toplevel Makefile isn't liked by GNU Make on OpenBSD

Imported from http://bugzilla.roxen.com/bugzilla/show_bug.cgi?id=3451

Reported by Ian Delahorne, Stacken ACC ian@stacken.kth.se

Trying to compile Pile 7.4.20 with GNU Make 3.80 on OpenBSD-current yields the following:

$ gmake install "Makefile", line 336: Need an operator No closing parenthesis in archive specification "Makefile", line 337: Error in archive specification: "|void|constant|class)>)|<" No closing parenthesis in archive specification "Makefile", line 337: Error in archive specification: "\t]{1,}" "Makefile", line 337: Need an operator sh: syntax error: `(' unexpected "Makefile", line 340: warning: "|->=?|<[<=]|==|>[=>]|[]=?|()|[%-!^&+<>|~/]))[ \t]*(/\4/' -r '/" returned non-zero status Fatal errors encountered -- cannot continue gmake: *** [install] Error 1