build: Actually use $LDFLAGS when linking

Otherwise annocheck complains that the binary has been linked without
-pie.

byaccj.spec

@@ -8,6 +8,8 @@ URL:		http://byaccj.sourceforge.net/
 
 Source0:	http://sourceforge.net/projects/byaccj/files/byaccj/1.15/byaccj1.15_src.tar.gz
 
+Patch0:		honor-ldflags.patch
+
 BuildRequires:  gcc
 BuildRequires:  make
 
@@ -28,6 +30,8 @@ Java now!
 chmod -c -x src/* docs/*
 sed -i -e 's|-arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -mmacosx-version-min=10.4||g' src/Makefile
 
+%autopatch -p1
+
 %build
 pushd src
 make yacc CFLAGS="%{optflags}" LDFLAGS="$RPM_LD_FLAGS"

honor-ldflags.patch

@@ -0,0 +1,12 @@
+diff -ruN byaccj1.15.orig/src/Makefile byaccj1.15/src/Makefile
+--- byaccj1.15.orig/src/Makefile	2020-11-23 15:20:38.376711773 +0100
++++ byaccj1.15/src/Makefile	2020-11-23 15:20:58.680671903 +0100
+@@ -75,7 +75,7 @@
+ 	$(CC) -c $(CFLAGS) $(INC) $< -o $@
+ 
+ yacc: $(OBJ)
+-	$(CC) -o yacc  $(OBJ)
++	$(CC) -o yacc $(LDFLAGS) $(OBJ)
+ 	@echo "done"
+ 
+ clean: