gentoo-overlay/app-crypt/pdfcrack/files/pdfcrack-0.13-build.patch

just use implicit rules so correct variables get used

--- pdfcrack-0.13/Makefile
+++ pdfcrack-0.13/Makefile
@@ -1,16 +1,11 @@
-CFLAGS= -Wall -Wextra -O3 -g
+CFLAGS+= -Wall -Wextra
 
 all: pdfcrack
 
 pdfcrack: main.o sha256.o rc4.o md5.o pdfcrack.o pdfparser.o passwords.o common.o \
 	benchmark.o
-	gcc $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -o $@ $+
 
 pdfreader: pdfparser.o pdfreader.o common.o
-	gcc $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -o $@ $+
 
 clean:
 	rm -f pdfcrack pdfreader testreader *.o
-
-%.o: %.c
-	gcc $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -c -o $@ $+