Recursive makefile No rule to make target `all'. Stop - c

Question

The project is about a root directory that contains a src directory. I created two makefiles, one at the top directory and the other at the src directory. Here is the makefile of the src directory:
## Process this file with automake to produce Makefile.in
## Created by Netbeans
AM_CPPFLAGS = \
-DPACKAGE_LOCALE_DIR=\""$(localedir)"\" \
-DPACKAGE_SRC_DIR=\""$(srcdir)"\" \
-DPACKAGE_DATA_DIR=\""$(pkgdatadir)"\"
bin_PROGRAMS = scratchautotool
program_INCLUDE_DIRS := /usr/bin/PR__bin
program_LIBRARY_DIRS := /usr/lib/PR__lib
CFLAGS += $(foreach includedir,$(program_INCLUDE_DIRS),-I$(includedir))
AM_LDFLAGS += $(foreach librarydir,$(program_LIBRARY_DIRS),-L$(librarydir))
scratchautotool_SOURCES = \
main.c \
Task.c \
SeedVP.c
depend :
makedepend --$(CFLAGS) --$(scratchautotool_SOURCES)
The makefile of the root directory is shown below:
## Process this file with automake to produce Makefile.in
## Created by Netbeans
SUBDIRS = src
scratchautotooldocdir = ${prefix}/doc/scratchautotool
scratchautotooldoc_DATA = \
README\
COPYING\
AUTHORS\
ChangeLog\
INSTALL\
NEWS
INTLTOOL_FILES = intltool-extract.in \
intltool-merge.in \
intltool-update.in
EXTRA_DIST = $(scratchautotooldoc_DATA) \
$(INTLTOOL_FILES)
DISTCLEANFILES = intltool-extract \
intltool-merge \
intltool-update \
po/.intltool-merge-cache
# Remove doc directory on uninstall
uninstall-local:
-rm -r $(scratchautotooldocdir)
but while I was invoking make from the terminal it gave me the following error:
Making all in src
make[2]: Entering directory `../src'
make[2]: *** No rule to make target `all'. Stop.
make[2]: Leaving directory `../src'

Answer 1

The error is pretty clear: it is expecting to find the target all, and isn't. I'm assuming you called make without specifying a target; the default is (surprise!) all.

Answer 2

I want to share the solution for my question with any one who will encounter the same issue, I have modified the makefile as shown below:
all: scratchautotool
depend :
makedepend $(CFLAGS) $(scratchautotool_SOURCES)
but this also gave the same error, so I've searched and I've found that the makedepend didn't exist so I had to install xutils-dev package(which includes the program makedepend) using the below command:
sudo apt-get install xutils-dev
but this command solves the above mentioned issue only! but the makefile now has a new issue :)