diff -up pnm2ppa-1.13/Makefile.am.rh pnm2ppa-1.13/Makefile.am
--- pnm2ppa-1.13/Makefile.am.rh	2023-10-20 13:22:50.893888824 +0200
+++ pnm2ppa-1.13/Makefile.am	2023-10-20 13:30:33.506822860 +0200
@@ -123,7 +123,7 @@ CLEANFILES = hash_ink.c make_hash_ink
 # run on the build host in case of cross compiling)
 #
 CC_FOR_BUILD = @CC_FOR_BUILD@
-CFLAGS_FOR_BUILD = -O2
+CFLAGS_FOR_BUILD = $(RPM_OPT_FLAGS) -O2
 CPPFLAGS_FOR_BUILD = -I$(top_srcdir)
 LDFLAGS_FOR_BUILD =
 LDLIBS_FOR_BUILD =
diff -up pnm2ppa-1.13/pbm2ppa-0.8.6/Makefile.rh pnm2ppa-1.13/pbm2ppa-0.8.6/Makefile
--- pnm2ppa-1.13/pbm2ppa-0.8.6/Makefile.rh	2023-10-20 13:18:54.058176682 +0200
+++ pnm2ppa-1.13/pbm2ppa-0.8.6/Makefile	2023-10-20 13:18:54.061176659 +0200
@@ -1,5 +1,5 @@
 CC=gcc
-CFLAGS=-Wall -O2 
+CFLAGS=$(RPM_OPT_FLAGS)
 LDFLAGS=
 PRINTER=HP720
 
diff -up pnm2ppa-1.13/pnm2ppa.conf.rh pnm2ppa-1.13/pnm2ppa.conf