commit 7b6eb33ecd88768b28c67ce5d2d68a7eed5936b6
Author: fanquake <fanquake@gmail.com>
Date:   Tue Aug 25 14:34:53 2020 +0800

    Remove rule that causes inadvertant header regeneration

    Otherwise the makefile will needlessly attempt to re-generate the
    headers with gperf. This can be dropped once the upstream build is fixed.

    See #10851.

diff --git a/src/Makefile.in b/src/Makefile.in
index f4626ad..4ae1b00 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -903,7 +903,7 @@ fcobjshash.gperf: fcobjshash.gperf.h fcobjs.h
 	' - > $@.tmp && \
 	mv -f $@.tmp $@ || ( $(RM) $@.tmp && false )

-fcobjshash.h: fcobjshash.gperf
+fcobjshash.h:
 	$(AM_V_GEN) $(GPERF) -m 100 $< > $@.tmp && \
 	mv -f $@.tmp $@ || ( $(RM) $@.tmp && false )