fixed some build file flaws

bin/Makefile.am

@@ -0,0 +1,45 @@
+AUTOMAKE_OPTIONS = nostdinc
+
+CPPFLAGS_COMMON = \
+	-I$(abs_builddir) \
+	-I$(abs_builddir)/../lib  \
+	-I$(abs_srcdir) \
+	-I$(abs_srcdir)/../lib \
+	-I$(includedir)
+CFLAGS_COMMON =
+LDFLAGS_COMMON = -L$(abs_builddir)/../lib -L$(libdir)
+
+## specify the libhawk.la file instead of -lhawk. 
+##Use -l for third party libraries for automatic inclusion to DEPENDENCIES .
+LIBADD_COMMON = ../lib/libhawk.la
+
+bin_PROGRAMS = hawk hawk-sed
+
+##################################################
+# hawk
+##################################################
+hawk_SOURCES = hawk.c 
+hawk_CPPFLAGS = $(CPPFLAGS_COMMON)
+hawk_CFLAGS = $(CFLAGS_COMMON)
+hawk_LDFLAGS = $(LDFLAGS_COMMON)
+##
+## -lm is omitted from dependency_libs in libhawk.la because
+## libhawk contains some C++ code and postdeps_CXX contains -lm.
+##
+## Under the default libtool configuration, postdeps is empty.
+## Under the C++ tagged libtool configuration, postdeps is set to 
+## the value of postdeps_CXX.
+##
+## libtool doesn't include -lm in dependency_libs in libhawk.la 
+## because libtool --tag=CXX is used for mixed C++ code.
+##
+## specify -lm to a C only target to satisify dependency regardless
+## of different behavior depending on the libtool tag.
+##
+hawk_LDADD = $(LIBADD_COMMON) $(LIBM)
+
+hawk_sed_SOURCES = sed.c
+hawk_sed_CPPFLAGS = $(CPPFLAGS_COMMON)
+hawk_sed_CFLAGS = $(CFLAGS_COMMON)
+hawk_sed_LDFLAGS = $(LDFLAGS_COMMON)
+hawk_sed_LDADD = $(LIBADD_COMMON) $(LIBM)