Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

make(1): demonstrate another unintended variable evaluation

This commit is contained in:
rillig 2020-07-02 12:37:18 +00:00
parent b8b3ace20a
commit 4f4f969a98
2 changed files with 8 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
usr.bin/make/unit-tests/cond-short.exp
View File

@ -3,6 +3,7 @@ expected and exists
expected and empty
expected U23 condition
expected VAR23
unexpected M pattern
expected or
expected or exists
expected or empty

10
usr.bin/make/unit-tests/cond-short.mk
View File

@ -1,4 +1,4 @@
# $NetBSD: cond-short.mk,v 1.3 2020/07/02 10:36:58 rillig Exp $
# $NetBSD: cond-short.mk,v 1.4 2020/07/02 12:37:18 rillig Exp $
#
# Demonstrates that in conditions, the right-hand side of an && or ||
# is only evaluated if it can actually influence the result.
@ -27,8 +27,8 @@
.if 1 && empty(${echo "expected and empty" 1>&2 :L:sh})
.endif
# FIXME: "VAR U11" must not be evaluated.
# The whole !empty condition must only be parsed and then discarded.
# "VAR U11" is not evaluated; it was evaluated before 2020-07-02.
# The whole !empty condition is only parsed and then discarded.
VAR= ${VAR${:U11${echo "unexpected VAR U11" 1>&2 :L:sh}}}
VAR13= ${VAR${:U12${echo "unexpected VAR13" 1>&2 :L:sh}}}
.if 0 && !empty(VAR${:U13${echo "unexpected U13 condition" 1>&2 :L:sh}})
@ -39,6 +39,10 @@ VAR23= ${VAR${:U22${echo "expected VAR23" 1>&2 :L:sh}}}
.if 1 && !empty(VAR${:U23${echo "expected U23 condition" 1>&2 :L:sh}})
.endif
# FIXME: The :M modifier must only be parsed, not evaluated.
.if 0 && !empty(VAR:M${:U${echo "unexpected M pattern" 1>&2 :L:sh}})
.endif
# The || operator.
.if 1 || ${echo "unexpected or" 1>&2 :L:sh}