Solaris specific patch to allow both test and system-test to work.
Has been offered upstream.

--- gawk-4.1.3/test/Makefile.in 2015-12-08 10:50:43.203348353 -0800
+++ gawk-4.1.3/test/Makefile.in 2015-12-08 10:51:00.745983630 -0800
@@ -1695,7 +1695,7 @@ lc_num1:
 # so this can still fail
 poundbang::
 	@echo $@
-	@sed "s;/tmp/gawk;`pwd`/$(AWKPROG);" < "$(srcdir)"/poundbang.awk > ./_pbd.awk
+	@sed "s;/tmp/gawk;$(AWKPROG);" < "$(srcdir)"/poundbang.awk > ./_pbd.awk
 	@chmod +x ./_pbd.awk
 	@if ./_pbd.awk "$(srcdir)"/poundbang.awk > _`basename $@` ; \
 	then : ; \