This patch is needed with newer gnu-make.
See https://bugs.gentoo.org/show_bug.cgi?id=705974
Adapted from https://www.gentoofan.org/gentoo/misc/gst/gst-plugins-good-1.16.2-make43.patch

--- gst-plugins-good-0.10.31/common/glib-gen.mak.orig	2011-12-11 20:10:47.000000000 +0100
+++ gst-plugins-good-0.10.31/common/glib-gen.mak	2023-04-21 23:17:39.432349564 +0200
@@ -1,11 +1,13 @@
 # these are the variables your Makefile.am should set
 # the example is based on the colorbalance interface
 
+H := \#
+
 #glib_enum_headers=$(colorbalance_headers)
 #glib_enum_define=GST_COLOR_BALANCE
 #glib_enum_prefix=gst_color_balance
 
-enum_headers=$(foreach h,$(glib_enum_headers),\n\#include \"$(h)\")
+enum_headers=$(foreach h,$(glib_enum_headers),\n$(H)include \"$(h)\")
 
 # these are all the rules generating the relevant files
 %-marshal.h: %-marshal.list
--- gst-plugins-good-0.10.31/common/gst-glib-gen.mak.orig	2011-12-11 20:10:47.000000000 +0100
+++ gst-plugins-good-0.10.31/common/gst-glib-gen.mak	2023-04-21 23:20:13.260456997 +0200
@@ -1,12 +1,14 @@
 # these are the variables your Makefile.am should set
 # the example is based on the colorbalance interface
 
+H := \#
+
 #glib_enum_headers=$(colorbalance_headers)
 #glib_enum_define=GST_COLOR_BALANCE
 #glib_gen_prefix=gst_color_balance
 #glib_gen_basename=colorbalance
 
-enum_headers=$(foreach h,$(glib_enum_headers),\n\#include \"$(h)\")
+enum_headers=$(foreach h,$(glib_enum_headers),\n$(H)include \"$(h)\")
 
 # these are all the rules generating the relevant files
 $(glib_gen_basename)-marshal.h: $(glib_gen_basename)-marshal.list