Re: autoconf

[Ruben]

On Thu, 02 Oct 2008 15:21:25 -0400, Alfred M. Szmidt wrote:

>    I'm using this autogen.sh script
> 
> Use autoreconf.
> 
> 
>    This is my top level configure.ac
> 
> Looks fine.
> 
>    This is my toplevel Makefile.am
> 
> Looks fine.
> 
>    This is my src directory Makefile.am
> 
> Looks fine.
> 
>    one_window.cc:1:19: gtkmm.h: No such file or directory
> 
> You did not specify where the compiler should look for headers (and
> libraries).
> 
>    The resulting Makefile.in has 
> 
>    MYAPP_CFLAGS = @MYAPP_CFLAGS@
>    MYAPP_LIBS = @MYAPP_LIBS@
> 
> CFLAGS is used for C, not C++.  CXXFLAGS is what you wish to look at,
> and set.
> 
> PKG_CHECK_MODULES I have never used that variable, maybe it is buggy
> and does not set CXXFLAGS accordingly, check the documentation for it.
> And maybe check with the people who maintain that macro (it isn't part
> of autoconf or automake).

OK Alfred, you were right on the MONEY

So just to make this complete so that someone else can find this in the
future I want to cut and paste this conversation on irc
----------------------------------------------------------------------
* Now talking on #gtk+
* Topic for #gtk+ is:  Welcome to #gtk+:
http://library.gnome.org/devel/gtk/stable/ | GtkTreeView tutorial:
http://scentric.net/tutorial/ | Do use Glade! But, don't use Glade to
generate source code!-
http://developer.gnome.org/doc/API/2.0/libglade/index.html | Do not ask to
ask! * Topic for #gtk+ set by __tim at Tue Jul 15 09:57:10 2008 mrbrklyn
He;;p
mrbrklyn hello
mrbrklyn anyone have expereince with autoconf mrbrklyn and automake
descender that's off-topic, but yeah I have mrbrklyn well I'm trying to
use it with gtkmm according to the docs on that sight 
mrbrklyn and I can't get it to work, to find the gtk library 
mrbrklyn I'm missing something obvious and I don't know what it is
mrbrklyn http://www.nylxs.com/messages.html?id=538339&archive=2008-10-01
descender mrbrklyn, trying running pkg-config --modversion gtkmm-2.4 to
see if you have trouble with pkgconfig 
descender oh n/m, you've gone past that stage 
mrbrklyn pkg-config --modversion gtkmm-2.4 mrbrklyn 2.4.11 
descender mrbrklyn, try adding two Automake targets: 
descender onewindow_CXXFLAGS = $(MYAPP_CFLAGS) 
descender onewindow_LDADD = $(MYAPP_LIBS) descender then rerun autotools
descender .. variables I mean 
mrbrklyn add it to configure.ac? 
mrbrklyn or Makefile.am 
mrbrklyn ? 
descender mrbrklyn, the Makefile.am that resides alongside your C++ source
files 
descender that one with bin_PROGRAMS = onewindow 
mrbrklyn Ok - BRB
mrbrklyn descender - that did it. 
descender ok
mrbrklyn Now my question is why?
descender AFAICT, it has to do with your autoconf language settings
mrbrklyn I'm going to need to do that for every external lib? 
descender PKG_CHECK_MODULES added the flags to CFLAGS but not CXXFLAGS
descender CFLAGS isn't used to compile C++ programs= 
descender so the compiler flags were missing descender 
mrbrklyn, I add each lib manually 
mrbrklyn what does that mean?
descender which?
mrbrklyn to do it manually
descender like this:
descender onewindow_CXXFLAGS = $(LIB1_CFLAGS) $(LIB2_CFLAGS)
$(LIB3_CFLAGS) .. 
descender onewindow_LDADD = $(LIB1_LIBS) $(LIB2_LIBS) $(LIB3_LIBS) ..
descender I think it's possible to get PKG_CHECK_MODULES to add the
detected flags to CXXFLAGS by setting the language to C++ with
AC_LANG([CXX]) 
mrbrklyn thanks
descender I'm wrong, PKG_CHECK_MODULES never modifies CFLAGS or CXXFLAGS, 
so you always have to add the variables manually as in the example I gave
you 
descender I gotta go to bed


_______________________________________

The finished example for the autotool files look like this

configure.ac on the top level

AC_INIT(src/onewindow.cc)

AM_INIT_AUTOMAKE(onewindow_cc,0.1)
AM_CONFIG_HEADER(config.h)

AC_PROG_CC
AC_PROG_CXX

AC_PROG_INSTALL
AC_PROG_LIBTOOL

PKG_CHECK_MODULES([GTKMM], [gtkmm-2.4 >= 2.4.0])
AC_OUTPUT(Makefile src/Makefile)


_________________________________________________

Top Level Makefile.am

SUBDIRS = src
EXTRA_DIST=autogen.sh

______________________________________

/src level Makefile.am


AC_INIT(src/onewindow.cc)

AM_INIT_AUTOMAKE(onewindow_cc,0.1)
AM_CONFIG_HEADER(config.h)

AC_PROG_CC
AC_PROG_CXX

AC_PROG_INSTALL
AC_PROG_LIBTOOL

PKG_CHECK_MODULES([GTKMM], [gtkmm-2.4 >= 2.4.0])
AC_OUTPUT(Makefile src/Makefile)

________________________________________________

all this is in reference to corrections needed for the gtkmm tutorial
located at

http://www.gtkmm.org/docs/gtkmm-2.4/docs/tutorial/html/sec-headers-and-linking.html
and

http://www.openismus.com/documents/linux/automake/automake.shtml#ExampleFiles

Thanks for everyones help!

Ruben Safir

 
-- 
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