merge two rules with the same right hand;

document a bit what is done here.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@88587 65c4cc65-6c06-0410-ace0-fbb531ad65f3

Makefile.moddir_rules

@@ -11,6 +11,13 @@
 # the GNU General Public License
 #
 
+# Makefile rules for building modules.
+
+# In most cases, we set target-specific variables for certain targets
+# (remember that they apply recursively to prerequisites).
+# Also note that we can only set one variable per rule, so we have to
+# repeat the left hand side to set multiple variables.
+
 ifneq ($(findstring MALLOC_DEBUG,$(MENUSELECT_CFLAGS)),)
  ifeq ($(findstring astmm.h,$(ASTCFLAGS)),)
   ASTCFLAGS+=-include $(ASTTOPDIR)/include/asterisk/astmm.h
@@ -29,9 +36,14 @@ include $(ASTTOPDIR)/Makefile.rules
 
 comma:=,
 
-$(addsuffix .o,$(C_MODS)): ASTCFLAGS+=-DAST_MODULE=\"$*\" $(MENUSELECT_OPTS_$*:%=-D%) $(foreach dep,$(MENUSELECT_DEPENDS_$*),$(value $(dep)_INCLUDE))
-$(addsuffix .oo,$(CC_MODS)): ASTCFLAGS+=-DAST_MODULE=\"$*\" $(MENUSELECT_OPTS_$*:%=-D%) $(foreach dep,$(MENUSELECT_DEPENDS_$*),$(value $(dep)_INCLUDE))
+# Both C++ and C++ sources need their module name in AST_MODULE
+# We also pass whatever _INCLUDE list is generated by menuselect
+# (they are stored in file 'makeopts')
+
+$(addsuffix .oo,$(CC_MODS)) $(addsuffix .o,$(C_MODS)):	\
+	ASTCFLAGS+= -DAST_MODULE=\"$*\" $(MENUSELECT_OPTS_$*:%=-D%) $(foreach dep,$(MENUSELECT_DEPENDS_$*),$(value $(dep)_INCLUDE))
 
+# For loadable modules, pass _LIB and _LDFLAGS from menuselect.
 $(LOADABLE_MODS:%=%.so): ASTCFLAGS+=-fPIC
 $(LOADABLE_MODS:%=%.so): LIBS+=$(foreach dep,$(MENUSELECT_DEPENDS_$*),$(value $(dep)_LIB))
 $(LOADABLE_MODS:%=%.so): ASTLDFLAGS+=$(foreach dep,$(MENUSELECT_DEPENDS_$*),$(value $(dep)_LDFLAGS))