An example of how to use the GNU Autotools (automake, autoconf and libtool)
with ROOT projects has also been available for several years at
ftp://ftp.slac.stanford.edu/users/langston/root/misc/event-example-0.01.tar.
gz.
I also submitted some updated examples, including a ROOT detection macro for
Autoconf, earlier this year to roottalk: see
http://root.cern.ch/root/roottalk/roottalk01/0009.html.
Rene and Fons, maybe now that a few users are beginning to discover the GNU
Autotools it would be useful to include at least my Autoconf m4 macros in
the ROOT distribution. It would allow users to use the MDL_HAVE_ROOT macro
to find the ROOT headers and libraries instead of the root-config script,
which may be more convenient when mixing ROOT with GNU Autoconf, Automake
and Libtool.
Regards, Matt
----- Original Message -----
From: "Christian Holm Christensen" <cholm@hehi03.nbi.dk>
To: <tareq@josiah.gmu.edu>
Cc: <roottalk@pcroot.cern.ch>
Sent: Monday, March 26, 2001 1:06 PM
Subject: Re: [ROOT] Makefiles and Dictionaries
> Hi Tareq,
>
> I strongly recommend you use the GNU Autotools (automake, autoconf and
> libtool) to build your thing. Suppose you have classes
>
> Tintin, Milou, Haddock, Tournesol
>
> and programs
>
> dupond, dupont
>
> and classes Tintin and Milou go into one library libHerge, Haddock and
> Tournesol another libMoulinsart. Then have directory structure like:
>
> .
> |-- Makefile.am
> |-- acinclude.m4
> |-- config
> | `-- config.mk
> |-- configure.in
> |-- detectives
> | |-- Makefile.am
> | |-- dupond.cxx
> | `-- dupont.cxx
> |-- herge
> | |-- Makefile.am
> | |-- inc
> | | |-- HergeInc.h
> | | |-- HergeLinkDef.h
> | | |-- Milou.h
> | | `-- Tintin.h
> | `-- src
> | |-- Milou.cxx
> | `-- Tintin.cxx
> `-- moulinsart
> |-- Makefile.am
> |-- inc
> | |-- Haddock.h
> | |-- MoulinsartInc.h
> | |-- MoulinsartLinkDef.h
> | `-- Tournesol.h
> `-- src
> |-- Haddock.cxx
> `-- Tournesol.cxx
>
> The content of the files
>
> Milou.h Milou.cxx Haddock.h Haddock.cxx
> Tintin.h Tintin.cxx Tournesol.h Tournesol.cxx
>
> as well as
>
> dupond.cxx dupont.cxx
>
> should be obvious, with only one cave-at: If you want to have
>
>
> class Tintin {
> private:
> Milou* fMilou; // Has-a relation
>
> friend class Haddock;
>
> ...
> }
>
> class Haddock {
> private:
> Milou* fMilou; // Hates-it's-guts-relation
> ...
> public:
> ....
> SetMilou(Tintin* tintin) { fMilou = tintin->fMilou; }
> }
>
> you'd better have the lines
>
> #ifndef TINTIN_H
> #include "Tintin.h"
> #endif
>
> in Haddock.h
>
> The contents of the files HergeLinkDef.h and MoulinsartLinkDef.h are
> the standard stuff for the CINT dictionary. HergeInc.h and
> MoulinsartInc.h should just include the headers for that library,
> e.g.,
>
> #ifndef TINTIN_H
> #inclide "Tintin.h"
> #endif
> #ifndef MILOU_H
> #include "Milou.h"
> #endif
>
> No for the interresting stuff. The toplevel Makefile.am should contain
> only
>
> # We're not native GNU
> AUTOMAKE_OPTIONS = foreign
>
> # our subdiretories.
> SUBDIRS = herge moulinsart detectives
>
> and configure.in should contain
>
> dnl this is a comment
> dnl this file _must_ exist
> AC_INIT(herge/src/Tintin.cxx)
> dnl name of package and version number
> AM_INIT_AUTOMAKE(adventure, 0.1.0)
> AC_PROG_CC
> AC_PROG_CXX
> AC_ROOT
> AC_ISC_POSIX
> AM_DISABLE_STATIC
> AM_PROG_LIBTOOL
>
> AC_OUTPUT([Makefile
> herge/Makefile
> moulinsart/Makefile
> detectives/Makefile], [])
>
> The file acinclude.m4 should contain all of build/misc/acinclude.m4
> (just copy it) from the ROOT source tree.
>
> So far so good. The toplevel Makefile takes us to the three
> subdirectories, and the configure script finds the ROOT installation
> (macro AC_ROOT) C and C++ compiler, and writes al the Makefiles. No
> this last step is ofcourse not at all automatic (wish it were); we
> need to help out a bit. This is where config/config.h enters the
> picture. In that file, we'll put some common stuff, here goes:
>
> SOVERSION = $(shell echo $(VERSION) | \
> sed 's/\(.*\)\.\(.*\)\.\(.*\)/\1:\2:0/')
> ROOTCONF = @ROOTCONF@
> ROOTCINT = $(shell $(ROOTCONF) --prefix)/bin/rootcint
> ROOTLIBS = $(shell $(ROOTCONF) --libs)
> ROOTGLIBS = $(shell $(ROOTCONF) --glibs)
> ROOTCFLAGS = $(shell $(ROOTCONF) --cflags)
> INCLUDES = -Iinc -I$(top_srcdir)/include $(ROOTCFLAGS)
> CINTINCLUDES = -Iinc -I$(top_srcdir)/include
> LIBS = $(ROOTLIBS)
> CLEANFILES = *Cint.cxx *Cint.h *~ core
>
> vpath %.cxx src
> vpath %.h inc
>
> %Cint.cxx:inc/%Inc.h inc/%LinkDef.h
> $(ROOTCINT) -f $@ -c $(CINTINCLUDES) $^
>
> all-local:
> $(INSTALL) -d $(top_srcdir)/include
> $(INSTALLDATA) $(addprefix inc/,$(HEADERS)) $(top_srcdir)/include
>
>
> This file will be included into the Makefile.am's so that we only need
> to do these things once. Notice the "@ROOTCONF@" that will be
> substituted with the path to root-config, as found by the configure
> script.
>
> Next, in each of the file herge/Makefile.am and
> moulinsart/Makefile.am, we put the definitions needed to make each
> library, for libHerge.so
>
> lib_LTLIBRARIES = libHerge.la
> libHerge_la_SOURCES = Tintin.h Tintin.cxx \
> Minou.h Minou.cxx \
> HergeCint.h HergeCint.cxx
> libHerge_la_LDFLAGS = -version-info $(SOVERSION)
> include_HEADERS = Tintin.h Minou.h
> BUILT_SOURCES = HergeCint.h HergeCint.cxx
>
> include $(top_srcdir)/config/config.mk
>
> and
>
> lib_LTLIBRARIES = libMoulinsart.la
> libMoulinsart_la_SOURCES = Haddock.h Haddock.cxx \
> Tournesol.h Tournesol.cxx \
> MoulinsartCint.h MoulinsartCint.cxx
> libMoulinsart_la_LDFLAGS = -version-info $(SOVERSION)
> include_HEADERS = Haddock.h Tournesol.h
> BUILT_SOURCES = MoulinsartCint.h MoulinsartCint.cxx
>
> include $(top_srcdir)/config/config.mk
>
> Never mind the odd .la in the names. It'll turn out right in the end.
> To make the program dupont and dupond, we need to link agianst
> libHerge and libMoulinsart. Here's what we put in
> detectives/Makefile.am:
>
> bin_PROGRAMS = dupond dupont
> dupond_SOURCES = dupond.cxx
> dupont_SOURCES = dupont.cxx
> dupond_LDADD = ../herge/libHerge.la \
> ../moulinsart/libMoulinsart.la
> dupont_LDADD = ../herge/libHerge.la \
> ../moulinsart/libMoulinsart.la
>
> include $(top_srcdir)/config/config.mk
>
> That is it for the files. Now for the procedure. Cd into you package,
> and do
>
> automake -a
> autoconf
>
>
> to make the Makefile.ins and the configure script. This step is only
> needed if you change something in the diretories (add/remove
> files). Then configure your sources,
>
> ./configure --prefix=${HOME}/install
>
> (prefix should be set to somewhere you may write, default is
> /usr/local). This step should always be done before building. Now all
> the Makefiles are created (take a quick glance in some of them - they
> are ugly, but very efficient). Now you can build
>
> make
>
> and dosn't forget to install
> (don't-eat-where-you-s**t-philosophy). That is it!
>
> Hope that helps you a bit.
>
> Yours,
>
> Christian -----------------------------------------------------------
> Holm Christensen Phone: (+45) 35 35 96 91
> Sankt Hansgade 23, 1. th. Office: (+45) 353 25 305
> DK-2200 Copenhagen N Web: www.nbi.dk/~cholm
> Denmark Email: cholm@nbi.dk
>
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