Import bmake-20250707

Intersting/relevant changes since bmake-20250618

ChangeLog since bmake-20250618

2025-07-07 Simon J Gerraty <sjg@beast.crufty.net>

• VERSION (_MAKE_VERSION): 20250707

Merge with NetBSD make, pick up
o cond.c: improve debug log message for 'exists' function.
complain about unfinished escape sequences or string literals.

2025-07-04 Simon J Gerraty <sjg@beast.crufty.net>

• VERSION (_MAKE_VERSION): 20250704

Merge with NetBSD make, pick up
o make.1: add a DIAGNOSTICS section for make to reference.
o main.c: simplify the warning for invalid -J by refering to
manual page.

2025-06-30 Simon J Gerraty <sjg@beast.crufty.net>

• VERSION (_MAKE_VERSION): 20250630

Merge with NetBSD make, pick up
o consistently use double quotes in error messages
o cond.c: if a condition is erroneous, skip the whole .if/.endif
o make_malloc.c: in cleanup mode, initialize freshly allocated memory
o str.c: error out on an ":M" modifier whose pattern ends with
backslash
o var.c: fix parsing of modifier parts for :gmtime and :localtime
add POSIX $^ support

mk/ChangeLog since bmake-20250618

2025-07-04 Simon J Gerraty <sjg@beast.crufty.net>

• prog.mk: .MADE is a special source not a target!