Add a new variable: GNUMAKEFLAGS

This allows you to write portable makefiles that set GNU make-specific command
line options in the environment or makefile: add them to GNUMAKEFLAGS instead
of MAKEFLAGS and they will be seen by GNU make but ignored by other
implementations of make.

1 files changed, 2 insertions, 0 deletions

diff --git a/default.c b/default.c
index 9f02dd4..4b24e2e 100644
--- a/default.c
+++ b/default.c
@@ -525,6 +525,8 @@ static const char *default_variables[] =
 #endif
 
 #endif /* !VMS */
+    /* Make this assignment to avoid undefined variable warnings.  */
+    "GNUMAKEFLAGS", "",
     0, 0
   };