Build to static libs and DPDK into an image file - makefile

Question

I have a project lets call it AB, which looks a follows:
/path/to/<br>
---|dpdk-stable-17.05.1/...<br>
---|AB/<br>
------|main.cpp<br>
------|Makefile<br>
------|dir1/<br>
----------|c1.c<br>
----------|c2.c<br>
----------|c3.c<br>
----------|h1.h<br>
----------|Makefile<br>
------|dir2/<br>
----------|h2.h<br>
----------|cpp1.cpp<br>
----------|cpp2.cpp<br>
----------|Makefile<br>
I've compiled the dpdk with make install successfuly.
I am trying to create dir1.a and dir2.a and to build together with main.cpp and of-course the DPDK libs an "AB" image file.
The Makefile in AB (the main makefile) looks as follows:
>DPDK_VER=dpdk-stable-17.05.1
>
>RTE_SDK=$(shell pwd | sed -n 's/AB.*//p')/$(DPDK_VER)<br>
>RTE_TARGET=build
>
>include $(RTE_SDK)/mk/rte.vars.mk
>
>XXFLAGS := $(CFLAGS) -I../dir1/ -g<br>
>CXXFLAGS += -std=c++1y -D__STDC_LIMIT_MACROS -D__STDC_FORMAT_MACROS<br>
>CFLAGS += -g -O0 -std=gnu99 -Wall -Wno-unused-value<br>
>LDLIBS += -lfuse -lstdc++ --start-group -ldir1 -ldir2
>
>LDFLAGS += --end-group
>
>APP = AB
>
>SRCS-y := main.cpp
>
>OBJS-y := main.o
>
>SRCS-y := $(patsubst %.cpp,%.c,$(SRCS-y))<br>
>OBJS-y := $(patsubst %.o,obj/%.o,$(OBJS-y))
>
>DIRS-y = <br>
>DIRS-y += dir1<br>
>DIRS-y += dir2
>
>.PHONY: dirs-y $(DIRS-y)
>
>include $(RTE_SDK)/mk/rte.subdir.mk<br>
>include $(RTE_SDK)/mk/rte.extapp.mk
>
>.PHONY: clean<br>
>clean:<br>
> rm -rf *.o build/*.o build/$(APP)
The Makefile in dir1 looks:
>DPDK_VER=dpdk-stable-17.05.1
>
>RTE_SDK=$(shell pwd | sed -n 's/AB.*//p')/$(DPDK_VER)<BR>
>RTE_TARGET=build
>include $(RTE_SDK)/mk/rte.vars.mk
>
>export RTE_OUTPUT=$(shell pwd)/../build/
>
>CXXFLAGS := $(CFLAGS) -g<BR>
>CXXFLAGS += -std=c++1y -D__STDC_LIMIT_MACROS -D__STDC_FORMAT_MACROS -lgnustl_shared<br>
>CFLAGS += -g -O0 -std=gnu99 -Wall -Wno-unused-value -I../dir2
>
>LIB = dir1.a
>
>SRCS-y := c1.c c2.c c3.c<br>
>OBJS-y := c1.o c2.o c3.o
>
>SRCS-y := $(patsubst %.cpp,%.c,$(SRCS-y))<br>
>OBJS-y := $(patsubst %.o,obj/%.o,$(OBJS-y))
>
>include $(RTE_SDK)/mk/rte.extlib.mk
>
>.PHONY: all<br>
> all
>
>.PHONY: clean<br>
>clean:<br>
> rm -rf *.o *.a ../build/lib/$(LIB)'
The Makefile in dir2 looks:
>DPDK_VER=dpdk-stable-17.05.1
>
>RTE_SDK=$(shell pwd | sed -n 's/AB.*//p')/$(DPDK_VER)<br>
>RTE_TARGET=build
>
>include $(RTE_SDK)/mk/rte.vars.mk
>
>export RTE_OUTPUT=$(shell pwd)/../build/
>
>CXXFLAGS := $(CFLAGS) -g<br>
>CXXFLAGS += -std=c++1y -D__STDC_LIMIT_MACROS -D__STDC_FORMAT_MACROS -lgnustl_shared -I../dir1 -I.<br>
>CFLAGS += -g -O0 -std=gnu99 -Wall -Wno-unused-value<br>
>
>LIB = dir1.a
>
>SRCS-y := cpp1.cpp cpp2.cpp<br>
>OBJS-y := cpp1.o cpp2.o
>
>SRCS-y := $(patsubst %.cpp,%.c,$(SRCS-y))<br>
>OBJS-y := $(patsubst %.o,obj/%.o,$(OBJS-y))
>
>include $(RTE_SDK)/mk/rte.extlib.mk
>
>.PHONY: all<br>
> all
>
>.PHONY: clean<br>
>clean:<br>
> rm -rf *.o *.a ../build/lib/$(LIB)
the make output is:
== Build /dir1
CC c1.o
CC c2.o
CC c3.o
AR dir1.a
INSTALL-LIB dir1.a
== Build /dir2
g++ -m64 -pthread -march=native -DRTE_MACHINE_CPUFLAG_SSE -DRTE_MACHINE_CPUFLAG_SSE2 -DRTE_MACHINE_CPUFLAG_SSE3 -DRTE_MACHINE_CPUFLAG_SSSE3 -DRTE_MACHINE_CPUFLAG_SSE4_1 -DRTE_MACHINE_CPUFLAG_SSE4_2 -I/path/to/AB/build/include -I/path/to/dpdk-stable-17.05.1/build/include -include /path/to/dpdk-stable-17.05.1/build/include/rte_config.h -g -std=c++1y -D__STDC_LIMIT_MACROS -D__STDC_FORMAT_MACROS -lgnustl_shared -I../dir1 -I. -c -o cpp1.o cpp2.cpp
g++ -m64 -pthread -march=native -DRTE_MACHINE_CPUFLAG_SSE -DRTE_MACHINE_CPUFLAG_SSE2 -DRTE_MACHINE_CPUFLAG_SSE3 -DRTE_MACHINE_CPUFLAG_SSSE3 -DRTE_MACHINE_CPUFLAG_SSE4_1 -DRTE_MACHINE_CPUFLAG_SSE4_2 -I/path/to/AB/build/include -I/path/to/dpdk-stable-17.05.1/build/include -include /path/to/dpdk-stable-17.05.1/build/include/rte_config.h -g -std=c++1y -D__STDC_LIMIT_MACROS -D__STDC_FORMAT_MACROS -lgnustl_shared -I../dir1 -I. -c -o cpp2.o cpp2.cpp
AR dir2.a
INSTALL-LIB dir2.a
/path/to/dpdk-stable-17.05.1/mk/internal/rte.install-post.mk:98: warning: overriding recipe for target _postinstall'<br>
/path/to/dpdk-stable-17.05.1/mk/internal/rte.install-post.mk:75: warning: ignoring old recipe for target_postinstall'
/path/to//dpdk-stable-17.05.1/mk/internal/rte.clean-post.mk:61: warning: overriding recipe for target _postclean'<br>
/path/to//dpdk-stable-17.05.1/mk/internal/rte.clean-post.mk:38: warning: ignoring old recipe for target_postclean'
/path/to//dpdk-stable-17.05.1/mk/internal/rte.build-post.mk:38: warning: overriding recipe for target _postbuild'<br>
/path/to/dpdk-stable-17.05.1/mk/internal/rte.build-post.mk:38: warning: ignoring old recipe for target_postbuild'
/path/to/AB/Makefile:40: warning: overriding recipe for target clean'<br>
/path/to/dpdk-stable-17.05.1/mk/rte.app.mk:308: warning: ignoring old recipe for targetclean'
g++ -m64 -pthread -march=native -DRTE_MACHINE_CPUFLAG_SSE -DRTE_MACHINE_CPUFLAG_SSE2 -DRTE_MACHINE_CPUFLAG_SSE3 -DRTE_MACHINE_CPUFLAG_SSSE3 -DRTE_MACHINE_CPUFLAG_SSE4_1 -DRTE_MACHINE_CPUFLAG_SSE4_2 -I/path/to/AB/build/include -I/path/to/dpdk-stable-17.05.1/build/include -include /path/to/dpdk-stable-17.05.1/build/include/rte_config.h -I../dir1/ -g -std=c++1y -D__STDC_LIMIT_MACROS -D__STDC_FORMAT_MACROS -c -o main.o /path/to/AB/main.cpp
LD AB
== Build /path/to/AB/dir1
make[2]: * No rule to make target c1.o', needed bydir1.a'. >Stop.
make[1]: * [dir1] Error 2
make: *** [all] Error 2
The dir.a dir2.a and AB image are all created!
BUT:
1) why does the make goes back to Build dir1 at the end and announces that the c1.o is missing for dir1.o?
2) How to get rid of the "warning: ignoring old recipe for target `XXX'"?
Thanks!

Answer 1

The code is not quite reproducible, but I guess the root cause is that there are two includes in the main Makefile, rte.subdir.mk and rte.extapp.mk.
Try to put the main.cpp into an src directory and use just rte.subdir.mk in the main Makefile, moving all application build functionality to src/Makefile...