CVS log for src/usr.bin/make/unit-tests/deptgt-posix.exp

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Default branch: MAIN

Revision 1.1 / (download) - annotate - [select for diffs], Mon Apr 18 15:06:28 2022 UTC (9 months, 2 weeks ago) by rillig
Branch: MAIN
CVS Tags: netbsd-10-base, netbsd-10, HEAD

make: only switch to POSIX mode if '.POSIX:' is the first line

https://pubs.opengroup.org/onlinepubs/9699919799/utilities/make.html
says that in order to make a makefile POSIX-conforming, its first
non-comment line must be the special dependency line '.POSIX:' without
any source dependencies.

Previously, make switched to POSIX mode even if such a line occurred
anywhere else, which was allowed by POSIX but was deep in the
"unspecified behavior" area.  For NetBSD make, there is no big
difference since it doesn't ship any <posix.mk> file, this change mainly
affects the bmake distribution.

Previously, makefiles that contain '.POSIX:' somewhere in the middle
could fail due to <posix.mk> resetting .SUFFIXES, among other things.

Suggested by Simon J. Gerraty, who also reviewed an earlier version of
this change.

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