makefiles: Add an APPLICATION_MODULE variable

Set the application module name with APPLICATION_MODULE.
The default module name is "application_$(APPLICATION)".

This should fix name conflicts where an application/test has the same name as
an existing module and so both write to the same archive.

Makefile.include

@@ -292,8 +292,12 @@ ifeq ($(origin RIOT_VERSION), undefined)
   endif
 endif
 
+# Set module by prepending APPLICATION name with 'application_'.
+# It prevents conflict with application and modules with the same name.
+APPLICATION_MODULE ?= application_$(APPLICATION)
+
 # the binaries to link
-BASELIBS += $(BINDIR)/${APPLICATION}.a
+BASELIBS += $(BINDIR)/$(APPLICATION_MODULE).a
 BASELIBS += $(APPDEPS)
 
 .PHONY: all link clean flash term doc debug debug-server reset objdump help info-modules

examples/bindist/Makefile

@@ -22,8 +22,8 @@ QUIET ?= 1
 # to flag that the directory should only be included when doing a normal build,
 # and that the resulting .a should be saved when doing "make bindist"
 BIN_DIRS += abc
-BIN_USEMODULE += abc        # include "abc" module
-BIN_USEMODULE += bindist    # include application module (named $APPLICATION)
+BIN_USEMODULE += abc                    # include "abc" module
+BIN_USEMODULE += $(APPLICATION_MODULE)  # include application module
 
 # list of extra files to include in binary distribution
 DIST_FILES += Makefile

makefiles/application.inc.mk

-MODULE = $(APPLICATION)
+MODULE = $(APPLICATION_MODULE)
 
 DIRS += $(RIOTCPU)/$(CPU) $(RIOTBOARD)/$(BOARD)
 DIRS += $(RIOTBASE)/core $(RIOTBASE)/drivers $(RIOTBASE)/sys

makefiles/vars.inc.mk

@@ -6,6 +6,7 @@ export QQ                    # as Q, but be more quiet
 export QUIET                 # The parameter to use whether to show verbose makefile commands or not.
 
 export APPLICATION           # The application, set in the Makefile which is run by the user.
+export APPLICATION_MODULE    # The application module name.
 export BOARD                 # The board to compile the application for.
 export CPU                   # The CPU, set by the board's Makefile.include.
 export CPU_MODEL             # The specific identifier of the used CPU, used for some CPU implementations to differentiate between different memory layouts