build: don't prefix the RHS of "GPERF = ..." with "lib/"

* gl/build-aux/prefix-gnulib-mk (prefix_assignment): Exempt
the RHS of a "GPERF = ..." assignment from lib/ prefixing.

diff --git a/gl/build-aux/prefix-gnulib-mk b/gl/build-aux/prefix-gnulib-mk
index 38471a9..f0806d7 100755 (executable)
--- a/gl/build-aux/prefix-gnulib-mk
+++ b/gl/build-aux/prefix-gnulib-mk
@@ -91,7 +91,11 @@ sub prefix_assignment ($$)
 
   # Some variables are initialized by gnulib.mk, and we don't want
   # that.  Change '=' to '+='.
-  if ($lhs_and_assign_op =~
+  if ($lhs_and_assign_op =~ /^GPERF =$/)
+    {
+      # Do not change the RHS, which specifies the GPERF program.
+    }
+  elsif ($lhs_and_assign_op =~
       /^(SUBDIRS|EXTRA_DIST|BUILT_SOURCES|SUFFIXES|MOSTLYCLEANFILES
          |CLEANFILES|DISTCLEANFILES|MAINTAINERCLEANFILES|AM_CFLAGS
          |AM_CPPFLAGS|AM_GNU_GETTEXT)\ =/x)