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make(1): document variable expansion in the .END node

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This commit is contained in:
rillig 2020-12-13 18:57:44 +00:00
parent 53f65f3d12
commit 73287a0b22
1 changed files with 13 additions and 2 deletions
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15
usr.bin/make/compat.c
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@ -1,4 +1,4 @@
/* $NetBSD: compat.c,v 1.213 2020/12/13 18:12:29 christos Exp $ */
/* $NetBSD: compat.c,v 1.214 2020/12/13 18:57:44 rillig Exp $ */
/*
* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
@ -96,7 +96,7 @@
#include "pathnames.h"
/* "@(#)compat.c 8.2 (Berkeley) 3/19/94" */
MAKE_RCSID("$NetBSD: compat.c,v 1.213 2020/12/13 18:12:29 christos Exp $");
MAKE_RCSID("$NetBSD: compat.c,v 1.214 2020/12/13 18:57:44 rillig Exp $");
static GNode *curTarg = NULL;
static pid_t compatChild;
@ -258,6 +258,17 @@ Compat_RunCommand(const char *cmdp, GNode *gn)
if (gn->type & OP_SAVE_CMDS) {
GNode *endNode = Targ_GetEndNode();
if (gn != endNode) {
/*
* Append the expanded command, to prevent the
* local variables from being interpreted in the
* context of the .END node.
*
* A probably unintended side effect of this is that
* the expanded command will be expanded again in the
* .END node. Therefore, a literal '$' in these
* commands must be written as '$$$$' instead of the
* usual '$$'.
*/
Lst_Append(&endNode->commands, cmdStart);
return 0;
}