christos
Tue Dec 24 12:36:29 EST 1996
Update of /cvsroot/src/usr.bin/make
In directory netbsd1:/var/slash-tmp/cvs-serv28824

Modified Files:
	make.1 var.c 
Log Message:
[initial version of the substitution/regexp changes were courtesy of Der Mouse]

- fix the variable substitution code in make [PR/2748]
      1. change s/a/b/ so that it substitutes the first occurance of the
	 pattern on each word, not only the first word.
      2. add flag '1' to the variable substitution so that the substitutions
	 get performed only once.

  ***THIS IS AN INCOMPATIBLE CHANGE!***

  Unfortunately there was no way to make things consistent without
  modifying the current behavior. Fortunately none of our Makefiles
  depended on this.

	    OLD:

		VAR      = aa1 aa2 aa3 aa4

		S/a/b/   = ba1 aa2 aa3 aa4
		S/a/b/g  = bb1 bb2 bb3 bb4

	    NEW:

		VAR      = aa1 aa2 aa3 aa4

		S/a/b/   = ba1 ba2 ba3 ba4
		S/a/b/1  = ba1 aa2 aa3 aa4
		S/a/b/g  = bb1 bb2 bb3 bb4
		S/a/b/1g = bb1 aa2 aa3 aa4

- add regexp variable substitution via 'C/foo/bar/' [PR/2752]

- add variable quoting via the ${VAR:Q} modifier. This is useful when running
  recursive invocations of make(1):

	make VAR=${VAR:Q}

  will always work... (This may prove useful in the kernel builds...) [PR/2981]