[PATCH V2] add support for LDFLAGS, don't overwrite CFLAGS

When cross compiling, the linker cannot find libz. This patch
adds the LDFLAGS variable to pass the linkerflags.

Based on earlier work by Erwin Rol and added suggestions from Mike
Frysinger.

Signed-off-by: Marc Kleine-Budde <mkl@...>
Signed-off-by: Wolfram Sang <w.sang@...>
Acked-by: Peter Korsgaard <jacmet@...>
---

Thanks for the suggestions, Mike!

 squashfs-tools/Makefile |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/squashfs-tools/Makefile b/squashfs-tools/Makefile
index f45d722..f6a0c0a 100644
--- a/squashfs-tools/Makefile
+++ b/squashfs-tools/Makefile
 <at>  <at>  -100,8 +100,9  <at>  <at>  MKSQUASHFS_OBJS = mksquashfs.o read_fs.o sort.o swap.o pseudo.o compressor.o
 UNSQUASHFS_OBJS = unsquashfs.o unsquash-1.o unsquash-2.o unsquash-3.o \
 	unsquash-4.o swap.o compressor.o

-CFLAGS = $(INCLUDEDIR) -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE \
-	-D_GNU_SOURCE -DCOMP_DEFAULT=\"$(COMP_DEFAULT)\"  -O2 -Wall
+CFLAGS ?= -O2
+CFLAGS += $(INCLUDEDIR) -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE \
+	-D_GNU_SOURCE -DCOMP_DEFAULT=\"$(COMP_DEFAULT)\" -Wall

 LIBS =
 ifdef GZIP_SUPPORT
 <at>  <at>  -196,7 +197,7  <at>  <at>  endif
 all: mksquashfs unsquashfs

 mksquashfs: $(MKSQUASHFS_OBJS)
-	$(CC) $(MKSQUASHFS_OBJS) -lpthread -lm $(LIBS) -o $ <at> 
+	$(CC) $(LDFLAGS) $(MKSQUASHFS_OBJS) -lpthread -lm $(LIBS) -o $ <at> 

 mksquashfs.o: mksquashfs.c squashfs_fs.h mksquashfs.h global.h sort.h \
 	squashfs_swap.h xattr.h
 <at>  <at>  -216,7 +217,7  <at>  <at>  xattr.o: xattr.h
 read_xattrs.o: xattr.h

 unsquashfs: $(UNSQUASHFS_OBJS)
-	$(CC) $(UNSQUASHFS_OBJS) -lpthread -lm $(LIBS) -o $ <at> 
+	$(CC) $(LDFLAGS) $(UNSQUASHFS_OBJS) -lpthread -lm $(LIBS) -o $ <at> 

 unsquashfs.o: unsquashfs.h unsquashfs.c squashfs_fs.h squashfs_swap.h \
 	squashfs_compat.h global.h xattr.h
--

-- 
1.7.2.3