Automatically remove -m32 cflag from koreader-base makefile

build.sh

@@ -106,12 +106,21 @@ compile_firmware_okreader() {
 
 compile_koreader() {
   cd src/koreader
-  rm *.tar.gz
+
-  rm *.zip
+  # Remove previous builds
+  rm *.tar.gz *.zip
+
   make fetchthirdparty
+
+  # Remove -m32 cflag
+  patch -p1 < ../koreader_base_arm.patch
+
   make TARGET=kobo koboupdate
-  cd ..
+
-  cd koreader-pkg
+  # Reverse the patch so that koreader-base can be cleanly updated in the future
+  patch -R -p1 < ../koreader_base_arm.patch
+
+  cd ../koreader-pkg
   rm -R opt
   mkdir opt
   cd opt

src/koreader_base_arm.patch

@@ -0,0 +1,11 @@
+--- a/base/Makefile
++++ b/base/Makefile
+@@ -196,7 +196,7 @@ else
+ 	# Build its HOST/TARGET_CFLAGS based on CFLAGS, so we need
+ 	# a neutral CFLAGS without arch
+ 	$(MAKE) -j$(PROCESSORS) -C $(LUA_DIR) \
+-		CC="$(HOSTCC)" HOST_CC="$(HOSTCC) -m32" \
++		CC="$(HOSTCC)" HOST_CC="$(HOSTCC)" \
+ 		CFLAGS="$(BASE_CFLAGS)" HOST_CFLAGS="$(HOSTCFLAGS)" \
+ 		$(if $(WIN32),LDFLAGS="$(LDFLAGS)",) \
+ 		$(if $(WIN32),TARGET_SYS=Windows,) \