[bug #40227] Various fixes for MSVC build of 4.0

[Eli Zaretskii]

Follow-up Comment #7, bug #40227 (project make):

You are using MinGW64.  I use MinGW32 from mingw.org, a different distribution
with a different set of headers.

The tests you propose on __MINGW32_MAJOR_VERSION etc. will not distinguish
between MinGW64 and MinGW32.  So we need some other preprocessor symbols.

More importantly, I don't see the problems you report:

D:\gnu\make-4.0>gnumake -f no-Makefile
gnumake: no-Makefile: No such file or directory
gnumake: *** No rule to make target 'no-Makefile'.  Stop

See: no problem.  (Btw, what is gnumake32.exe in your case, and how is it
different from gnumake64.exe?)

Can you please step with a debugger into the offending code, and actually show
me what is failing there, and why?

Anyway, the only problem I know of with vsnprintf provided by the MS runtime
is that it returns -1 when there's not enough space in the buffer, instead
behaving like ANSI requires.  If that is the problem (but I still want to see
the code that fails due to this), it should be easy to fix with either (a) a
trivial one-liner that handles a negative return value as a value larger than
the buffer, or (b) by compiling Make with -D__USE_MINGW_ANSI_STDIO, which
causes these functions to be replaced with ANSI-compatible versions supplied
by MinGW.


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