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#############################################################
#
# genext2fs to build to target ext2 filesystems
#
#############################################################
GENEXT2_DIR=$(BUILD_DIR)/genext2fs-1.3
GENEXT2_SOURCE=genext2fs_1.3.orig.tar.gz
GENEXT2_SITE=http://ftp.debian.org/debian/pool/main/g/genext2fs
GENEXT2_PATCH=$(SOURCE_DIR)/genext2fs.patch
$(DL_DIR)/$(GENEXT2_SOURCE):
$(WGET) -P $(DL_DIR) $(GENEXT2_SITE)/$(GENEXT2_SOURCE)
$(GENEXT2_DIR): $(DL_DIR)/$(GENEXT2_SOURCE) $(GENEXT2_PATCH)
zcat $(DL_DIR)/$(GENEXT2_SOURCE) | tar -C $(BUILD_DIR) -xvf -
mv $(GENEXT2_DIR).orig $(GENEXT2_DIR)
cat $(GENEXT2_PATCH) | patch -p1 -d $(GENEXT2_DIR)
$(GENEXT2_DIR)/genext2fs: $(GENEXT2_DIR)
$(MAKE) CFLAGS="-Wall -O2 -D_FILE_OFFSET_BITS=64 -D__USE_FILE_OFFSET64" -C $(GENEXT2_DIR);
touch -c $(GENEXT2_DIR)/genext2fs
genext2fs: $(GENEXT2_DIR)/genext2fs
#############################################################
#
# Build the ext2 root filesystem image
#
# Known problems :
# - genext2fs: couldn't allocate a block (no free space)
#
# Since genext2fs allocates only one group of blocks, the FS
# size is limited to a maximum of 8 Mb.
#
#############################################################
# how much KB we want to add to the calculated size for the root directory,
# to have additional space
GENEXT2_ADDTOROOTSIZE := 512
# maximal rootfilesystem size that can be handled
# by genext2fs
GENEXT2_MAXROOTSIZE := 8192
GENEXT2_REALSIZE=$(subst total,, $(shell du $(TARGET_DIR) -s -c -k | grep total ))
GENEXT2_SIZE=$(shell expr $(GENEXT2_REALSIZE) + $(GENEXT2_ADDTOROOTSIZE))
# We currently add about 400 device nodes, so add that into the total
GENEXT2_INODES=$(shell expr $(shell find $(TARGET_DIR) | wc -l) + 400)
ext2root: genext2fs
-@find $(TARGET_DIR)/lib -type f -name \*.so\* | xargs $(STRIP) --strip-unneeded 2>/dev/null || true;
-@find $(TARGET_DIR) -type f -perm +111 | xargs $(STRIP) 2>/dev/null || true;
$(GENEXT2_DIR)/genext2fs -i $(GENEXT2_INODES) -b $(GENEXT2_SIZE) \
-d $(TARGET_DIR) -q -D $(SOURCE_DIR)/device_table.txt $(IMAGE)
ext2root-source: $(DL_DIR)/$(GENEXT2_SOURCE)
ext2root-clean:
-make -C $(GENEXT2_DIR) clean
ext2root-dirclean:
rm -rf $(GENEXT2_DIR)
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