File config.mk.patch of Package surf

diff -up ./config.mk.orig ./config.mk
--- ./config.mk.orig	2020-05-18 19:06:17.483020303 +0200
+++ ./config.mk	2020-05-18 19:21:11.606388978 +0200
@@ -4,12 +4,12 @@ VERSION = 2.0
 # Customize below to fit your system
 
 # paths
-PREFIX = /usr/local
+PREFIX = /usr/
 MANPREFIX = ${PREFIX}/share/man
 LIBPREFIX = ${PREFIX}/lib/surf
 
-X11INC = /usr/X11R6/include
-X11LIB = /usr/X11R6/lib
+X11INC = `pkg-config --cflags x11`
+X11LIB = `pkg-config --libs x11`
 
 GTKINC = `pkg-config --cflags gtk+-3.0 webkit2gtk-4.0`
 GTKLIB = `pkg-config --libs gtk+-3.0 webkit2gtk-4.0`
@@ -20,7 +20,8 @@ LIBS = -L/usr/lib -lc -L${X11LIB} -lX11
 
 # flags
 CPPFLAGS = -DVERSION=\"${VERSION}\" -DWEBEXTDIR=\"${LIBPREFIX}\" -D_DEFAULT_SOURCE
-CFLAGS = -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
+CFLAGS = -pedantic -Wall -Os
+CFLAGS += -std=c99 ${INCS} ${CPPFLAGS}
 LDFLAGS = -s ${LIBS}
 
 # Solaris