mirror of
https://github.com/freebsd/freebsd-src
synced 2024-07-22 10:48:02 +00:00
cdde9e894d
Features of interest: Allow setting target local variables (similar to gmake) In META_MODE .MAKE.META.CMP_FILTER can be used for filtering commands before comparion. contrib/bmake/mk/cc-wrap.mk is an example of using these See ChangeLog for the gory details.
61 lines
1.9 KiB
Makefile
61 lines
1.9 KiB
Makefile
# $NetBSD: cond-op-parentheses.mk,v 1.5 2022/01/22 21:50:41 rillig Exp $
|
|
#
|
|
# Tests for parentheses in .if conditions, which group expressions to override
|
|
# the precedence of the operators '!', '&&' and '||'. Parentheses cannot be
|
|
# used to form arithmetic expressions such as '(3+4)' though.
|
|
|
|
# Contrary to the C family of programming languages, the outermost condition
|
|
# does not have to be enclosed in parentheses.
|
|
.if defined(VAR)
|
|
. error
|
|
.elif !1
|
|
. error
|
|
.endif
|
|
|
|
# Parentheses cannot enclose numbers as there is no need for it. Make does
|
|
# not implement any arithmetic functions in its condition parser. If
|
|
# absolutely necessary, use expr(1).
|
|
# expect+1: String comparison operator must be either == or !=
|
|
.if 3 > (2)
|
|
.endif
|
|
# expect+1: Malformed conditional ((3) > 2)
|
|
.if (3) > 2
|
|
.endif
|
|
|
|
# Test for deeply nested conditions.
|
|
.if (((((((((((((((((((((((((((((((((((((((((((((((((((((((( \
|
|
(((((((((((((((((((((((((((((((((((((((((((((((((((((((( \
|
|
1 \
|
|
)))))))))))))))))))))))))))))))))))))))))))))))))))))))) \
|
|
))))))))))))))))))))))))))))))))))))))))))))))))))))))))
|
|
# Parentheses can be nested at least to depth 112. There is nothing special
|
|
# about this number though, much higher numbers work as well, at least on
|
|
# NetBSD. The actual limit depends on the allowed call stack depth for C code
|
|
# of the platform. Anyway, 112 should be enough for all practical purposes.
|
|
.else
|
|
. error
|
|
.endif
|
|
|
|
# An unbalanced opening parenthesis is a parse error.
|
|
.if (
|
|
. error
|
|
.else
|
|
. error
|
|
.endif
|
|
|
|
# An unbalanced closing parenthesis is a parse error.
|
|
#
|
|
# Before cond.c 1.237 from 2021-01-19, CondParser_Term returned TOK_RPAREN
|
|
# even though the documentation of that function promised to only ever return
|
|
# TOK_TRUE, TOK_FALSE or TOK_ERROR. In cond.c 1.241, the return type of that
|
|
# function was changed to a properly restricted enum type, to prevent this bug
|
|
# from occurring again.
|
|
.if )
|
|
. error
|
|
.else
|
|
. error
|
|
.endif
|
|
|
|
all:
|
|
@:;
|