Date: Thu, 30 May 2002 19:42:28 -0700 From: Jos Backus <jos@catnook.com> To: freebsd-hackers@freebsd.org Subject: Improving GNU make compatibility in BSD make (+ patch) Message-ID: <20020531024250.GA90997@lizzy.catnook.com>
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The GNU make info file says:
`$^'
The names of all the prerequisites, with spaces between them. For
prerequisites which are archive members, only the member named is
used (*note Archives::). A target has only one prerequisite on
each other file it depends on, no matter how many times each file
is listed as a prerequisite. So if you list a prerequisite more
than once for a target, the value of `$^' contains just one copy
of the name.
`$+'
This is like `$^', but prerequisites listed more than once are
duplicated in the order they were listed in the makefile. This is
primarily useful for use in linking commands where it is
meaningful to repeat library file names in a particular order.
The make(1) manpage says:
.ALLSRC The list of all sources for this target; also known as
`>'.
So BSD make interpreting either `$^' or `$+' as its own `$>' would improve
compatibility with GNU make Makefiles. I am just not sure which of the two GNU
make variables maps better to our `$>'. This patch implements the former:
--- var.c Sat Apr 13 03:16:56 2002
+++ var.c.new Thu May 30 19:32:01 2002
@@ -1489,6 +1489,8 @@
name[0] = str[1];
name[1] = '\0';
+ if (name[0] == '^')
+ name[0] = '>';
v = VarFind (name, ctxt, FIND_ENV | FIND_GLOBAL | FIND_CMD);
if (v == (Var *)NULL) {
--
Jos Backus _/ _/_/_/ Santa Clara, CA
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jos@catnook.com _/_/ _/_/_/ use Std::Disclaimer;
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