File feh-makefile_optflags.patch of Package feh

diff -Pdru feh-3.3.orig/config.mk feh-3.3/config.mk
--- feh-3.3.orig/config.mk	2020-01-23 13:02:06.447700070 +0100
+++ feh-3.3/config.mk	2020-01-23 13:08:13.502047086 +0100
@@ -34,8 +34,8 @@
 scalable_icon_dir = ${icon_dir}/scalable/apps
 
 # default CFLAGS
-CFLAGS ?= -g -O2
-CFLAGS += -Wall -Wextra -pedantic
+OPTFLAGS = -g -O2
+CFLAGS += -Wall -Wextra -pedantic $(OPTFLAGS)
 
 # Settings for glibc >= 2.19 - may need to be adjusted for other systems
 CFLAGS += -std=c11 -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700
diff -Pdru feh-3.3.orig/src/Makefile feh-3.3/src/Makefile
--- feh-3.3.orig/src/Makefile	2020-01-23 13:02:06.451700139 +0100
+++ feh-3.3/src/Makefile	2020-01-23 13:06:40.140432705 +0100
@@ -40,7 +40,7 @@
 I_DSTS = ${I_SRCS:.raw=.inc}
 
 feh: deps.mk ${OBJECTS} ${I_DSTS}
-	${CC} ${LDFLAGS} ${CFLAGS} -o $@ ${OBJECTS} ${LDLIBS}
+	@${CC} ${LDFLAGS} ${CFLAGS} -o $@ ${OBJECTS} ${LDLIBS}
 
 include deps.mk