It is unnecessary to pass MFLAGS to sub-makes, because it is evaluated implicitly if set by make. GNU make 4.2 sets both of -jN and --jobserver-auth (or --jobserver-fds in older versions) options which conflict. And it is useless for command line macros since Microsoft NMAKE does not set them.
Added by nobu (Nobuyoshi Nakada) almost 9 years ago
common.mk: remove explicit MFLAGS
It is unnecessary to pass MFLAGS to sub-makes, because it is
evaluated implicitly if set by make. GNU make 4.2 sets both of
-jN and --jobserver-auth (or --jobserver-fds in older versions)
options which conflict. And it is useless for command line macros
since Microsoft NMAKE does not set them.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57489 b2dd03c8-39d4-4d8f-98ff-823fe69b080e