[maemo-developers] Undefined reference error

[From: saurabh aggarwal]

The way we do things is to actually make the pro file using QT creator and
then use qmake in scratchbox/esbox to generate a makefile. We do it even for
non-QT projects.

Much easier to manage in my opinion.

Even if you manually need to edit the pro file, it is much easier than doing
it in a Makefile. You still need to configure your packages though -
CONFIG+=link_pkgconfig
PKGCONFIG+=libhal libhal-storage

-Saurabh

On Fri, May 14, 2010 at 3:19 PM, Dave Neary <dneary at maemo.org> wrote:

> Hi,
>
> David King wrote:
> > On 2010-05-14 11:13, David King <davidk at openismus.com> wrote:
> >> Yes, if you are using libhal and libhal-storage through pkg-config with
> >> autotools, then I guess that you have:
> >>
> >> PKG_CHECK_MODULES([HAL], [libhal libhal-storage])
> >>
> >> or similar in your configure.ac. If not, then you should add it.
> >
> > Sorry, the line above should be:
> >
> > PKG_CHECK_MODULES([HAL], [hal hal-storage])
>
> Ah, the joys of package names vs pkgconfig modules...
>
> The other way to do it with "normal" Makefileness is to get the CFLAGS
> for HAL and HAL Storage with:
>
>  pkg-config --cflags hal
>  pkg-config --cflags hal-storage
>
>
> and the LDFLAGS with
>
>  pkg-config --libs hal
>  pkg-config --libs hal-storage
>
> In practice, in the Makefile, it'd probably look like this:
>
> CFLAGS  = $(shell pkg-config --cflags hal hal-storage)
> LDFLAGS = $(shell pkg-config --libs hal hal-storage)
> OBJECTS = main.o
>
> myprog: $(OBJECTS)
>        cc $(CFLAGS) -o $(output) $(inputs) $(LDFLAGS)
>
> %.o: %.c
>        cc $(CFLAGS) -c $(input) -o $(output)
>
> Cheers,
> Dave.
>
> --
> maemo.org docsmaster
> Email: dneary at maemo.org
> Jabber: bolsh at jabber.org
>
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