[Buildroot] Make problems

[Buildroot] Make problems

[Kleegrewe, Christian]

Hi all,

I tried to integrate a simple software project into the buildroot, but it does not compile. The problem is, that the compilation process is not started. The target is added correctly to TARGETS and the copying at the beginning of the hello.mk is performed correctly, but the $(MAKE) is never called. I suspect that it is a problem with the definition of the corresponding target.

Here are my Config.in

config BR2_PACKAGE_HELLO
	bool "hello"
	default y
	help
	  hello world test programm to test integration of a 
	  third party software to the buildroot

And my hello.mk File

#############################################################
#
# Any custom stuff you feel like doing....
#
#############################################################
HELLO_DIR=package/hello
HELLO_SOURCE_DIR=$(HOME)/embedded_p2p/hello
HELLO=hello
HELLO_BINARY=hello

$(HELLO):
	-cp -af $(HELLO_SOURCE_DIR)/* $(HELLO_DIR)/
	touch $@
	touch -c $(HELLO_DIR)/hello.cpp

$(HELLO_DIR)/$(HELLO_BINARY): $(HELLO_DIR)/hello.cpp $(HELLO_DIR)
	$(MAKE) CFLAGS="$(TARGET_CFLAGS)" DEBUG=true KLIBC?lse \
	    KERNEL_INCLUDE_DIR=$(STAGING_DIR)/include \
	    TARGET_DIR=$(TARGET_DIR) -C $(HELLO_SOURCE_DIR) -o $(HELLO_BINARY);

#############################################################
#
# Toplevel Makefile options
#
#############################################################
ifeq ($(strip $(BR2_PACKAGE_HELLO)),y)
TARGETS+=hello
Endif

I tried to find a sollution for my problem in the mailing list archives, but it is difficult to search.

Any help will be appreciated

Thanks Christian
--------------------------------------8<-----------------------------------------------------

Christian Kleegrewe
CT IC 6
Fon: +49 89 636 42722
Fax: +49 89 636 41423
Mail: mailto:christian.kleegrewe@siemens.com

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[Buildroot] Make problems

[Bernhard Fischer]

On Thu, Jan 25, 2007 at 10:15:12AM +0100, Kleegrewe, Christian wrote:
>Hi all,
>
>I tried to integrate a simple software project into the buildroot, but it does not compile. The problem is, that the compilation process is not started. The target is added correctly to TARGETS and the copying at the beginning of the hello.mk is performed correctly, but the $(MAKE) is never called. I suspect that it is a problem with the definition of the corresponding target.


>I tried to find a sollution for my problem in the mailing list archives, but it is difficult to search.

http://buildroot.uclibc.org/lists.html
http://buildroot.uclibc.org/buildroot.html#add_software

[Buildroot] Make problems

[Nathanael D. Noblet]

Kleegrewe, Christian wrote:
>
> And my hello.mk File
>
> #############################################################
> #
> # Any custom stuff you feel like doing....
> #
> #############################################################
> HELLO_DIR=package/hello
> HELLO_SOURCE_DIR=$(HOME)/embedded_p2p/hello
> HELLO=hello
> HELLO_BINARY=hello
>
> $(HELLO):
>         -cp -af $(HELLO_SOURCE_DIR)/* $(HELLO_DIR)/
>         touch $@
>         touch -c $(HELLO_DIR)/hello.cpp
>
> $(HELLO_DIR)/$(HELLO_BINARY): $(HELLO_DIR)/hello.cpp $(HELLO_DIR)
>         $(MAKE) CFLAGS="$(TARGET_CFLAGS)" DEBUG=true KLIBC=false \
>             KERNEL_INCLUDE_DIR=$(STAGING_DIR)/include \
>             TARGET_DIR=$(TARGET_DIR) -C $(HELLO_SOURCE_DIR) -o 
> $(HELLO_BINARY);
>

if you look at other makefiles in buildroot, you'll see usually the last 
line (though position isn't important)

programname: $(PROGRAM_DIR)/$(TARGET_BINARY) ....

make deals with dependancies and dependency trees, so the line is like so

target: dependancy1 dependancy2
      tasks for target
      tasks for target

dependancy1: dependancy3
     tasks for dependency1

dependancy2:
    tasks for dependency2

dependancy3:
    tasks for dependency3


if I used this makefile directly and did `make target` I would get
tasks for dependency3
tasks for dependency1
tasks for dependency2
tasks for target

so with your makefile, you've made the end target of program name = 
hello, the only thing to run. In your
ifeq ($(strip $(BR2_PACKAGE_HELLO)),y)
TARGETS+=hello
Endif

hello: is added as a target, but your makefile has hello: as a 
dependency free target. it does the first part, but that is it. so 
change it so it is something like
$(HELLO_DIR):
    mkdir $(HELLO_DIR)

$(HELLO_DIR)/hello.cpp: $(HELLO_DIR)
    tasks including your touch $HELLO_DIR/hello.cpp

$(HELLO_DIR)/$(HELLO_BINARY): $(HELLO_DIR)/hello.cpp
       tasks...

hello: $(HELLO_DIR)/$(HELLO_BINARY)