  the command "make b" will echo "bar".  This is for compatibility with the
 way the V7 make behaved.  way the V7 make behaved.
   
   To make things even more confusing, make uses lazy evaluation. All
   variables are expanded only when needed. Which means that, in
   
           a=      foo
   
           b: $(a)
                   echo $(.ALLSRC)
                   echo $(a)
   
           foo:
                   touch foo
   
           a=      bar
   
   the command "make b" will echo "foo"; echo "bar".  The first $(a) means
   "foo", because it's needed to generate the dependency rule when it's read,
   but the second $(a) is only expanded when needed, at which point a contains
   bar.
   
 It's fairly difficult to make the BSD .mk files work when you're building  It's fairly difficult to make the BSD .mk files work when you're building
 multiple programs in a single directory.  It's a lot easier to split up the  multiple programs in a single directory.  It's a lot easier to split up the
 programs than to deal with the problem.  Most of the agony comes from making  programs than to deal with the problem.  Most of the agony comes from making
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 NONBINMODE      Mode for non-executable files. [444]  NONBINMODE      Mode for non-executable files. [444]
   
   DIRMODE         Mode for new directories. [755]
   
 MANDIR          Base path for manual installation. [/usr/share/man/cat]  MANDIR          Base path for manual installation. [/usr/share/man/cat]
   
 MANGRP          Manual group. [bin]  MANGRP          Manual group. [bin]
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 process (default values are in brackets along with comments, if set by  process (default values are in brackets along with comments, if set by
 bsd.own.mk):  bsd.own.mk):
   
   AFS             Compile support for AFS.
   
 SKEY            Compile in support for S/key authentication. [yes, set  SKEY            Compile in support for S/key authentication. [yes, set
                 unconditionally]                  unconditionally]
   
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 MANZ            Compress manual pages at installation time.  MANZ            Compress manual pages at installation time.
   
   MANPS           Define to have PostScript manual pages generated.
   
 SYS_INCLUDE     Copy or symlink kernel include files into /usr/include.  SYS_INCLUDE     Copy or symlink kernel include files into /usr/include.
                 Possible values are "symlinks" or "copies" (which is                  Possible values are "symlinks" or "copies" (which is
                 the same as the variable being unset).                  the same as the variable being unset).
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 GLOBAL_AUTOCONF_CACHE  GLOBAL_AUTOCONF_CACHE
                 Set to the name of a file that all cached GNU autoconf                  Set to the name of a file that all cached GNU autoconf
                 test results will be saved in.  Reduces redundant tests.                  test results will be saved in.  Reduces redundant tests.
                   Be careful!  Redundant tests may not be redundant if you
                   are installing substantially updated gnu programs.
   
   UVM
                   Set to yes on machines that switched to the new unified
                   vm. Temporary, until everything supports uvm.
   
 bsd.own.mk is generally useful when building your own Makefiles so that  bsd.own.mk is generally useful when building your own Makefiles so that
 they use the same default owners etc. as the rest of the tree.  they use the same default owners etc. as the rest of the tree.
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