CVS commit: src/usr.bin/make/unit-tests

["Roland Illig" <rillig%netbsd.org@localhost>]

Module Name:    src
Committed By:   rillig
Date:           Mon Aug  8 19:53:28 UTC 2022

Modified Files:
        src/usr.bin/make/unit-tests: parse-var.mk

Log Message:
tests/make: document history of bug in parsing unbalanced expressions

The bug was introduced in var.c 1.323, which merged two flags that
sounded as if they had been exact opposites: VAR_NOSUBST (later named
VARE_NOSUBST) and VARE_WANTRES.

Before that commit, the branch where make only counted braces instead of
properly parsing the nested expression was only taken in the modifiers
':@var@body@' and '::=', but not in ':S' and ':C'.

After merging the two flags, the modifier parts of ':S' and ':C' had to
be balanced as well, otherwise parsing would fail in cases where the
expression was only parsed, not evaluated.


To generate a diff of this commit:
cvs rdiff -u -r1.3 -r1.4 src/usr.bin/make/unit-tests/parse-var.mk

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.