[NaCl SDK] Handle sources outside root in example build system

native_client_sdk/src/tools/host_gcc.mk

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 #
 # GNU Make based build file.  For details on GNU Make see:
 #   http://www.gnu.org/software/make/manual/make.html
 #
 #
 
@@ skipping 20 matching lines @@
 LINUX_CCFLAGS=-fPIC -pthread $(LINUX_WARNINGS) -I$(NACL_SDK_ROOT)/include -I$(NACL_SDK_ROOT)/include/linux
 
 
 #
 # Individual Macros
 #
 # $1 = Source Name
 # $2 = Compile Flags
 #
 define C_COMPILER_RULE
--include $(OUTDIR)/$(basename $(1)).d
-$(OUTDIR)/$(basename $(1)).o : $(1) $(TOP_MAKE) | $(dir $(OUTDIR)/$(basename $(1)))dir.stamp
+-include $(call SRC_TO_DEP,$(1))
+$(call SRC_TO_OBJ,$(1)): $(1) $(TOP_MAKE) | $(dir $(call SRC_TO_OBJ,$(1)))dir.stamp
         $(call LOG,CC,$$@,$(HOST_CC) -o $$@ -c $$< -fPIC $(POSIX_FLAGS) $(2) $(LINUX_FLAGS))
 endef
 
 define CXX_COMPILER_RULE
--include $(OUTDIR)/$(basename $(1)).d
-$(OUTDIR)/$(basename $(1)).o : $(1) $(TOP_MAKE) |$(dir $(OUTDIR)/$(basename $(1)))dir.stamp
+-include $(call SRC_TO_DEP,$(1))
+$(call SRC_TO_OBJ,$(1)): $(1) $(TOP_MAKE) | $(dir $(call SRC_TO_OBJ,$(1)))dir.stamp
         $(call LOG,CXX,$$@,$(HOST_CXX) -o $$@ -c $$< -fPIC $(POSIX_FLAGS) $(2) $(LINUX_FLAGS))
 endef
 
 
 # $1 = Source Name
 # $2 = POSIX Compile Flags
 # $3 = VC Flags (unused)
 #
 define COMPILE_RULE
-ifeq ('.c','$(suffix $(1))')
+ifeq ($(suffix $(1)),.c)
 $(call C_COMPILER_RULE,$(1),$(2) $(foreach inc,$(INC_PATHS),-I$(inc)))
 else
 $(call CXX_COMPILER_RULE,$(1),$(2) $(foreach inc,$(INC_PATHS),-I$(inc)))
 endif
 endef
 
 
 #
 # SO Macro
 #
 # $1 = Target Name
 # $2 = List of Sources
 #
 #
 define SO_RULE
 $(error 'Shared libraries not supported by Host')
 endef
 
 
 #
 # LIB Macro
 #
 # $1 = Target Name
 # $2 = List of Sources
 #
 #
 define LIB_RULE
-$(STAMPDIR)/$(1).stamp : $(NACL_SDK_ROOT)/lib/$(OSNAME)_host/$(CONFIG)/lib$(1).a
+$(STAMPDIR)/$(1).stamp: $(NACL_SDK_ROOT)/lib/$(OSNAME)_host/$(CONFIG)/lib$(1).a
         @echo "TOUCHED $$@" > $(STAMPDIR)/$(1).stamp
 
-all:$(NACL_SDK_ROOT)/lib/$(OSNAME)_host/$(CONFIG)/lib$(1).a
-$(NACL_SDK_ROOT)/lib/$(OSNAME)_host/$(CONFIG)/lib$(1).a : $(foreach src,$(2),$(OUTDIR)/$(basename $(src)).o)
+all: $(NACL_SDK_ROOT)/lib/$(OSNAME)_host/$(CONFIG)/lib$(1).a
+$(NACL_SDK_ROOT)/lib/$(OSNAME)_host/$(CONFIG)/lib$(1).a : $(foreach src,$(2),$(call SRC_TO_OBJ,$(src)))
         $(MKDIR) -p $$(dir $$@)
         $(call LOG,LIB,$$@,$(HOST_LIB) $$@ $$^)
 endef
 
 
 #
 # Link Macro
 #
 # $1 = Target Name
 # $2 = List of inputs
 # $3 = List of libs
 # $4 = List of deps
 # $5 = List of lib dirs
 # $6 = Other Linker Args
 #
 define LINKER_RULE
 all: $(1)
-$(1) : $(2) $(foreach dep,$(4),$(STAMPDIR)/$(dep).stamp)
+$(1): $(2) $(foreach dep,$(4),$(STAMPDIR)/$(dep).stamp)
         $(call LOG,LINK,$$@,$(HOST_LINK) -shared -o $(1) $(2) $(NACL_LDFLAGS) $(foreach path,$(5),-L$(path)/$(OSNAME)_host)/$(CONFIG) $(foreach lib,$(3),-l$(lib)) $(6))
 endef
 
 
 #
 # Link Macro
 #
 # $1 = Target Name
 # $2 = List of Sources
 # $3 = List of LIBS
 # $4 = List of DEPS
 # $5 = POSIX Linker Switches
 # $6 = VC Linker Switches
 #
 define LINK_RULE
-$(call LINKER_RULE,$(OUTDIR)/$(1)$(HOST_EXT),$(foreach src,$(2),$(OUTDIR)/$(basename $(src)).o),$(filter-out pthread,$(3)),$(4),$(LIB_PATHS),$(5))
+$(call LINKER_RULE,$(OUTDIR)/$(1)$(HOST_EXT),$(foreach src,$(2),$(call SRC_TO_OBJ,$(src))),$(filter-out pthread,$(3)),$(4),$(LIB_PATHS),$(5))
 endef
 
-
 all : $(LIB_LIST) $(DEPS_LIST)