[Savannah #20501] Handle adding -r/-R to MAKEFLAGS in the makefile.

If -R is set in the makefile and not the command line, then go through all the
default variables and undefine them.  If -r is set in the makefile and not in
the command line, then remove all .SUFFIX prefixes (unless the user set it)
and SUFFIX variable setting.  In -p mode don't print builtins.

1 files changed, 1 insertions, 0 deletions

diff --git a/makeint.h b/makeint.h
index ae7e813..9d351c9 100644
--- a/makeint.h
+++ b/makeint.h
@@ -454,6 +454,7 @@ const char *dir_name (const char *);
 void hash_init_directories (void);
 
 void define_default_variables (void);
+void undefine_default_variables (void);
 void set_default_suffixes (void);
 void install_default_suffix_rules (void);
 void install_default_implicit_rules (void);