From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 26 Jan 2020 12:37:14 +0000 (+0000)
Subject: syntax: Support &: literal (for make `grouped' multiple targets)
X-Git-Tag: subdirmk/0.4~2
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ian/git?a=commitdiff_plain;h=8a588ad0cc1d3e2944bb29fb3ce19ac2d0dbdcc4;p=subdirmk.git

syntax: Support &: literal (for make `grouped' multiple targets)

Very recent versions of GNU make support this syntax:

  foo bar biz &: baz boz
        echo $^ > foo
        echo $^ > bar
        echo $^ > biz

(See (make)Multiple Targets, subheading `Rules with Grouped Targets')

This use of & is nonoverlapping with everything we care about, so we
can just pass it straight through.  Passing through &: means we pass
through &:: too.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---

diff --git a/README b/README
index 70708cd..bea3c1b 100644
--- a/README
+++ b/README
@@ -130,6 +130,10 @@ So pathname syntax is a subset of:
 &:<directive> <args>....
 	recognised at start of line only (possibly after lwsp)
 
+&:		=>	&:
+	for make multiple targets syntax
+	recognised anywhere *except* start of line
+
 &:include filename		filename should usually be [&]foo.sd.mk
 &:-include filename		tolerate nonexistent file
 	RHS is &-expanded but filenames are relative to the top
diff --git a/generate b/generate
index b682299..b65ba1d 100755
--- a/generate
+++ b/generate
@@ -350,6 +350,7 @@ sub process_input_mk ($$$$) {
 		next;
 	    }
 	    if (s{^\\$esc}{}) { od "$$esclitr" }
+	    elsif (s{^:}{}) { od "$$esclitr:" }
 	    elsif (s{^\\\$}{}) { oud '$' }
 	    elsif (s{^\\\s+$}{}) { }
 	    elsif (s{^$esc}{}) { od "$$esclitr$$esclitr" }